Renamed to adafruit_bus_device

6 files changed, 603 insertions, 0 deletions

diff --git a/shared-bindings/adafruit_bus_device/I2CDevice.c b/shared-bindings/adafruit_bus_device/I2CDevice.c
new file mode 100644
index 000000000..3ec4dae12
--- /dev/null
+++ b/shared-bindings/adafruit_bus_device/I2CDevice.c
@@ -0,0 +1,262 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Mark Komus
+ *
+ * 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
+// busio.I2C class.
+
+#include "shared-bindings/microcontroller/Pin.h"
+#include "shared-bindings/adafruit_bus_device/I2CDevice.h"
+#include "shared-bindings/util.h"
+#include "shared-module/adafruit_bus_device/I2CDevice.h"
+
+#include "lib/utils/buffer_helper.h"
+#include "lib/utils/context_manager_helpers.h"
+#include "py/runtime.h"
+#include "supervisor/shared/translate.h"
+
+
+//| class I2CDevice:
+//|     """I2C Device Manager"""
+//|
+//|     def __init__(self, i2c: busio.I2C, device_address: int, probe: bool = True) -> None:
+//|
+//|         """Represents a single I2C device and manages locking the bus and the device
+//|         address.
+//|         :param ~busio.I2C i2c: The I2C bus the device is on
+//|         :param int device_address: The 7 bit device address
+//|         :param bool probe: Probe for the device upon object creation, default is true
+//|
+//|         Example::
+//|
+//|             import busio
+//|             from board import *
+//|             from adafruit_bus_device.i2c_device import I2CDevice
+//|             with busio.I2C(SCL, SDA) as i2c:
+//|                 device = I2CDevice(i2c, 0x70)
+//|                 bytes_read = bytearray(4)
+//|                 with device:
+//|                     device.readinto(bytes_read)
+//|                 # A second transaction
+//|                 with device:
+//|                     device.write(bytes_read)"""
+//|     ...
+//|
+STATIC mp_obj_t adafruit_bus_device_i2cdevice_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    adafruit_bus_device_i2cdevice_obj_t *self = m_new_obj(adafruit_bus_device_i2cdevice_obj_t);
+    self->base.type = &adafruit_bus_device_i2cdevice_type;
+    enum { ARG_i2c, ARG_device_address, ARG_probe };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_i2c, MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_device_address, MP_ARG_REQUIRED | MP_ARG_INT },
+        { MP_QSTR_probe, 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);
+
+    busio_i2c_obj_t* i2c = args[ARG_i2c].u_obj;
+
+    common_hal_adafruit_bus_device_i2cdevice_construct(MP_OBJ_TO_PTR(self), i2c, args[ARG_device_address].u_int);
+    if (args[ARG_probe].u_bool == true) {
+        common_hal_adafruit_bus_device_i2cdevice_probe_for_device(self);
+    }
+
+    return (mp_obj_t)self;
+}
+
+//|     def __enter__(self) -> I2C:
+//|         """Context manager entry to lock bus."""
+//|         ...
+//|
+STATIC mp_obj_t adafruit_bus_device_i2cdevice_obj___enter__(mp_obj_t self_in) {
+    adafruit_bus_device_i2cdevice_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    common_hal_adafruit_bus_device_i2cdevice_lock(self);
+    return self;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(adafruit_bus_device_i2cdevice___enter___obj, adafruit_bus_device_i2cdevice_obj___enter__);
+
+//|     def __exit__(self) -> None:
+//|         """Automatically unlocks the bus on exit."""
+//|         ...
+//|
+STATIC mp_obj_t adafruit_bus_device_i2cdevice_obj___exit__(size_t n_args, const mp_obj_t *args) {
+    common_hal_adafruit_bus_device_i2cdevice_unlock(MP_OBJ_TO_PTR(args[0]));
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(adafruit_bus_device_i2cdevice___exit___obj, 4, 4, adafruit_bus_device_i2cdevice_obj___exit__);
+
+//| def readinto(self, buf, *, start=0, end=None) -> None:
+//|         """
+//|         Read into ``buf`` from the device. The number of bytes read will be the
+//|         length of ``buf``.
