Merge pull request #39 from adafruit/main

Merge from adafruit main for RP2040

71 files changed, 5625 insertions, 0 deletions

diff --git a/ports/raspberrypi/.gitignore b/ports/raspberrypi/.gitignore
new file mode 100644
index 000000000..414487d53
--- /dev/null
+++ b/ports/raspberrypi/.gitignore
@@ -0,0 +1 @@
+build-*/
diff --git a/ports/raspberrypi/Makefile b/ports/raspberrypi/Makefile
new file mode 100644
index 000000000..a604acb47
--- /dev/null
+++ b/ports/raspberrypi/Makefile
@@ -0,0 +1,274 @@
+# This file is part of the MicroPython project, http://micropython.org/
+#
+# The MIT License (MIT)
+#
+# SPDX-FileCopyrightText: Copyright (c) 2019 Dan Halbert for Adafruit Industries
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+# Select the board to build for.
+ifeq ($(BOARD),)
+  $(error You must provide a BOARD parameter)
+else
+  ifeq ($(wildcard boards/$(BOARD)/.),)
+    $(error Invalid BOARD specified)
+  endif
+endif
+
+# If the build directory is not given, make it reflect the board name.
+BUILD ?= build-$(BOARD)
+
+include ../../py/mkenv.mk
+# Board-specific
+include boards/$(BOARD)/mpconfigboard.mk
+# Port-specific
+include mpconfigport.mk
+# CircuitPython-specific
+include $(TOP)/py/circuitpy_mpconfig.mk
+
+# qstr definitions (must come before including py.mk)
+QSTR_DEFS = qstrdefsport.h
+
+# include py core make definitions
+include $(TOP)/py/py.mk
+
+include $(TOP)/supervisor/supervisor.mk
+
+# Include make rules and variables common across CircuitPython builds.
+include $(TOP)/py/circuitpy_defns.mk
+
+CROSS_COMPILE = arm-none-eabi-
+
+HAL_DIR=hal/$(MCU_SERIES)
+
+INC += -I. \
+       -I../.. \
+       -I../lib/mp-readline \
+       -I../lib/timeutils \
+       -Iboards/$(BOARD) \
+       -Iboards/ \
+       -isystem sdk/ \
+       -isystem sdk/src/common/pico_base/include/ \
+       -isystem sdk/src/common/pico_binary_info/include/ \
+       -isystem sdk/src/common/pico_stdlib/include/ \
+       -isystem sdk/src/common/pico_sync/include/ \
+       -isystem sdk/src/common/pico_time/include/ \
+       -isystem sdk/src/common/pico_util/include/ \
+       -isystem sdk/src/rp2040/hardware_regs/include/ \
+       -isystem sdk/src/rp2040/hardware_structs/include/ \
+       -isystem sdk/src/rp2_common/hardware_adc/include/ \
+       -isystem sdk/src/rp2_common/hardware_base/include/ \
+       -isystem sdk/src/rp2_common/hardware_claim/include/ \
+       -isystem sdk/src/rp2_common/hardware_clocks/include/ \
+       -isystem sdk/src/rp2_common/hardware_dma/include/ \
+       -isystem sdk/src/rp2_common/hardware_flash/include/ \
+       -isystem sdk/src/rp2_common/hardware_gpio/include/ \
+       -isystem sdk/src/rp2_common/hardware_irq/include/ \
+       -isystem sdk/src/rp2_common/hardware_i2c/include/ \
+       -isystem sdk/src/rp2_common/hardware_pio/include/ \
+       -isystem sdk/src/rp2_common/hardware_pll/include/ \
+       -isystem sdk/src/rp2_common/hardware_resets/include/ \
+       -isystem sdk/src/rp2_common/hardware_spi/include/ \
+       -isystem sdk/src/rp2_common/hardware_sync/include/ \
+       -isystem sdk/src/rp2_common/hardware_timer/include/ \
+       -isystem sdk/src/rp2_common/hardware_uart/include/ \
+       -isystem sdk/src/rp2_common/hardware_watchdog/include/ \
+       -isystem sdk/src/rp2_common/hardware_xosc/include/ \
+       -isystem sdk/src/rp2_common/pico_multicore/include/ \
+       -isystem sdk/src/rp2_common/pico_fix/rp2040_usb_device_enumeration/include/ \
+       -isystem sdk/src/rp2_common/pico_stdio/include/ \
+       -isystem sdk/src/rp2_common/pico_printf/include/ \
+       -isystem sdk/src/rp2_common/pico_float/include/ \
+       -isystem sdk/src/rp2_common/pico_platform/include/ \
+       -isystem sdk/src/rp2_common/pico_runtime/printf/include/ \
+       -isystem sdk/src/rp2_common/pico_bootrom/include/ \
+       -Isdk_config \
+       -I../../lib/tinyusb/src \
+       -I../../supervisor/shared/usb \
+       -I$(BUILD)
+
+# Pico specific configuration
+CFLAGS += -DPICO_ON_DEVICE=1 -DPICO_NO_BINARY_INFO=0 -DPICO_TIME_DEFAULT_ALARM_POOL_DISABLED=1 -DPICO_DIVIDER_CALL_IDIV0=0 -DPICO_DIVIDER_CALL_LDIV0=0 -DPICO_DIVIDER_HARDWARE=1 -DPICO_DOUBLE_ROM=1 -DPICO_FLOAT_ROM=1 -DPICO_MULTICORE=1 -DPICO_BITS_IN_RAM=0 -DPICO_DIVIDER_IN_RAM=0 -DPICO_DOUBLE_PROPAGATE_NANS=0 -DPICO_DOUBLE_IN_RAM=0 -DPICO_MEM_IN_RAM=0 -DPICO_FLOAT_IN_RAM=0 -DPICO_FLOAT_PROPAGATE_NANS=1 -DPICO_NO_FLASH=0 -DPICO_COPY_TO_RAM=0 -DPICO_DISABLE_SHARED_IRQ_HANDLERS=0
+OPTIMIZATION_FLAGS ?= -O3
+# TinyUSB defines
+CFLAGS += -DTUD_OPT_RP2040_USB_DEVICE_ENUMERATION_FIX=1 -DCFG_TUSB_MCU=OPT_MCU_RP2040 -DCFG_TUD_MIDI_RX_BUFSIZE=128 -DCFG_TUD_CDC_RX_BUFSIZE=256 -DCFG_TUD_MIDI_TX_BUFSIZE=128 -DCFG_TUD_CDC_TX_BUFSIZE=256 -DCFG_TUD_MSC_BUFSIZE=1024
+
+# option to override default optimization level, set in boards/$(BOARD)/mpconfigboard.mk
+CFLAGS += $(OPTIMIZATION_FLAGS)
+
+#Debugging/Optimization
+ifeq ($(DEBUG), 1)
+  CFLAGS += -ggdb3 -Og
+  # No LTO because we may place some functions in RAM instead of flash.
+else
+  CFLAGS += -DNDEBUG
+
+  # No LTO because we may place some functions in RAM instead of flash.
+
+  ifdef CFLAGS_BOARD
+    CFLAGS += $(CFLAGS_BOARD)
+  endif
+endif
+
+# Remove -Wno-stringop-overflow after we can test with CI's GCC 10. Mac's looks weird.
+DISABLE_WARNINGS = -Wno-stringop-overflow -Wno-unused-function -Wno-unused-variable -Wno-strict-overflow -Wno-cast-align -Wno-strict-prototypes -Wno-nested-externs -Wno-double-promotion -Wno-sign-compare
+
+CFLAGS += $(INC) -Wall -Werror -std=gnu11 -nostdlib -fshort-enums $(BASE_CFLAGS) $(CFLAGS_MOD) $(COPT) $(DISABLE_WARNINGS)
+
+CFLAGS += \
+  -march=armv6-m \
+  -mthumb \
+	-mabi=aapcs-linux \
+	-mcpu=cortex-m0plus \
+	-msoft-float \
+	-mfloat-abi=soft
+
+PICO_LDFLAGS = --specs=nosys.specs -Wl,--wrap=__aeabi_ldiv0 -Wl,--wrap=__aeabi_idiv0 -Wl,--wrap=__aeabi_lmul -Wl,--wrap=__clzsi2 -Wl,--wrap=__clzdi2 -Wl,--wrap=__ctzsi2 -Wl,--wrap=__ctzdi2 -Wl,--wrap=__popcountsi2 -Wl,--wrap=__popcountdi2 -Wl,--wrap=__clz -Wl,--wrap=__clzl -Wl,--wrap=__clzll -Wl,--wrap=__aeabi_idiv -Wl,--wrap=__aeabi_idivmod -Wl,--wrap=__aeabi_ldivmod -Wl,--wrap=__aeabi_uidiv -Wl,--wrap=__aeabi_uidivmod -Wl,--wrap=__aeabi_uldivmod -Wl,--wrap=__aeabi_dadd -Wl,--wrap=__aeabi_ddiv -Wl,--wrap=__aeabi_dmul -Wl,--wrap=__aeabi_drsub -Wl,--wrap=__aeabi_dsub -Wl,--wrap=__aeabi_cdcmpeq -Wl,--wrap=__aeabi_cdrcmple -Wl,--wrap=__aeabi_cdcmple -Wl,--wrap=__aeabi_dcmpeq -Wl,--wrap=__aeabi_dcmplt -Wl,--wrap=__aeabi_dcmple -Wl,--wrap=__aeabi_dcmpge -Wl,--wrap=__aeabi_dcmpgt -Wl,--wrap=__aeabi_dcmpun -Wl,--wrap=__aeabi_i2d -Wl,--wrap=__aeabi_l2d -Wl,--wrap=__aeabi_ui2d -Wl,--wrap=__aeabi_ul2d -Wl,--wrap=__aeabi_d2iz -Wl,--wrap=__aeabi_d2lz -Wl,--wrap=__aeabi_d2uiz -Wl,--wrap=__aeabi_d2ulz -Wl,--wrap=__aeabi_d2f -Wl,--wrap=sqrt -Wl,--wrap=cos -Wl,--wrap=sin -Wl,--wrap=tan -Wl,--wrap=atan2 -Wl,--wrap=exp -Wl,--wrap=log -Wl,--wrap=ldexp -Wl,--wrap=copysign -Wl,--wrap=trunc -Wl,--wrap=floor -Wl,--wrap=ceil -Wl,--wrap=round -Wl,--wrap=sincos -Wl,--wrap=asin -Wl,--wrap=acos -Wl,--wrap=atan -Wl,--wrap=sinh -Wl,--wrap=cosh -Wl,--wrap=tanh -Wl,--wrap=asinh -Wl,--wrap=acosh -Wl,--wrap=atanh -Wl,--wrap=exp2 -Wl,--wrap=log2 -Wl,--wrap=exp10 -Wl,--wrap=log10 -Wl,--wrap=pow -Wl,--wrap=powint -Wl,--wrap=hypot -Wl,--wrap=cbrt -Wl,--wrap=fmod -Wl,--wrap=drem -Wl,--wrap=remainder -Wl,--wrap=remquo -Wl,--wrap=expm1 -Wl,--wrap=log1p -Wl,--wrap=fma -Wl,--wrap=__aeabi_fadd -Wl,--wrap=__aeabi_fdiv -Wl,--wrap=__aeabi_fmul -Wl,--wrap=__aeabi_frsub -Wl,--wrap=__aeabi_fsub -Wl,--wrap=__aeabi_cfcmpeq -Wl,--wrap=__aeabi_cfrcmple -Wl,--wrap=__aeabi_cfcmple -Wl,--wrap=__aeabi_fcmpeq -Wl,--wrap=__aeabi_fcmplt -Wl,--wrap=__aeabi_fcmple -Wl,--wrap=__aeabi_fcmpge -Wl,--wrap=__aeabi_fcmpgt -Wl,--wrap=__aeabi_fcmpun -Wl,--wrap=__aeabi_i2f -Wl,--wrap=__aeabi_l2f -Wl,--wrap=__aeabi_ui2f -Wl,--wrap=__aeabi_ul2f -Wl,--wrap=__aeabi_f2iz -Wl,--wrap=__aeabi_f2lz -Wl,--wrap=__aeabi_f2uiz -Wl,--wrap=__aeabi_f2ulz -Wl,--wrap=__aeabi_f2d -Wl,--wrap=sqrtf -Wl,--wrap=cosf -Wl,--wrap=sinf -Wl,--wrap=tanf -Wl,--wrap=atan2f -Wl,--wrap=expf -Wl,--wrap=logf -Wl,--wrap=ldexpf -Wl,--wrap=copysignf -Wl,--wrap=truncf -Wl,--wrap=floorf -Wl,--wrap=ceilf -Wl,--wrap=roundf -Wl,--wrap=sincosf -Wl,--wrap=asinf -Wl,--wrap=acosf -Wl,--wrap=atanf -Wl,--wrap=sinhf -Wl,--wrap=coshf -Wl,--wrap=tanhf -Wl,--wrap=asinhf -Wl,--wrap=acoshf -Wl,--wrap=atanhf -Wl,--wrap=exp2f -Wl,--wrap=log2f -Wl,--wrap=exp10f -Wl,--wrap=log10f -Wl,--wrap=powf -Wl,--wrap=powintf -Wl,--wrap=hypotf -Wl,--wrap=cbrtf -Wl,--wrap=fmodf -Wl,--wrap=dremf -Wl,--wrap=remainderf -Wl,--wrap=remquof -Wl,--wrap=expm1f -Wl,--wrap=log1pf -Wl,--wrap=fmaf -Wl,--wrap=memcpy -Wl,--wrap=memset -Wl,--wrap=__aeabi_memcpy -Wl,--wrap=__aeabi_memset -Wl,--wrap=__aeabi_memcpy4 -Wl,--wrap=__aeabi_memset4 -Wl,--wrap=__aeabi_memcpy8 -Wl,--wrap=__aeabi_memset8
+
+LDFLAGS = $(CFLAGS) $(PICO_LDFLAGS) -Wl,-T,link.ld -Wl,-Map=$@.map -Wl,-cref -Wl,--gc-sections
+
+# Use toolchain libm if we're not using our own.
+ifndef INTERNAL_LIBM
+LIBS += -lm
+endif
+
+LDFLAGS += -mthumb -mcpu=cortex-m0plus
+
+SRC_SDK := \
+	src/common/pico_sync/critical_section.c \
+	src/common/pico_sync/lock_core.c \
+	src/common/pico_sync/mutex.c \
+	src/common/pico_time/time.c \
+	src/common/pico_util/pheap.c \
+	src/rp2_common/hardware_adc/adc.c \
+	src/rp2_common/hardware_claim/claim.c \
+	src/rp2_common/hardware_clocks/clocks.c \
+	src/rp2_common/hardware_dma/dma.c \
+	src/rp2_common/hardware_flash/flash.c \
+	src/rp2_common/hardware_gpio/gpio.c \
+	src/rp2_common/hardware_i2c/i2c.c \
+	src/rp2_common/hardware_irq/irq.c \
+	src/rp2_common/hardware_pio/pio.c \
+	src/rp2_common/hardware_pll/pll.c \
+	src/rp2_common/hardware_spi/spi.c \
+	src/rp2_common/hardware_sync/sync.c \
+	src/rp2_common/hardware_timer/timer.c \
+	src/rp2_common/hardware_uart/uart.c \
+	src/rp2_common/hardware_watchdog/watchdog.c \
+	src/rp2_common/hardware_xosc/xosc.c \
+	src/rp2_common/pico_bootrom/bootrom.c \
+	src/rp2_common/pico_double/double_init_rom.c \
+	src/rp2_common/pico_fix/rp2040_usb_device_enumeration/rp2040_usb_device_enumeration.c \
+	src/rp2_common/pico_float/float_init_rom.c \
+	src/rp2_common/pico_float/float_math.c \
+	src/rp2_common/pico_multicore/multicore.c \
+	src/rp2_common/pico_platform/platform.c \
+	src/rp2_common/pico_printf/printf.c \
+	src/rp2_common/pico_runtime/runtime.c \
+	src/rp2_common/pico_stdio/stdio.c \
+
+SRC_SDK := $(addprefix sdk/, $(SRC_SDK))
+
+SRC_C += \
+	boards/$(BOARD)/board.c \
+	boards/$(BOARD)/pins.c \
+	bindings/rp2pio/StateMachine.c \
+	bindings/rp2pio/__init__.c \
+	common-hal/rp2pio/StateMachine.c \
+	common-hal/rp2pio/__init__.c \
+	background.c \
+	peripherals/pins.c \
+	fatfs_port.c \
+	lib/libc/string0.c \
+	lib/mp-readline/readline.c \
+	lib/oofatfs/ff.c \
+	lib/oofatfs/option/ccsbcs.c \
+	lib/timeutils/timeutils.c \
+	lib/tinyusb/src/portable/raspberrypi/rp2040/dcd_rp2040.c \
+	lib/tinyusb/src/portable/raspberrypi/rp2040/rp2040_usb.c \
+	lib/utils/buffer_helper.c \
+	lib/utils/context_manager_helpers.c \
+	lib/utils/interrupt_char.c \
+	lib/utils/pyexec.c \
+	lib/utils/stdout_helpers.c \
+	lib/utils/sys_stdio_mphal.c \
+	mphalport.c \
+	supervisor/shared/memory.c \
+
+SRC_COMMON_HAL_EXPANDED = $(addprefix shared-bindings/, $(SRC_COMMON_HAL)) \
+                          $(addprefix shared-bindings/, $(SRC_BINDINGS_ENUMS)) \
+                          $(addprefix common-hal/, $(SRC_COMMON_HAL))
+
+SRC_SHARED_MODULE_EXPANDED = $(addprefix shared-bindings/, $(SRC_SHARED_MODULE)) \
+                             $(addprefix shared-module/, $(SRC_SHARED_MODULE)) \
+                             $(addprefix shared-module/, $(SRC_SHARED_MODULE_INTERNAL))
+
+# There may be duplicates between SRC_COMMON_HAL_EXPANDED and SRC_SHARED_MODULE_EXPANDED,
+# because a few modules have files both in common-hal/ and shared-modules/.
+# Doing a $(sort ...) removes duplicates as part of sorting.
+SRC_COMMON_HAL_SHARED_MODULE_EXPANDED = $(sort $(SRC_COMMON_HAL_EXPANDED) $(SRC_SHARED_MODULE_EXPANDED))
+
+SRC_S = supervisor/$(CHIP_FAMILY)_cpu.s
+SRC_S_UPPER = bs2_default_padded_checksummed.S \
+              sdk/src/rp2_common/hardware_divider/divider.S \
+              sdk/src/rp2_common/hardware_irq/irq_handler_chain.S \
+              sdk/src/rp2_common/pico_bit_ops/bit_ops_aeabi.S \
+              sdk/src/rp2_common/pico_double/double_aeabi.S \
+              sdk/src/rp2_common/pico_double/double_v1_rom_shim.S \
+              sdk/src/rp2_common/pico_divider/divider.S \
+              sdk/src/rp2_common/pico_float/float_aeabi.S \
+              sdk/src/rp2_common/pico_float/float_v1_rom_shim.S \
+              sdk/src/rp2_common/pico_int64_ops/pico_int64_ops_aeabi.S \
+              sdk/src/rp2_common/pico_mem_ops/mem_ops_aeabi.S \
+              sdk/src/rp2_common/pico_standard_link/crt0.S \
+
+OBJ = $(PY_O) $(SUPERVISOR_O) $(addprefix $(BUILD)/, $(SRC_C:.c=.o))
+OBJ += $(addprefix $(BUILD)/, $(SRC_SDK:.c=.o))
+OBJ += $(addprefix $(BUILD)/, $(SRC_COMMON_HAL_SHARED_MODULE_EXPANDED:.c=.o))
+ifeq ($(INTERNAL_LIBM),1)
+OBJ += $(addprefix $(BUILD)/, $(SRC_LIBM:.c=.o))
+endif
+OBJ += $(addprefix $(BUILD)/, $(SRC_S:.s=.o))
+OBJ += $(addprefix $(BUILD)/, $(SRC_S_UPPER:.S=.o))
+OBJ += $(addprefix $(BUILD)/, $(SRC_MOD:.c=.o))
+
+
+SRC_QSTR += $(SRC_C) $(SRC_SUPERVISOR) $(SRC_COMMON_HAL_EXPANDED) $(SRC_SHARED_MODULE_EXPANDED)
+
+all: $(BUILD)/firmware.uf2
+
+$(BUILD)/firmware.elf: $(OBJ) link.ld
+	$(STEPECHO) "LINK $@"
+	$(Q)$(CC) -o $@ $(LDFLAGS) $(OBJ)
+	$(Q)$(SIZE) $@ | $(PYTHON3) $(TOP)/tools/build_memory_info.py link.ld
+
+$(BUILD)/firmware.bin: $(BUILD)/firmware.elf
+	$(STEPECHO) "Create $@"
+	$(Q)$(OBJCOPY) -O binary $^ $@
+
+$(BUILD)/firmware.uf2: $(BUILD)/firmware.bin
+	$(STEPECHO) "Create $@"
+	$(Q)$(PYTHON3) $(TOP)/tools/uf2/utils/uf2conv.py -f 0xe48bff56 -b 0x10000000 -c -o $@ $^
+
+include $(TOP)/py/mkrules.mk
+
+# Print out the value of a make variable.
+# https://stackoverflow.com/questions/16467718/how-to-print-out-a-variable-in-makefile
+print-%:
+	@echo $* = $($*)
diff --git a/ports/raspberrypi/README.rst b/ports/raspberrypi/README.rst
new file mode 100644
index 000000000..d6ad9b333
--- /dev/null
+++ b/ports/raspberrypi/README.rst
@@ -0,0 +1,18 @@
+RP2040
+==================
+
+This port supports many development boards that utilize RP2040 chips. See
+https://circuitpython.org/downloads for all supported boards.
+
+
+Building
+--------
+
+For build instructions see this guide: https://learn.adafruit.com/building-circuitpython/
+
+
+Port Specific modules
+---------------------
+
+.. toctree::
+    ../../shared-bindings/rp2pio/index
diff --git a/ports/raspberrypi/background.c b/ports/raspberrypi/background.c
new file mode 100644
index 000000000..c85b83b41
--- /dev/null
+++ b/ports/raspberrypi/background.c
@@ -0,0 +1,44 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "background.h"
+
+#include "supervisor/filesystem.h"
+#include "supervisor/shared/tick.h"
+#include "supervisor/usb.h"
+
+#include "py/runtime.h"
+#include "shared-module/network/__init__.h"
+#include "supervisor/shared/stack.h"
+#include "supervisor/port.h"
+
+#if CIRCUITPY_DISPLAYIO
+#include "shared-module/displayio/__init__.h"
+#endif
+
+void port_start_background_task(void) {}
+void port_finish_background_task(void) {}
+
+void port_background_task(void) {}
diff --git a/ports/raspberrypi/background.h b/ports/raspberrypi/background.h
new file mode 100644
index 000000000..c8e23e2a5
--- /dev/null
+++ b/ports/raspberrypi/background.h
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_BACKGROUND_H
+#define MICROPY_INCLUDED_RASPBERRYPI_BACKGROUND_H
+
+#include <stdbool.h>
+
+#endif  // MICROPY_INCLUDED_RASPBERRYPI_BACKGROUND_H
diff --git a/ports/raspberrypi/bindings/rp2pio/StateMachine.c b/ports/raspberrypi/bindings/rp2pio/StateMachine.c
new file mode 100644
index 000000000..0f6f84a56
--- /dev/null
+++ b/ports/raspberrypi/bindings/rp2pio/StateMachine.c
@@ -0,0 +1,449 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+// This file contains all of the Python API definitions for the
+// rp2pio.StateMachine class.
+
+#include <string.h>
+
+#include "shared-bindings/microcontroller/Pin.h"
+#include "bindings/rp2pio/StateMachine.h"
+#include "shared-bindings/util.h"
+
+#include "lib/utils/buffer_helper.h"
+#include "lib/utils/context_manager_helpers.h"
+#include "lib/utils/interrupt_char.h"
+#include "py/mperrno.h"
+#include "py/objproperty.h"
+#include "py/runtime.h"
+#include "supervisor/shared/translate.h"
+
+
+//| class StateMachine:
+//|     """A single PIO StateMachine
+//|
+//|     The programmable I/O peripheral on the RP2 series of microcontrollers is
+//|     unique. It is a collection of generic state machines that can be
+//|     used for a variety of protocols. State machines may be independent or
+//|     coordinated. Program memory and IRQs are shared between the state machines
+//|     in a particular PIO instance. They are independent otherwise.
+//|
+//|     This class is designed to facilitate sharing of PIO resources. By default,
+//|     it is assumed that the state machine is used on its own and can be placed
+//|     in either PIO. State machines with the same program will be placed in the
+//|     same PIO if possible. To ensure multiple state machines share a PIO use
+//|     the ``colocate`` kwarg during construction and create them one after another."""
+//|
+//|     def __init__(self,
+//|                  program: ReadableBuffer,
+//|                  frequency: int,
+//|                  *,
+//|                  init: Optional[ReadableBuffer] = None,
+//|                  first_out_pin: Optional[microcontroller.Pin] = None,
+//|                  out_pin_count: int = 1,
+//|                  first_in_pin: Optional[microcontroller.Pin] = None,
+//|                  in_pin_count: int = 1,
+//|                  first_set_pin: Optional[microcontroller.Pin] = None,
+//|                  set_pin_count: int = 1,
+//|                  first_sideset_pin: Optional[microcontroller.Pin] = None,
+//|                  sideset_pin_count: int = 1,
+//|                  exclusive_pin_use: bool = True,
+//|                  auto_pull: bool = False,
+//|                  pull_threshold : int = 32,
+//|                  out_shift_right : bool = True,
+//|                  auto_push: bool = False,
+//|                  push_threshold : int = 32,
+//|                  in_shift_right : bool = True) -> None:
+// //|                  colocate: Union[int, StateMachine, None] = None
+//|
+//|         """Construct a StateMachine object on the given pins with the given program.
+//|
+//|         :param ReadableBuffer program: the program to run with the state machine
+//|         :param int frequency: the target clock frequency of the state machine. Actual may be less.
