Merge remote-tracking branch 'origin/main' into stm32-sdioio

22 files changed, 233 insertions, 17 deletions

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index dd121b87e..feb6a7f63 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -172,6 +172,7 @@ jobs:
         - "bast_pro_mini_m0"
         - "bdmicro_vina_m0"
         - "bless_dev_board_multi_sensor"
+        - "blm_badge"
         - "capablerobot_usbhub"
         - "catwan_usbstick"
         - "circuitbrains_basic_m0"
@@ -420,7 +421,7 @@ jobs:
       id: idf-cache
       with:
         path: ${{ github.workspace }}/.idf_tools
-        key: ${{ runner.os }}-idf-tools-${{ hashFiles('.git/modules/ports/esp32s2/esp-idf/HEAD') }}-20200523
+        key: ${{ runner.os }}-idf-tools-${{ hashFiles('.git/modules/ports/esp32s2/esp-idf/HEAD') }}-20200801
     - name: Install IDF tools
       run: |
         $IDF_PATH/tools/idf_tools.py --non-interactive install required
diff --git a/frozen/Adafruit_CircuitPython_BusDevice b/frozen/Adafruit_CircuitPython_BusDevice
-Subproject eb4b21e216efd8ec0c4862a938e81b56be96172
+Subproject e9411c4244984b69ec6928370ede40cec014c10
diff --git a/locale/circuitpython.pot b/locale/circuitpython.pot
index 7a036900a..d38434c2c 100644
--- a/locale/circuitpython.pot
+++ b/locale/circuitpython.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2020-07-30 07:18-0500\n"
+"POT-Creation-Date: 2020-08-03 21:01-0500\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -865,6 +865,10 @@ msgstr ""
 msgid "I2C Init Error"
 msgstr ""
 