+//|         If ``start`` or ``end`` is provided, then the buffer will be sliced
+//|         as if ``buf[start:end]``. This will not cause an allocation like
+//|         ``buf[start:end]`` will so it saves memory.
+//|         :param bytearray buffer: buffer to write into
+//|         :param int start: Index to start writing at
+//|         :param int end: Index to write up to but not include; if None, use ``len(buf)``"""
+//|         ...
+//|
+STATIC void readinto(adafruit_bus_device_i2cdevice_obj_t *self, mp_obj_t buffer, int32_t start, mp_int_t end) {
+    mp_buffer_info_t bufinfo;
+    mp_get_buffer_raise(buffer, &bufinfo, MP_BUFFER_WRITE);
+
+    size_t length = bufinfo.len;
+    normalize_buffer_bounds(&start, end, &length);
+    if (length == 0) {
+        mp_raise_ValueError(translate("Buffer must be at least length 1"));
+    }
+
+    uint8_t status = common_hal_adafruit_bus_device_i2cdevice_readinto(MP_OBJ_TO_PTR(self), ((uint8_t*)bufinfo.buf) + start, length);
+    if (status != 0) {
+        mp_raise_OSError(status);
+    }
+}
+
+STATIC mp_obj_t adafruit_bus_device_i2cdevice_readinto(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 },
+        { 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} },
+    };
+
+    adafruit_bus_device_i2cdevice_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
+
+    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);
+
+    readinto(self, args[ARG_buffer].u_obj, args[ARG_start].u_int, args[ARG_end].u_int);
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_KW(adafruit_bus_device_i2cdevice_readinto_obj, 2, adafruit_bus_device_i2cdevice_readinto);
+
+//| def write(self, buf, *, start=0, end=None) -> None:
+//|     """
+//|     Write the bytes from ``buffer`` to the device, then transmit a stop bit.
+//|     If ``start`` or ``end`` is provided, then the buffer will be sliced
+//|     as if ``buffer[start:end]``. This will not cause an allocation like
+//|     ``buffer[start:end]`` will so it saves memory.
+//|     :param bytearray buffer: buffer containing the bytes to write
+//|     :param int start: Index to start writing from
+//|     :param int end: Index to read up to but not include; if None, use ``len(buf)``
+//|     """
+//|     ...
+//|
+STATIC void write(adafruit_bus_device_i2cdevice_obj_t *self, mp_obj_t buffer, int32_t start, mp_int_t end) {
+    mp_buffer_info_t bufinfo;
+    mp_get_buffer_raise(buffer, &bufinfo, MP_BUFFER_READ);
+
+    size_t length = bufinfo.len;
+    normalize_buffer_bounds(&start, end, &length);
+    if (length == 0) {
+        mp_raise_ValueError(translate("Buffer must be at least length 1"));
+    }
+
+    uint8_t status = common_hal_adafruit_bus_device_i2cdevice_write(MP_OBJ_TO_PTR(self), ((uint8_t*)bufinfo.buf) + start, length);
+    if (status != 0) {
+        mp_raise_OSError(status);
+    }
+}
+
+STATIC mp_obj_t adafruit_bus_device_i2cdevice_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 },
+        { 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} },
+    };
+    adafruit_bus_device_i2cdevice_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
+
+    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);
+
+    write(self, args[ARG_buffer].u_obj, args[ARG_start].u_int, args[ARG_end].u_int);
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_KW(adafruit_bus_device_i2cdevice_write_obj, 2, adafruit_bus_device_i2cdevice_write);
+
+
+//| def write_then_readinto(self, out_buffer, in_buffer, *, out_start=0, out_end=None, in_start=0, in_end=None) -> None:
+//|         """
+//|         Write the bytes from ``out_buffer`` to the device, then immediately
+//|         reads into ``in_buffer`` from the device. The number of bytes read
+//|         will be the length of ``in_buffer``.