+//|         :param ReadableBuffer init: a program to run once at start up. This is run after program
+//|              is started so instructions may be intermingled
+//|         :param ~microcontroller.Pin first_out_pin: the first pin to use with the OUT instruction
+//|         :param int out_pin_count: the count of consecutive pins to use with OUT starting at first_out_pin
+//|         :param ~microcontroller.Pin first_in_pin: the first pin to use with the IN instruction
+//|         :param int in_pin_count: the count of consecutive pins to use with IN starting at first_in_pin
+//|         :param ~microcontroller.Pin first_set_pin: the first pin to use with the SET instruction
+//|         :param int set_pin_count: the count of consecutive pins to use with SET starting at first_set_pin
+//|         :param ~microcontroller.Pin first_sideset_pin: the first pin to use with a side set
+//|         :param int sideset_pin_count: the count of consecutive pins to use with a side set starting at first_sideset_pin
+//|         :param bool exclusive_pin_use: When True, do not share any pins with other state machines. Pins are never shared with other peripherals
+//|         :param bool auto_pull: When True, automatically load data from the tx FIFO into the
+//|             output shift register (OSR) when an OUT instruction shifts more than pull_threshold bits
+//|         :param int pull_threshold: Number of bits to shift before loading a new value into the OSR from the tx FIFO
+//|         :param bool out_shift_right: When True, data is shifted out the right side (LSB) of the
+//|             OSR. It is shifted out the left (MSB) otherwise. NOTE! This impacts data alignment
+//|             when the number of bytes is not a power of two (1, 2 or 4 bytes).
+//|         :param bool auto_push: When True, automatically save data from input shift register
+//|              (ISR) into the rx FIFO when an IN instruction shifts more than push_threshold bits
+//|         :param int push_threshold: Number of bits to shift before saving the ISR value to the RX FIFO
+//|         :param bool in_shift_right: When True, data is shifted into the right side (LSB) of the
+//|             ISR. It is shifted into the left (MSB) otherwise. NOTE! This impacts data alignment
+//|             when the number of bytes is not a power of two (1, 2 or 4 bytes)."""
+//|         ...
+//|
+
+STATIC mp_obj_t rp2pio_statemachine_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    rp2pio_statemachine_obj_t *self = m_new_obj(rp2pio_statemachine_obj_t);
+    self->base.type = &rp2pio_statemachine_type;
+    enum { ARG_program, ARG_frequency, ARG_init,
+           ARG_first_out_pin, ARG_out_pin_count,
+           ARG_first_in_pin, ARG_in_pin_count,
+           ARG_first_set_pin, ARG_set_pin_count,
+           ARG_first_sideset_pin, ARG_sideset_pin_count,
+           ARG_exclusive_pin_use,
+           ARG_auto_pull, ARG_pull_threshold, ARG_out_shift_right,
+           ARG_auto_push, ARG_push_threshold, ARG_in_shift_right};
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_program, MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_frequency, MP_ARG_REQUIRED | MP_ARG_INT },
+        { MP_QSTR_init, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
+        { MP_QSTR_first_out_pin, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
+        { MP_QSTR_out_pin_count, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1} },
+        { MP_QSTR_first_in_pin, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
+        { MP_QSTR_in_pin_count, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1} },
+        { MP_QSTR_first_set_pin, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
+        { MP_QSTR_set_pin_count, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1} },
+        { MP_QSTR_first_sideset_pin, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
+        { MP_QSTR_sideset_pin_count, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1} },
+        { MP_QSTR_exclusive_pin_use, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = true} },
+        { MP_QSTR_auto_pull, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
+        { MP_QSTR_pull_threshold, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 32} },
+        { MP_QSTR_out_shift_right, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = true} },
+        { MP_QSTR_auto_push, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
+        { MP_QSTR_push_threshold, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 32} },
+        { MP_QSTR_in_shift_right, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = true} },
+    };
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    mp_buffer_info_t bufinfo;
+    mp_get_buffer_raise(args[ARG_program].u_obj, &bufinfo, MP_BUFFER_READ);
+
+    mp_buffer_info_t init_bufinfo;
+    init_bufinfo.len = 0;
+    mp_get_buffer(args[ARG_init].u_obj, &init_bufinfo, MP_BUFFER_READ);
+
+    // We don't validate pin in use here because we may be ok sharing them within a PIO.
+    mcu_pin_obj_t *first_out_pin = validate_obj_is_pin_or_none(args[ARG_first_out_pin].u_obj);
+    if (args[ARG_out_pin_count].u_int < 1) {
+        mp_raise_ValueError(translate("Pin count must be at least 1"));
+    }
+    mcu_pin_obj_t *first_in_pin = validate_obj_is_pin_or_none(args[ARG_first_in_pin].u_obj);
+    if (args[ARG_in_pin_count].u_int < 1) {
+        mp_raise_ValueError(translate("Pin count must be at least 1"));
+    }
+    mcu_pin_obj_t *first_set_pin = validate_obj_is_pin_or_none(args[ARG_first_set_pin].u_obj);
+    if (args[ARG_set_pin_count].u_int < 1) {
+        mp_raise_ValueError(translate("Pin count must be at least 1"));
+    }
+    if (args[ARG_set_pin_count].u_int > 5) {
+        mp_raise_ValueError(translate("Set pin count must be between 1 and 5"));
+    }
+    mcu_pin_obj_t *first_sideset_pin = validate_obj_is_pin_or_none(args[ARG_first_sideset_pin].u_obj);
+    if (args[ARG_sideset_pin_count].u_int < 1) {
+        mp_raise_ValueError(translate("Pin count must be at least 1"));
+    }
+    if (args[ARG_sideset_pin_count].u_int > 5) {
+        mp_raise_ValueError(translate("Side set pin count must be between 1 and 5"));
+    }
+
+    mp_int_t pull_threshold = args[ARG_pull_threshold].u_int;
+    mp_int_t push_threshold = args[ARG_push_threshold].u_int;
+    if (pull_threshold < 1 || pull_threshold > 32) {
+        mp_raise_ValueError(translate("pull_threshold must be between 1 and 32"));
+    }
+    if (push_threshold < 1 || push_threshold > 32) {
+        mp_raise_ValueError(translate("push_threshold must be between 1 and 32"));
+    }
+
+    if (bufinfo.len < 2) {
+        mp_raise_ValueError(translate("Program must contain at least one 16-bit instruction."));
+    }
+    if (bufinfo.len % 2 != 0) {
+        mp_raise_ValueError(translate("Program size invalid"));
+    }
+    if (bufinfo.len > 32) {
+        mp_raise_ValueError(translate("Program too large"));
+    }
+
+    if (init_bufinfo.len % 2 != 0) {
+        mp_raise_ValueError(translate("Init program size invalid"));
+    }
+
+    common_hal_rp2pio_statemachine_construct(self,
+        bufinfo.buf, bufinfo.len / 2,
+        args[ARG_frequency].u_int,
+        init_bufinfo.buf, init_bufinfo.len / 2,
+        first_out_pin, args[ARG_out_pin_count].u_int,
+        first_in_pin, args[ARG_in_pin_count].u_int,
+        first_set_pin, args[ARG_set_pin_count].u_int,
+        first_sideset_pin, args[ARG_sideset_pin_count].u_int,
+        args[ARG_exclusive_pin_use].u_bool,
+        args[ARG_auto_pull].u_bool, pull_threshold, args[ARG_out_shift_right].u_bool,
+        args[ARG_auto_push].u_bool, push_threshold, args[ARG_in_shift_right].u_bool);
+    return MP_OBJ_FROM_PTR(self);
+}
+
+//|     def deinit(self) -> None:
+//|         """Turn off the state machine and release its resources."""
+//|         ...
+//|
+STATIC mp_obj_t rp2pio_statemachine_obj_deinit(mp_obj_t self_in) {
+    rp2pio_statemachine_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    common_hal_rp2pio_statemachine_deinit(self);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_1(rp2pio_statemachine_deinit_obj, rp2pio_statemachine_obj_deinit);
+
+//|     def __enter__(self) -> StateMachine:
+//|         """No-op used by Context Managers.
+//|         Provided by context manager helper."""
+//|         ...
+//|
+
+//|     def __exit__(self) -> None:
+//|         """Automatically deinitializes the hardware when exiting a context. See
+//|         :ref:`lifetime-and-contextmanagers` for more info."""
+//|         ...
+//|
+STATIC mp_obj_t rp2pio_statemachine_obj___exit__(size_t n_args, const mp_obj_t *args) {
+    (void)n_args;
+    common_hal_rp2pio_statemachine_deinit(args[0]);
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(rp2pio_statemachine_obj___exit___obj, 4, 4, rp2pio_statemachine_obj___exit__);
+
+
+STATIC void check_for_deinit(rp2pio_statemachine_obj_t *self) {
+    if (common_hal_rp2pio_statemachine_deinited(self)) {
+        raise_deinited_error();
+    }
+}
+
+// // |     def restart(self, *other_state_machines) -> None:
+// // |         """Restarts this state machine and any others given. They must share
+// // |            an underlying PIO. An exception will be raised otherwise."""
+// // |         ...
+// // |
+
+//|     def write(self, buffer: ReadableBuffer, *, start: int = 0, end: Optional[int] = None) -> None:
+//|         """Write the data contained in ``buffer`` to the state machine. If the buffer is empty, nothing happens.
+//|
+//|         :param ~_typing.ReadableBuffer buffer: Write out the data in this buffer
+//|         :param int start: Start of the slice of ``buffer`` to write out: ``buffer[start:end]``
+//|         :param int end: End of the slice; this index is not included. Defaults to ``len(buffer)``"""
+//|         ...
+//|
+
+STATIC mp_obj_t rp2pio_statemachine_write(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    enum { ARG_buffer, ARG_start, ARG_end };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_buffer,     MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
+        { MP_QSTR_start,      MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_end,        MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = INT_MAX} },
+    };
+    rp2pio_statemachine_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
+    check_for_deinit(self);
+    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+    mp_buffer_info_t bufinfo;
+    mp_get_buffer_raise(args[ARG_buffer].u_obj, &bufinfo, MP_BUFFER_READ);
+    int32_t start = args[ARG_start].u_int;
+    size_t length = bufinfo.len;
+    normalize_buffer_bounds(&start, args[ARG_end].u_int, &length);
+
+    if (length == 0) {
+        return mp_const_none;
+    }
+
+    bool ok = common_hal_rp2pio_statemachine_write(self, ((uint8_t*)bufinfo.buf) + start, length);
+    if (mp_hal_is_interrupted()) {
+        return mp_const_none;
+    }
+    if (!ok) {
+        mp_raise_OSError(MP_EIO);
+    }
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_KW(rp2pio_statemachine_write_obj, 2, rp2pio_statemachine_write);
+
+
+// // |     def readinto(self, buffer: WriteableBuffer, *, start: int = 0, end: Optional[int] = None) -> None:
+// // |         """Read into ``buffer``. If the number of bytes to read is 0, nothing happens.
+// // |
+// // |         :param ~_typing.WriteableBuffer buffer: Read data into this buffer
+// // |         :param int start: Start of the slice of ``buffer`` to read into: ``buffer[start:end]``
+// // |         :param int end: End of the slice; this index is not included. Defaults to ``len(buffer)``
+// // |         :param int write_value: Value to write while reading. (Usually ignored.)"""
+// // |         ...
+// // |
+
+// STATIC mp_obj_t rp2pio_statemachine_readinto(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+//     enum { ARG_buffer, ARG_start, ARG_end, ARG_write_value };
+//     static const mp_arg_t allowed_args[] = {
+//         { MP_QSTR_buffer,     MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
+//         { MP_QSTR_start,      MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+//         { MP_QSTR_end,        MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = INT_MAX} },
+//         { MP_QSTR_write_value,MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+//     };
+//     rp2pio_statemachine_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
+//     check_for_deinit(self);
+//     check_lock(self);
+//     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+//     mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+//     mp_buffer_info_t bufinfo;
+//     mp_get_buffer_raise(args[ARG_buffer].u_obj, &bufinfo, MP_BUFFER_WRITE);
+//     int32_t start = args[ARG_start].u_int;
+//     size_t length = bufinfo.len;
+//     normalize_buffer_bounds(&start, args[ARG_end].u_int, &length);
+
+//     if (length == 0) {
+//         return mp_const_none;
+//     }
+
+//     bool ok = common_hal_rp2pio_statemachine_read(self, ((uint8_t*)bufinfo.buf) + start, length, args[ARG_write_value].u_int);
+//     if (!ok) {
+//         mp_raise_OSError(MP_EIO);
+//     }
+//     return mp_const_none;
+// }
+// MP_DEFINE_CONST_FUN_OBJ_KW(rp2pio_statemachine_readinto_obj, 2, rp2pio_statemachine_readinto);
+
+// //|     def write_readinto(self, buffer_out: ReadableBuffer, buffer_in: WriteableBuffer, *, out_start: int = 0, out_end: Optional[int] = None, in_start: int = 0, in_end: Optional[int] = None) -> None:
+// //|         """Write out the data in ``buffer_out`` while simultaneously reading data into ``buffer_in``.
+// //|         The SPI object must be locked.
+// //|         The lengths of the slices defined by ``buffer_out[out_start:out_end]`` and ``buffer_in[in_start:in_end]``
+// //|         must be equal.
+// //|         If buffer slice lengths are both 0, nothing happens.
+// //|
+// //|         :param ~_typing.ReadableBuffer buffer_out: Write out the data in this buffer
+// //|         :param ~_typing.WriteableBuffer buffer_in: Read data into this buffer
+// //|         :param int out_start: Start of the slice of buffer_out to write out: ``buffer_out[out_start:out_end]``
+// //|         :param int out_end: End of the slice; this index is not included. Defaults to ``len(buffer_out)``
+// //|         :param int in_start: Start of the slice of ``buffer_in`` to read into: ``buffer_in[in_start:in_end]``
+// //|         :param int in_end: End of the slice; this index is not included. Defaults to ``len(buffer_in)``"""
+// //|         ...
+// //|
+
+// STATIC mp_obj_t rp2pio_statemachine_write_readinto(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+//     enum { ARG_buffer_out, ARG_buffer_in, ARG_out_start, ARG_out_end, ARG_in_start, ARG_in_end };
+//     static const mp_arg_t allowed_args[] = {
+//         { MP_QSTR_buffer_out,    MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
+//         { MP_QSTR_buffer_in,     MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
+//         { MP_QSTR_out_start,     MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+//         { MP_QSTR_out_end,       MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = INT_MAX} },
+//         { MP_QSTR_in_start,      MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+//         { MP_QSTR_in_end,        MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = INT_MAX} },
+//     };
+//     rp2pio_statemachine_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
+//     check_for_deinit(self);
+//     check_lock(self);
+//     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+//     mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+
+//     mp_buffer_info_t buf_out_info;
+//     mp_get_buffer_raise(args[ARG_buffer_out].u_obj, &buf_out_info, MP_BUFFER_READ);
+//     int32_t out_start = args[ARG_out_start].u_int;
+//     size_t out_length = buf_out_info.len;
+//     normalize_buffer_bounds(&out_start, args[ARG_out_end].u_int, &out_length);
+
+//     mp_buffer_info_t buf_in_info;
+//     mp_get_buffer_raise(args[ARG_buffer_in].u_obj, &buf_in_info, MP_BUFFER_WRITE);
+//     int32_t in_start = args[ARG_in_start].u_int;
+//     size_t in_length = buf_in_info.len;
+//     normalize_buffer_bounds(&in_start, args[ARG_in_end].u_int, &in_length);
+
+//     if (out_length != in_length) {
+//         mp_raise_ValueError(translate("buffer slices must be of equal length"));
+//     }
+
+//     if (out_length == 0) {
+//         return mp_const_none;
+//     }
+
+//     bool ok = common_hal_rp2pio_statemachine_transfer(self,
+//                                             ((uint8_t*)buf_out_info.buf) + out_start,
+//                                             ((uint8_t*)buf_in_info.buf) + in_start,
+//                                             out_length);
+//     if (!ok) {
+//         mp_raise_OSError(MP_EIO);
+//     }
+//     return mp_const_none;
+// }
+// MP_DEFINE_CONST_FUN_OBJ_KW(rp2pio_statemachine_write_readinto_obj, 2, rp2pio_statemachine_write_readinto);
+
+//|     frequency: int
+//|     """The actual state machine frequency. This may not match the frequency requested
+//|     due to internal limitations."""
+//|
+
+STATIC mp_obj_t rp2pio_statemachine_obj_get_frequency(mp_obj_t self_in) {
+    rp2pio_statemachine_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    check_for_deinit(self);
+    return MP_OBJ_NEW_SMALL_INT(common_hal_rp2pio_statemachine_get_frequency(self));
+}
+MP_DEFINE_CONST_FUN_OBJ_1(rp2pio_statemachine_get_frequency_obj, rp2pio_statemachine_obj_get_frequency);
+
+const mp_obj_property_t rp2pio_statemachine_frequency_obj = {
+    .base.type = &mp_type_property,
+    .proxy = {(mp_obj_t)&rp2pio_statemachine_get_frequency_obj,
+              (mp_obj_t)&mp_const_none_obj,
+              (mp_obj_t)&mp_const_none_obj},
+};
+
+STATIC const mp_rom_map_elem_t rp2pio_statemachine_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&rp2pio_statemachine_deinit_obj) },
+    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&rp2pio_statemachine_obj___exit___obj) },
+
+//    { MP_ROM_QSTR(MP_QSTR_restart), MP_ROM_PTR(&rp2pio_statemachine_configure_obj) },
+
+//    { MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&rp2pio_statemachine_readinto_obj) },
+    { MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&rp2pio_statemachine_write_obj) },
+//     { MP_ROM_QSTR(MP_QSTR_write_readinto), MP_ROM_PTR(&rp2pio_statemachine_write_readinto_obj) },
+    { MP_ROM_QSTR(MP_QSTR_frequency), MP_ROM_PTR(&rp2pio_statemachine_frequency_obj) }
+};
+STATIC MP_DEFINE_CONST_DICT(rp2pio_statemachine_locals_dict, rp2pio_statemachine_locals_dict_table);
+
+const mp_obj_type_t rp2pio_statemachine_type = {
+   { &mp_type_type },
+   .name = MP_QSTR_StateMachine,
+   .make_new = rp2pio_statemachine_make_new,
+   .locals_dict = (mp_obj_dict_t*)&rp2pio_statemachine_locals_dict,
+};
+
+rp2pio_statemachine_obj_t *validate_obj_is_statemachine(mp_obj_t obj) {
+    if (!MP_OBJ_IS_TYPE(obj, &rp2pio_statemachine_type)) {
+        mp_raise_TypeError_varg(translate("Expected a %q"), rp2pio_statemachine_type.name);
+    }
+    return MP_OBJ_TO_PTR(obj);
+}
diff --git a/ports/raspberrypi/bindings/rp2pio/StateMachine.h b/ports/raspberrypi/bindings/rp2pio/StateMachine.h
new file mode 100644
index 000000000..5ff20a75b
--- /dev/null
+++ b/ports/raspberrypi/bindings/rp2pio/StateMachine.h
@@ -0,0 +1,71 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_BINDINGS_RP2PIO_STATEMACHINE_H
+#define MICROPY_INCLUDED_RASPBERRYPI_BINDINGS_RP2PIO_STATEMACHINE_H
+
+#include "py/obj.h"
+
+#include "common-hal/microcontroller/Pin.h"
+#include "common-hal/rp2pio/StateMachine.h"
+
+// Type object used in Python. Should be shared between ports.
+extern const mp_obj_type_t rp2pio_statemachine_type;
+
+// Construct an underlying SPI object.
+extern void common_hal_rp2pio_statemachine_construct(rp2pio_statemachine_obj_t *self,
+    const uint16_t* program, size_t program_len,
+    size_t frequency,
+    const uint16_t* init, size_t init_len,
+    const mcu_pin_obj_t * first_out_pin, uint8_t out_pin_count,
+    const mcu_pin_obj_t * first_in_pin, uint8_t in_pin_count,
+    const mcu_pin_obj_t * first_set_pin, uint8_t set_pin_count,
+    const mcu_pin_obj_t * first_sideset_pin, uint8_t sideset_pin_count,
+    bool exclusive_pin_use,
+    bool auto_pull, uint8_t pull_threshold, bool out_shift_right,
+    bool auto_push, uint8_t push_threshold, bool in_shift_right);
+
+extern void common_hal_rp2pio_statemachine_deinit(rp2pio_statemachine_obj_t *self);
+extern bool common_hal_rp2pio_statemachine_deinited(rp2pio_statemachine_obj_t *self);
+
+// Writes out the given data.
+extern bool common_hal_rp2pio_statemachine_write(rp2pio_statemachine_obj_t *self, const uint8_t *data, size_t len);
+
+// // Reads in len bytes while outputting zeroes.
+// extern bool common_hal_rp2pio_statemachine_read(rp2pio_statemachine_obj_t *self, uint8_t *data, size_t len, uint8_t write_value);
+
+// // Reads and write len bytes simultaneously.
+// extern bool common_hal_rp2pio_statemachine_transfer(rp2pio_statemachine_obj_t *self,
+//                                           const uint8_t *data_out, size_t out_len,
+//                                           uint8_t *data_in, size_t in_len);
+
+// Return actual SPI bus frequency.
+uint32_t common_hal_rp2pio_statemachine_get_frequency(rp2pio_statemachine_obj_t* self);
+
+// This is used by the supervisor to claim SPI devices indefinitely.
+// extern void common_hal_rp2pio_statemachine_never_reset(rp2pio_statemachine_obj_t *self);
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_BINDINGS_RP2PIO_STATEMACHINE_H
diff --git a/ports/raspberrypi/bindings/rp2pio/__init__.c b/ports/raspberrypi/bindings/rp2pio/__init__.c
new file mode 100644
index 000000000..dd5808cd5
--- /dev/null
+++ b/ports/raspberrypi/bindings/rp2pio/__init__.c
@@ -0,0 +1,45 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/obj.h"
+#include "py/runtime.h"
+
+#include "bindings/rp2pio/StateMachine.h"
+
+//| """Hardware interface to RP2 series' programmable IO (PIO) peripheral."""