+#: shared-bindings/audiobusio/I2SOut.c
+msgid "I2SOut not available"
+msgstr ""
+
 #: shared-bindings/aesio/aes.c
 #, c-format
 msgid "IV must be %d bytes long"
diff --git a/ports/atmel-samd/boards/blm_badge/board.c b/ports/atmel-samd/boards/blm_badge/board.c
new file mode 100644
index 000000000..ee353c810
--- /dev/null
+++ b/ports/atmel-samd/boards/blm_badge/board.c
@@ -0,0 +1,39 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 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 "boards/board.h"
+#include "supervisor/shared/board.h"
+
+void board_init(void) {
+}
+
+bool board_requests_safe_mode(void) {
+    return false;
+}
+
+void reset_board(void) {
+    board_reset_user_neopixels();
+}
diff --git a/ports/atmel-samd/boards/blm_badge/mpconfigboard.h b/ports/atmel-samd/boards/blm_badge/mpconfigboard.h
new file mode 100644
index 000000000..4f56d23b0
--- /dev/null
+++ b/ports/atmel-samd/boards/blm_badge/mpconfigboard.h
@@ -0,0 +1,37 @@
+#define MICROPY_HW_BOARD_NAME "Adafruit BLM Badge"
+#define MICROPY_HW_MCU_NAME "samd21e18"
+
+#define MICROPY_HW_LED_STATUS   (&pin_PA03)
+
+#define MICROPY_PORT_A        (PORT_PA24 | PORT_PA25)
+#define MICROPY_PORT_B        (0)
+#define MICROPY_PORT_C        (0)
+
+#define DEFAULT_I2C_BUS_SCL (&pin_PA01)
+#define DEFAULT_I2C_BUS_SDA (&pin_PA00)
+
+#define DEFAULT_UART_BUS_RX (&pin_PA01)
+#define DEFAULT_UART_BUS_TX (&pin_PA00)
+
+#define USER_NEOPIXELS_PIN  (&pin_PA05)
+
+#define IGNORE_PIN_PA09     1
+#define IGNORE_PIN_PA12     1
+#define IGNORE_PIN_PA13     1
+#define IGNORE_PIN_PA14     1
+#define IGNORE_PIN_PA15     1
+#define IGNORE_PIN_PA16     1
+#define IGNORE_PIN_PA17     1
+#define IGNORE_PIN_PA18     1
+#define IGNORE_PIN_PA19     1
+#define IGNORE_PIN_PA20     1
+#define IGNORE_PIN_PA21     1
+#define IGNORE_PIN_PA22     1
+#define IGNORE_PIN_PA23     1
+// USB is always used.
+#define IGNORE_PIN_PA24     1
+#define IGNORE_PIN_PA25     1
+#define IGNORE_PIN_PA27     1
+#define IGNORE_PIN_PA28     1
+#define IGNORE_PIN_PA30     1
+#define IGNORE_PIN_PA31     1
diff --git a/ports/atmel-samd/boards/blm_badge/mpconfigboard.mk b/ports/atmel-samd/boards/blm_badge/mpconfigboard.mk
new file mode 100644
index 000000000..794e38d79
--- /dev/null
+++ b/ports/atmel-samd/boards/blm_badge/mpconfigboard.mk
@@ -0,0 +1,24 @@
+USB_VID = 0x239A
+USB_PID = 0x80C0
+USB_PRODUCT = "BLM Badge"
+USB_MANUFACTURER = "Adafruit Industries LLC"
+
+CHIP_VARIANT = SAMD21E18A
+CHIP_FAMILY = samd21
+
+INTERNAL_FLASH_FILESYSTEM = 1
+LONGINT_IMPL = NONE
+CIRCUITPY_FULL_BUILD = 0
+
+CIRCUITPY_AUDIOIO = 1
+CIRCUITPY_AUDIOBUSIO = 1
+# Pins for I2SOut are not available.
+CIRCUITPY_AUDIOBUSIO_I2SOUT = 0
+CIRCUITPY_PULSEIO = 0
+CIRCUITPY_ROTARYIO = 0
+CIRCUITPY_RTC = 0
+CIRCUITPY_SAMD = 0
+CIRCUITPY_USB_HID = 1
+CIRCUITPY_USB_MIDI = 0
+
+SUPEROPT_GC = 0
diff --git a/ports/atmel-samd/boards/blm_badge/pins.c b/ports/atmel-samd/boards/blm_badge/pins.c
new file mode 100644
index 000000000..af1b69358
--- /dev/null
+++ b/ports/atmel-samd/boards/blm_badge/pins.c
@@ -0,0 +1,43 @@
+#include "shared-bindings/board/__init__.h"
+
+STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_RX),  MP_ROM_PTR(&pin_PA01) },
+    { MP_ROM_QSTR(MP_QSTR_SCL), MP_ROM_PTR(&pin_PA01) }, // pad 1
+    { MP_ROM_QSTR(MP_QSTR_D6),  MP_ROM_PTR(&pin_PA01) },
+
+    { MP_ROM_QSTR(MP_QSTR_TX),  MP_ROM_PTR(&pin_PA00) },
+    { MP_ROM_QSTR(MP_QSTR_SDA), MP_ROM_PTR(&pin_PA00) }, // pad 0
+    { MP_ROM_QSTR(MP_QSTR_D5),  MP_ROM_PTR(&pin_PA00) },
+
+    { MP_ROM_QSTR(MP_QSTR_CAP1), MP_ROM_PTR(&pin_PA02) },
+    { MP_ROM_QSTR(MP_QSTR_D1), MP_ROM_PTR(&pin_PA02) },
+    { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
+
+    { MP_ROM_QSTR(MP_QSTR_CAP2), MP_ROM_PTR(&pin_PA04) },
+    { MP_ROM_QSTR(MP_QSTR_D2), MP_ROM_PTR(&pin_PA04) },
+    { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PA04) },
+
+    { MP_ROM_QSTR(MP_QSTR_CAP3), MP_ROM_PTR(&pin_PA06) },
+    { MP_ROM_QSTR(MP_QSTR_D3), MP_ROM_PTR(&pin_PA06) },
+    { MP_ROM_QSTR(MP_QSTR_A2), MP_ROM_PTR(&pin_PA06) },
+
+    { MP_ROM_QSTR(MP_QSTR_CAP4), MP_ROM_PTR(&pin_PA07) },
+    { MP_ROM_QSTR(MP_QSTR_D4), MP_ROM_PTR(&pin_PA07) },
+    { MP_ROM_QSTR(MP_QSTR_A3), MP_ROM_PTR(&pin_PA07) },
+
+    { MP_ROM_QSTR(MP_QSTR_NEOPIXEL),  MP_ROM_PTR(&pin_PA05) },
+    { MP_ROM_QSTR(MP_QSTR_D14),  MP_ROM_PTR(&pin_PA05) },
+
+    { MP_ROM_QSTR(MP_QSTR_MICROPHONE_CLOCK), MP_ROM_PTR(&pin_PA10) },
+    { MP_ROM_QSTR(MP_QSTR_D7), MP_ROM_PTR(&pin_PA10) },
+
+    { MP_ROM_QSTR(MP_QSTR_MICROPHONE_DATA), MP_ROM_PTR(&pin_PA08) },
+    { MP_ROM_QSTR(MP_QSTR_D0), MP_ROM_PTR(&pin_PA08) },
+
+    { MP_ROM_QSTR(MP_QSTR_LIGHT), MP_ROM_PTR(&pin_PA11) },
+    { MP_ROM_QSTR(MP_QSTR_A4), MP_ROM_PTR(&pin_PA11) },
+
+    { MP_ROM_QSTR(MP_QSTR_L),   MP_ROM_PTR(&pin_PA03) },
+    { MP_ROM_QSTR(MP_QSTR_D13), MP_ROM_PTR(&pin_PA03) },
+};
+MP_DEFINE_CONST_DICT(board_module_globals, board_global_dict_table);
diff --git a/ports/atmel-samd/boards/fluff_m0/mpconfigboard.mk b/ports/atmel-samd/boards/fluff_m0/mpconfigboard.mk
index 8efc1b575..c040eb430 100644
--- a/ports/atmel-samd/boards/fluff_m0/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/fluff_m0/mpconfigboard.mk
@@ -14,5 +14,6 @@ SUPEROPT_GC = 0
 