+//|         If ``out_start`` or ``out_end`` is provided, then the output buffer
+//|         will be sliced as if ``out_buffer[out_start:out_end]``. This will
+//|         not cause an allocation like ``buffer[out_start:out_end]`` will so
+//|         it saves memory.
+//|         If ``in_start`` or ``in_end`` is provided, then the input buffer
+//|         will be sliced as if ``in_buffer[in_start:in_end]``. This will not
+//|         cause an allocation like ``in_buffer[in_start:in_end]`` will so
+//|         it saves memory.
+//|         :param bytearray out_buffer: buffer containing the bytes to write
+//|         :param bytearray in_buffer: buffer containing the bytes to read into
+//|         :param int out_start: Index to start writing from
+//|         :param int out_end: Index to read up to but not include; if None, use ``len(out_buffer)``
+//|         :param int in_start: Index to start writing at
+//|         :param int in_end: Index to write up to but not include; if None, use ``len(in_buffer)``
+//|         """
+//|         ...
+//|
+STATIC mp_obj_t adafruit_bus_device_i2cdevice_write_then_readinto(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    enum { ARG_out_buffer, ARG_in_buffer, ARG_out_start, ARG_out_end, ARG_in_start, ARG_in_end };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_out_buffer,    MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_in_buffer,     MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { 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} },
+    };
+    adafruit_bus_device_i2cdevice_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
+
+    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);
+
+    write(self, args[ARG_out_buffer].u_obj, args[ARG_out_start].u_int, args[ARG_out_end].u_int);
+
+    readinto(self, args[ARG_in_buffer].u_obj, args[ARG_in_start].u_int, args[ARG_in_end].u_int);
+
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_KW(adafruit_bus_device_i2cdevice_write_then_readinto_obj, 3, adafruit_bus_device_i2cdevice_write_then_readinto);
+
+STATIC const mp_rom_map_elem_t adafruit_bus_device_i2cdevice_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&adafruit_bus_device_i2cdevice___enter___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&adafruit_bus_device_i2cdevice___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&adafruit_bus_device_i2cdevice_readinto_obj) },
+    { MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&adafruit_bus_device_i2cdevice_write_obj) },
+    { MP_ROM_QSTR(MP_QSTR_write_then_readinto), MP_ROM_PTR(&adafruit_bus_device_i2cdevice_write_then_readinto_obj) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(adafruit_bus_device_i2cdevice_locals_dict, adafruit_bus_device_i2cdevice_locals_dict_table);
+
+const mp_obj_type_t adafruit_bus_device_i2cdevice_type = {
+   { &mp_type_type },
+   .name = MP_QSTR_I2CDevice,
+   .make_new = adafruit_bus_device_i2cdevice_make_new,
+   .locals_dict = (mp_obj_dict_t*)&adafruit_bus_device_i2cdevice_locals_dict,
+};
diff --git a/shared-bindings/adafruit_bus_device/I2CDevice.h b/shared-bindings/adafruit_bus_device/I2CDevice.h
new file mode 100644
index 000000000..7b2182ff0
--- /dev/null
+++ b/shared-bindings/adafruit_bus_device/I2CDevice.h
@@ -0,0 +1,53 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Mark Komus
+ *
+ * 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.
+ */
+
+// Machine is the HAL for low-level, hardware accelerated functions. It is not
+// meant to simplify APIs, its only meant to unify them so that other modules
+// do not require port specific logic.
+//
+// This file includes externs for all functions a port should implement to
+// support the machine module.
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE_I2CDEVICE_H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE_I2CDEVICE_H
+
+#include "py/obj.h"
+
+#include "shared-module/adafruit_bus_device/I2CDevice.h"
+//#include "shared-bindings/busio/I2C.h"
+
+// Type object used in Python. Should be shared between ports.