+//|
+
+STATIC const mp_rom_map_elem_t rp2pio_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_rp2pio) },
+    { MP_ROM_QSTR(MP_QSTR_StateMachine),  MP_ROM_PTR(&rp2pio_statemachine_type) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(rp2pio_module_globals, rp2pio_module_globals_table);
+
+const mp_obj_module_t rp2pio_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&rp2pio_module_globals,
+};
diff --git a/ports/raspberrypi/boards/adafruit_feather_rp2040/board.c b/ports/raspberrypi/boards/adafruit_feather_rp2040/board.c
new file mode 100644
index 000000000..8686f6d0c
--- /dev/null
+++ b/ports/raspberrypi/boards/adafruit_feather_rp2040/board.c
@@ -0,0 +1,44 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "supervisor/board.h"
+
+#include "shared-bindings/microcontroller/Pin.h"
+#include "src/rp2_common/hardware_gpio/include/hardware/gpio.h"
+
+void board_init(void) {
+    common_hal_never_reset_pin(&pin_GPIO17);
+    gpio_init(17);
+    gpio_set_dir(17, GPIO_OUT);
+    gpio_put(17, true);
+}
+
+bool board_requests_safe_mode(void) {
+    return false;
+}
+
+void reset_board(void) {
+}
diff --git a/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.h b/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.h
new file mode 100644
index 000000000..6a2d063d7
--- /dev/null
+++ b/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.h
@@ -0,0 +1,14 @@
+#define MICROPY_HW_BOARD_NAME "Adafruit Feather RP2040"
+#define MICROPY_HW_MCU_NAME "rp2040"
+
+#define MICROPY_HW_NEOPIXEL (&pin_GPIO16)
+
+#define DEFAULT_I2C_BUS_SCL (&pin_GPIO3)
+#define DEFAULT_I2C_BUS_SDA (&pin_GPIO2)
+
+#define DEFAULT_SPI_BUS_SCK (&pin_GPIO18)
+#define DEFAULT_SPI_BUS_MOSI (&pin_GPIO19)
+#define DEFAULT_SPI_BUS_MISO (&pin_GPIO20)
+
+// #define DEFAULT_UART_BUS_RX (&pin_PA11)
+// #define DEFAULT_UART_BUS_TX (&pin_PA10)
diff --git a/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.mk b/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.mk
new file mode 100644
index 000000000..f4106b94a
--- /dev/null
+++ b/ports/raspberrypi/boards/adafruit_feather_rp2040/mpconfigboard.mk
@@ -0,0 +1,9 @@
+USB_VID = 0x239A
+USB_PID = 0x80F2
+USB_PRODUCT = "Feather RP2040"
+USB_MANUFACTURER = "Adafruit"
+
+CHIP_VARIANT = RP2040
+CHIP_FAMILY = rp2
+
+INTERNAL_FLASH_FILESYSTEM = 1
diff --git a/ports/raspberrypi/boards/adafruit_feather_rp2040/pins.c b/ports/raspberrypi/boards/adafruit_feather_rp2040/pins.c
new file mode 100644
index 000000000..1617ac865
--- /dev/null
+++ b/ports/raspberrypi/boards/adafruit_feather_rp2040/pins.c
@@ -0,0 +1,36 @@
+#include "shared-bindings/board/__init__.h"
+
+STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_GPIO26) },
+    { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_GPIO27) },
+    { MP_ROM_QSTR(MP_QSTR_A2), MP_ROM_PTR(&pin_GPIO28) },
+    { MP_ROM_QSTR(MP_QSTR_A3), MP_ROM_PTR(&pin_GPIO29) },
+    { MP_ROM_QSTR(MP_QSTR_D24), MP_ROM_PTR(&pin_GPIO24) },
+    { MP_ROM_QSTR(MP_QSTR_D25), MP_ROM_PTR(&pin_GPIO25) },
+    { MP_ROM_QSTR(MP_QSTR_SCK), MP_ROM_PTR(&pin_GPIO18) },
+    { MP_ROM_QSTR(MP_QSTR_MOSI), MP_ROM_PTR(&pin_GPIO19) },
+    { MP_ROM_QSTR(MP_QSTR_MISO), MP_ROM_PTR(&pin_GPIO20) },
+    { MP_ROM_QSTR(MP_QSTR_D0), MP_ROM_PTR(&pin_GPIO1) },
+    { MP_ROM_QSTR(MP_QSTR_RX), MP_ROM_PTR(&pin_GPIO1) },
+    { MP_ROM_QSTR(MP_QSTR_D1), MP_ROM_PTR(&pin_GPIO0) },
+    { MP_ROM_QSTR(MP_QSTR_TX), MP_ROM_PTR(&pin_GPIO0) },
+    { MP_ROM_QSTR(MP_QSTR_D4), MP_ROM_PTR(&pin_GPIO4) },
+
+    { MP_ROM_QSTR(MP_QSTR_SDA), MP_ROM_PTR(&pin_GPIO2) },
+    { MP_ROM_QSTR(MP_QSTR_SCL), MP_ROM_PTR(&pin_GPIO3) },
+    { MP_ROM_QSTR(MP_QSTR_D5), MP_ROM_PTR(&pin_GPIO5) },
+    { MP_ROM_QSTR(MP_QSTR_D6), MP_ROM_PTR(&pin_GPIO6) },
+    { MP_ROM_QSTR(MP_QSTR_D9), MP_ROM_PTR(&pin_GPIO9) },
+    { MP_ROM_QSTR(MP_QSTR_D10), MP_ROM_PTR(&pin_GPIO10) },
+    { MP_ROM_QSTR(MP_QSTR_D11), MP_ROM_PTR(&pin_GPIO11) },
+    { MP_ROM_QSTR(MP_QSTR_D12), MP_ROM_PTR(&pin_GPIO12) },
+    { MP_ROM_QSTR(MP_QSTR_D13), MP_ROM_PTR(&pin_GPIO13) },
+
+    { MP_ROM_QSTR(MP_QSTR_NEOPIXEL), MP_ROM_PTR(&pin_GPIO16) },
+    { MP_ROM_QSTR(MP_QSTR_NEOPIXEL_POWER), MP_ROM_PTR(&pin_GPIO17) },
+
+    { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&board_i2c_obj) },
+    { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&board_spi_obj) },
+    // { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&board_uart_obj) },
+};
+MP_DEFINE_CONST_DICT(board_module_globals, board_global_dict_table);
diff --git a/ports/raspberrypi/boards/raspberry_pi_pico/board.c b/ports/raspberrypi/boards/raspberry_pi_pico/board.c
new file mode 100644
index 000000000..80ec5de32
--- /dev/null
+++ b/ports/raspberrypi/boards/raspberry_pi_pico/board.c
@@ -0,0 +1,38 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "supervisor/board.h"
+
+void board_init(void)
+{
+}
+
+bool board_requests_safe_mode(void) {
+    return false;
+}
+
+void reset_board(void) {
+}
diff --git a/ports/raspberrypi/boards/raspberry_pi_pico/mpconfigboard.h b/ports/raspberrypi/boards/raspberry_pi_pico/mpconfigboard.h
new file mode 100644
index 000000000..4b0a22028
--- /dev/null
+++ b/ports/raspberrypi/boards/raspberry_pi_pico/mpconfigboard.h
@@ -0,0 +1,15 @@
+// LEDs
+// #define MICROPY_HW_LED_STATUS   (&pin_PA17)
+
+#define MICROPY_HW_BOARD_NAME "Raspberry Pi Pico"
+#define MICROPY_HW_MCU_NAME "rp2040"
+
+// #define DEFAULT_I2C_BUS_SCL (&pin_PA23)
+// #define DEFAULT_I2C_BUS_SDA (&pin_PA22)
+
+// #define DEFAULT_SPI_BUS_SCK (&pin_PB11)
+// #define DEFAULT_SPI_BUS_MOSI (&pin_PB10)
+// #define DEFAULT_SPI_BUS_MISO (&pin_PA12)
+
+// #define DEFAULT_UART_BUS_RX (&pin_PA11)
+// #define DEFAULT_UART_BUS_TX (&pin_PA10)
diff --git a/ports/raspberrypi/boards/raspberry_pi_pico/mpconfigboard.mk b/ports/raspberrypi/boards/raspberry_pi_pico/mpconfigboard.mk
new file mode 100644
index 000000000..69ff56fef
--- /dev/null
+++ b/ports/raspberrypi/boards/raspberry_pi_pico/mpconfigboard.mk
@@ -0,0 +1,9 @@
+USB_VID = 0x239A
+USB_PID = 0x80F4
+USB_PRODUCT = "Pico"
+USB_MANUFACTURER = "Raspberry Pi"
+
+CHIP_VARIANT = RP2040
+CHIP_FAMILY = rp2
+
+INTERNAL_FLASH_FILESYSTEM = 1
diff --git a/ports/raspberrypi/boards/raspberry_pi_pico/pins.c b/ports/raspberrypi/boards/raspberry_pi_pico/pins.c
new file mode 100644
index 000000000..38ec75c4a
--- /dev/null
+++ b/ports/raspberrypi/boards/raspberry_pi_pico/pins.c
@@ -0,0 +1,38 @@
+#include "shared-bindings/board/__init__.h"
+
+STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_GP0), MP_ROM_PTR(&pin_GPIO0) },
+    { MP_ROM_QSTR(MP_QSTR_GP1), MP_ROM_PTR(&pin_GPIO1) },
+    { MP_ROM_QSTR(MP_QSTR_GP2), MP_ROM_PTR(&pin_GPIO2) },
+    { MP_ROM_QSTR(MP_QSTR_GP3), MP_ROM_PTR(&pin_GPIO3) },
+    { MP_ROM_QSTR(MP_QSTR_GP4), MP_ROM_PTR(&pin_GPIO4) },
+    { MP_ROM_QSTR(MP_QSTR_GP5), MP_ROM_PTR(&pin_GPIO5) },
+    { MP_ROM_QSTR(MP_QSTR_GP6), MP_ROM_PTR(&pin_GPIO6) },
+    { MP_ROM_QSTR(MP_QSTR_GP7), MP_ROM_PTR(&pin_GPIO7) },
+    { MP_ROM_QSTR(MP_QSTR_GP8), MP_ROM_PTR(&pin_GPIO8) },
+    { MP_ROM_QSTR(MP_QSTR_GP9), MP_ROM_PTR(&pin_GPIO9) },
+    { MP_ROM_QSTR(MP_QSTR_GP10), MP_ROM_PTR(&pin_GPIO10) },
+    { MP_ROM_QSTR(MP_QSTR_GP11), MP_ROM_PTR(&pin_GPIO11) },
+    { MP_ROM_QSTR(MP_QSTR_GP12), MP_ROM_PTR(&pin_GPIO12) },
+    { MP_ROM_QSTR(MP_QSTR_GP13), MP_ROM_PTR(&pin_GPIO13) },
+    { MP_ROM_QSTR(MP_QSTR_GP14), MP_ROM_PTR(&pin_GPIO14) },
+    { MP_ROM_QSTR(MP_QSTR_GP16), MP_ROM_PTR(&pin_GPIO16) },
+    { MP_ROM_QSTR(MP_QSTR_GP17), MP_ROM_PTR(&pin_GPIO17) },
+    { MP_ROM_QSTR(MP_QSTR_GP18), MP_ROM_PTR(&pin_GPIO18) },
+    { MP_ROM_QSTR(MP_QSTR_GP19), MP_ROM_PTR(&pin_GPIO19) },
+    { MP_ROM_QSTR(MP_QSTR_GP20), MP_ROM_PTR(&pin_GPIO20) },
+    { MP_ROM_QSTR(MP_QSTR_GP21), MP_ROM_PTR(&pin_GPIO21) },
+    { MP_ROM_QSTR(MP_QSTR_GP22), MP_ROM_PTR(&pin_GPIO22) },
+    { MP_ROM_QSTR(MP_QSTR_LED), MP_ROM_PTR(&pin_GPIO25) },
+    { MP_ROM_QSTR(MP_QSTR_GP25), MP_ROM_PTR(&pin_GPIO25) },
+    { MP_ROM_QSTR(MP_QSTR_GP26_A0), MP_ROM_PTR(&pin_GPIO26) },
+    { MP_ROM_QSTR(MP_QSTR_GP26), MP_ROM_PTR(&pin_GPIO26) },
+    { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_GPIO26) },
+    { MP_ROM_QSTR(MP_QSTR_GP27_A1), MP_ROM_PTR(&pin_GPIO27) },
+    { MP_ROM_QSTR(MP_QSTR_GP27), MP_ROM_PTR(&pin_GPIO27) },
+    { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_GPIO27) },
+    { MP_ROM_QSTR(MP_QSTR_GP28_A2), MP_ROM_PTR(&pin_GPIO28) },
+    { MP_ROM_QSTR(MP_QSTR_GP28), MP_ROM_PTR(&pin_GPIO28) },
+    { MP_ROM_QSTR(MP_QSTR_A2), MP_ROM_PTR(&pin_GPIO28) },
+};
+MP_DEFINE_CONST_DICT(board_module_globals, board_global_dict_table);
diff --git a/ports/raspberrypi/bs2_default_padded_checksummed.S b/ports/raspberrypi/bs2_default_padded_checksummed.S
new file mode 100644
index 000000000..d77f4867c
--- /dev/null
+++ b/ports/raspberrypi/bs2_default_padded_checksummed.S
@@ -0,0 +1,20 @@
+// Padded and checksummed version of: /Users/graham/dev/mu/pico_sdk/cmake-build-debug-mu/src/rp2_common/boot_stage2/bs2_default.bin
+
+.section .boot2, "a"
+
+.byte 0x00, 0xb5, 0x2f, 0x4b, 0x21, 0x20, 0x58, 0x60, 0x98, 0x68, 0x02, 0x21, 0x88, 0x43, 0x98, 0x60
+.byte 0xd8, 0x60, 0x18, 0x61, 0x58, 0x61, 0x2b, 0x4b, 0x00, 0x21, 0x99, 0x60, 0x02, 0x21, 0x59, 0x61
+.byte 0x01, 0x21, 0xf0, 0x22, 0x99, 0x50, 0x28, 0x49, 0x19, 0x60, 0x01, 0x21, 0x99, 0x60, 0x35, 0x20
+.byte 0x00, 0xf0, 0x3e, 0xf8, 0x02, 0x22, 0x90, 0x42, 0x14, 0xd0, 0x06, 0x21, 0x19, 0x66, 0x00, 0xf0
+.byte 0x2e, 0xf8, 0x19, 0x6e, 0x01, 0x21, 0x19, 0x66, 0x00, 0x20, 0x18, 0x66, 0x1a, 0x66, 0x00, 0xf0
+.byte 0x26, 0xf8, 0x19, 0x6e, 0x19, 0x6e, 0x19, 0x6e, 0x05, 0x20, 0x00, 0xf0, 0x29, 0xf8, 0x01, 0x21
+.byte 0x08, 0x42, 0xf9, 0xd1, 0x00, 0x21, 0x99, 0x60, 0x18, 0x49, 0x19, 0x60, 0x00, 0x21, 0x59, 0x60
+.byte 0x17, 0x49, 0x18, 0x48, 0x01, 0x60, 0x01, 0x21, 0x99, 0x60, 0xeb, 0x21, 0x19, 0x66, 0xa0, 0x21
+.byte 0x19, 0x66, 0x00, 0xf0, 0x0c, 0xf8, 0x00, 0x21, 0x99, 0x60, 0x13, 0x49, 0x11, 0x48, 0x01, 0x60
+.byte 0x01, 0x21, 0x99, 0x60, 0x01, 0xbc, 0x00, 0x28, 0x00, 0xd1, 0x10, 0x48, 0x00, 0x47, 0x03, 0xb5
+.byte 0x99, 0x6a, 0x04, 0x20, 0x01, 0x42, 0xfb, 0xd0, 0x01, 0x20, 0x01, 0x42, 0xf8, 0xd1, 0x03, 0xbd
+.byte 0x02, 0xb5, 0x18, 0x66, 0x18, 0x66, 0xff, 0xf7, 0xf2, 0xff, 0x18, 0x6e, 0x18, 0x6e, 0x02, 0xbd
+.byte 0x00, 0x00, 0x02, 0x40, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x07, 0x00, 0x00, 0x03, 0x5f, 0x00
+.byte 0x21, 0x22, 0x00, 0x00, 0xf4, 0x00, 0x00, 0x18, 0x22, 0x20, 0x00, 0xa0, 0x01, 0x01, 0x00, 0x10
+.byte 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+.byte 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3e, 0x27, 0x2a, 0x60
diff --git a/ports/raspberrypi/common-hal/analogio/AnalogIn.c b/ports/raspberrypi/common-hal/analogio/AnalogIn.c
new file mode 100644
index 000000000..c51a74929
--- /dev/null
+++ b/ports/raspberrypi/common-hal/analogio/AnalogIn.c
@@ -0,0 +1,73 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "common-hal/analogio/AnalogIn.h"
+#include "py/runtime.h"
+#include "supervisor/shared/translate.h"
+
+#include "src/rp2_common/hardware_adc/include/hardware/adc.h"
+
+#define ADC_FIRST_PIN_NUMBER 26
+#define ADC_PIN_COUNT 4
+
+void common_hal_analogio_analogin_construct(analogio_analogin_obj_t *self, const mcu_pin_obj_t *pin) {
+    if (pin->number < ADC_FIRST_PIN_NUMBER || pin->number > ADC_FIRST_PIN_NUMBER + ADC_PIN_COUNT) {
+        mp_raise_ValueError(translate("Pin does not have ADC capabilities"));
+    }
+
+    adc_init();
+
+    adc_gpio_init(pin->number);
+
+    claim_pin(pin);
+    self->pin = pin;
+}
+
+bool common_hal_analogio_analogin_deinited(analogio_analogin_obj_t *self) {
+    return self->pin == NULL;
+}
+
+void common_hal_analogio_analogin_deinit(analogio_analogin_obj_t *self) {
+    if (common_hal_analogio_analogin_deinited(self)) {
+        return;
+    }
+
+    reset_pin_number(self->pin->number);
+    self->pin = NULL;
+}
+
+uint16_t common_hal_analogio_analogin_get_value(analogio_analogin_obj_t *self) {
+    adc_select_input(self->pin->number - ADC_FIRST_PIN_NUMBER);
+    uint16_t value = adc_read();
+
+    // Map value to from 12 to 16 bits
+    return (value << 4);
+}
+
+float common_hal_analogio_analogin_get_reference_voltage(analogio_analogin_obj_t *self) {
+    // The nominal VCC voltage
+    return 3.3f;
+}
diff --git a/ports/raspberrypi/common-hal/analogio/AnalogIn.h b/ports/raspberrypi/common-hal/analogio/AnalogIn.h
new file mode 100644
index 000000000..ee9976e34
--- /dev/null
+++ b/ports/raspberrypi/common-hal/analogio/AnalogIn.h
@@ -0,0 +1,41 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_ANALOGIO_ANALOGIN_H
+#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_ANALOGIO_ANALOGIN_H
+
+#include "common-hal/microcontroller/Pin.h"
+
+#include "py/obj.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    const mcu_pin_obj_t * pin;
+} analogio_analogin_obj_t;
+
+void analogin_init(void);
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_ANALOGIO_ANALOGIN_H
diff --git a/ports/raspberrypi/common-hal/analogio/AnalogOut.c b/ports/raspberrypi/common-hal/analogio/AnalogOut.c
new file mode 100644
index 000000000..adafa15d5
--- /dev/null
+++ b/ports/raspberrypi/common-hal/analogio/AnalogOut.c
@@ -0,0 +1,48 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Dan Halbert for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/analogio/AnalogOut.h"
+
+#include <stdint.h>
+#include <string.h>
+
+#include "py/mperrno.h"
+#include "py/runtime.h"
+#include "supervisor/shared/translate.h"
+
+void common_hal_analogio_analogout_construct(analogio_analogout_obj_t* self, const mcu_pin_obj_t *pin) {
+    mp_raise_RuntimeError(translate("AnalogOut functionality not supported"));
+}
+
+bool common_hal_analogio_analogout_deinited(analogio_analogout_obj_t *self) {
+    return true;
+}
+
+void common_hal_analogio_analogout_deinit(analogio_analogout_obj_t *self) {
+}
+
+void common_hal_analogio_analogout_set_value(analogio_analogout_obj_t *self, uint16_t value) {
+}
diff --git a/ports/raspberrypi/common-hal/analogio/AnalogOut.h b/ports/raspberrypi/common-hal/analogio/AnalogOut.h
new file mode 100644
index 000000000..7c7a61aa2
--- /dev/null
+++ b/ports/raspberrypi/common-hal/analogio/AnalogOut.h
@@ -0,0 +1,36 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Scott Shawcroft
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_ANALOGIO_ANALOGOUT_H
+#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_ANALOGIO_ANALOGOUT_H
+
+#include "py/obj.h"
+
+typedef struct {
+    mp_obj_base_t base;
+} analogio_analogout_obj_t;
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_ANALOGIO_ANALOGOUT_H
diff --git a/ports/raspberrypi/common-hal/analogio/__init__.c b/ports/raspberrypi/common-hal/analogio/__init__.c
new file mode 100644
index 000000000..eea58c77d
--- /dev/null
+++ b/ports/raspberrypi/common-hal/analogio/__init__.c
@@ -0,0 +1 @@
+// No analogio module functions.
diff --git a/ports/raspberrypi/common-hal/board/__init__.c b/ports/raspberrypi/common-hal/board/__init__.c
new file mode 100644
index 000000000..3c7f30df2
--- /dev/null
+++ b/ports/raspberrypi/common-hal/board/__init__.c
@@ -0,0 +1,34 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <string.h>
+
+#include "py/runtime.h"
+#include "py/mphal.h"
+#include "common-hal/microcontroller/Pin.h"
+
+// Pins aren't actually defined here. They are in the board specific directory
+// such as boards/arduino_zero/pins.c.
diff --git a/ports/raspberrypi/common-hal/busio/I2C.c b/ports/raspberrypi/common-hal/busio/I2C.c
new file mode 100644
index 000000000..fa49e375e
--- /dev/null
+++ b/ports/raspberrypi/common-hal/busio/I2C.c
@@ -0,0 +1,175 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/busio/I2C.h"
+#include "py/mperrno.h"
+#include "py/runtime.h"
+
+#include "shared-bindings/microcontroller/__init__.h"
+#include "supervisor/shared/translate.h"
+
+#include "src/rp2_common/hardware_gpio/include/hardware/gpio.h"
+
+// Synopsys  DW_apb_i2c  (v2.01)  IP
+
+#define NO_PIN 0xff
+
+STATIC bool never_reset_i2c[2];
+STATIC i2c_inst_t* i2c[2] = {i2c0, i2c1};
+
+void reset_i2c(void) {
+    for (size_t i = 0; i < 2; i++) {
+        if (never_reset_i2c[i]) {
+            continue;
+        }
+
+        i2c_deinit(i2c[i]);
+    }
+}
+
+void common_hal_busio_i2c_construct(busio_i2c_obj_t *self,
+        const mcu_pin_obj_t* scl, const mcu_pin_obj_t* sda, uint32_t frequency, uint32_t timeout) {
+    self->peripheral = NULL;
+    // I2C pins have a regular pattern. SCL is always odd and SDA is even. They match up in pairs
+    // so we can divide by two to get the instance. This pattern repeats.
+    if (scl->number % 2 == 1 && sda->number % 2 == 0 && scl->number / 2 == sda->number / 2) {
+        size_t instance = (scl->number / 2) % 2;
+        self->peripheral = i2c[instance];
+    }
+    if (self->peripheral == NULL) {
+        mp_raise_ValueError(translate("Invalid pins"));
+    }
+    if ((i2c_get_hw(self->peripheral)->enable & I2C_IC_ENABLE_ENABLE_BITS) != 0) {
+        mp_raise_ValueError(translate("I2C peripheral in use"));
+    }
+    if (frequency > 1000000) {
+        mp_raise_ValueError(translate("Unsupported baudrate"));
+    }
+
+#if CIRCUITPY_REQUIRE_I2C_PULLUPS
+    // Test that the pins are in a high state. (Hopefully indicating they are pulled up.)
+    gpio_set_function(sda->number, GPIO_FUNC_SIO);
+    gpio_set_function(scl->number, GPIO_FUNC_SIO);
+    gpio_set_dir(sda->number, GPIO_IN);
+    gpio_set_dir(scl->number, GPIO_IN);
+
+    gpio_set_pulls(sda->number, false, true);
+    gpio_set_pulls(scl->number, false, true);
+
+    common_hal_mcu_delay_us(10);
+
+    gpio_set_pulls(sda->number, false, false);
+    gpio_set_pulls(scl->number, false, false);
+
+    // We must pull up within 3us to achieve 400khz.
+    common_hal_mcu_delay_us(3);
+
+    if (!gpio_get(sda->number) || !gpio_get(scl->number)) {
+        reset_pin_number(sda->number);
+        reset_pin_number(scl->number);
+        mp_raise_RuntimeError(translate("SDA or SCL needs a pull up"));
+    }
+#endif
+
+    gpio_set_function(sda->number, GPIO_FUNC_I2C);
+    gpio_set_function(scl->number, GPIO_FUNC_I2C);
+
+    self->baudrate = i2c_init(self->peripheral, frequency);
+
+    self->sda_pin = sda->number;
+    self->scl_pin = scl->number;
+    claim_pin(sda);
+    claim_pin(scl);
+}
+
+bool common_hal_busio_i2c_deinited(busio_i2c_obj_t *self) {
+    return self->sda_pin == NO_PIN;
+}
+
+void common_hal_busio_i2c_deinit(busio_i2c_obj_t *self) {
+    if (common_hal_busio_i2c_deinited(self)) {
+        return;
+    }
+    never_reset_i2c[i2c_hw_index(self->peripheral)] = false;
+
+    i2c_deinit(self->peripheral);
+
+    reset_pin_number(self->sda_pin);
+    reset_pin_number(self->scl_pin);
+    self->sda_pin = NO_PIN;
+    self->scl_pin = NO_PIN;
+}
+
+bool common_hal_busio_i2c_probe(busio_i2c_obj_t *self, uint8_t addr) {
+    uint8_t fake_read = 0;
+    return i2c_read_blocking(self->peripheral, addr, &fake_read, 1, false) != PICO_ERROR_GENERIC;
+}
+
+bool common_hal_busio_i2c_try_lock(busio_i2c_obj_t *self) {
+    bool grabbed_lock = false;
+    if (!self->has_lock) {
+        grabbed_lock = true;
+        self->has_lock = true;
+    }
+    return grabbed_lock;
+}
+
+bool common_hal_busio_i2c_has_lock(busio_i2c_obj_t *self) {
+    return self->has_lock;
+}
+
+void common_hal_busio_i2c_unlock(busio_i2c_obj_t *self) {
+    self->has_lock = false;
+}
+
+uint8_t common_hal_busio_i2c_write(busio_i2c_obj_t *self, uint16_t addr,
+                                   const uint8_t *data, size_t len, bool transmit_stop_bit) {
+    int result = i2c_write_blocking(self->peripheral, addr, data, len, !transmit_stop_bit);
+    if (result == len) {
+        return 0;
+    } else if (result == PICO_ERROR_GENERIC) {
+        return MP_ENODEV;
+    }
+    return MP_EIO;
+}
+
+uint8_t common_hal_busio_i2c_read(busio_i2c_obj_t *self, uint16_t addr,
+        uint8_t *data, size_t len) {
+    int result = i2c_read_blocking(self->peripheral, addr, data, len, false);
+    if (result == len) {
+        return 0;
+    } else if (result == PICO_ERROR_GENERIC) {
+        return MP_ENODEV;
+    }
+    return MP_EIO;
+}
+
+void common_hal_busio_i2c_never_reset(busio_i2c_obj_t *self) {
+    never_reset_i2c[i2c_hw_index(self->peripheral)] = true;
+
+    never_reset_pin_number(self->scl_pin);
+    never_reset_pin_number(self->sda_pin);
+}
diff --git a/ports/raspberrypi/common-hal/busio/I2C.h b/ports/raspberrypi/common-hal/busio/I2C.h
new file mode 100644
index 000000000..d09f29e54
--- /dev/null
+++ b/ports/raspberrypi/common-hal/busio/I2C.h
@@ -0,0 +1,47 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_BUSIO_I2C_H
+#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_BUSIO_I2C_H
+
+#include "common-hal/microcontroller/Pin.h"
+
+#include "py/obj.h"
+
+#include "src/rp2_common/hardware_i2c/include/hardware/i2c.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    i2c_inst_t * peripheral;
+    bool has_lock;
+    uint baudrate;
+    uint8_t scl_pin;
+    uint8_t sda_pin;
+} busio_i2c_obj_t;
+
+void reset_i2c(void);
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_BUSIO_I2C_H
diff --git a/ports/raspberrypi/common-hal/busio/OneWire.h b/ports/raspberrypi/common-hal/busio/OneWire.h
new file mode 100644
index 000000000..e27723ab2
--- /dev/null
+++ b/ports/raspberrypi/common-hal/busio/OneWire.h
@@ -0,0 +1,33 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_BUSIO_ONEWIRE_H
+#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_BUSIO_ONEWIRE_H
+
+// Use bitbangio.
+#include "shared-module/busio/OneWire.h"
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_BUSIO_ONEWIRE_H
diff --git a/ports/raspberrypi/common-hal/busio/SPI.c b/ports/raspberrypi/common-hal/busio/SPI.c
new file mode 100644
index 000000000..b157ae3eb
--- /dev/null
+++ b/ports/raspberrypi/common-hal/busio/SPI.c
@@ -0,0 +1,294 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/busio/SPI.h"
+
+#include "lib/utils/interrupt_char.h"
+#include "py/mperrno.h"
+#include "py/runtime.h"
+
+#include "supervisor/board.h"
+#include "common-hal/microcontroller/Pin.h"
+#include "supervisor/shared/rgb_led_status.h"
+#include "shared-bindings/microcontroller/Pin.h"
+
+#include "src/rp2_common/hardware_dma/include/hardware/dma.h"
+#include "src/rp2_common/hardware_gpio/include/hardware/gpio.h"
+
+#define NO_INSTANCE 0xff
+
+STATIC bool never_reset_spi[2];
+STATIC spi_inst_t* spi[2] = {spi0, spi1};
+
+void reset_spi(void) {
+    for (size_t i = 0; i < 2; i++) {
+        if (never_reset_spi[i]) {
+            continue;
+        }
+
+        spi_deinit(spi[i]);
+    }
+}
+
+void common_hal_busio_spi_construct(busio_spi_obj_t *self,
+        const mcu_pin_obj_t * clock, const mcu_pin_obj_t * mosi,
+        const mcu_pin_obj_t * miso) {
+    size_t instance_index = NO_INSTANCE;
+    if (clock->number % 4 == 2) {
+        instance_index = (clock->number / 8) % 2;
+    }
+    if (mosi != NULL) {
+        // Make sure the set MOSI matches the clock settings.
+        if (mosi->number % 4 != 3 ||
+            (mosi->number / 8) % 2 != instance_index) {
+            instance_index = NO_INSTANCE;
+        }
+    }
+    if (miso != NULL) {
+        // Make sure the set MOSI matches the clock settings.
+        if (miso->number % 4 != 0 ||
+            (miso->number / 8) % 2 != instance_index) {
+            instance_index = NO_INSTANCE;
+        }
+    }
+
+    // TODO: Check to see if we're sharing the SPI with a native APA102.