 CFLAGS_BOARD = --param max-inline-insns-auto=15
 ifeq ($(TRANSLATION), zh_Latn_pinyin)
+RELEASE_NEEDS_CLEAN_BUILD = 1
 CFLAGS_INLINE_LIMIT = 35
 endif
diff --git a/ports/atmel-samd/boards/gemma_m0/mpconfigboard.mk b/ports/atmel-samd/boards/gemma_m0/mpconfigboard.mk
index ca3eccbe4..0345417a9 100644
--- a/ports/atmel-samd/boards/gemma_m0/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/gemma_m0/mpconfigboard.mk
@@ -11,3 +11,13 @@ LONGINT_IMPL = NONE
 CIRCUITPY_FULL_BUILD = 0
 
 SUPEROPT_GC = 0
+
+CFLAGS_BOARD = --param max-inline-insns-auto=15
+ifeq ($(TRANSLATION), zh_Latn_pinyin)
+RELEASE_NEEDS_CLEAN_BUILD = 1
+CFLAGS_INLINE_LIMIT = 35
+endif
+ifeq ($(TRANSLATION), de_DE)
+RELEASE_NEEDS_CLEAN_BUILD = 1
+CFLAGS_INLINE_LIMIT = 35
+endif
diff --git a/ports/atmel-samd/boards/openbook_m4/board.c b/ports/atmel-samd/boards/openbook_m4/board.c
index 9c71ee564..f0010f6d7 100644
--- a/ports/atmel-samd/boards/openbook_m4/board.c
+++ b/ports/atmel-samd/boards/openbook_m4/board.c
@@ -76,13 +76,13 @@ void board_init(void) {
         sizeof(start_sequence),
         stop_sequence,
         sizeof(stop_sequence),
-        400, // width
-        300, // height
-        400, // RAM width
-        300, // RAM height
+        300, // width
+        400, // height
+        300, // RAM width
+        400, // RAM height
         0, // colstart
         0, // rowstart
-        0, // rotation
+        270, // rotation
         NO_COMMAND, // set_column_window_command
         NO_COMMAND, // set_row_window_command
         NO_COMMAND, // set_current_column_command
diff --git a/ports/atmel-samd/boards/openbook_m4/pins.c b/ports/atmel-samd/boards/openbook_m4/pins.c
index 3fbb67860..47de3043d 100644
--- a/ports/atmel-samd/boards/openbook_m4/pins.c
+++ b/ports/atmel-samd/boards/openbook_m4/pins.c
@@ -53,6 +53,10 @@ STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_OBJ_NEW_QSTR(MP_QSTR_EBSY),  MP_ROM_PTR(&pin_PA01) },
 
     // Special named pins
+    { MP_OBJ_NEW_QSTR(MP_QSTR_BATTERY),  MP_ROM_PTR(&pin_PB01) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_USB),  MP_ROM_PTR(&pin_PB00) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_MICIN),  MP_ROM_PTR(&pin_PB04) },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_MICOUT),  MP_ROM_PTR(&pin_PA07) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_NEOPIXEL),  MP_ROM_PTR(&pin_PA15) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_LOCK_BUTTON),  MP_ROM_PTR(&pin_PA27) },
     { MP_OBJ_NEW_QSTR(MP_QSTR_BUTTON_LATCH),  MP_ROM_PTR(&pin_PB12) },
diff --git a/ports/atmel-samd/boards/pewpew_m4/mpconfigboard.mk b/ports/atmel-samd/boards/pewpew_m4/mpconfigboard.mk
index 1ea4a7601..161477968 100644
--- a/ports/atmel-samd/boards/pewpew_m4/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/pewpew_m4/mpconfigboard.mk
@@ -42,6 +42,7 @@ CIRCUITPY_DISPLAY_FONT = $(TOP)/ports/atmel-samd/boards/ugame10/brutalist-6.bdf
 