+extern const mp_obj_type_t adafruit_bus_device_i2cdevice_type;
+
+// Initializes the hardware peripheral.
+extern void common_hal_adafruit_bus_device_i2cdevice_construct(adafruit_bus_device_i2cdevice_obj_t *self, busio_i2c_obj_t *i2c, uint8_t device_address);
+extern uint8_t common_hal_adafruit_bus_device_i2cdevice_readinto(adafruit_bus_device_i2cdevice_obj_t *self, mp_obj_t buffer, size_t length);
+extern uint8_t common_hal_adafruit_bus_device_i2cdevice_write(adafruit_bus_device_i2cdevice_obj_t *self, mp_obj_t buffer, size_t length);
+extern void common_hal_adafruit_bus_device_i2cdevice_lock(adafruit_bus_device_i2cdevice_obj_t *self);
+extern void common_hal_adafruit_bus_device_i2cdevice_unlock(adafruit_bus_device_i2cdevice_obj_t *self);
+extern void common_hal_adafruit_bus_device_i2cdevice_probe_for_device(adafruit_bus_device_i2cdevice_obj_t *self);
+
+#endif // MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE_I2CDEVICE_H
diff --git a/shared-bindings/adafruit_bus_device/SPIDevice.c b/shared-bindings/adafruit_bus_device/SPIDevice.c
new file mode 100644
index 000000000..e127e39b8
--- /dev/null
+++ b/shared-bindings/adafruit_bus_device/SPIDevice.c
@@ -0,0 +1,128 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Mark Komus
+ *
+ * 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/Pin.h"
+#include "shared-bindings/adafruit_bus_device/SPIDevice.h"
+#include "shared-bindings/util.h"
+#include "shared-module/adafruit_bus_device/SPIDevice.h"
+#include "common-hal/digitalio/DigitalInOut.h"
+#include "shared-bindings/digitalio/DigitalInOut.h"
+
+
+#include "lib/utils/buffer_helper.h"
+#include "lib/utils/context_manager_helpers.h"
+#include "py/runtime.h"
+#include "supervisor/shared/translate.h"
+
+
+//| class SPIDevice:
+//|     """SPI Device Manager"""
+//|
+//|     def __init__(self, spi: busio.SPI, chip_select: microcontroller.Pin, *, baudrate: int = 100000, polarity: int = 0, phase: int = 0, extra_clocks : int = 0) -> None:
+//|
+//|         """
+//|         Represents a single SPI device and manages locking the bus and the device address.
+//|         :param ~busio.SPI spi: The SPI bus the device is on
+//|         :param ~digitalio.DigitalInOut chip_select: The chip select pin object that implements the DigitalInOut API.
+//|         :param int extra_clocks: The minimum number of clock cycles to cycle the bus after CS is high. (Used for SD cards.)
+//|
+//|         Example::
+//|
+//|             import busio
+//|             import digitalio
+//|             from board import *
+//|             from adafruit_bus_device.spi_device import SPIDevice
+//|             with busio.SPI(SCK, MOSI, MISO) as spi_bus:
+//|                 cs = digitalio.DigitalInOut(D10)
+//|                 device = SPIDevice(spi_bus, cs)
+//|                 bytes_read = bytearray(4)
+//|                 # The object assigned to spi in the with statements below
+//|                 # is the original spi_bus object. We are using the busio.SPI
+//|                 # operations busio.SPI.readinto() and busio.SPI.write().
+//|                 with device as spi:
+//|                     spi.readinto(bytes_read)
+//|                 # A second transaction
+//|                 with device as spi:
+//|                     spi.write(bytes_read)"""
+//|     ...