+
+    if (instance_index > 1) {
+        mp_raise_ValueError(translate("Invalid pins"));
+    }
+
+    if (instance_index == 0) {
+        self->peripheral = spi0;
+    } else if (instance_index == 1) {
+        self->peripheral = spi1;
+    }
+
+    if ((spi_get_hw(self->peripheral)->cr1 & SPI_SSPCR1_SSE_BITS) != 0) {
+        mp_raise_ValueError(translate("SPI peripheral in use"));
+    }
+
+    spi_init(self->peripheral, 250000);
+
+    gpio_set_function(clock->number, GPIO_FUNC_SPI);
+    claim_pin(clock);
+    self->clock = clock;
+
+    self->MOSI = mosi;
+    if (mosi != NULL) {
+        gpio_set_function(mosi->number, GPIO_FUNC_SPI);
+        claim_pin(mosi);
+    }
+
+    self->MISO = miso;
+    if (miso != NULL) {
+        gpio_set_function(miso->number, GPIO_FUNC_SPI);
+        claim_pin(miso);
+    }
+}
+
+void common_hal_busio_spi_never_reset(busio_spi_obj_t *self) {
+    never_reset_spi[spi_get_index(self->peripheral)] = true;
+
+    common_hal_never_reset_pin(self->clock);
+    common_hal_never_reset_pin(self->MOSI);
+    common_hal_never_reset_pin(self->MISO);
+}
+
+bool common_hal_busio_spi_deinited(busio_spi_obj_t *self) {
+    return self->clock == NULL;
+}
+
+void common_hal_busio_spi_deinit(busio_spi_obj_t *self) {
+    if (common_hal_busio_spi_deinited(self)) {
+        return;
+    }
+    never_reset_spi[spi_get_index(self->peripheral)] = false;
+    spi_deinit(self->peripheral);
+
+    common_hal_reset_pin(self->clock);
+    common_hal_reset_pin(self->MOSI);
+    common_hal_reset_pin(self->MISO);
+    self->clock = NULL;
+}
+
+bool common_hal_busio_spi_configure(busio_spi_obj_t *self,
+        uint32_t baudrate, uint8_t polarity, uint8_t phase, uint8_t bits) {
+    if (baudrate == self->target_frequency &&
+        polarity == self->polarity &&
+        phase == self->phase &&
+        bits == self->bits) {
+        return true;
+    }
+
+    spi_set_format(self->peripheral, bits, polarity, phase, SPI_MSB_FIRST);
+
+    self->polarity = polarity;
+    self->phase = phase;
+    self->bits = bits;
+    self->target_frequency = baudrate;
+    self->real_frequency = spi_set_baudrate(self->peripheral, baudrate);
+
+    return true;
+}
+
+bool common_hal_busio_spi_try_lock(busio_spi_obj_t *self) {
+    bool grabbed_lock = false;
+    if (!self->has_lock) {
+        grabbed_lock = true;
+        self->has_lock = true;
+    }
+    return grabbed_lock;
+}
+
+bool common_hal_busio_spi_has_lock(busio_spi_obj_t *self) {
+    return self->has_lock;
+}
+
+void common_hal_busio_spi_unlock(busio_spi_obj_t *self) {
+    self->has_lock = false;
+}
+
+static bool _transfer(busio_spi_obj_t *self,
+    const uint8_t *data_out, size_t out_len,
+    uint8_t *data_in, size_t in_len) {
+    // Use DMA for large transfers if channels are available
+    const size_t dma_min_size_threshold = 32;
+    int chan_tx = -1;
+    int chan_rx = -1;
+    size_t len = MAX(out_len, in_len);
+    if (len >= dma_min_size_threshold) {
+        // Use two DMA channels to service the two FIFOs
+        chan_tx = dma_claim_unused_channel(false);
+        chan_rx = dma_claim_unused_channel(false);
+    }
+    bool use_dma = chan_rx >= 0 && chan_tx >= 0;
+    if (use_dma) {
+        dma_channel_config c = dma_channel_get_default_config(chan_tx);
+        channel_config_set_transfer_data_size(&c, DMA_SIZE_8);
+        channel_config_set_dreq(&c, spi_get_index(self->peripheral) ? DREQ_SPI1_TX : DREQ_SPI0_TX);
+        channel_config_set_read_increment(&c, out_len == len);
+        channel_config_set_write_increment(&c, false);
+        dma_channel_configure(chan_tx, &c,
+            &spi_get_hw(self->peripheral)->dr,
+            data_out,
+            len,
+            false);
+
+        c = dma_channel_get_default_config(chan_rx);
+        channel_config_set_transfer_data_size(&c, DMA_SIZE_8);
+        channel_config_set_dreq(&c, spi_get_index(self->peripheral) ? DREQ_SPI1_RX : DREQ_SPI0_RX);
+        channel_config_set_read_increment(&c, false);
+        channel_config_set_write_increment(&c, in_len == len);
+        dma_channel_configure(chan_rx, &c,
+            data_in,
+            &spi_get_hw(self->peripheral)->dr,
+            len,
+            false);
+
+        dma_start_channel_mask((1u << chan_rx) | (1u << chan_tx));
+        while (dma_channel_is_busy(chan_rx) || dma_channel_is_busy(chan_tx)) {
+            // TODO: We should idle here until we get a DMA interrupt or something else.
+            RUN_BACKGROUND_TASKS;
+            if (mp_hal_is_interrupted()) {
+                if (dma_channel_is_busy(chan_rx)) {
+                    dma_channel_abort(chan_rx);
+                }
+                if (dma_channel_is_busy(chan_tx)) {
+                    dma_channel_abort(chan_tx);
+                }
+                break;
+            }
+        }
+    }
+
+    // If we have claimed only one channel successfully, we should release immediately. This also
+    // releases the DMA after use_dma has been done.
+    if (chan_rx >= 0) {
+        dma_channel_unclaim(chan_rx);
+    }
+    if (chan_tx >= 0) {
+        dma_channel_unclaim(chan_tx);
+    }
+
+    if (!use_dma && !mp_hal_is_interrupted()) {
+        // Use software for small transfers, or if couldn't claim two DMA channels
+        // Never have more transfers in flight than will fit into the RX FIFO,
+        // else FIFO will overflow if this code is heavily interrupted.
+        const size_t fifo_depth = 8;
+        size_t rx_remaining = len;
+        size_t tx_remaining = len;
+
+        while (!mp_hal_is_interrupted() && (rx_remaining || tx_remaining)) {
+            if (tx_remaining && spi_is_writable(self->peripheral) && rx_remaining - tx_remaining < fifo_depth) {
+                spi_get_hw(self->peripheral)->dr = (uint32_t) *data_out;
+                // Increment only if the buffer is the transfer length. It's 1 otherwise.
+                if (out_len == len) {
+                    data_out++;
+                }
+                --tx_remaining;
+            }
+            if (rx_remaining && spi_is_readable(self->peripheral)) {
+                *data_in = (uint8_t) spi_get_hw(self->peripheral)->dr;
+                // Increment only if the buffer is the transfer length. It's 1 otherwise.
+                if (in_len == len) {
+                    data_in++;
+                }
+                --rx_remaining;
+            }
+            RUN_BACKGROUND_TASKS;
+        }
+    }
+    return true;
+}
+
+bool common_hal_busio_spi_write(busio_spi_obj_t *self,
+        const uint8_t *data, size_t len) {
+    uint32_t data_in;
+    return _transfer(self, data, len, (uint8_t*) &data_in, MIN(len, 4));
+}
+
+bool common_hal_busio_spi_read(busio_spi_obj_t *self,
+        uint8_t *data, size_t len, uint8_t write_value) {
+    uint32_t data_out = write_value << 24 | write_value << 16 | write_value << 8 | write_value;
+    return _transfer(self, (const uint8_t*) &data_out, MIN(4, len), data, len);
+}
+
+bool common_hal_busio_spi_transfer(busio_spi_obj_t *self, const uint8_t *data_out, uint8_t *data_in, size_t len) {
+    return _transfer(self, data_out, len, data_in, len);
+}
+
+uint32_t common_hal_busio_spi_get_frequency(busio_spi_obj_t* self) {
+    return self->real_frequency;
+}
+
+uint8_t common_hal_busio_spi_get_phase(busio_spi_obj_t* self) {
+    return self->phase;
+}
+
+uint8_t common_hal_busio_spi_get_polarity(busio_spi_obj_t* self) {
+    return self->polarity;
+}
diff --git a/ports/raspberrypi/common-hal/busio/SPI.h b/ports/raspberrypi/common-hal/busio/SPI.h
new file mode 100644
index 000000000..981db46d4
--- /dev/null
+++ b/ports/raspberrypi/common-hal/busio/SPI.h
@@ -0,0 +1,52 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_BUSIO_SPI_H
+#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_BUSIO_SPI_H
+
+#include "common-hal/microcontroller/Pin.h"
+
+#include "py/obj.h"
+
+#include "src/rp2_common/hardware_spi/include/hardware/spi.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    spi_inst_t * peripheral;
+    bool has_lock;
+    const mcu_pin_obj_t* clock;
+    const mcu_pin_obj_t* MOSI;
+    const mcu_pin_obj_t* MISO;
+    uint32_t target_frequency;
+    int32_t real_frequency;
+    uint8_t polarity;
+    uint8_t phase;
+    uint8_t bits;
+} busio_spi_obj_t;
+
+void reset_spi(void);
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_BUSIO_SPI_H
diff --git a/ports/raspberrypi/common-hal/busio/UART.c b/ports/raspberrypi/common-hal/busio/UART.c
new file mode 100644
index 000000000..71da6cadd
--- /dev/null
+++ b/ports/raspberrypi/common-hal/busio/UART.c
@@ -0,0 +1,403 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/microcontroller/__init__.h"
+#include "shared-bindings/busio/UART.h"
+
+#include "mpconfigport.h"
+#include "lib/utils/interrupt_char.h"
+#include "py/gc.h"
+#include "py/mperrno.h"
+#include "py/runtime.h"
+#include "py/stream.h"
+#include "supervisor/shared/translate.h"
+#include "supervisor/shared/tick.h"
+
+#define UART_DEBUG(...) (void)0
+// #define UART_DEBUG(...) mp_printf(&mp_plat_print __VA_OPT__(,) __VA_ARGS__)
+
+// Do-nothing callback needed so that usart_async code will enable rx interrupts.
+// See comment below re usart_async_register_callback()
+// static void usart_async_rxc_callback(const struct usart_async_descriptor *const descr) {
+//     // Nothing needs to be done by us.
+// }
+
+#define NO_PIN 0xff
+
+void common_hal_busio_uart_construct(busio_uart_obj_t *self,
+    const mcu_pin_obj_t * tx, const mcu_pin_obj_t * rx,
+    const mcu_pin_obj_t * rts, const mcu_pin_obj_t * cts,
+    const mcu_pin_obj_t * rs485_dir, bool rs485_invert,
+    uint32_t baudrate, uint8_t bits, busio_uart_parity_t parity, uint8_t stop,
+    mp_float_t timeout, uint16_t receiver_buffer_size, byte* receiver_buffer,
+    bool sigint_enabled) {
+
+//     Sercom* sercom = NULL;
+//     uint8_t sercom_index = 255; // Unset index
+//     uint32_t rx_pinmux = 0;
+//     uint8_t rx_pad = 255; // Unset pad
+//     uint32_t tx_pinmux = 0;
+//     uint8_t tx_pad = 255; // Unset pad
+
+//     if ((rts != NULL) || (cts != NULL) || (rs485_dir != NULL) || (rs485_invert)) {
+//         mp_raise_ValueError(translate("RTS/CTS/RS485 Not yet supported on this device"));
+//     }
+
+//     if (bits > 8) {
+//         mp_raise_NotImplementedError(translate("bytes > 8 bits not supported"));
+//     }
+
+//     bool have_tx = tx != NULL;
+//     bool have_rx = rx != NULL;
+//     if (!have_tx && !have_rx) {
+//         mp_raise_ValueError(translate("tx and rx cannot both be None"));
+//     }
+
+//     self->baudrate = baudrate;
+//     self->character_bits = bits;
+//     self->timeout_ms = timeout * 1000;
+
+//     // This assignment is only here because the usart_async routines take a *const argument.
+//     struct usart_async_descriptor * const usart_desc_p = (struct usart_async_descriptor * const) &self->usart_desc;
+
+//     for (int i = 0; i < NUM_SERCOMS_PER_PIN; i++) {
+//         Sercom* potential_sercom = NULL;
+//         if (have_tx) {
+//             sercom_index = tx->sercom[i].index;
+//             if (sercom_index >= SERCOM_INST_NUM) {
+//                 continue;
+//             }
+//             potential_sercom = sercom_insts[sercom_index];
+// #ifdef SAMD21
+// 	    if (potential_sercom->USART.CTRLA.bit.ENABLE != 0 ||
+//                 !(tx->sercom[i].pad == 0 ||
+//                   tx->sercom[i].pad == 2)) {
+//                 continue;
+//             }
+// #endif
+// #ifdef SAM_D5X_E5X
+// 	    if (potential_sercom->USART.CTRLA.bit.ENABLE != 0 ||
+//                 !(tx->sercom[i].pad == 0)) {
+//                 continue;
+//             }
+// #endif
+//             tx_pinmux = PINMUX(tx->number, (i == 0) ? MUX_C : MUX_D);
+//             tx_pad = tx->sercom[i].pad;
+//             if (rx == NULL) {
+//                 sercom = potential_sercom;
+//                 break;
+//             }
+//         }
+//         for (int j = 0; j < NUM_SERCOMS_PER_PIN; j++) {
+//             if (((!have_tx && rx->sercom[j].index < SERCOM_INST_NUM &&
+//                   sercom_insts[rx->sercom[j].index]->USART.CTRLA.bit.ENABLE == 0) ||
+//                  sercom_index == rx->sercom[j].index) &&
+//                 rx->sercom[j].pad != tx_pad) {
+//                 rx_pinmux = PINMUX(rx->number, (j == 0) ? MUX_C : MUX_D);
+//                 rx_pad = rx->sercom[j].pad;
+//                 sercom = sercom_insts[rx->sercom[j].index];
+//                 sercom_index = rx->sercom[j].index;
+//                 break;
+//             }
+//         }
+//         if (sercom != NULL) {
+//             break;
+//         }
+//     }
+//     if (sercom == NULL) {
+//         mp_raise_ValueError(translate("Invalid pins"));
+//     }
+//     if (!have_tx) {
+//         tx_pad = 0;
+//         if (rx_pad == 0) {
+//             tx_pad = 2;
+//         }
+//     }
+//     if (!have_rx) {
+//         rx_pad = (tx_pad + 1) % 4;
+//     }
+
+//     // Set up clocks on SERCOM.
+//     samd_peripherals_sercom_clock_init(sercom, sercom_index);
+
+//     if (rx && receiver_buffer_size > 0) {
+//         self->buffer_length = receiver_buffer_size;
+//         // Initially allocate the UART's buffer in the long-lived part of the
+//         // heap.  UARTs are generally long-lived objects, but the "make long-
+//         // lived" machinery is incapable of moving internal pointers like
+//         // self->buffer, so do it manually.  (However, as long as internal
+//         // pointers like this are NOT moved, allocating the buffer
+//         // in the long-lived pool is not strictly necessary)
+//         self->buffer = (uint8_t *) gc_alloc(self->buffer_length * sizeof(uint8_t), false, true);
+//         if (self->buffer == NULL) {
+//             common_hal_busio_uart_deinit(self);
+//             mp_raise_msg_varg(&mp_type_MemoryError, translate("Failed to allocate RX buffer of %d bytes"), self->buffer_length * sizeof(uint8_t));
+//         }
+//     } else {
+//         self->buffer_length = 0;
+//         self->buffer = NULL;
+//     }
+
+//     if (usart_async_init(usart_desc_p, sercom, self->buffer, self->buffer_length, NULL) != ERR_NONE) {
+//         mp_raise_ValueError(translate("Could not initialize UART"));
+//     }
+
+//     // usart_async_init() sets a number of defaults based on a prototypical SERCOM
+//     // which don't necessarily match what we need. After calling it, set the values
+//     // specific to this instantiation of UART.
+
+//     // Set pads computed for this SERCOM.
+//     // TXPO:
+//     // 0x0: TX pad 0; no RTS/CTS
+//     // 0x1: TX pad 2; no RTS/CTS
+//     // 0x2: TX pad 0; RTS: pad 2, CTS: pad 3 (not used by us right now)
+//     // So divide by 2 to map pad to value.
+//     // RXPO:
+//     // 0x0: RX pad 0
+//     // 0x1: RX pad 1
+//     // 0x2: RX pad 2
+//     // 0x3: RX pad 3
+
+//     // Doing a group mask and set of the registers saves 60 bytes over setting the bitfields individually.
+
+//     sercom->USART.CTRLA.reg &= ~(SERCOM_USART_CTRLA_TXPO_Msk |
+//                                  SERCOM_USART_CTRLA_RXPO_Msk |
+//                                  SERCOM_USART_CTRLA_FORM_Msk);
+//     sercom->USART.CTRLA.reg |= SERCOM_USART_CTRLA_TXPO(tx_pad / 2) |
+//                                SERCOM_USART_CTRLA_RXPO(rx_pad) |
+//                                (parity == BUSIO_UART_PARITY_NONE ? 0 : SERCOM_USART_CTRLA_FORM(1));
+
+//     // Enable tx and/or rx based on whether the pins were specified.
+//     // CHSIZE is 0 for 8 bits, 5, 6, 7 for 5, 6, 7 bits. 1 for 9 bits, but we don't support that.
+//     sercom->USART.CTRLB.reg &= ~(SERCOM_USART_CTRLB_TXEN |
+//                                  SERCOM_USART_CTRLB_RXEN |
+//                                  SERCOM_USART_CTRLB_PMODE |
+//                                  SERCOM_USART_CTRLB_SBMODE |
+//                                  SERCOM_USART_CTRLB_CHSIZE_Msk);
+//     sercom->USART.CTRLB.reg |= (have_tx ? SERCOM_USART_CTRLB_TXEN : 0) |
+//                                (have_rx ? SERCOM_USART_CTRLB_RXEN : 0) |
+//                                (parity == BUSIO_UART_PARITY_ODD ? SERCOM_USART_CTRLB_PMODE : 0) |
+//                                (stop > 1 ? SERCOM_USART_CTRLB_SBMODE : 0) |
+//                                SERCOM_USART_CTRLB_CHSIZE(bits % 8);
+
+//     // Set baud rate
+//     common_hal_busio_uart_set_baudrate(self, baudrate);
+
+//     // Turn on rx interrupt handling. The UART async driver has its own set of internal callbacks,
+//     // which are set up by uart_async_init(). These in turn can call user-specified callbacks.
+//     // In fact, the actual interrupts are not enabled unless we set up a user-specified callback.
+//     // This is confusing. It's explained in the Atmel START User Guide -> Implementation Description ->
+//     // Different read function behavior in some asynchronous drivers. As of this writing:
+//     // http://start.atmel.com/static/help/index.html?GUID-79201A5A-226F-4FBB-B0B8-AB0BE0554836
+//     // Look at the ASFv4 code example for async USART.
+//     usart_async_register_callback(usart_desc_p, USART_ASYNC_RXC_CB, usart_async_rxc_callback);
+
+
+//     if (have_tx) {
+//         gpio_set_pin_direction(tx->number, GPIO_DIRECTION_OUT);
+//         gpio_set_pin_pull_mode(tx->number, GPIO_PULL_OFF);
+//         gpio_set_pin_function(tx->number, tx_pinmux);
+//         self->tx_pin  = tx->number;
+//         claim_pin(tx);
+//     } else {
+//         self->tx_pin = NO_PIN;
+//     }
+
+//     if (have_rx) {
+//         gpio_set_pin_direction(rx->number, GPIO_DIRECTION_IN);
+//         gpio_set_pin_pull_mode(rx->number, GPIO_PULL_OFF);
+//         gpio_set_pin_function(rx->number, rx_pinmux);
+//         self->rx_pin  = rx->number;
+//         claim_pin(rx);
+//     } else {
+//         self->rx_pin = NO_PIN;
+//     }
+
+//     usart_async_enable(usart_desc_p);
+}
+
+bool common_hal_busio_uart_deinited(busio_uart_obj_t *self) {
+    return self->rx_pin == NO_PIN && self->tx_pin == NO_PIN;
+}
+
+void common_hal_busio_uart_deinit(busio_uart_obj_t *self) {
+    if (common_hal_busio_uart_deinited(self)) {
+        return;
+    }
+    // This assignment is only here because the usart_async routines take a *const argument.
+    // struct usart_async_descriptor * const usart_desc_p = (struct usart_async_descriptor * const) &self->usart_desc;
+    // usart_async_disable(usart_desc_p);
+    // usart_async_deinit(usart_desc_p);
+    reset_pin_number(self->rx_pin);
+    reset_pin_number(self->tx_pin);
+    self->rx_pin = NO_PIN;
+    self->tx_pin = NO_PIN;
+}
+
+// Read characters.
+size_t common_hal_busio_uart_read(busio_uart_obj_t *self, uint8_t *data, size_t len, int *errcode) {
+    if (self->rx_pin == NO_PIN) {
+        mp_raise_ValueError(translate("No RX pin"));
+    }
+
+    // This assignment is only here because the usart_async routines take a *const argument.
+    // struct usart_async_descriptor * const usart_desc_p = (struct usart_async_descriptor * const) &self->usart_desc;
+
+    if (len == 0) {
+        // Nothing to read.
+        return 0;
+    }
+
+    // struct io_descriptor *io;
+    // usart_async_get_io_descriptor(usart_desc_p, &io);
+
+    size_t total_read = 0;
+    // uint64_t start_ticks = supervisor_ticks_ms64();
+
+    // // Busy-wait until timeout or until we've read enough chars.
+    // while (supervisor_ticks_ms64() - start_ticks <= self->timeout_ms) {
+    //     // Read as many chars as we can right now, up to len.
+    //     size_t num_read = io_read(io, data, len);
+
+    //     // Advance pointer in data buffer, and decrease how many chars left to read.
+    //     data += num_read;
+    //     len -= num_read;
+    //     total_read += num_read;
+    //     if (len == 0) {
+    //         // Don't need to read any more: data buf is full.
+    //         break;
+    //     }
+    //     if (num_read > 0) {
+    //         // Reset the timeout on every character read.
+    //         start_ticks = supervisor_ticks_ms64();
+    //     }
+    //     RUN_BACKGROUND_TASKS;
+    //     // Allow user to break out of a timeout with a KeyboardInterrupt.
+    //     if (mp_hal_is_interrupted()) {
+    //         break;
+    //     }
+    //     // If we are zero timeout, make sure we don't loop again (in the event
+    //     // we read in under 1ms)
+    //     if (self->timeout_ms == 0) {
+    //         break;
+    //     }
+    // }
+
+    // if (total_read == 0) {
+    //     *errcode = EAGAIN;
+    //     return MP_STREAM_ERROR;
+    // }
+
+    return total_read;
+}
+
+// Write characters.
+size_t common_hal_busio_uart_write(busio_uart_obj_t *self, const uint8_t *data, size_t len, int *errcode) {
+    if (self->tx_pin == NO_PIN) {
+        mp_raise_ValueError(translate("No TX pin"));
+    }
+
+    // This assignment is only here because the usart_async routines take a *const argument.
+    // struct usart_async_descriptor * const usart_desc_p = (struct usart_async_descriptor * const) &self->usart_desc;
+
+    // struct io_descriptor *io;
+    // usart_async_get_io_descriptor(usart_desc_p, &io);
+
+    // // Start writing characters. This is non-blocking and will
+    // // return immediately after setting up the write.
+    // if (io_write(io, data, len) < 0) {
+    //     *errcode = MP_EAGAIN;
+    //     return MP_STREAM_ERROR;
+    // }
+
+    // // Busy-wait until all characters transmitted.
+    // struct usart_async_status async_status;
+    // while (true) {
+    //     usart_async_get_status(usart_desc_p, &async_status);
+    //     if (async_status.txcnt >= len) {
+    //         break;
+    //     }
+    //     RUN_BACKGROUND_TASKS;
+    // }
+
+    return len;
+}
+
+uint32_t common_hal_busio_uart_get_baudrate(busio_uart_obj_t *self) {
+    return self->baudrate;
+}
+
+void common_hal_busio_uart_set_baudrate(busio_uart_obj_t *self, uint32_t baudrate) {
+    // This assignment is only here because the usart_async routines take a *const argument.
+    // struct usart_async_descriptor * const usart_desc_p = (struct usart_async_descriptor * const) &self->usart_desc;
+    // usart_async_set_baud_rate(usart_desc_p,
+    //                           // Samples and ARITHMETIC vs FRACTIONAL must correspond to USART_SAMPR in
+    //                           // hpl_sercom_config.h.
+    //                           _usart_async_calculate_baud_rate(baudrate,  // e.g. 9600 baud
+    //                                                            PROTOTYPE_SERCOM_USART_ASYNC_CLOCK_FREQUENCY,
+    //                                                            16,   // samples
+    //                                                            USART_BAUDRATE_ASYNCH_ARITHMETIC,
+    //                                                            0  // fraction - not used for ARITHMETIC
+    //                                                            ));
+    self->baudrate = baudrate;
+}
+
+mp_float_t common_hal_busio_uart_get_timeout(busio_uart_obj_t *self) {
+    return (mp_float_t) (self->timeout_ms / 1000.0f);
+}
+
+void common_hal_busio_uart_set_timeout(busio_uart_obj_t *self, mp_float_t timeout) {
+    self->timeout_ms = timeout * 1000;
+}
+
+uint32_t common_hal_busio_uart_rx_characters_available(busio_uart_obj_t *self) {
+    // This assignment is only here because the usart_async routines take a *const argument.
+    // struct usart_async_descriptor * const usart_desc_p = (struct usart_async_descriptor * const) &self->usart_desc;
+    // struct usart_async_status async_status;
+    // usart_async_get_status(usart_desc_p, &async_status);
+    // return async_status.rxcnt;
+    return 0;
+}
+
+void common_hal_busio_uart_clear_rx_buffer(busio_uart_obj_t *self) {
+    // This assignment is only here because the usart_async routines take a *const argument.
+    // struct usart_async_descriptor * const usart_desc_p = (struct usart_async_descriptor * const) &self->usart_desc;
+    // usart_async_flush_rx_buffer(usart_desc_p);
+
+}
+
+// True if there are no characters still to be written.
+bool common_hal_busio_uart_ready_to_tx(busio_uart_obj_t *self) {
+    if (self->tx_pin == NO_PIN) {
+        return false;
+    }
+    return false;
+    // // This assignment is only here because the usart_async routines take a *const argument.