 # Tweak inlining depending on language.
 ifeq ($(TRANSLATION), zh_Latn_pinyin)
+RELEASE_NEEDS_CLEAN_BUILD = 1
 CFLAGS_INLINE_LIMIT = 45
 else
 CFLAGS_INLINE_LIMIT = 70
diff --git a/ports/atmel-samd/boards/pyruler/mpconfigboard.mk b/ports/atmel-samd/boards/pyruler/mpconfigboard.mk
index 885f58e4e..4484b4ed9 100644
--- a/ports/atmel-samd/boards/pyruler/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/pyruler/mpconfigboard.mk
@@ -15,5 +15,6 @@ SUPEROPT_GC = 0
 
 CFLAGS_BOARD = --param max-inline-insns-auto=15
 ifeq ($(TRANSLATION), zh_Latn_pinyin)
+RELEASE_NEEDS_CLEAN_BUILD = 1
 CFLAGS_INLINE_LIMIT = 35
 endif
diff --git a/ports/atmel-samd/boards/trinket_m0/mpconfigboard.mk b/ports/atmel-samd/boards/trinket_m0/mpconfigboard.mk
index aab5efd5d..735d42297 100644
--- a/ports/atmel-samd/boards/trinket_m0/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/trinket_m0/mpconfigboard.mk
@@ -14,5 +14,11 @@ SUPEROPT_GC = 0
 
 CFLAGS_BOARD = --param max-inline-insns-auto=15
 ifeq ($(TRANSLATION), zh_Latn_pinyin)
+RELEASE_NEEDS_CLEAN_BUILD = 1
 CFLAGS_INLINE_LIMIT = 35
 endif
+ifeq ($(TRANSLATION), de_DE)
+RELEASE_NEEDS_CLEAN_BUILD = 1
+CFLAGS_INLINE_LIMIT = 35
+SUPEROPT_VM = 0
+endif
diff --git a/ports/atmel-samd/boards/ugame10/mpconfigboard.mk b/ports/atmel-samd/boards/ugame10/mpconfigboard.mk
index d641a89eb..bd320d9e4 100644
--- a/ports/atmel-samd/boards/ugame10/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/ugame10/mpconfigboard.mk
@@ -35,6 +35,7 @@ CIRCUITPY_DISPLAY_FONT = $(TOP)/ports/atmel-samd/boards/ugame10/brutalist-6.bdf
 
 # Tweak inlining depending on language.
 ifeq ($(TRANSLATION), zh_Latn_pinyin)
+RELEASE_NEEDS_CLEAN_BUILD = 1
 CFLAGS_INLINE_LIMIT = 45
 else
 CFLAGS_INLINE_LIMIT = 70
diff --git a/ports/atmel-samd/common-hal/audiobusio/I2SOut.c b/ports/atmel-samd/common-hal/audiobusio/I2SOut.c
index 20fa624ed..0aa48c804 100644
--- a/ports/atmel-samd/common-hal/audiobusio/I2SOut.c
+++ b/ports/atmel-samd/common-hal/audiobusio/I2SOut.c
@@ -27,6 +27,11 @@
 #include <stdint.h>
 #include <string.h>
 
+#include "mpconfigport.h"
+
+// Some boards don't implement I2SOut, so suppress any routines from here.
+#if CIRCUITPY_AUDIOBUSIO_I2SOUT
+
 #include "extmod/vfs_fat.h"
 #include "py/gc.h"
 #include "py/mperrno.h"
@@ -382,3 +387,5 @@ bool common_hal_audiobusio_i2sout_get_playing(audiobusio_i2sout_obj_t* self) {
     }
     return still_playing;
 }
+
+#endif // CIRCUITPY_AUDIOBUSIO_I2SOUT
diff --git a/ports/atmel-samd/common-hal/audiobusio/I2SOut.h b/ports/atmel-samd/common-hal/audiobusio/I2SOut.h
index ce88f4de6..a66dae9bb 100644
--- a/ports/atmel-samd/common-hal/audiobusio/I2SOut.h
+++ b/ports/atmel-samd/common-hal/audiobusio/I2SOut.h
@@ -32,6 +32,9 @@
 #include "audio_dma.h"
 #include "py/obj.h"
 
+// Some boards don't implement I2SOut, so suppress any routines from here.
+#if CIRCUITPY_AUDIOBUSIO_I2SOUT
+
 // We don't bit pack because we'll only have two at most. Its better to save code size instead.
 typedef struct {
     mp_obj_base_t base;
@@ -48,4 +51,6 @@ typedef struct {
 
 void i2sout_reset(void);
 