+//|
+STATIC mp_obj_t adafruit_bus_device_spidevice_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+    adafruit_bus_device_spidevice_obj_t *self = m_new_obj(adafruit_bus_device_spidevice_obj_t);
+    self->base.type = &adafruit_bus_device_spidevice_type;
+    enum { ARG_spi, ARG_chip_select, ARG_baudrate, ARG_polarity, ARG_phase, ARG_extra_clocks };
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_spi, MP_ARG_REQUIRED | MP_ARG_OBJ },
+        { MP_QSTR_chip_select, MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
+        { MP_QSTR_baudrate, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 100000} },
+        { MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+        { MP_QSTR_extra_clocks, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+    };
+    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);
+
+    busio_spi_obj_t* spi = args[ARG_spi].u_obj;
+
+    common_hal_adafruit_bus_device_spidevice_construct(MP_OBJ_TO_PTR(self), spi, args[ARG_chip_select].u_obj, args[ARG_baudrate].u_int, args[ARG_polarity].u_int,
+        args[ARG_phase].u_int, args[ARG_extra_clocks].u_int);
+
+    if (args[ARG_chip_select].u_obj != MP_OBJ_NULL) {
+        digitalinout_result_t result = common_hal_digitalio_digitalinout_switch_to_output(MP_OBJ_TO_PTR(args[ARG_chip_select].u_obj),
+            true, DRIVE_MODE_PUSH_PULL);
+        if (result == DIGITALINOUT_INPUT_ONLY) {
+            mp_raise_NotImplementedError(translate("Pin is input only"));
+        }
+    }
+
+    return (mp_obj_t)self;
+}
+
+STATIC mp_obj_t adafruit_bus_device_spidevice_obj___enter__(mp_obj_t self_in) {
+    adafruit_bus_device_spidevice_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    common_hal_adafruit_bus_device_spidevice_enter(self);
+    return self->spi;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_1(adafruit_bus_device_spidevice___enter___obj, adafruit_bus_device_spidevice_obj___enter__);
+
+STATIC mp_obj_t adafruit_bus_device_spidevice_obj___exit__(size_t n_args, const mp_obj_t *args) {
+    common_hal_adafruit_bus_device_spidevice_exit(MP_OBJ_TO_PTR(args[0]));
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(adafruit_bus_device_spidevice___exit___obj, 4, 4, adafruit_bus_device_spidevice_obj___exit__);
+
+STATIC const mp_rom_map_elem_t adafruit_bus_device_spidevice_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&adafruit_bus_device_spidevice___enter___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&adafruit_bus_device_spidevice___exit___obj) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(adafruit_bus_device_spidevice_locals_dict, adafruit_bus_device_spidevice_locals_dict_table);
+
+const mp_obj_type_t adafruit_bus_device_spidevice_type = {
+   { &mp_type_type },
+   .name = MP_QSTR_SPIDevice,
+   .make_new = adafruit_bus_device_spidevice_make_new,
+   .locals_dict = (mp_obj_dict_t*)&adafruit_bus_device_spidevice_locals_dict,
+};
diff --git a/shared-bindings/adafruit_bus_device/SPIDevice.h b/shared-bindings/adafruit_bus_device/SPIDevice.h
new file mode 100644
index 000000000..5596b157f
--- /dev/null
+++ b/shared-bindings/adafruit_bus_device/SPIDevice.h
@@ -0,0 +1,50 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Mark Komus
+ *
+ * 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.
+ */
+
+// Machine is the HAL for low-level, hardware accelerated functions. It is not
+// meant to simplify APIs, its only meant to unify them so that other modules
+// do not require port specific logic.
+//
+// This file includes externs for all functions a port should implement to
+// support the machine module.
+
+#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE_SPIDEVICE_H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE_SPIDEVICE_H
+
+#include "py/obj.h"
+
+#include "shared-module/adafruit_bus_device/SPIDevice.h"
+
+// Type object used in Python. Should be shared between ports.
+extern const mp_obj_type_t adafruit_bus_device_spidevice_type;
+
+// Initializes the hardware peripheral.