+    // struct usart_async_descriptor * const usart_desc_p = (struct usart_async_descriptor * const) &self->usart_desc;
+    // struct usart_async_status async_status;
+    // usart_async_get_status(usart_desc_p, &async_status);
+    // return !(async_status.flags & USART_ASYNC_STATUS_BUSY);
+}
diff --git a/ports/raspberrypi/common-hal/busio/UART.h b/ports/raspberrypi/common-hal/busio/UART.h
new file mode 100644
index 000000000..43ed9bee0
--- /dev/null
+++ b/ports/raspberrypi/common-hal/busio/UART.h
@@ -0,0 +1,47 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_BUSIO_UART_H
+#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_BUSIO_UART_H
+
+#include "common-hal/microcontroller/Pin.h"
+
+#include "py/obj.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    // struct usart_async_descriptor usart_desc;
+    uint8_t rx_pin;
+    uint8_t tx_pin;
+    uint8_t character_bits;
+    bool rx_error;
+    uint32_t baudrate;
+    uint32_t timeout_ms;
+    uint32_t buffer_length;
+    uint8_t* buffer;
+} busio_uart_obj_t;
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_BUSIO_UART_H
diff --git a/ports/raspberrypi/common-hal/busio/__init__.c b/ports/raspberrypi/common-hal/busio/__init__.c
new file mode 100644
index 000000000..41761b674
--- /dev/null
+++ b/ports/raspberrypi/common-hal/busio/__init__.c
@@ -0,0 +1 @@
+// No busio module functions.
diff --git a/ports/raspberrypi/common-hal/digitalio/DigitalInOut.c b/ports/raspberrypi/common-hal/digitalio/DigitalInOut.c
new file mode 100644
index 000000000..06f0cfdd2
--- /dev/null
+++ b/ports/raspberrypi/common-hal/digitalio/DigitalInOut.c
@@ -0,0 +1,157 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdint.h>
+#include <string.h>
+
+#include "py/runtime.h"
+#include "py/mphal.h"
+
+#include "common-hal/microcontroller/Pin.h"
+#include "shared-bindings/digitalio/DigitalInOut.h"
+#include "supervisor/shared/translate.h"
+
+#include "src/rp2_common/hardware_gpio/include/hardware/gpio.h"
+
+digitalinout_result_t common_hal_digitalio_digitalinout_construct(
+        digitalio_digitalinout_obj_t* self, const mcu_pin_obj_t* pin) {
+    claim_pin(pin);
+    self->pin = pin;
+    self->output = false;
+    self->open_drain = false;
+
+    gpio_init(pin->number);
+    return DIGITALINOUT_OK;
+}
+
+void common_hal_digitalio_digitalinout_never_reset(
+        digitalio_digitalinout_obj_t *self) {
+    never_reset_pin_number(self->pin->number);
+}
+
+bool common_hal_digitalio_digitalinout_deinited(digitalio_digitalinout_obj_t* self) {
+    return self->pin == NULL;
+}
+
+void common_hal_digitalio_digitalinout_deinit(digitalio_digitalinout_obj_t* self) {
+    if (common_hal_digitalio_digitalinout_deinited(self)) {
+        return;
+    }
+    reset_pin_number(self->pin->number);
+    self->pin = NULL;
+}
+
+void common_hal_digitalio_digitalinout_switch_to_input(
+        digitalio_digitalinout_obj_t* self, digitalio_pull_t pull) {
+    self->output = false;
+    // This also sets direction to input.
+    common_hal_digitalio_digitalinout_set_pull(self, pull);
+}
+
+digitalinout_result_t common_hal_digitalio_digitalinout_switch_to_output(
+        digitalio_digitalinout_obj_t* self, bool value,
+        digitalio_drive_mode_t drive_mode) {
+    const uint8_t pin = self->pin->number;
+    gpio_set_dir(pin, GPIO_OUT);
+    // Turn on "strong" pin driving (more current available). See DRVSTR doc in datasheet.
+    // hri_port_set_PINCFG_DRVSTR_bit(PORT, (enum gpio_port)GPIO_PORT(pin), GPIO_PIN(pin));
+
+    self->output = true;
+    common_hal_digitalio_digitalinout_set_drive_mode(self, drive_mode);
+    common_hal_digitalio_digitalinout_set_value(self, value);
+    return DIGITALINOUT_OK;
+}
+
+digitalio_direction_t common_hal_digitalio_digitalinout_get_direction(
+        digitalio_digitalinout_obj_t* self) {
+    return self->output ? DIRECTION_OUTPUT : DIRECTION_INPUT;
+}
+
+void common_hal_digitalio_digitalinout_set_value(
+        digitalio_digitalinout_obj_t* self, bool value) {
+    const uint8_t pin = self->pin->number;
+    if (self->open_drain) {
+        gpio_set_dir(pin, value ? GPIO_IN : GPIO_OUT);
+    } else {
+        gpio_put(pin, value);
+    }
+}
+
+bool common_hal_digitalio_digitalinout_get_value(
+        digitalio_digitalinout_obj_t* self) {
+    return gpio_get(self->pin->number);
+}
+
+digitalinout_result_t common_hal_digitalio_digitalinout_set_drive_mode(
+        digitalio_digitalinout_obj_t* self,
+        digitalio_drive_mode_t drive_mode) {
+    const uint8_t pin = self->pin->number;
+    bool value = common_hal_digitalio_digitalinout_get_value(self);
+    self->open_drain = drive_mode == DRIVE_MODE_OPEN_DRAIN;
+    if (self->open_drain) {
+        gpio_put(pin, false);
+    }
+    // True is implemented differently between modes so reset the value to make
+    // sure it's correct for the new mode.
+    if (value) {
+        common_hal_digitalio_digitalinout_set_value(self, value);
+    }
+    return DIGITALINOUT_OK;
+}
+
+digitalio_drive_mode_t common_hal_digitalio_digitalinout_get_drive_mode(
+        digitalio_digitalinout_obj_t* self) {
+    if (self->open_drain) {
+        return DRIVE_MODE_OPEN_DRAIN;
+    } else {
+        return DRIVE_MODE_PUSH_PULL;
+    }
+}
+
+void common_hal_digitalio_digitalinout_set_pull(
+        digitalio_digitalinout_obj_t* self, digitalio_pull_t pull) {
+    const uint8_t pin = self->pin->number;
+    gpio_set_pulls(pin, pull == PULL_UP, pull == PULL_DOWN);
+    gpio_set_dir(pin, GPIO_IN);
+}
+
+digitalio_pull_t common_hal_digitalio_digitalinout_get_pull(
+        digitalio_digitalinout_obj_t* self) {
+    // uint32_t pin = self->pin->number;
+    // if (self->output) {
+    //     mp_raise_AttributeError(translate("Cannot get pull while in output mode"));
+    //     return PULL_NONE;
+    // } else {
+    //     if (hri_port_get_PINCFG_PULLEN_bit(PORT, GPIO_PORT(pin), GPIO_PIN(pin)) == 0) {
+    //         return PULL_NONE;
+    //     } if (hri_port_get_OUT_reg(PORT, GPIO_PORT(pin), 1U << GPIO_PIN(pin)) > 0) {
+    //         return PULL_UP;
+    //     } else {
+    //         return PULL_DOWN;
+    //     }
+    // }
+    return PULL_NONE;
+}
diff --git a/ports/raspberrypi/common-hal/digitalio/DigitalInOut.h b/ports/raspberrypi/common-hal/digitalio/DigitalInOut.h
new file mode 100644
index 000000000..8b14bbad8
--- /dev/null
+++ b/ports/raspberrypi/common-hal/digitalio/DigitalInOut.h
@@ -0,0 +1,40 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_DIGITALIO_DIGITALINOUT_H
+#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_DIGITALIO_DIGITALINOUT_H
+
+#include "common-hal/microcontroller/Pin.h"
+#include "py/obj.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    const mcu_pin_obj_t * pin;
+    bool output;
+    bool open_drain;
+} digitalio_digitalinout_obj_t;
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_DIGITALIO_DIGITALINOUT_H
diff --git a/ports/raspberrypi/common-hal/digitalio/__init__.c b/ports/raspberrypi/common-hal/digitalio/__init__.c
new file mode 100644
index 000000000..20fad4595
--- /dev/null
+++ b/ports/raspberrypi/common-hal/digitalio/__init__.c
@@ -0,0 +1 @@
+// No digitalio module functions.
diff --git a/ports/raspberrypi/common-hal/displayio/ParallelBus.c b/ports/raspberrypi/common-hal/displayio/ParallelBus.c
new file mode 100644
index 000000000..57b2ffc36
--- /dev/null
+++ b/ports/raspberrypi/common-hal/displayio/ParallelBus.c
@@ -0,0 +1,68 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/displayio/ParallelBus.h"
+
+#include <stdint.h>
+
+#include "common-hal/microcontroller/Pin.h"
+#include "py/runtime.h"
+#include "shared-bindings/digitalio/DigitalInOut.h"
+#include "shared-bindings/microcontroller/__init__.h"
+
+void common_hal_displayio_parallelbus_construct(displayio_parallelbus_obj_t* self,
+    const mcu_pin_obj_t* data0, const mcu_pin_obj_t* command, const mcu_pin_obj_t* chip_select,
+    const mcu_pin_obj_t* write, const mcu_pin_obj_t* read, const mcu_pin_obj_t* reset) {
+
+    mp_raise_NotImplementedError(translate("ParallelBus not yet supported"));
+    // TODO: Implement with PIO and DMA.
+}
+
+void common_hal_displayio_parallelbus_deinit(displayio_parallelbus_obj_t* self) {
+
+}
+
+bool common_hal_displayio_parallelbus_reset(mp_obj_t obj) {
+	return false;
+}
+
+bool common_hal_displayio_parallelbus_bus_free(mp_obj_t obj) {
+    return false;
+}
+
+bool common_hal_displayio_parallelbus_begin_transaction(mp_obj_t obj) {
+
+    return false;
+}
+
+void common_hal_displayio_parallelbus_send(mp_obj_t obj, display_byte_type_t byte_type,
+        display_chip_select_behavior_t chip_select, const uint8_t *data, uint32_t data_length) {
+
+}
+
+void common_hal_displayio_parallelbus_end_transaction(mp_obj_t obj) {
+
+}
diff --git a/ports/raspberrypi/common-hal/displayio/ParallelBus.h b/ports/raspberrypi/common-hal/displayio/ParallelBus.h
new file mode 100644
index 000000000..45989d990
--- /dev/null
+++ b/ports/raspberrypi/common-hal/displayio/ParallelBus.h
@@ -0,0 +1,36 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_DISPLAYIO_PARALLELBUS_H
+#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_DISPLAYIO_PARALLELBUS_H
+
+#include "common-hal/digitalio/DigitalInOut.h"
+
+typedef struct {
+    mp_obj_base_t base;
+} displayio_parallelbus_obj_t;
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_DISPLAYIO_PARALLELBUS_H
diff --git a/ports/raspberrypi/common-hal/microcontroller/Pin.c b/ports/raspberrypi/common-hal/microcontroller/Pin.c
new file mode 100644
index 000000000..90c327406
--- /dev/null
+++ b/ports/raspberrypi/common-hal/microcontroller/Pin.c
@@ -0,0 +1,190 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/runtime.h"
+
+#include "shared-bindings/microcontroller/Pin.h"
+
+#include "supervisor/shared/rgb_led_status.h"
+
+#include "src/rp2_common/hardware_gpio/include/hardware/gpio.h"
+
+#ifdef MICROPY_HW_NEOPIXEL
+bool neopixel_in_use;
+#endif
+#ifdef MICROPY_HW_APA102_MOSI
+bool apa102_sck_in_use;
+bool apa102_mosi_in_use;
+#endif
+#ifdef SPEAKER_ENABLE_PIN
+bool speaker_enable_in_use;
+#endif
+
+STATIC uint32_t never_reset_pins;
+
+void reset_all_pins(void) {
+    for (size_t i = 0; i < 30; i++) {
+        if ((never_reset_pins & (1 << i)) != 0) {
+            continue;
+        }
+        reset_pin_number(i);
+    }
+}
+
+void never_reset_pin_number(uint8_t pin_number) {
+    if (pin_number >= 32) {
+        return;
+    }
+
+    never_reset_pins |= 1 << pin_number;
+}
+
+void reset_pin_number(uint8_t pin_number) {
+    if (pin_number >= 32
+#if TUD_OPT_RP2040_USB_DEVICE_ENUMERATION_FIX
+    // Pin 15 is used for Errata so we don't mess with it.
+        || pin_number == 15
+#endif
+        ) {
+        return;
+    }
+
+    never_reset_pins &= ~(1 << pin_number);
+
+    // We are very aggressive in shutting down the pad fully. Both pulls are
+    // disabled and both buffers are as well.
+    gpio_init(pin_number);
+    hw_clear_bits(&padsbank0_hw->io[pin_number], PADS_BANK0_GPIO0_IE_BITS |
+                                                 PADS_BANK0_GPIO0_PUE_BITS |
+                                                 PADS_BANK0_GPIO0_PDE_BITS);
+    hw_set_bits(&padsbank0_hw->io[pin_number], PADS_BANK0_GPIO0_OD_BITS);
+
+    #ifdef MICROPY_HW_NEOPIXEL
+    if (pin_number == MICROPY_HW_NEOPIXEL->number) {
+        neopixel_in_use = false;
+        rgb_led_status_init();
+        return;
+    }
+    #endif
+    #ifdef MICROPY_HW_APA102_MOSI
+    if (pin_number == MICROPY_HW_APA102_MOSI->number ||
+        pin_number == MICROPY_HW_APA102_SCK->number) {
+        apa102_mosi_in_use = apa102_mosi_in_use && pin_number != MICROPY_HW_APA102_MOSI->number;
+        apa102_sck_in_use = apa102_sck_in_use && pin_number != MICROPY_HW_APA102_SCK->number;
+        if (!apa102_sck_in_use && !apa102_mosi_in_use) {
+            rgb_led_status_init();
+        }
+        return;
+    }
+    #endif
+
+    #ifdef SPEAKER_ENABLE_PIN
+    if (pin_number == SPEAKER_ENABLE_PIN->number) {
+        speaker_enable_in_use = false;
+    }
+    #endif
+}
+
+void common_hal_never_reset_pin(const mcu_pin_obj_t* pin) {
+    never_reset_pin_number(pin->number);
+}
+
+void common_hal_reset_pin(const mcu_pin_obj_t* pin) {
+    reset_pin_number(pin->number);
+}
+
+void claim_pin(const mcu_pin_obj_t* pin) {
+    #ifdef MICROPY_HW_NEOPIXEL
+    if (pin == MICROPY_HW_NEOPIXEL) {
+        neopixel_in_use = true;
+    }
+    #endif
+    #ifdef MICROPY_HW_APA102_MOSI
+    if (pin == MICROPY_HW_APA102_MOSI) {
+        apa102_mosi_in_use = true;
+    }
+    if (pin == MICROPY_HW_APA102_SCK) {
+        apa102_sck_in_use = true;
+    }
+    #endif
+
+    #ifdef SPEAKER_ENABLE_PIN
+    if (pin == SPEAKER_ENABLE_PIN) {
+        speaker_enable_in_use = true;
+    }
+    #endif
+}
+
+bool pin_number_is_free(uint8_t pin_number) {
+    if (pin_number >= 30) {
+        return false;
+    }
+#if TUD_OPT_RP2040_USB_DEVICE_ENUMERATION_FIX
+    // Pin 15 is used for Errata so we don't mess with it.
+    if (pin_number == 15) {
+        return true;
+    }
+#endif
+    uint32_t pad_state = padsbank0_hw->io[pin_number];
+    return (pad_state & PADS_BANK0_GPIO0_IE_BITS) == 0 &&
+           (pad_state & PADS_BANK0_GPIO0_OD_BITS) != 0;
+}
+
+bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t* pin) {
+    #ifdef MICROPY_HW_NEOPIXEL
+    if (pin == MICROPY_HW_NEOPIXEL) {
+        return !neopixel_in_use;
+    }
+    #endif
+    #ifdef MICROPY_HW_APA102_MOSI
+    if (pin == MICROPY_HW_APA102_MOSI) {
+        return !apa102_mosi_in_use;
+    }
+    if (pin == MICROPY_HW_APA102_SCK) {
+        return !apa102_sck_in_use;
+    }
+    #endif
+
+    #ifdef SPEAKER_ENABLE_PIN
+    if (pin == SPEAKER_ENABLE_PIN) {
+        return !speaker_enable_in_use;
+    }
+    #endif
+
+    return pin_number_is_free(pin->number);
+}
+
+uint8_t common_hal_mcu_pin_number(const mcu_pin_obj_t* pin) {
+    return pin->number;
+}
+
+void common_hal_mcu_pin_claim(const mcu_pin_obj_t* pin) {
+    return claim_pin(pin);
+}
+
+void common_hal_mcu_pin_reset_number(uint8_t pin_no) {
+    reset_pin_number(pin_no);
+}
diff --git a/ports/raspberrypi/common-hal/microcontroller/Pin.h b/ports/raspberrypi/common-hal/microcontroller/Pin.h
new file mode 100644
index 000000000..07c321185
--- /dev/null
+++ b/ports/raspberrypi/common-hal/microcontroller/Pin.h
@@ -0,0 +1,53 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_MICROCONTROLLER_PIN_H
+#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_MICROCONTROLLER_PIN_H
+
+#include <assert.h>
+#include <stdint.h>
+
+#include <py/obj.h>
+
+#include "peripherals/pins.h"
+
+#ifdef MICROPY_HW_NEOPIXEL
+extern bool neopixel_in_use;
+#endif
+#ifdef MICROPY_HW_APA102_MOSI
+extern bool apa102_sck_in_use;
+extern bool apa102_mosi_in_use;
+#endif
+
+void reset_all_pins(void);
+// reset_pin_number takes the pin number instead of the pointer so that objects don't
+// need to store a full pointer.
+void reset_pin_number(uint8_t pin_number);
+void never_reset_pin_number(uint8_t pin_number);
+void claim_pin(const mcu_pin_obj_t* pin);
+bool pin_number_is_free(uint8_t pin_number);
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_MICROCONTROLLER_PIN_H
diff --git a/ports/raspberrypi/common-hal/microcontroller/Processor.c b/ports/raspberrypi/common-hal/microcontroller/Processor.c
new file mode 100644
index 000000000..0ad3a51e2
--- /dev/null
+++ b/ports/raspberrypi/common-hal/microcontroller/Processor.c
@@ -0,0 +1,66 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <math.h>
+
+#include "py/mphal.h"
+#include "common-hal/microcontroller/Processor.h"
+#include "shared-bindings/microcontroller/ResetReason.h"
+
+#include "src/rp2_common/hardware_adc/include/hardware/adc.h"
+#include "src/rp2_common/hardware_clocks/include/hardware/clocks.h"
+
+float common_hal_mcu_processor_get_temperature(void) {
+    adc_init();
+    adc_set_temp_sensor_enabled(true);
+    adc_select_input(4);
+    uint16_t value = adc_read();
+    adc_set_temp_sensor_enabled(false);
+    float voltage = value * 3.3 / (1 << 12);
+    // TODO: turn the ADC back off
+    return 27 - (voltage - 0.706) / 0.001721;
+}
+
+float common_hal_mcu_processor_get_voltage(void) {
+    return 3.3f;
+}
+
+uint32_t common_hal_mcu_processor_get_frequency(void) {
+    return clock_get_hz(clk_sys);
+}
+
+void common_hal_mcu_processor_get_uid(uint8_t raw_id[]) {
+    // TODO: get the unique id from the flash. The chip itself doesn't have one.
+    // for (int i=0; i<4; i++) {
+    //     for (int k=0; k<4; k++) {
+    //         raw_id[4 * i + k] = (*(id_addresses[i]) >> k * 8) & 0xff;
+    //     }
+    // }
+}
+
+mcu_reset_reason_t common_hal_mcu_processor_get_reset_reason(void) {
+    return RESET_REASON_UNKNOWN;
+}
diff --git a/ports/raspberrypi/common-hal/microcontroller/Processor.h b/ports/raspberrypi/common-hal/microcontroller/Processor.h
new file mode 100644
index 000000000..b7c86e850
--- /dev/null
+++ b/ports/raspberrypi/common-hal/microcontroller/Processor.h
@@ -0,0 +1,39 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_MICROCONTROLLER_PROCESSOR_H
+#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_MICROCONTROLLER_PROCESSOR_H
+
+#define COMMON_HAL_MCU_PROCESSOR_UID_LENGTH 16
+
+#include "py/obj.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    // Stores no state currently.
+} mcu_processor_obj_t;
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_MICROCONTROLLER_PROCESSOR_H
diff --git a/ports/raspberrypi/common-hal/microcontroller/__init__.c b/ports/raspberrypi/common-hal/microcontroller/__init__.c
new file mode 100644
index 000000000..e454ffa1b
--- /dev/null
+++ b/ports/raspberrypi/common-hal/microcontroller/__init__.c
@@ -0,0 +1,148 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/mphal.h"
+#include "py/obj.h"
+#include "py/runtime.h"
+
+#include "common-hal/microcontroller/__init__.h"
+#if CIRCUITPY_NVM
+#include "shared-bindings/nvm/ByteArray.h"
+#endif
+#include "shared-bindings/microcontroller/__init__.h"
+#include "shared-bindings/microcontroller/Pin.h"
+#include "shared-bindings/microcontroller/Processor.h"
+#include "supervisor/shared/safe_mode.h"
+#include "supervisor/shared/translate.h"
+
+#include "src/rp2040/hardware_structs/include/hardware/structs/sio.h"
+#include "src/rp2_common/hardware_sync/include/hardware/sync.h"
+
+void common_hal_mcu_delay_us(uint32_t delay) {
+    mp_hal_delay_us(delay);
+}
+
+volatile uint32_t nesting_count = 0;
+void common_hal_mcu_disable_interrupts(void) {
+    // We don't use save_and_disable_interrupts() from the sdk because we don't want to worry about PRIMASK.
+    // This is what we do on the SAMD21 via CMSIS.
+    asm volatile ("cpsid i" : : : "memory");
+    __dmb();
+    nesting_count++;
+}
+
+void common_hal_mcu_enable_interrupts(void) {
+    if (nesting_count == 0) {
+        // reset_into_safe_mode(LOCKING_ERROR);
+    }
+    nesting_count--;
+    if (nesting_count > 0) {
+        return;
+    }
+    __dmb();
+    asm volatile ("cpsie i" : : : "memory");
+}
+
+void common_hal_mcu_on_next_reset(mcu_runmode_t runmode) {
+    if (runmode == RUNMODE_BOOTLOADER) {
+    } else {
+    }
+    if (runmode == RUNMODE_SAFE_MODE) {
+        safe_mode_on_next_reset(PROGRAMMATIC_SAFE_MODE);
+    }
+}
+
+void common_hal_mcu_reset(void) {
+}
+
+// The singleton microcontroller.Processor object, bound to microcontroller.cpu
+// It currently only has properties, and no state.
+static const mcu_processor_obj_t processor0 = {
+    .base = {
+        .type = &mcu_processor_type,
+    },
+};
+
+static const mcu_processor_obj_t processor1 = {
+    .base = {
+        .type = &mcu_processor_type,
+    },
+};
+
+const mp_rom_obj_tuple_t common_hal_mcu_processor_obj = {
+    {&mp_type_tuple},
+    CIRCUITPY_PROCESSOR_COUNT,
+    {
+        MP_ROM_PTR(&processor0),
+        MP_ROM_PTR(&processor1)
+    }
+};
+
+#if CIRCUITPY_NVM && CIRCUITPY_INTERNAL_NVM_SIZE > 0
+// The singleton nvm.ByteArray object.
+const nvm_bytearray_obj_t common_hal_mcu_nvm_obj = {
+    .base = {
+        .type = &nvm_bytearray_type,
+    },
+    .len = CIRCUITPY_INTERNAL_NVM_SIZE,
+    .start_address = (uint8_t*) (CIRCUITPY_INTERNAL_NVM_START_ADDR)
+};
+#endif
+
+// This maps MCU pin names to pin objects.
+const mp_rom_map_elem_t mcu_pin_global_dict_table[TOTAL_GPIO_COUNT] = {
+    { MP_ROM_QSTR(MP_QSTR_GPIO0), MP_ROM_PTR(&pin_GPIO0) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO1), MP_ROM_PTR(&pin_GPIO1) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO2), MP_ROM_PTR(&pin_GPIO2) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO3), MP_ROM_PTR(&pin_GPIO3) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO4), MP_ROM_PTR(&pin_GPIO4) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO5), MP_ROM_PTR(&pin_GPIO5) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO6), MP_ROM_PTR(&pin_GPIO6) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO7), MP_ROM_PTR(&pin_GPIO7) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO8), MP_ROM_PTR(&pin_GPIO8) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO9), MP_ROM_PTR(&pin_GPIO9) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO10), MP_ROM_PTR(&pin_GPIO10) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO11), MP_ROM_PTR(&pin_GPIO11) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO12), MP_ROM_PTR(&pin_GPIO12) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO13), MP_ROM_PTR(&pin_GPIO13) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO14), MP_ROM_PTR(&pin_GPIO14) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO15), MP_ROM_PTR(&pin_GPIO15) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO16), MP_ROM_PTR(&pin_GPIO16) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO17), MP_ROM_PTR(&pin_GPIO17) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO18), MP_ROM_PTR(&pin_GPIO18) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO19), MP_ROM_PTR(&pin_GPIO19) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO20), MP_ROM_PTR(&pin_GPIO20) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO21), MP_ROM_PTR(&pin_GPIO21) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO22), MP_ROM_PTR(&pin_GPIO22) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO23), MP_ROM_PTR(&pin_GPIO23) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO24), MP_ROM_PTR(&pin_GPIO24) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO25), MP_ROM_PTR(&pin_GPIO25) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO26), MP_ROM_PTR(&pin_GPIO26) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO27), MP_ROM_PTR(&pin_GPIO27) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO28), MP_ROM_PTR(&pin_GPIO28) },
+    { MP_ROM_QSTR(MP_QSTR_GPIO29), MP_ROM_PTR(&pin_GPIO29) },
+};
+MP_DEFINE_CONST_DICT(mcu_pin_globals, mcu_pin_global_dict_table);
diff --git a/ports/raspberrypi/common-hal/microcontroller/__init__.h b/ports/raspberrypi/common-hal/microcontroller/__init__.h
new file mode 100644
index 000000000..cc509b6b1
--- /dev/null
+++ b/ports/raspberrypi/common-hal/microcontroller/__init__.h
@@ -0,0 +1,36 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_MICROCONTROLLER___INIT___H
+#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_MICROCONTROLLER___INIT___H
+
+#include "src/rp2040/hardware_regs/include/hardware/platform_defs.h"
+
+#define TOTAL_GPIO_COUNT NUM_BANK0_GPIOS
+
+extern const mp_rom_map_elem_t mcu_pin_global_dict_table[TOTAL_GPIO_COUNT];
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_MICROCONTROLLER___INIT___H
diff --git a/ports/raspberrypi/common-hal/neopixel_write/__init__.c b/ports/raspberrypi/common-hal/neopixel_write/__init__.c
new file mode 100644
index 000000000..10462b5a3
--- /dev/null
+++ b/ports/raspberrypi/common-hal/neopixel_write/__init__.c
@@ -0,0 +1,95 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "shared-bindings/neopixel_write/__init__.h"
+
+#include "bindings/rp2pio/StateMachine.h"
+#include "common-hal/rp2pio/StateMachine.h"
+#include "shared-bindings/microcontroller/__init__.h"
+
+#include "supervisor/port.h"
+
+uint64_t next_start_raw_ticks = 0;
+
+// NeoPixels are 800khz bit streams. Zeroes are 1/3 duty cycle (~416ns) and ones
+// are 2/3 duty cycle (~833ns). Each of the instructions below take 1/3 duty
+// cycle. The first two instructions always run while only one of the two final
+// instructions run per bit. We start with the low period because it can be
+// longer than 1/3 period while waiting for more data.