+extern void common_hal_adafruit_bus_device_spidevice_construct(adafruit_bus_device_spidevice_obj_t *self, busio_spi_obj_t *spi,  digitalio_digitalinout_obj_t *cs,
+    uint32_t baudrate, uint8_t polarity, uint8_t phase, uint8_t extra_clocks);
+extern void common_hal_adafruit_bus_device_spidevice_enter(adafruit_bus_device_spidevice_obj_t *self);
+extern void common_hal_adafruit_bus_device_spidevice_exit(adafruit_bus_device_spidevice_obj_t *self);
+
+#endif // MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE_SPIDEVICE_H
diff --git a/shared-bindings/adafruit_bus_device/__init__.c b/shared-bindings/adafruit_bus_device/__init__.c
new file mode 100644
index 000000000..e01abcab3
--- /dev/null
+++ b/shared-bindings/adafruit_bus_device/__init__.c
@@ -0,0 +1,78 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Mark Komus
+ *
+ * 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/obj.h"
+#include "py/runtime.h"
+#include "py/mphal.h"
+#include "py/objproperty.h"
+
+#include "shared-bindings/adafruit_bus_device/__init__.h"
+#include "shared-bindings/adafruit_bus_device/I2CDevice.h"
+#include "shared-bindings/adafruit_bus_device/SPIDevice.h"
+
+STATIC const mp_rom_map_elem_t adafruit_bus_device_i2c_device_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_i2c_device) },
+    { MP_ROM_QSTR(MP_QSTR_I2CDevice),   MP_ROM_PTR(&adafruit_bus_device_i2cdevice_type) },
+};
+STATIC MP_DEFINE_CONST_DICT(adafruit_bus_device_i2c_device_globals, adafruit_bus_device_i2c_device_globals_table);
+
+const mp_obj_module_t adafruit_bus_device_i2c_device_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&adafruit_bus_device_i2c_device_globals,
+};
+
+STATIC const mp_rom_map_elem_t adafruit_bus_device_spi_device_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_spi_device) },
+    { MP_ROM_QSTR(MP_QSTR_SPIDevice),   MP_ROM_PTR(&adafruit_bus_device_spidevice_type) },
+};
+STATIC MP_DEFINE_CONST_DICT(adafruit_bus_device_spi_device_globals, adafruit_bus_device_spi_device_globals_table);
+
+const mp_obj_module_t adafruit_bus_device_spi_device_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&adafruit_bus_device_spi_device_globals,
+};
+
+//| """Hardware accelerated external bus access
+//|
+//| The I2CDevice and SPIDevice helper classes make managing transaction state on a bus easy.
+//| For example, they manage locking the bus to prevent other concurrent access. For SPI
+//| devices, it manages the chip select and protocol changes such as mode. For I2C, it
+//| manages the device address."""
+//|
+STATIC const mp_rom_map_elem_t adafruit_bus_device_module_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_adafruit_bus_device) },
+    { MP_ROM_QSTR(MP_QSTR_i2c_device),   MP_ROM_PTR(&adafruit_bus_device_i2c_device_module) },
+    { MP_ROM_QSTR(MP_QSTR_spi_device),   MP_ROM_PTR(&adafruit_bus_device_spi_device_module) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(adafruit_bus_device_module_globals, adafruit_bus_device_module_globals_table);
+
+const mp_obj_module_t adafruit_bus_device_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&adafruit_bus_device_module_globals,
+};
diff --git a/shared-bindings/adafruit_bus_device/__init__.h b/shared-bindings/adafruit_bus_device/__init__.h
new file mode 100644
index 000000000..4a669807b
--- /dev/null
+++ b/shared-bindings/adafruit_bus_device/__init__.h
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 Mark Komus
+ *
+ * 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_SHARED_BINDINGS_BUSDEVICE___INIT___H
+#define MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE___INIT___H
+
+// Nothing now.
+
+#endif  // MICROPY_INCLUDED_SHARED_BINDINGS_BUSDEVICE___INIT___H