+const uint16_t neopixel_program[] = {
+// bitloop:
+//   out x 1        side 0 [1]; Side-set still takes place before instruction stalls
+    0x6121,
+//   jmp !x do_zero side 1 [1]; Branch on the bit we shifted out after 1/3 duty delay. Positive pulse
+    0x1123,
+// do_one:
+//   jmp  bitloop   side 1 [1]; Continue driving high, for a long pulse
+    0x1100,
+// do_zero:
+//   nop            side 0 [1]; Or drive low, for a short pulse
+    0xa142
+};
+
+const uint16_t init_program[] = {
+    0xe081
+};
+
+void common_hal_neopixel_write(const digitalio_digitalinout_obj_t* digitalinout, uint8_t *pixels, uint32_t num_bytes) {
+    // Set everything up.
+    rp2pio_statemachine_obj_t state_machine;
+
+    // TODO: Cache the state machine after we create it once. We'll need a way to
+    // change the pins then though.
+    uint8_t pin_number = digitalinout->pin->number;
+    bool ok = rp2pio_statemachine_construct(&state_machine,
+        neopixel_program, sizeof(neopixel_program) / sizeof(neopixel_program[0]),
+        800000 * 6, // 800 khz * 6 cycles per bit
+        init_program, 1,
+        NULL, 1,
+        NULL, 1,
+        digitalinout->pin, 1,
+        digitalinout->pin, 1,
+        1 << pin_number, true, false,
+        true, 8, false, // TX, auto pull every 8 bits. shift left to output msb first
+        false, 32, true, // RX setting we don't use
+        false); // claim pins
+    if (!ok) {
+        // Do nothing. Maybe bitbang?
+        return;
+    }
+
+    // Wait to make sure we don't append onto the last transmission. This should only be a tick or
+    // two.
+    while (port_get_raw_ticks(NULL) < next_start_raw_ticks) {}
+
+    common_hal_rp2pio_statemachine_write(&state_machine, pixels, num_bytes);
+
+    // Use a private deinit of the state machine that doesn't reset the pin.
+    rp2pio_statemachine_deinit(&state_machine, true);
+    gpio_init(digitalinout->pin->number);
+    // Update the next start.
+    next_start_raw_ticks = port_get_raw_ticks(NULL) + 1;
+}
diff --git a/ports/raspberrypi/common-hal/os/__init__.c b/ports/raspberrypi/common-hal/os/__init__.c
new file mode 100644
index 000000000..dcbd06e93
--- /dev/null
+++ b/ports/raspberrypi/common-hal/os/__init__.c
@@ -0,0 +1,62 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "genhdr/mpversion.h"
+#include "py/mpconfig.h"
+#include "py/objstr.h"
+#include "py/objtuple.h"
+#include "py/qstr.h"
+
+
+STATIC const qstr os_uname_info_fields[] = {
+    MP_QSTR_sysname, MP_QSTR_nodename,
+    MP_QSTR_release, MP_QSTR_version, MP_QSTR_machine
+};
+STATIC const MP_DEFINE_STR_OBJ(os_uname_info_sysname_obj, "rp2040");
+STATIC const MP_DEFINE_STR_OBJ(os_uname_info_nodename_obj, "rp2040");
+STATIC const MP_DEFINE_STR_OBJ(os_uname_info_release_obj, MICROPY_VERSION_STRING);
+STATIC const MP_DEFINE_STR_OBJ(os_uname_info_version_obj, MICROPY_GIT_TAG " on " MICROPY_BUILD_DATE);
+STATIC const MP_DEFINE_STR_OBJ(os_uname_info_machine_obj, MICROPY_HW_BOARD_NAME " with " MICROPY_HW_MCU_NAME);
+
+
+STATIC MP_DEFINE_ATTRTUPLE(
+    os_uname_info_obj,
+    os_uname_info_fields,
+    5,
+    (mp_obj_t)&os_uname_info_sysname_obj,
+    (mp_obj_t)&os_uname_info_nodename_obj,
+    (mp_obj_t)&os_uname_info_release_obj,
+    (mp_obj_t)&os_uname_info_version_obj,
+    (mp_obj_t)&os_uname_info_machine_obj
+);
+
+mp_obj_t common_hal_os_uname(void) {
+    return (mp_obj_t)&os_uname_info_obj;
+}
+
+bool common_hal_os_urandom(uint8_t* buffer, uint32_t length) {
+    return false;
+}
diff --git a/ports/raspberrypi/common-hal/pwmio/PWMOut.c b/ports/raspberrypi/common-hal/pwmio/PWMOut.c
new file mode 100644
index 000000000..567ec5ef5
--- /dev/null
+++ b/ports/raspberrypi/common-hal/pwmio/PWMOut.c
@@ -0,0 +1,216 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdint.h>
+
+#include "py/runtime.h"
+#include "common-hal/pwmio/PWMOut.h"
+#include "shared-bindings/pwmio/PWMOut.h"
+#include "shared-bindings/microcontroller/Processor.h"
+
+#include "supervisor/shared/translate.h"
+
+#include "src/rp2040/hardware_regs/include/hardware/platform_defs.h"
+#include "src/rp2_common/hardware_clocks/include/hardware/clocks.h"
+#include "src/rp2_common/hardware_gpio/include/hardware/gpio.h"
+#include "src/rp2_common/hardware_pwm/include/hardware/pwm.h"
+
+uint32_t target_slice_frequencies[NUM_PWM_SLICES];
+uint32_t slice_fixed_frequency;
+
+#define CHANNELS_PER_SLICE 2
+static uint32_t channel_use;
+static uint32_t never_reset_channel;
+
+static uint32_t _mask(uint8_t slice, uint8_t channel) {
+    return 1 << (slice * CHANNELS_PER_SLICE + channel);
+}
+
+void common_hal_pwmio_pwmout_never_reset(pwmio_pwmout_obj_t *self) {
+    never_reset_channel |= _mask(self->slice, self->channel);
+
+    never_reset_pin_number(self->pin->number);
+}
+
+void common_hal_pwmio_pwmout_reset_ok(pwmio_pwmout_obj_t *self) {
+    never_reset_channel &= ~_mask(self->slice, self->channel);
+}
+
+void pwmout_reset(void) {
+    // Reset all slices
+    for (size_t slice = 0; slice < NUM_PWM_SLICES; slice++) {
+        bool reset = true;
+        for (size_t channel = 0; channel < CHANNELS_PER_SLICE; channel++) {
+            uint32_t channel_use_mask = _mask(slice, channel);
+            if ((never_reset_channel & channel_use_mask) != 0) {
+                reset = false;
+                continue;
+            }
+            channel_use &= ~channel_use_mask;
+        }
+        if (!reset) {
+            continue;
+        }
+        pwm_set_enabled(slice, false);
+        target_slice_frequencies[slice] = 0;
+        slice_fixed_frequency &= ~(1 << slice);
+    }
+}
+
+pwmout_result_t common_hal_pwmio_pwmout_construct(pwmio_pwmout_obj_t* self,
+                                                    const mcu_pin_obj_t* pin,
+                                                    uint16_t duty,
+                                                    uint32_t frequency,
+                                                    bool variable_frequency) {
+    self->pin = pin;
+    self->variable_frequency = variable_frequency;
+    self->duty_cycle = duty;
+
+    if (frequency == 0 || frequency > (common_hal_mcu_processor_get_frequency() / 2)) {
+        return PWMOUT_INVALID_FREQUENCY;
+    }
+
+    uint8_t slice = pwm_gpio_to_slice_num(pin->number);
+    uint8_t channel = pwm_gpio_to_channel(pin->number);
+    uint32_t channel_use_mask = _mask(slice, channel);
+
+    // Check the channel first.
+    if ((channel_use & channel_use_mask) != 0) {
+        return PWMOUT_ALL_TIMERS_ON_PIN_IN_USE;
+    }
+    // Now check if the slice is in use and if we can share with it.
+    if (target_slice_frequencies[slice] > 0) {
+        // If we want to change frequency then we can't share.
+        if (variable_frequency) {
+            return PWMOUT_ALL_TIMERS_ON_PIN_IN_USE;
+        }
+        // If the other user wants to change frequency then we can't share either.
+        if ((slice_fixed_frequency & (1 << slice)) != 0) {
+            return PWMOUT_ALL_TIMERS_ON_PIN_IN_USE;
+        }
+        // If we're both fixed frequency but we don't match target frequencies then we can't share.
+        if (target_slice_frequencies[slice] != frequency) {
+            return PWMOUT_ALL_TIMERS_ON_PIN_IN_USE;
+        }
+    }
+    self->slice = slice;
+    self->channel = channel;
+    channel_use |= channel_use_mask;
+    if (!variable_frequency) {
+        slice_fixed_frequency |= 1 << slice;
+    }
+
+    if (target_slice_frequencies[slice] != frequency) {
+        // Reset the counter and compare values.
+        pwm_hw->slice[slice].ctr = PWM_CH0_CTR_RESET;
+        common_hal_pwmio_pwmout_set_duty_cycle(self, duty);
+        common_hal_pwmio_pwmout_set_frequency(self, frequency);
+        pwm_set_enabled(slice, true);
+    } else {
+        common_hal_pwmio_pwmout_set_duty_cycle(self, duty);
+    }
+
+    // Connect to the pad last to avoid any glitches from changing settings.
+    gpio_set_function(pin->number, GPIO_FUNC_PWM);
+
+    return PWMOUT_OK;
+}
+
+bool common_hal_pwmio_pwmout_deinited(pwmio_pwmout_obj_t* self) {
+    return self->pin == NULL;
+}
+
+void common_hal_pwmio_pwmout_deinit(pwmio_pwmout_obj_t* self) {
+    if (common_hal_pwmio_pwmout_deinited(self)) {
+        return;
+    }
+    uint32_t channel_mask = _mask(self->slice, self->channel);
+    channel_use &= ~channel_mask;
+    never_reset_channel &= ~channel_mask;
+    uint32_t slice_mask = ((1 << CHANNELS_PER_SLICE) - 1) << (self->slice * CHANNELS_PER_SLICE + self->channel);
+    if ((channel_use & slice_mask) == 0) {
+        target_slice_frequencies[self->slice] = 0;
+        slice_fixed_frequency &= ~(1 << self->slice);
+        pwm_set_enabled(self->slice, false);
+    }
+
+    reset_pin_number(self->pin->number);
+    self->pin = NULL;
+}
+
+extern void common_hal_pwmio_pwmout_set_duty_cycle(pwmio_pwmout_obj_t* self, uint16_t duty) {
+    self->duty_cycle = duty;
+    uint16_t actual_duty = duty * self->top / ((1 << 16) - 1);
+    pwm_set_chan_level(self->slice, self->channel, actual_duty);
+}
+
+uint16_t common_hal_pwmio_pwmout_get_duty_cycle(pwmio_pwmout_obj_t* self) {
+    return self->duty_cycle;
+}
+
+void common_hal_pwmio_pwmout_set_frequency(pwmio_pwmout_obj_t* self, uint32_t frequency) {
+    if (frequency == 0 || frequency > (common_hal_mcu_processor_get_frequency() / 2)) {
+        mp_raise_ValueError(translate("Invalid PWM frequency"));
+    }
+
+    target_slice_frequencies[self->slice] = frequency;
+
+    // For low frequencies use the divider to give us full resolution duty_cycle.
+    if (frequency < (common_hal_mcu_processor_get_frequency() / (1 << 16))) {
+        // Compute the divisor. It's an 8 bit integer and 4 bit fraction. Therefore,
+        // we compute everything * 16 for the fractional part.
+        // This is 1 << 12 because 4 bits are the * 16.
+        uint64_t frequency16 = ((uint64_t) clock_get_hz(clk_sys)) / (1 << 12);
+        uint64_t div16 = frequency16 / frequency;
+        // Round the divisor to try and get closest to the target frequency. We could
+        // also always round up and use TOP to get us closer. We may not need that though.
+        if (frequency16 % frequency >= frequency / 2) {
+            div16 += 1;
+        }
+        if (div16 >= (1 << 12)) {
+            div16 = (1 << 12) - 1;
+        }
+        self->actual_frequency = frequency16 / div16;
+        self->top = 1 << 16;
+        pwm_set_clkdiv_int_frac(self->slice, div16 / 16, div16 % 16);
+        pwm_set_wrap(self->slice, self->top - 1);
+    } else {
+        uint32_t top = common_hal_mcu_processor_get_frequency() / frequency;
+        self->actual_frequency = common_hal_mcu_processor_get_frequency() / top;
+        self->top = top;
+        pwm_set_clkdiv_int_frac(self->slice, 1, 0);
+        pwm_set_wrap(self->slice, self->top - 1);
+    }
+    common_hal_pwmio_pwmout_set_duty_cycle(self, self->duty_cycle);
+}
+
+uint32_t common_hal_pwmio_pwmout_get_frequency(pwmio_pwmout_obj_t* self) {
+    return self->actual_frequency;
+}
+
+bool common_hal_pwmio_pwmout_get_variable_frequency(pwmio_pwmout_obj_t* self) {
+    return self->variable_frequency;
+}
diff --git a/ports/raspberrypi/common-hal/pwmio/PWMOut.h b/ports/raspberrypi/common-hal/pwmio/PWMOut.h
new file mode 100644
index 000000000..50f84777b
--- /dev/null
+++ b/ports/raspberrypi/common-hal/pwmio/PWMOut.h
@@ -0,0 +1,47 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_PWMIO_PWMOUT_H
+#define MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_PWMIO_PWMOUT_H
+
+#include "common-hal/microcontroller/Pin.h"
+
+#include "py/obj.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    const mcu_pin_obj_t *pin;
+    uint8_t slice;
+    uint8_t channel;
+    bool variable_frequency;
+    uint16_t duty_cycle;
+    uint32_t actual_frequency;
+    uint32_t top;
+} pwmio_pwmout_obj_t;
+
+void pwmout_reset(void);
+
+#endif // MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_PWMIO_PWMOUT_H
diff --git a/ports/raspberrypi/common-hal/pwmio/__init__.c b/ports/raspberrypi/common-hal/pwmio/__init__.c
new file mode 100644
index 000000000..9e551a107
--- /dev/null
+++ b/ports/raspberrypi/common-hal/pwmio/__init__.c
@@ -0,0 +1 @@
+// No pwmio module functions.
diff --git a/ports/raspberrypi/common-hal/rp2pio/StateMachine.c b/ports/raspberrypi/common-hal/rp2pio/StateMachine.c
new file mode 100644
index 000000000..6510410b0
--- /dev/null
+++ b/ports/raspberrypi/common-hal/rp2pio/StateMachine.c
@@ -0,0 +1,585 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "bindings/rp2pio/StateMachine.h"
+
+#include "common-hal/microcontroller/__init__.h"
+#include "shared-bindings/microcontroller/Pin.h"
+
+#include "src/rp2040/hardware_regs/include/hardware/platform_defs.h"
+#include "src/rp2_common/hardware_clocks/include/hardware/clocks.h"
+#include "src/rp2_common/hardware_dma/include/hardware/dma.h"
+#include "src/rp2_common/hardware_pio/include/hardware/pio_instructions.h"
+#include "src/rp2040/hardware_structs/include/hardware/structs/iobank0.h"
+
+#include "lib/utils/interrupt_char.h"
+#include "py/obj.h"
+#include "py/objproperty.h"
+#include "py/runtime.h"
+
+// Count how many state machines are using each pin.
+STATIC uint8_t _pin_reference_count[TOTAL_GPIO_COUNT];
+STATIC uint32_t _current_program_id[NUM_PIOS][NUM_PIO_STATE_MACHINES];
+STATIC uint8_t _current_program_offset[NUM_PIOS][NUM_PIO_STATE_MACHINES];
+STATIC uint8_t _current_program_len[NUM_PIOS][NUM_PIO_STATE_MACHINES];
+STATIC bool _never_reset[NUM_PIOS][NUM_PIO_STATE_MACHINES];
+
+STATIC uint32_t _current_pins[NUM_PIOS];
+STATIC uint32_t _current_sm_pins[NUM_PIOS][NUM_PIO_STATE_MACHINES];
+
+STATIC PIO pio_instances[2] = {pio0, pio1};
+
+void _reset_statemachine(PIO pio, uint8_t sm, bool leave_pins) {
+    uint8_t pio_index = pio_get_index(pio);
+    pio_sm_unclaim(pio, sm);
+    uint32_t program_id = _current_program_id[pio_index][sm];
+    if (program_id == 0) {
+        return;
+    }
+    _current_program_id[pio_index][sm] = 0;
+    bool program_in_use = false;
+    for (size_t i = 0; i < NUM_PIO_STATE_MACHINES; i++) {
+        if (_current_program_id[pio_index][i] == program_id) {
+            program_in_use = true;
+            break;
+        }
+    }
+    if (!program_in_use) {
+        uint8_t offset = _current_program_offset[pio_index][sm];
+        pio_program_t program_struct = {
+            .length = _current_program_len[pio_index][sm]
+        };
+        pio_remove_program(pio, &program_struct, offset);
+    }
+
+    uint32_t pins = _current_sm_pins[pio_index][sm];
+    for (size_t pin_number = 0; pin_number < TOTAL_GPIO_COUNT; pin_number++) {
+        if ((pins & (1 << pin_number)) == 0) {
+            continue;
+        }
+        _pin_reference_count[pin_number]--;
+        if (_pin_reference_count[pin_number] == 0) {
+            if (!leave_pins) {
+                reset_pin_number(pin_number);
+            }
+            _current_pins[pio_index] &= ~(1 << pin_number);
+        }
+    }
+    _current_sm_pins[pio_index][sm] = 0;
+}
+
+void reset_rp2pio_statemachine(void) {
+    for (size_t i = 0; i < NUM_PIOS; i++) {
+        PIO pio = pio_instances[i];
+        for (size_t j = 0; j < NUM_PIO_STATE_MACHINES; j++) {
+            if (_never_reset[i][j]) {
+                continue;
+            }
+            _reset_statemachine(pio, j, false);
+        }
+    }
+}
+
+STATIC uint32_t _check_pins_free(const mcu_pin_obj_t * first_pin, uint8_t pin_count, bool exclusive_pin_use) {
+    uint32_t pins_we_use = 0;
+    if (first_pin != NULL) {
+        for (size_t i = 0; i < pin_count; i++) {
+            uint8_t pin_number = first_pin->number + i;
+            if (pin_number >= TOTAL_GPIO_COUNT) {
+                mp_raise_ValueError(translate("Pin count too large"));
+            }
+            const mcu_pin_obj_t * pin = mcu_pin_global_dict_table[pin_number].value;
+            if (exclusive_pin_use || _pin_reference_count[pin_number] == 0) {
+                assert_pin_free(pin);
+            }
+            pins_we_use |= 1 << pin_number;
+        }
+    }
+    return pins_we_use;
+}
+
+
+bool rp2pio_statemachine_construct(rp2pio_statemachine_obj_t *self,
+    const uint16_t* program, size_t program_len,
+    size_t frequency,
+    const uint16_t* init, size_t init_len,
+    const mcu_pin_obj_t * first_out_pin, uint8_t out_pin_count,
+    const mcu_pin_obj_t * first_in_pin, uint8_t in_pin_count,
+    const mcu_pin_obj_t * first_set_pin, uint8_t set_pin_count,
+    const mcu_pin_obj_t * first_sideset_pin, uint8_t sideset_pin_count,
+    uint32_t pins_we_use, bool tx_fifo, bool rx_fifo,
+    bool auto_pull, uint8_t pull_threshold, bool out_shift_right,
+    bool auto_push, uint8_t push_threshold, bool in_shift_right,
+    bool claim_pins) {
+    // Create a program id that isn't the pointer so we can store it without storing the original object.
+    uint32_t program_id = ~((uint32_t) program);
+
+    // Next, find a PIO and state machine to use.
+    size_t pio_index = NUM_PIOS;
+    uint8_t program_offset = 32;
+    pio_program_t program_struct = {
+        .instructions = (uint16_t*) program,
+        .length = program_len,
+        .origin = 0
+    };
+    for (size_t i = 0; i < NUM_PIOS; i++) {
+        PIO pio = pio_instances[i];
+        uint8_t free_count = 0;
+        for (size_t j = 0; j < NUM_PIO_STATE_MACHINES; j++) {
+            if (_current_program_id[i][j] == program_id &&
+                _current_program_len[i][j] == program_len) {
+                program_offset = _current_program_offset[i][j];
+            }
+            int temp_claim = pio_claim_unused_sm(pio, false);
+            if (temp_claim >= 0) {
+                pio_sm_unclaim(pio, temp_claim);
+                free_count++;
+            }
+        }
+        if (free_count > 0 && (program_offset < 32 || pio_can_add_program(pio, &program_struct))) {
+            pio_index = i;
+            if (program_offset < 32) {
+                break;
+            }
+        }
+        // Reset program offset if we weren't able to find a free state machine
+        // on that PIO. (We would have broken the loop otherwise.)
+        program_offset = 32;
+    }
+
+    int state_machine = -1;
+    if (pio_index < NUM_PIOS) {
+        PIO pio = pio_instances[pio_index];
+        for (size_t i = 0; i < NUM_PIOS; i++) {
+            if (i == pio_index) {
+                continue;
+            }
+            if ((_current_pins[i] & pins_we_use) != 0) {
+                // Pin in use by another PIO already.
+                return false;
+            }
+        }
+        state_machine = pio_claim_unused_sm(pio, false);
+    }
+    if (pio_index == NUM_PIOS || state_machine < 0 || state_machine >= NUM_PIO_STATE_MACHINES) {
+        return false;
+    }
+
+    self->pio = pio_instances[pio_index];
+    self->state_machine = state_machine;
+    if (program_offset == 32) {
+        program_offset = pio_add_program(self->pio, &program_struct);
+    }
+    _current_program_id[pio_index][state_machine] = program_id;
+    _current_program_len[pio_index][state_machine] = program_len;
+    _current_program_offset[pio_index][state_machine] = program_offset;
+    _current_sm_pins[pio_index][state_machine] = pins_we_use;
+    _current_pins[pio_index] |= pins_we_use;
+
+    for (size_t pin_number = 0; pin_number < TOTAL_GPIO_COUNT; pin_number++) {
+        if ((pins_we_use & (1 << pin_number)) == 0) {
+            continue;
+        }
+        _pin_reference_count[pin_number]++;
+        const mcu_pin_obj_t * pin = mcu_pin_global_dict_table[pin_number].value;
+        // Also claim the pin at the top level when we're the first to grab it.
+        if (_pin_reference_count[pin_number] == 1) {
+            if (claim_pins) {
+                claim_pin(pin);
+            }
+            pio_gpio_init(self->pio, pin_number);
+        }
+    }
+
+    pio_sm_config c = {0, 0, 0};
+
+    if (frequency == 0) {
+        frequency = clock_get_hz(clk_sys);
+    }
+    uint64_t frequency256 = ((uint64_t) clock_get_hz(clk_sys)) * 256;
+    uint64_t div256 = frequency256 / frequency;
+    if (frequency256 % div256 > 0) {
+        div256 += 1;
+    }
+    self->actual_frequency = frequency256 / div256;
+    sm_config_set_clkdiv_int_frac(&c, div256 / 256, div256 % 256);
+
+    if (first_out_pin != NULL) {
+        sm_config_set_out_pins(&c, first_out_pin->number, out_pin_count);
+    }
+    if (first_in_pin != NULL) {
+        sm_config_set_in_pins(&c, first_in_pin->number);
+    }
+    if (first_set_pin != NULL) {
+        sm_config_set_set_pins(&c, first_set_pin->number, set_pin_count);
+    }
+    if (first_sideset_pin != NULL) {
+        sm_config_set_sideset(&c, sideset_pin_count, false /* optional */, false /* pin direction */);
+        sm_config_set_sideset_pins(&c, first_sideset_pin->number);
+    }
+    sm_config_set_wrap(&c, program_offset, program_offset + program_len - 1);
+    sm_config_set_in_shift(&c, in_shift_right, auto_push, push_threshold);
+    sm_config_set_out_shift(&c, out_shift_right, auto_pull, pull_threshold);
+
+    enum pio_fifo_join join = PIO_FIFO_JOIN_NONE;
+    if (!rx_fifo) {
+        join = PIO_FIFO_JOIN_TX;
+    } else if (!tx_fifo) {
+        join = PIO_FIFO_JOIN_RX;
+    }
+    if (rx_fifo) {
+        self->rx_dreq = pio_get_dreq(self->pio, self->state_machine, false);
+    }
+    if (tx_fifo) {
+        self->tx_dreq = pio_get_dreq(self->pio, self->state_machine, true);
+    }
+    self->in = rx_fifo;
+    self->out = tx_fifo;
+    self->out_shift_right = out_shift_right;
+    self->in_shift_right = in_shift_right;
+
+    sm_config_set_fifo_join(&c, join);
+
+    pio_sm_init(self->pio, self->state_machine, program_offset, &c);
+    pio_sm_set_enabled(self->pio, self->state_machine, true);
+    for (size_t i = 0; i < init_len; i++) {
+        pio_sm_exec(self->pio, self->state_machine, init[i]);
+    }
+    return true;
+}
+
+void common_hal_rp2pio_statemachine_construct(rp2pio_statemachine_obj_t *self,
+    const uint16_t* program, size_t program_len,
+    size_t frequency,
+    const uint16_t* init, size_t init_len,
+    const mcu_pin_obj_t * first_out_pin, uint8_t out_pin_count,
+    const mcu_pin_obj_t * first_in_pin, uint8_t in_pin_count,
+    const mcu_pin_obj_t * first_set_pin, uint8_t set_pin_count,
+    const mcu_pin_obj_t * first_sideset_pin, uint8_t sideset_pin_count,
+    bool exclusive_pin_use,
+    bool auto_pull, uint8_t pull_threshold, bool out_shift_right,
+    bool auto_push, uint8_t push_threshold, bool in_shift_right) {
+
+    // First, check that all pins are free OR already in use by any PIO if exclusive_pin_use is false.
+    uint32_t pins_we_use = 0;
+    pins_we_use |= _check_pins_free(first_out_pin, out_pin_count, exclusive_pin_use);
+    pins_we_use |= _check_pins_free(first_in_pin, in_pin_count, exclusive_pin_use);
+    pins_we_use |= _check_pins_free(first_set_pin, set_pin_count, exclusive_pin_use);
+    pins_we_use |= _check_pins_free(first_sideset_pin, sideset_pin_count, exclusive_pin_use);
+
+    // Look through the program to see what we reference and make sure it was provided.
+    bool tx_fifo = false;
+    bool rx_fifo = false;
+    bool in_loaded = false; // can be loaded in other ways besides the fifo
+    bool out_loaded = false;
+    bool in_used = false;
+    bool out_used = false;
+    for (size_t i = 0; i < program_len; i++) {
+        uint16_t full_instruction = program[i];
+        uint16_t instruction = full_instruction & 0xe000;
+        if (instruction == 0x8000) {
+            if ((full_instruction & 0xe080) == pio_instr_bits_push) {
+                rx_fifo = true;
+                in_loaded = true;
+            } else { // pull otherwise.
+                tx_fifo = true;
+                out_loaded = true;
+            }
+        }
+        if (instruction == pio_instr_bits_jmp) {
+            uint16_t condition = (full_instruction & 0x00e0) >> 5;
+            if (condition == 0x6) { // GPIO
+                mp_raise_NotImplementedError_varg(translate("Instruction %d jumps on pin"), i);
+            }
+        }
+        if (instruction == pio_instr_bits_wait) {
+            uint16_t wait_source = (full_instruction & 0x0060) >> 5;
+            uint16_t wait_index = full_instruction & 0x001f;
+            if (wait_source == 0 && (pins_we_use & (1 << wait_index)) == 0) { // GPIO
+                mp_raise_ValueError_varg(translate("Instruction %d uses extra pin"), i);
+            }
+            if (wait_source == 1) { // Input pin
+                if (first_in_pin == NULL) {
+                    mp_raise_ValueError_varg(translate("Missing first_in_pin. Instruction %d waits based on pin"), i);
+                }
+                if (wait_index > in_pin_count) {
+                    mp_raise_ValueError_varg(translate("Instruction %d waits on input outside of count"), i);
+                }
+            }
+        }
+        if (instruction == pio_instr_bits_in) {
+            uint16_t source = (full_instruction & 0x00e0) >> 5;
+            uint16_t bit_count = full_instruction & 0x001f;
+            if (source == 0) {
+                if (first_in_pin == NULL) {
+                    mp_raise_ValueError_varg(translate("Missing first_in_pin. Instruction %d shifts in from pin(s)"), i);
+                }
+                if (bit_count > in_pin_count) {
+                    mp_raise_ValueError_varg(translate("Instruction %d shifts in more bits than pin count"), i);
+                }
+            }
+            if (auto_push) {
+                in_loaded = true;
+                rx_fifo = true;
+            }
+            in_used = true;
+        }
+        if (instruction == pio_instr_bits_out) {
+            uint16_t bit_count = full_instruction & 0x001f;
+            uint16_t destination = (full_instruction & 0x00e0) >> 5;
+            // Check for pins or pindirs destination.
+            if (destination == 0x0 || destination == 0x4) {
+                if (first_out_pin == NULL) {
+                    mp_raise_ValueError_varg(translate("Missing first_out_pin. Instruction %d shifts out to pin(s)"), i);
+                }
+                if (bit_count > out_pin_count) {
+                    mp_raise_ValueError_varg(translate("Instruction %d shifts out more bits than pin count"), i);
+                }
+            }
+            if (auto_pull) {
+                out_loaded = true;
+                tx_fifo = true;
+            }
+            out_used = true;
+        }
+        if (instruction == pio_instr_bits_set) {
+            uint16_t destination = (full_instruction & 0x00e0) >> 5;
+            // Check for pins or pindirs destination.
+            if ((destination == 0x00 || destination == 0x4) && first_set_pin == NULL) {
+                mp_raise_ValueError_varg(translate("Missing first_set_pin. Instruction %d sets pin(s)"), i);
+            }
+        }
+        if (instruction == pio_instr_bits_mov) {
+            uint16_t source = full_instruction & 0x0007;
+            uint16_t destination = (full_instruction & 0x00e0) >> 5;
+            // Check for pins or pindirs destination.
+            if (destination == 0x0 && first_out_pin == NULL) {
+                mp_raise_ValueError_varg(translate("Missing first_out_pin. Instruction %d writes pin(s)"), i);
+            }
+            if (source == 0x0 && first_in_pin == NULL) {
+                mp_raise_ValueError_varg(translate("Missing first_in_pin. Instruction %d reads pin(s)"), i);
+            }
+            if (destination == 0x6) {
+                in_loaded = true;
+            } else if (destination == 0x7) {
+                out_loaded = true;
+            }
+        }
+    }
+
+    if (!in_loaded && in_used) {
+        mp_raise_ValueError_varg(translate("Program does IN without loading ISR"));
+    }
+    if (!out_loaded && out_used) {
+        mp_raise_ValueError_varg(translate("Program does OUT without loading OSR"));
+    }
+
+    if (in_pin_count > 8 || out_pin_count > 8) {
+        mp_raise_NotImplementedError(translate("Only IN/OUT of up to 8 supported"));
+    }
+
+    bool ok = rp2pio_statemachine_construct(self,
+        program, program_len,
+        frequency,
+        init, init_len,
+        first_out_pin, out_pin_count,
+        first_in_pin, in_pin_count,
+        first_set_pin, set_pin_count,
+        first_sideset_pin, sideset_pin_count,
+        pins_we_use, tx_fifo, rx_fifo,
+        auto_pull, pull_threshold, out_shift_right,
+        auto_push, push_threshold, in_shift_right,
+        true /* claim pins */);
+    if (!ok) {
+        mp_raise_RuntimeError(translate("All state machines in use"));
+    }
+}
+
+uint32_t common_hal_rp2pio_statemachine_get_frequency(rp2pio_statemachine_obj_t* self) {
+    return self->actual_frequency;
+}
+
+void rp2pio_statemachine_deinit(rp2pio_statemachine_obj_t *self, bool leave_pins) {
+    uint8_t sm = self->state_machine;
+    uint8_t pio_index = pio_get_index(self->pio);
+    _never_reset[pio_index][sm] = false;
+    _reset_statemachine(self->pio, sm, leave_pins);
+    self->state_machine = NUM_PIO_STATE_MACHINES;
+}
+
+void common_hal_rp2pio_statemachine_deinit(rp2pio_statemachine_obj_t *self) {
+    rp2pio_statemachine_deinit(self, false);
+}
+
+void common_hal_rp2pio_statemachine_never_reset(rp2pio_statemachine_obj_t *self) {
+    uint8_t sm = self->state_machine;
+    uint8_t pio_index = pio_get_index(self->pio);
+    _never_reset[pio_index][sm] = true;
+    // TODO: never reset all the pins
+}
+
+bool common_hal_rp2pio_statemachine_deinited(rp2pio_statemachine_obj_t *self) {
+    return self->state_machine == NUM_PIO_STATE_MACHINES;
+}
+
+static bool _transfer(rp2pio_statemachine_obj_t *self,
+    const uint8_t *data_out, size_t out_len,
+    uint8_t *data_in, size_t in_len) {
+    // This implementation is based on SPI but varies because the tx and rx buffers
+    // may be different lengths and occur at different times or speeds.
+
+    // Use DMA for large transfers if channels are available
+    const size_t dma_min_size_threshold = 32;
+    int chan_tx = -1;
+    int chan_rx = -1;
+    size_t len = MAX(out_len, in_len);
+    bool tx = data_out != NULL;
+    bool rx = data_in != NULL;
+    if (len >= dma_min_size_threshold) {
+        // Use DMA channels to service the two FIFOs
+        if (tx) {
+            chan_tx = dma_claim_unused_channel(false);
+        }
+        if (rx) {
+            chan_rx = dma_claim_unused_channel(false);
+        }
+    }
+    volatile uint8_t* tx_destination = NULL;
+    const volatile uint8_t* rx_source = NULL;
+    if (tx) {
+        tx_destination = (volatile uint8_t*) &self->pio->txf[self->state_machine];
+        if (!self->out_shift_right) {
+            tx_destination += 3;
+        }
+    }
+    if (rx) {
+        rx_source = (const volatile uint8_t*) &self->pio->rxf[self->state_machine];
+        if (!self->in_shift_right) {
+            rx_source += 3;
+        }
+    }
+    bool use_dma = (!rx || chan_rx >= 0) && (!tx || chan_tx >= 0);
+    if (use_dma) {
+        dma_channel_config c;
+        uint32_t channel_mask = 0;
+        if (tx) {
+            c = dma_channel_get_default_config(chan_tx);
+            channel_config_set_transfer_data_size(&c, DMA_SIZE_8);
+            channel_config_set_dreq(&c, self->tx_dreq);
+            channel_config_set_read_increment(&c, true);
+            channel_config_set_write_increment(&c, false);
+            dma_channel_configure(chan_tx, &c,
+                tx_destination,
+                data_out,
+                len,
+                false);
+            channel_mask |= 1u << chan_tx;
+        }
+        if (rx) {
+            c = dma_channel_get_default_config(chan_rx);
+            channel_config_set_transfer_data_size(&c, DMA_SIZE_8);
+            channel_config_set_dreq(&c, self->rx_dreq);
+            channel_config_set_read_increment(&c, false);
+            channel_config_set_write_increment(&c, true);
+            dma_channel_configure(chan_rx, &c,
+                data_in,
+                rx_source,
+                len,
+                false);
+            channel_mask |= 1u << chan_rx;
+        }
+
+        dma_start_channel_mask(channel_mask);
+        while ((rx && dma_channel_is_busy(chan_rx)) ||
+               (tx && dma_channel_is_busy(chan_tx))) {
+            // TODO: We should idle here until we get a DMA interrupt or something else.
+            RUN_BACKGROUND_TASKS;
+            if (mp_hal_is_interrupted()) {
+                if (rx && dma_channel_is_busy(chan_rx)) {
+                    dma_channel_abort(chan_rx);
+                }
+                if (tx && dma_channel_is_busy(chan_tx)) {
+                    dma_channel_abort(chan_tx);
+                }
+                break;
+            }
+        }
+        // Clear the stall bit so we can detect when the state machine is done transmitting.
+        self->pio->fdebug = PIO_FDEBUG_TXSTALL_BITS;
+    }
+
+    // If we have claimed only one channel successfully, we should release immediately. This also
+    // releases the DMA after use_dma has been done.
+    if (chan_rx >= 0) {
+        dma_channel_unclaim(chan_rx);
+    }
+    if (chan_tx >= 0) {
+        dma_channel_unclaim(chan_tx);
+    }
+
+    if (!use_dma && !mp_hal_is_interrupted()) {
+        // Use software for small transfers, or if couldn't claim two DMA channels
+        size_t rx_remaining = in_len;
+        size_t tx_remaining = out_len;
+
+        while (rx_remaining || tx_remaining) {
+            if (tx_remaining && !pio_sm_is_tx_fifo_full(self->pio, self->state_machine)) {
+                *tx_destination = *data_out;
+                data_out++;
+                --tx_remaining;
+            }
+            if (rx_remaining && !pio_sm_is_rx_fifo_empty(self->pio, self->state_machine)) {
+                *data_in = (uint8_t) *rx_source;
+                data_in++;
+                --rx_remaining;
+            }
+            RUN_BACKGROUND_TASKS;
+            if (mp_hal_is_interrupted()) {
+                break;
+            }
+        }
+        // Clear the stall bit so we can detect when the state machine is done transmitting.
+        self->pio->fdebug = PIO_FDEBUG_TXSTALL_BITS;
+    }
+    // Wait for the state machine to finish transmitting the data we've queued
+    // up.
+    if (tx) {
+        while (!pio_sm_is_tx_fifo_empty(self->pio, self->state_machine) ||
+               (self->pio->fdebug & PIO_FDEBUG_TXSTALL_BITS) == 0) {
+            RUN_BACKGROUND_TASKS;
+        }
+    }
+    return true;
+}
+
+// Writes out the given data.
+bool common_hal_rp2pio_statemachine_write(rp2pio_statemachine_obj_t *self,
+    const uint8_t *data, size_t len) {
+    if (!self->out) {
+        mp_raise_RuntimeError(translate("No out in program"));
+    }
+    return _transfer(self, data, len, NULL, 0);
+}
diff --git a/ports/raspberrypi/common-hal/rp2pio/StateMachine.h b/ports/raspberrypi/common-hal/rp2pio/StateMachine.h
new file mode 100644
index 000000000..6b70b6b5b
--- /dev/null
+++ b/ports/raspberrypi/common-hal/rp2pio/StateMachine.h
@@ -0,0 +1,68 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_RP2PIO_STATEMACHINE_H
+#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_RP2PIO_STATEMACHINE_H
+
+#include "py/obj.h"
+
+#include "src/rp2_common/hardware_pio/include/hardware/pio.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    uint32_t pins; // Bitmask of what pins this state machine uses.
+    int state_machine;
+    PIO pio;
+    bool in;
+    bool out;
+    uint tx_dreq;
+    uint rx_dreq;
+    bool out_shift_right;
+    bool in_shift_right;
+    uint32_t actual_frequency;
+} rp2pio_statemachine_obj_t;
+
+void reset_rp2pio_statemachine(void);
+
+// Minimal internal version that only fails on pin error (not in use) or full PIO.
+bool rp2pio_statemachine_construct(rp2pio_statemachine_obj_t *self,
+    const uint16_t* program, size_t program_len,
+    size_t frequency,
+    const uint16_t* init, size_t init_len,
+    const mcu_pin_obj_t * first_out_pin, uint8_t out_pin_count,
+    const mcu_pin_obj_t * first_in_pin, uint8_t in_pin_count,
+    const mcu_pin_obj_t * first_set_pin, uint8_t set_pin_count,
+    const mcu_pin_obj_t * first_sideset_pin, uint8_t sideset_pin_count,
+    uint32_t pins_we_use, bool tx_fifo, bool rx_fifo,
+    bool auto_pull, uint8_t pull_threshold, bool out_shift_right,
+    bool auto_push, uint8_t push_threshold, bool in_shift_right,
+    bool claim_pins);
+
+void rp2pio_statemachine_deinit(rp2pio_statemachine_obj_t *self, bool leave_pins);
+
+extern const mp_obj_type_t rp2pio_statemachine_type;
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_RP2PIO_STATEMACHINE_H
diff --git a/ports/raspberrypi/common-hal/rp2pio/__init__.c b/ports/raspberrypi/common-hal/rp2pio/__init__.c
new file mode 100644
index 000000000..21699dfa3
--- /dev/null
+++ b/ports/raspberrypi/common-hal/rp2pio/__init__.c
@@ -0,0 +1 @@
+// Nothing yet.
diff --git a/ports/raspberrypi/common-hal/supervisor/Runtime.c b/ports/raspberrypi/common-hal/supervisor/Runtime.c
new file mode 100755
index 000000000..6be38f216
--- /dev/null
+++ b/ports/raspberrypi/common-hal/supervisor/Runtime.c
@@ -0,0 +1,37 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Michael Schroeder
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdbool.h>
+#include "shared-bindings/supervisor/Runtime.h"
+#include "supervisor/serial.h"
+
+bool common_hal_get_serial_connected(void) {
+    return (bool) serial_connected();
+}
+
+bool common_hal_get_serial_bytes_available(void) {
+    return (bool) serial_bytes_available();
+}
diff --git a/ports/raspberrypi/common-hal/supervisor/Runtime.h b/ports/raspberrypi/common-hal/supervisor/Runtime.h
new file mode 100755
index 000000000..45db489bd
--- /dev/null
+++ b/ports/raspberrypi/common-hal/supervisor/Runtime.h
@@ -0,0 +1,37 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Michael Schroeder
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_SUPERVISOR_RUNTIME_H
+#define MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_SUPERVISOR_RUNTIME_H
+
+#include "py/obj.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    // Stores no state currently.
+} super_runtime_obj_t;
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_COMMON_HAL_SUPERVISOR_RUNTIME_H
diff --git a/ports/raspberrypi/common-hal/supervisor/__init__.c b/ports/raspberrypi/common-hal/supervisor/__init__.c
new file mode 100755
index 000000000..6dca35fb5
--- /dev/null
+++ b/ports/raspberrypi/common-hal/supervisor/__init__.c
@@ -0,0 +1,40 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Michael Schroeder
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+
+#include "py/obj.h"
+
+#include "shared-bindings/supervisor/__init__.h"
+#include "shared-bindings/supervisor/Runtime.h"
+
+
+// The singleton supervisor.Runtime object, bound to supervisor.runtime
+// It currently only has properties, and no state.
+const super_runtime_obj_t common_hal_supervisor_runtime_obj = {
+    .base = {
+        .type = &supervisor_runtime_type,
+    },
+};
diff --git a/ports/raspberrypi/fatfs_port.c b/ports/raspberrypi/fatfs_port.c
new file mode 100644
index 000000000..c65a73a42
--- /dev/null
+++ b/ports/raspberrypi/fatfs_port.c
@@ -0,0 +1,48 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/mphal.h"
+#include "py/runtime.h"
+#include "lib/oofatfs/ff.h"        /* FatFs lower layer API */
+#include "lib/oofatfs/diskio.h"    /* FatFs lower layer API */
+#include "lib/timeutils/timeutils.h"
+
+#if CIRCUITPY_RTC
+#include "shared-bindings/rtc/RTC.h"
+#endif
+
+DWORD get_fattime(void) {
+#if CIRCUITPY_RTC
+    timeutils_struct_time_t tm;
+    common_hal_rtc_get_time(&tm);
+    return ((tm.tm_year - 1980) << 25) | (tm.tm_mon << 21) | (tm.tm_mday << 16) |
+           (tm.tm_hour << 11)          | (tm.tm_min << 5)  | (tm.tm_sec >> 1);
+#else
+    return ((2016 - 1980) << 25) | ((9) << 21) | ((1) << 16) | ((16) << 11) | ((43) << 5) | (35 / 2);
+#endif
+
+
+}
diff --git a/ports/raspberrypi/link.ld b/ports/raspberrypi/link.ld
new file mode 100644
index 000000000..d642fd680
--- /dev/null
+++ b/ports/raspberrypi/link.ld
@@ -0,0 +1,250 @@
+/* Based on GCC ARM embedded samples.
+   Defines the following symbols for use by code:
+    __exidx_start
+    __exidx_end
+    __etext
+    __data_start__
+    __preinit_array_start
+    __preinit_array_end
+    __init_array_start
+    __init_array_end
+    __fini_array_start
+    __fini_array_end
+    __data_end__
+    __bss_start__
+    __bss_end__
+    __end__
+    end
+    __HeapLimit
+    __StackLimit
+    __StackTop
+    __stack (== StackTop)
+*/
+
+MEMORY
+{
+    FLASH_FIRMWARE (rx) : ORIGIN = 0x10000000, LENGTH = 1024k
+    RAM (rwx) : ORIGIN =  0x20000000, LENGTH = 256k
+    SCRATCH_X (rwx) : ORIGIN = 0x20040000, LENGTH = 4k
+    SCRATCH_Y (rwx) : ORIGIN = 0x20041000, LENGTH = 4k
+}
+
+ENTRY(_entry_point)
+
+SECTIONS
+{
+    /* Second stage bootloader is prepended to the image. It must be 256 bytes big
+       and checksummed. It is usually built by the boot_stage2 target
+       in the Pico SDK
+    */
+
+    .flash_begin : {
+        __flash_binary_start = .;
+    } > FLASH_FIRMWARE
+
+    .boot2 : {
+        __boot2_start__ = .;
+        KEEP (*(.boot2))
+        __boot2_end__ = .;
+    } > FLASH_FIRMWARE
+
+    ASSERT(__boot2_end__ - __boot2_start__ == 256,
+        "ERROR: Pico second stage bootloader must be 256 bytes in size")
+
+    /* The second stage will always enter the image at the start of .text.
+       The debugger will use the ELF entry point, which is the _entry_point
+       symbol if present, otherwise defaults to start of .text.
+       This can be used to transfer control back to the bootrom on debugger
+       launches only, to perform proper flash setup.
+    */
+
+    .text : {
+        __reset_start = .;
+        KEEP (*(.reset))
+        . = ALIGN(256);
+        __reset_end = .;
+        ASSERT(__reset_end - __reset_start == 256, "ERROR: reset section should only be 256 bytes");
+        KEEP (*(.vectors))
+        /* TODO revisit this now memset/memcpy/float in ROM */
+        /* bit of a hack right now to exclude all floating point and time critical (e.g. memset, memcpy) code from
+         * FLASH ... we will include any thing excluded here in .data below by default */
+        *(.init)
+        *(EXCLUDE_FILE(*libgcc.a: *libc.a:*lib_a-mem*.o *libm.a:) .text*)
+        *(.fini)
+        /* Pull all c'tors into .text */
+        *crtbegin.o(.ctors)
+        *crtbegin?.o(.ctors)
+        *(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors)
+        *(SORT(.ctors.*))
+        *(.ctors)
+        /* Followed by destructors */
+        *crtbegin.o(.dtors)
+        *crtbegin?.o(.dtors)
+        *(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors)
+        *(SORT(.dtors.*))
+        *(.dtors)
+
+        *(.eh_frame*)
+        . = ALIGN(4);
+    } > FLASH_FIRMWARE
+
+    .rodata : {
+        *(EXCLUDE_FILE(*libgcc.a: *libc.a:*lib_a-mem*.o *libm.a:) .rodata*)
+        . = ALIGN(4);
+        *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.flashdata*)))
+        . = ALIGN(4);
+    } > FLASH_FIRMWARE
+
+    .ARM.extab :
+    {
+        *(.ARM.extab* .gnu.linkonce.armextab.*)
+    } > FLASH_FIRMWARE
+
+    __exidx_start = .;
+    .ARM.exidx :
+    {
+        *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+    } > FLASH_FIRMWARE
+    __exidx_end = .;
+
+    /* Machine inspectable binary information */
+    . = ALIGN(4);
+    __binary_info_start = .;
+    .binary_info :
+    {
+        KEEP(*(.binary_info.keep.*))
+        *(.binary_info.*)
+    } > FLASH_FIRMWARE
+    __binary_info_end = .;
+    . = ALIGN(4);
+
+    /* End of .text-like segments */
+    __etext = .;
+
+   .ram_vector_table (COPY): {
+        *(.ram_vector_table)
+    } > RAM
+
+    .data : {
+        __data_start__ = .;
+        *(vtable)
+
+        *(.time_critical*)
+
+        /* remaining .text and .rodata; i.e. stuff we exclude above because we want it in RAM */
+        *(.text*)
+        . = ALIGN(4);
+        *(.rodata*)
+        . = ALIGN(4);
+
+        *(.data*)
+
+        . = ALIGN(4);
+        *(.after_data.*)
+        . = ALIGN(4);
+        /* preinit data */
+        PROVIDE_HIDDEN (__mutex_array_start = .);
+        KEEP(*(SORT(.mutex_array.*)))
+        KEEP(*(.mutex_array))
+        PROVIDE_HIDDEN (__mutex_array_end = .);
+
+        . = ALIGN(4);
+        /* preinit data */
+        PROVIDE_HIDDEN (__preinit_array_start = .);
+        KEEP(*(SORT(.preinit_array.*)))
+        KEEP(*(.preinit_array))
+        PROVIDE_HIDDEN (__preinit_array_end = .);
+
+        . = ALIGN(4);
+        /* init data */
+        PROVIDE_HIDDEN (__init_array_start = .);
+        KEEP(*(SORT(.init_array.*)))
+        KEEP(*(.init_array))
+        PROVIDE_HIDDEN (__init_array_end = .);
+
+        . = ALIGN(4);
+        /* finit data */
+        PROVIDE_HIDDEN (__fini_array_start = .);
+        *(SORT(.fini_array.*))
+        *(.fini_array)
+        PROVIDE_HIDDEN (__fini_array_end = .);
+
+        *(.jcr)
+        . = ALIGN(4);
+        /* All data end */
+        __data_end__ = .;
+    } > RAM AT> FLASH_FIRMWARE
+
+    .uninitialized_data (COPY): {
+        . = ALIGN(4);
+        *(.uninitialized_data*)
+    } > RAM
+
+    /* Start and end symbols must be word-aligned */
+    .scratch_x : {
+        __scratch_x_start__ = .;
+        *(.scratch_x.*)
+        . = ALIGN(4);
+        __scratch_x_end__ = .;
+    } > SCRATCH_X AT > FLASH_FIRMWARE
+    __scratch_x_source__ = LOADADDR(.scratch_x);
+
+    .scratch_y : {
+        __scratch_y_start__ = .;
+        *(.scratch_y.*)
+        . = ALIGN(4);
+        __scratch_y_end__ = .;
+    } > SCRATCH_Y AT > FLASH_FIRMWARE
+    __scratch_y_source__ = LOADADDR(.scratch_y);
+
+    .bss  : {
+        . = ALIGN(4);
+        __bss_start__ = .;
+        *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.bss*)))
+        *(COMMON)
+        . = ALIGN(4);
+        __bss_end__ = .;
+    } > RAM
+
+    .heap (COPY):
+    {
+        __end__ = .;
+        end = __end__;
+        *(.heap*)
+        __HeapLimit = .;
+    } > RAM
+
+    /* .stack*_dummy section doesn't contains any symbols. It is only
+     * used for linker to calculate size of stack sections, and assign
+     * values to stack symbols later
+     *
+     * stack1 section may be empty/missing if platform_launch_core1 is not used */
+
+    /* by default we put core 0 stack at the end of scratch Y, so that if core 1
+     * stack is not used then all of SCRATCH_X is free.
+     */
+    .stack1_dummy (COPY):
+    {
+        *(.stack1*)
+    } > SCRATCH_X
+    .stack_dummy (COPY):
+    {
+        *(.stack*)
+    } > SCRATCH_Y
+
+    .flash_end : {
+        __flash_binary_end = .;
+    } > FLASH_FIRMWARE
+
+    /* stack limit is poorly named, but historically is maximum heap ptr */
+    __StackLimit = ORIGIN(RAM) + LENGTH(RAM);
+    __StackOneTop = ORIGIN(SCRATCH_X) + LENGTH(SCRATCH_X);
+    __StackTop = ORIGIN(SCRATCH_Y) + LENGTH(SCRATCH_Y);
+    __StackOneBottom = __StackOneTop - SIZEOF(.stack1_dummy);
+    __StackBottom = __StackTop - SIZEOF(.stack_dummy);
+    PROVIDE(__stack = __StackTop);
+
+    /* Check if data + heap + stack exceeds RAM limit */
+    ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed")
+    /* todo assert on extra code */
+}
diff --git a/ports/raspberrypi/mpconfigport.h b/ports/raspberrypi/mpconfigport.h
new file mode 100644
index 000000000..3fdc8febb
--- /dev/null
+++ b/ports/raspberrypi/mpconfigport.h
@@ -0,0 +1,46 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef __INCLUDED_MPCONFIGPORT_H
+#define __INCLUDED_MPCONFIGPORT_H
+
+#define MICROPY_PY_UJSON                            (1)
+
+#define CIRCUITPY_INTERNAL_NVM_SIZE 0
+
+#define CIRCUITPY_DEFAULT_STACK_SIZE                (24*1024)
+
+#define MICROPY_USE_INTERNAL_PRINTF         (1)
+
+#define CIRCUITPY_PROCESSOR_COUNT (2)
+
+// This also includes mpconfigboard.h.
+#include "py/circuitpy_mpconfig.h"
+
+#define MICROPY_PORT_ROOT_POINTERS \
+    CIRCUITPY_COMMON_ROOT_POINTERS;
+
+#endif  // __INCLUDED_MPCONFIGPORT_H
diff --git a/ports/raspberrypi/mpconfigport.mk b/ports/raspberrypi/mpconfigport.mk
new file mode 100644
index 000000000..a6211be73
--- /dev/null
+++ b/ports/raspberrypi/mpconfigport.mk
@@ -0,0 +1,44 @@
+# Define an equivalent for MICROPY_LONGINT_IMPL, to pass to $(MPY-TOOL) in py/mkrules.mk
+# $(MPY-TOOL) needs to know what kind of longint to use (if any) to freeze long integers.
+# This should correspond to the MICROPY_LONGINT_IMPL definition in mpconfigport.h.
+
+ifeq ($(LONGINT_IMPL),NONE)
+MPY_TOOL_LONGINT_IMPL = -mlongint-impl=none
+endif
+
+ifeq ($(LONGINT_IMPL),MPZ)
+MPY_TOOL_LONGINT_IMPL = -mlongint-impl=mpz
+endif
+
+ifeq ($(LONGINT_IMPL),LONGLONG)
+MPY_TOOL_LONGINT_IMPL = -mlongint-impl=longlong
+endif
+
+ifndef CIRCUITPY_RP2PIO
+CIRCUITPY_RP2PIO = 1
+else
+CIRCUITPY_NEOPIXEL_WRITE = 0
+endif
+
+CIRCUITPY_FULL_BUILD = 1
+CIRCUITPY_PWMIO = 1
+
+# Things that need to be implemented.
+CIRCUITPY_AUDIOBUSIO = 0  # Use PIO interally for I2S
+CIRCUITPY_AUDIOMP3 = 0
+CIRCUITPY_COUNTIO = 0  # Use PWM interally
+CIRCUITPY_FREQUENCYIO = 0 # Use PWM interally
+CIRCUITPY_I2CPERIPHERAL = 0
+CIRCUITPY_NVM = 0
+CIRCUITPY_PULSEIO = 0 # Use PIO interally
+CIRCUITPY_ROTARYIO = 0 # Use PIO interally
+CIRCUITPY_RTC = 0
+
+# Things that are unsupported by the hardware.
+CIRCUITPY_AUDIOIO = 0
+
+INTERNAL_LIBM = 1
+
+USB_SERIAL_NUMBER_LENGTH = 32
+
+USB_NUM_EP = 8
diff --git a/ports/raspberrypi/mphalport.c b/ports/raspberrypi/mphalport.c
new file mode 100644
index 000000000..89b597bc7
--- /dev/null
+++ b/ports/raspberrypi/mphalport.c
@@ -0,0 +1,57 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <string.h>
+
+#include "lib/mp-readline/readline.h"
+#include "lib/utils/interrupt_char.h"
+#include "py/mphal.h"
+#include "py/mpstate.h"
+#include "py/runtime.h"
+#include "py/smallint.h"
+#include "shared-bindings/microcontroller/__init__.h"
+#include "shared-bindings/time/__init__.h"
+#include "supervisor/shared/autoreload.h"
+
+#include "mpconfigboard.h"
+#include "mphalport.h"
+#include "supervisor/shared/tick.h"
+
+#include "src/rp2_common/hardware_timer/include/hardware/timer.h"
+
+extern uint32_t common_hal_mcu_processor_get_frequency(void);
+
+void mp_hal_delay_us(mp_uint_t delay) {
+    busy_wait_us_32(delay);
+}
+
+void mp_hal_disable_all_interrupts(void) {
+    common_hal_mcu_disable_interrupts();
+}
+
+void mp_hal_enable_all_interrupts(void) {
+    common_hal_mcu_enable_interrupts();
+}
diff --git a/ports/raspberrypi/mphalport.h b/ports/raspberrypi/mphalport.h
new file mode 100644
index 000000000..8d2d7d51a
--- /dev/null
+++ b/ports/raspberrypi/mphalport.h
@@ -0,0 +1,50 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_MPHALPORT_H
+#define MICROPY_INCLUDED_RASPBERRYPI_MPHALPORT_H
+
+#include "py/obj.h"
+
+#include "lib/oofatfs/ff.h"
+
+#include "supervisor/shared/tick.h"
+
+// Global millisecond tick count (driven by SysTick interrupt).
+#define mp_hal_ticks_ms()       ((mp_uint_t) supervisor_ticks_ms32())
+
+// Number of bytes in receive buffer
+extern volatile uint8_t usb_rx_count;
+extern volatile bool mp_cdc_enabled;
+
+int receive_usb(void);
+
+void mp_hal_set_interrupt_char(int c);
+
+void mp_hal_disable_all_interrupts(void);
+void mp_hal_enable_all_interrupts(void);
+
+#endif // MICROPY_INCLUDED_RASPBERRYPI_MPHALPORT_H
diff --git a/ports/raspberrypi/peripherals/pins.c b/ports/raspberrypi/peripherals/pins.c
new file mode 100644
index 000000000..a2a7b85bd
--- /dev/null
+++ b/ports/raspberrypi/peripherals/pins.c
@@ -0,0 +1,67 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "pins.h"
+
+#include "shared-bindings/microcontroller/Pin.h"
+
+// This macro is used to simplify pin definition in boards/<board>/pins.c
+#define PIN(p_number) \
+const mcu_pin_obj_t pin_GPIO## p_number = { \
+    { &mcu_pin_type }, \
+    .number = p_number \
+}
+
+PIN(0);
+PIN(1);
+PIN(2);
+PIN(3);
+PIN(4);
+PIN(5);
+PIN(6);
+PIN(7);
+PIN(8);
+PIN(9);
+PIN(10);
+PIN(11);
+PIN(12);
+PIN(13);
+PIN(14);
+PIN(15);
+PIN(16);
+PIN(17);
+PIN(18);
+PIN(19);
+PIN(20);
+PIN(21);
+PIN(22);
+PIN(23);
+PIN(24);
+PIN(25);
+PIN(26);
+PIN(27);
+PIN(28);
+PIN(29);
diff --git a/ports/raspberrypi/peripherals/pins.h b/ports/raspberrypi/peripherals/pins.h
new file mode 100644
index 000000000..99ab9cfe4
--- /dev/null
+++ b/ports/raspberrypi/peripherals/pins.h
@@ -0,0 +1,71 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+// DO NOT include this file directly. Use shared-bindings/microcontroller/Pin.h instead to ensure
+// that all necessary includes are already included.
+
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_PERIPHERALS_PINS_H
+#define MICROPY_INCLUDED_RASPBERRYPI_PERIPHERALS_PINS_H
+
+#include "py/obj.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    uint8_t number;
+} mcu_pin_obj_t;
+
+extern const mcu_pin_obj_t pin_GPIO0;
+extern const mcu_pin_obj_t pin_GPIO1;
+extern const mcu_pin_obj_t pin_GPIO2;
+extern const mcu_pin_obj_t pin_GPIO3;
+extern const mcu_pin_obj_t pin_GPIO4;
+extern const mcu_pin_obj_t pin_GPIO5;
+extern const mcu_pin_obj_t pin_GPIO6;
+extern const mcu_pin_obj_t pin_GPIO7;
+extern const mcu_pin_obj_t pin_GPIO8;
+extern const mcu_pin_obj_t pin_GPIO9;
+extern const mcu_pin_obj_t pin_GPIO10;
+extern const mcu_pin_obj_t pin_GPIO11;
+extern const mcu_pin_obj_t pin_GPIO12;
+extern const mcu_pin_obj_t pin_GPIO13;
+extern const mcu_pin_obj_t pin_GPIO14;
+extern const mcu_pin_obj_t pin_GPIO15;
+extern const mcu_pin_obj_t pin_GPIO16;
+extern const mcu_pin_obj_t pin_GPIO17;
+extern const mcu_pin_obj_t pin_GPIO18;
+extern const mcu_pin_obj_t pin_GPIO19;
+extern const mcu_pin_obj_t pin_GPIO20;
+extern const mcu_pin_obj_t pin_GPIO21;
+extern const mcu_pin_obj_t pin_GPIO22;
+extern const mcu_pin_obj_t pin_GPIO23;
+extern const mcu_pin_obj_t pin_GPIO24;
+extern const mcu_pin_obj_t pin_GPIO25;
+extern const mcu_pin_obj_t pin_GPIO26;
+extern const mcu_pin_obj_t pin_GPIO27;
+extern const mcu_pin_obj_t pin_GPIO28;
+extern const mcu_pin_obj_t pin_GPIO29;
+
+#endif  // MICROPY_INCLUDED_RASPBERRYPI_PERIPHERALS_PINS_H
diff --git a/ports/raspberrypi/qstrdefsport.h b/ports/raspberrypi/qstrdefsport.h
new file mode 100644
index 000000000..3ba897069
--- /dev/null
+++ b/ports/raspberrypi/qstrdefsport.h
@@ -0,0 +1 @@
+// qstrs specific to this port
diff --git a/ports/raspberrypi/sdk b/ports/raspberrypi/sdk
new file mode 160000
+Subproject 26653ea81e340cacee55025d110c3e014a252a8
diff --git a/ports/raspberrypi/sdk_config/pico/config_autogen.h b/ports/raspberrypi/sdk_config/pico/config_autogen.h
new file mode 100644
index 000000000..688f367c3
--- /dev/null
+++ b/ports/raspberrypi/sdk_config/pico/config_autogen.h
@@ -0,0 +1,19 @@
+#pragma once
+
+#define PICO_IE_26_29_UNCHANGED_ON_RESET (0)
+#define PICO_USE_STACK_GUARDS (0)
+#define PICO_ENTER_USB_BOOT_ON_EXIT (0)
+#define PICO_USE_OPTIMISTIC_SBRK (0)
+#define PICO_NO_HARDWARE (0)
+#define PICO_ON_DEVICE (1)
+#define PICO_USE_CRT_PRINTF (0)
+#define PICO_NO_PRINTF (0)
+#define PICO_FLOAT_SUPPORT_ROM_V1 (1)
+#define PICO_DOUBLE_SUPPORT_ROM_V1 (1)
+#define PICO_STDIO_UART (0)
+#define PICO_STDIO_USB (0)
+#define PICO_STDIO_SEMIHOSTING (0)
+#define PICO_STDIO_IGNORE_NESTED_STDOUT (0)
+#define PICO_PRINTF_PICO (0)
+#define PICO_PRINTF_NONE (0)
+#define PICO_PRINTF_ALWAYS_INCLUDED (1)
diff --git a/ports/raspberrypi/sdk_config/pico/version.h b/ports/raspberrypi/sdk_config/pico/version.h
new file mode 100644
index 000000000..3a1e1a3d2
--- /dev/null
+++ b/ports/raspberrypi/sdk_config/pico/version.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+// ----------------------------------------------------------
+// THIS FILE IS (NOT) AUTOGENERATED; EDIT when updating sdk/
+// ----------------------------------------------------------
+
+#ifndef _PICO_VERSION_H
+#define _PICO_VERSION_H
+
+#define PICO_SDK_VERSION_MAJOR    1
+#define PICO_SDK_VERSION_MINOR    0
+#define PICO_SDK_VERSION_REVISION 0
+#define PICO_SDK_VERSION_STRING   "1.0.0"
+
+#endif
diff --git a/ports/raspberrypi/supervisor/internal_flash.c b/ports/raspberrypi/supervisor/internal_flash.c
new file mode 100644
index 000000000..d333830de
--- /dev/null
+++ b/ports/raspberrypi/supervisor/internal_flash.c
@@ -0,0 +1,131 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "supervisor/internal_flash.h"
+
+#include <stdint.h>
+#include <string.h>
+#include <stdbool.h>
+
+#include "extmod/vfs.h"
+#include "extmod/vfs_fat.h"
+#include "py/mphal.h"
+#include "py/obj.h"
+#include "py/runtime.h"
+#include "lib/oofatfs/ff.h"
+#include "shared-bindings/microcontroller/__init__.h"
+
+#include "supervisor/usb.h"
+
+#include "src/rp2040/hardware_structs/include/hardware/structs/sio.h"
+#include "src/rp2_common/hardware_flash/include/hardware/flash.h"
+#include "src/common/pico_binary_info/include/pico/binary_info.h"
+
+#define RESERVED_FLASH 1 * 1024 * 1024
+
+// TODO: Parameterize flash size based on the configured flash.
+#define TOTAL_FLASH_SIZE 2 * 1024 * 1024
+
+// TODO: Split the caching out of supervisor/shared/external_flash so we can use it.
+#define SECTOR_SIZE 4096
+#define NO_CACHE 0xffffffff
+STATIC uint8_t _cache[SECTOR_SIZE];
+STATIC uint32_t _cache_lba = NO_CACHE;
+
+void supervisor_flash_init(void) {
+    bi_decl_if_func_used(bi_block_device(
+        BINARY_INFO_MAKE_TAG('C', 'P'),
+        "CircuitPython",
+        RESERVED_FLASH,
+        TOTAL_FLASH_SIZE - RESERVED_FLASH,
+        NULL,
+        BINARY_INFO_BLOCK_DEV_FLAG_READ |
+        BINARY_INFO_BLOCK_DEV_FLAG_WRITE |
+        BINARY_INFO_BLOCK_DEV_FLAG_PT_UNKNOWN));
+}
+
+uint32_t supervisor_flash_get_block_size(void) {
+    return FILESYSTEM_BLOCK_SIZE;
+}
+
+uint32_t supervisor_flash_get_block_count(void) {
+    return (TOTAL_FLASH_SIZE - RESERVED_FLASH) / FILESYSTEM_BLOCK_SIZE;
+}
+
+void port_internal_flash_flush(void) {
+    if (_cache_lba == NO_CACHE) {
+        return;
+    }
+    common_hal_mcu_disable_interrupts();
+    flash_range_erase(RESERVED_FLASH + _cache_lba, SECTOR_SIZE);
+    flash_range_program(RESERVED_FLASH + _cache_lba, _cache, SECTOR_SIZE);
+    common_hal_mcu_enable_interrupts();
+    _cache_lba = NO_CACHE;
+}
+
+mp_uint_t supervisor_flash_read_blocks(uint8_t *dest, uint32_t block, uint32_t num_blocks) {
+    memcpy(dest,
+           (void*)(XIP_BASE + RESERVED_FLASH + block * FILESYSTEM_BLOCK_SIZE),
+           num_blocks * FILESYSTEM_BLOCK_SIZE);
+    return 0;
+}
+
+mp_uint_t supervisor_flash_write_blocks(const uint8_t *src, uint32_t lba, uint32_t num_blocks) {
+    uint32_t blocks_per_sector = SECTOR_SIZE / FILESYSTEM_BLOCK_SIZE;
+    uint32_t block = 0;
+    while (block < num_blocks) {
+        uint32_t block_address = lba + block;
+        uint32_t sector_offset = block_address / blocks_per_sector * SECTOR_SIZE;
+        uint8_t block_offset = block_address % blocks_per_sector;
+
+        if (_cache_lba != block_address) {
+            memcpy(_cache,
+                   (void*)(XIP_BASE + RESERVED_FLASH + sector_offset),
+                   SECTOR_SIZE);
+            _cache_lba = sector_offset;
+        }
+        for (uint8_t b = block_offset; b < blocks_per_sector; b++) {
+            // Stop copying after the last block.
+            if (block >= num_blocks) {
+              break;
+            }
+            memcpy(_cache + b * FILESYSTEM_BLOCK_SIZE,
+                   src + block * FILESYSTEM_BLOCK_SIZE,
+                   FILESYSTEM_BLOCK_SIZE);
+            block++;
+        }
+        // Make sure we don't have an interrupt while we do flash operations.
+        common_hal_mcu_disable_interrupts();
+        flash_range_erase(RESERVED_FLASH + sector_offset, SECTOR_SIZE);
+        flash_range_program(RESERVED_FLASH + sector_offset, _cache, SECTOR_SIZE);
+        common_hal_mcu_enable_interrupts();
+    }
+
+    return 0; // success
+}
+
+void supervisor_flash_release_cache(void) {
+}
diff --git a/ports/raspberrypi/supervisor/internal_flash.h b/ports/raspberrypi/supervisor/internal_flash.h
new file mode 100644
index 000000000..0dc9f1545
--- /dev/null
+++ b/ports/raspberrypi/supervisor/internal_flash.h
@@ -0,0 +1,38 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_INTERNAL_FLASH_H
+#define MICROPY_INCLUDED_RASPBERRYPI_INTERNAL_FLASH_H
+
+#include <stdbool.h>
+
+#include "mpconfigport.h"
+
+// #define INTERNAL_FLASH_PART1_NUM_BLOCKS (CIRCUITPY_INTERNAL_FLASH_FILESYSTEM_SIZE / FILESYSTEM_BLOCK_SIZE)
+
+// #define INTERNAL_FLASH_SYSTICK_MASK    (0x1ff) // 512ms
+// #define INTERNAL_FLASH_IDLE_TICK(tick) (((tick) & INTERNAL_FLASH_SYSTICK_MASK) == 2)
+
+#endif  // MICROPY_INCLUDED_RASPBERRYPI_INTERNAL_FLASH_H
diff --git a/ports/raspberrypi/supervisor/internal_flash_root_pointers.h b/ports/raspberrypi/supervisor/internal_flash_root_pointers.h
new file mode 100644
index 000000000..419a4c943
--- /dev/null
+++ b/ports/raspberrypi/supervisor/internal_flash_root_pointers.h
@@ -0,0 +1,31 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#ifndef MICROPY_INCLUDED_RASPBERRYPI_INTERNAL_FLASH_ROOT_POINTERS_H
+#define MICROPY_INCLUDED_RASPBERRYPI_INTERNAL_FLASH_ROOT_POINTERS_H
+
+#define FLASH_ROOT_POINTERS
+
+#endif  // MICROPY_INCLUDED_RASPBERRYPI_INTERNAL_FLASH_ROOT_POINTERS_H
diff --git a/ports/raspberrypi/supervisor/port.c b/ports/raspberrypi/supervisor/port.c
new file mode 100644
index 000000000..b2f73c7b4
--- /dev/null
+++ b/ports/raspberrypi/supervisor/port.c
@@ -0,0 +1,200 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "supervisor/board.h"
+#include "supervisor/port.h"
+
+#include "bindings/rp2pio/StateMachine.h"
+#include "genhdr/mpversion.h"
+#include "shared-bindings/busio/I2C.h"
+#include "shared-bindings/busio/SPI.h"
+#include "shared-bindings/microcontroller/__init__.h"
+#include "shared-bindings/rtc/__init__.h"
+#include "shared-bindings/pwmio/PWMOut.h"
+
+#include "supervisor/shared/safe_mode.h"
+#include "supervisor/shared/stack.h"
+#include "supervisor/shared/tick.h"
+
+#include "src/rp2040/hardware_structs/include/hardware/structs/watchdog.h"
+#include "src/rp2_common/hardware_gpio/include/hardware/gpio.h"
+#include "src/rp2_common/hardware_uart/include/hardware/uart.h"
+#include "src/rp2_common/hardware_sync/include/hardware/sync.h"
+#include "src/rp2_common/hardware_timer/include/hardware/timer.h"
+#include "src/common/pico_time/include/pico/time.h"
+#include "src/common/pico_binary_info/include/pico/binary_info.h"
+
+#include "tusb.h"
+
+
+extern volatile bool mp_msc_enabled;
+
+STATIC void _tick_callback(uint alarm_num);
+
+STATIC void _binary_info(void) {
+    // Binary info readable with `picotool`.
+    bi_decl(bi_program_name("CircuitPython"));
+    bi_decl(bi_program_version_string(MICROPY_GIT_TAG));
+    bi_decl(bi_program_build_date_string(MICROPY_BUILD_DATE));
+    bi_decl(bi_program_url("https://circuitpython.org"));
+
+    bi_decl(bi_program_build_attribute("BOARD=" CIRCUITPY_BOARD_ID));
+    // TODO: Add build attribute for debug builds. Needs newer CircuitPython with CIRCUITPY_DEBUG.
+}
+
+safe_mode_t port_init(void) {
+    _binary_info();
+    // Set brown out.
+
+    // Reset everything into a known state before board_init.
+    reset_port();
+
+    // For the tick.
+    hardware_alarm_claim(0);
+    hardware_alarm_set_callback(0, _tick_callback);
+
+    // Check brownout.
+
+    if (board_requests_safe_mode()) {
+        return USER_SAFE_MODE;
+    }
+
+    return NO_SAFE_MODE;
+}
+
+void reset_port(void) {
+    #if CIRCUITPY_BUSIO
+    reset_i2c();
+    reset_spi();
+    #endif
+
+    #if CIRCUITPY_RP2PIO
+    reset_rp2pio_statemachine();
+    #endif
+
+    #if CIRCUITPY_PWMIO
+    pwmout_reset();
+    #endif
+
+    reset_all_pins();
+}
+
+void reset_to_bootloader(void) {
+    // reset();
+    while (true) {}
+}
+
+void reset_cpu(void) {
+    // reset();
+    while (true) {}
+}
+
+bool port_has_fixed_stack(void) {
+    return false;
+}
+
+// From the linker script
+extern uint32_t __HeapLimit;
+extern uint32_t __StackTop;
+uint32_t *port_stack_get_limit(void) {
+    return &__HeapLimit;
+}
+
+uint32_t *port_stack_get_top(void) {
+    return &__StackTop;
+}
+
+uint32_t *port_heap_get_bottom(void) {
+    return port_stack_get_limit();
+}
+
+uint32_t *port_heap_get_top(void) {
+    return port_stack_get_top();
+}
+
+void port_set_saved_word(uint32_t value) {
+    // NOTE: This doesn't survive pressing the reset button (aka toggling RUN).
+    watchdog_hw->scratch[0] = value;
+}
+
+uint32_t port_get_saved_word(void) {
+    return watchdog_hw->scratch[0];
+}
+
+uint64_t port_get_raw_ticks(uint8_t* subticks) {
+    uint64_t microseconds = time_us_64();
+    return 1024 * (microseconds / 1000000) + (microseconds % 1000000) / 977;
+}
+
+STATIC void _tick_callback(uint alarm_num) {
+    supervisor_tick();
+    hardware_alarm_set_target(0, delayed_by_us(get_absolute_time(), 977));
+}
+
+// Enable 1/1024 second tick.
+void port_enable_tick(void) {
+    hardware_alarm_set_target(0, delayed_by_us(get_absolute_time(), 977));
+}
+
+// Disable 1/1024 second tick.
+void port_disable_tick(void) {
+    // hardware_alarm_cancel(0);
+}
+
+// This is called by sleep, we ignore it when our ticks are enabled because
+// they'll wake us up earlier. If we don't, we'll mess up ticks by overwriting
+// the next RTC wake up time.
+void port_interrupt_after_ticks(uint32_t ticks) {
+}
+
+void port_idle_until_interrupt(void) {
+    common_hal_mcu_disable_interrupts();
+    if (!tud_task_event_ready()) {
+//	asm volatile ("dsb 0xF":::"memory");
+//        __wfi();
+    }
+    common_hal_mcu_enable_interrupts();
+}
+
+/**
+ * \brief Default interrupt handler for unused IRQs.
+ */
+__attribute__((used)) void HardFault_Handler(void)
+{
+#ifdef ENABLE_MICRO_TRACE_BUFFER
+    // Turn off the micro trace buffer so we don't fill it up in the infinite
+    // loop below.
+    REG_MTB_MASTER = 0x00000000 + 6;
+#endif
+
+    reset_into_safe_mode(HARD_CRASH);
+    while (true) {
+        asm("nop;");
+    }
+}
diff --git a/ports/raspberrypi/supervisor/rp2_cpu.s b/ports/raspberrypi/supervisor/rp2_cpu.s
new file mode 100755
index 000000000..741bb2135
--- /dev/null
+++ b/ports/raspberrypi/supervisor/rp2_cpu.s
@@ -0,0 +1,35 @@
+.syntax unified
+.cpu cortex-m0
+.thumb
+.text
+.align  2
+
+@ uint cpu_get_regs_and_sp(r0=uint regs[10])
+.global cpu_get_regs_and_sp
+.thumb
+.thumb_func
+.type   cpu_get_regs_and_sp, %function
+cpu_get_regs_and_sp:
+@ store registers into given array
+str     r4, [r0, #0]
+str     r5, [r0, #4]
+str     r6, [r0, #8]
+str     r7, [r0, #12]
+push {r1}
+mov     r1, r8
+str     r1, [r0, #16]
+mov     r1, r9
+str     r1, [r0, #20]
+mov     r1, r10
+str     r1, [r0, #24]
+mov     r1, r11
+str     r1, [r0, #28]
+mov     r1, r12
+str     r1, [r0, #32]
+mov     r1, r13
+str     r1, [r0, #36]
+pop {r1}
+
+@ return the sp
+mov     r0, sp
+bx      lr
diff --git a/ports/raspberrypi/supervisor/usb.c b/ports/raspberrypi/supervisor/usb.c
new file mode 100644
index 000000000..1d2425aed
--- /dev/null
+++ b/ports/raspberrypi/supervisor/usb.c
@@ -0,0 +1,53 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2021 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "lib/tinyusb/src/device/usbd.h"
+#include "supervisor/background_callback.h"
+#include "supervisor/usb.h"
+#include "src/rp2_common/hardware_irq/include/hardware/irq.h"
+#include "src/rp2_common/pico_platform/include/pico/platform.h"
+#include "src/rp2040/hardware_regs/include/hardware/regs/intctrl.h"
+
+static background_callback_t usb_callback;
+static void usb_background_do(void* unused) {
+    usb_background();
+}
+
+static void queue_background(void) {
+    background_callback_add(&usb_callback, usb_background_do, NULL);
+}
+
+void init_usb_hardware(void) {
+}
+
+void post_usb_init(void) {
+    irq_handler_t usb_handler = irq_get_exclusive_handler(USBCTRL_IRQ);
+    if (usb_handler) {
+        irq_remove_handler(USBCTRL_IRQ, usb_handler);
+        irq_add_shared_handler(USBCTRL_IRQ, usb_handler, PICO_DEFAULT_IRQ_PRIORITY);
+    }
+    irq_add_shared_handler(USBCTRL_IRQ, queue_background, PICO_LOWEST_IRQ_PRIORITY);
+}