+#endif // CIRCUITPY_AUDIOBUSIO_I2SOUT
+
 #endif // MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_AUDIOBUSIO_I2SOUT_H
diff --git a/ports/atmel-samd/common-hal/audiobusio/PDMIn.c b/ports/atmel-samd/common-hal/audiobusio/PDMIn.c
index 474512f5e..21474ab3b 100644
--- a/ports/atmel-samd/common-hal/audiobusio/PDMIn.c
+++ b/ports/atmel-samd/common-hal/audiobusio/PDMIn.c
@@ -84,12 +84,12 @@ void common_hal_audiobusio_pdmin_construct(audiobusio_pdmin_obj_t* self,
     self->clock_pin = clock_pin; // PA10, PA20 -> SCK0, PB11 -> SCK1
     #ifdef SAMD21
         if (clock_pin == &pin_PA10
-        #ifdef PIN_PA20
+        #if defined(PIN_PA20) && !defined(IGNORE_PIN_PA20)
             || clock_pin == &pin_PA20
         #endif
             ) {
             self->clock_unit = 0;
-        #ifdef PIN_PB11
+        #if defined(PIN_PB11) && !defined(IGNORE_PIN_PB11)
         } else if (clock_pin == &pin_PB11) {
             self->clock_unit = 1;
         #endif
@@ -98,7 +98,7 @@ void common_hal_audiobusio_pdmin_construct(audiobusio_pdmin_obj_t* self,
         if (clock_pin == &pin_PA10 || clock_pin == &pin_PB16) {
             self->clock_unit = 0;
     } else if (clock_pin == &pin_PB12
-        #ifdef PIN_PB28
+        #if defined(PIN_PB28) && !defined(IGNORE_PIN_PB28)
         || data_pin == &pin_PB28) {
         #else
         ) {
@@ -112,14 +112,24 @@ void common_hal_audiobusio_pdmin_construct(audiobusio_pdmin_obj_t* self,
     self->data_pin = data_pin; // PA07, PA19 -> SD0, PA08, PB16 -> SD1
 
     #ifdef SAMD21
-    if (data_pin == &pin_PA07 || data_pin == &pin_PA19) {
-        self->serializer = 0;
-    } else if (data_pin == &pin_PA08
-        #ifdef PIN_PB16
-        || data_pin == &pin_PB16) {
-        #else
+    if (false
+        #if defined(PIN_PA07) && !defined(IGNORE_PIN_PA07)
+        || data_pin == &pin_PA07
+        #endif
+        #if defined(PIN_PA19) && !defined(IGNORE_PIN_PA19)
+        || data_pin == &pin_PA19
+        #endif
         ) {
+        self->serializer = 0;
+    }
+    else if (false
+        #if defined(PIN_PA08) && !defined(IGNORE_PIN_PA08)
+        || data_pin == &pin_PA08
         #endif
+        #if defined (PIN_PB16) && !defined(IGNORE_PIN_PB16)
+        || data_pin == &pin_PB16
+       #endif
+        ) {
         self->serializer = 1;
     #endif
     #ifdef SAM_D5X_E5X
diff --git a/ports/atmel-samd/supervisor/port.c b/ports/atmel-samd/supervisor/port.c
index 65501861e..591a85853 100644
--- a/ports/atmel-samd/supervisor/port.c
+++ b/ports/atmel-samd/supervisor/port.c
@@ -322,9 +322,11 @@ void reset_port(void) {
     audioout_reset();
 #endif
 #if CIRCUITPY_AUDIOBUSIO
-    i2sout_reset();
     //pdmin_reset();
 #endif
+#if CIRCUITPY_AUDIOBUSIO_I2SOUT
+    i2sout_reset();
+#endif
 
 #if CIRCUITPY_TOUCHIO && CIRCUITPY_TOUCHIO_USE_NATIVE
     touchin_reset();
diff --git a/py/circuitpy_mpconfig.mk b/py/circuitpy_mpconfig.mk
index baa29e26b..2cf8426e5 100644
--- a/py/circuitpy_mpconfig.mk
+++ b/py/circuitpy_mpconfig.mk
@@ -42,6 +42,10 @@ CFLAGS += -DCIRCUITPY_ANALOGIO=$(CIRCUITPY_ANALOGIO)
 CIRCUITPY_AUDIOBUSIO ?= $(CIRCUITPY_FULL_BUILD)
 CFLAGS += -DCIRCUITPY_AUDIOBUSIO=$(CIRCUITPY_AUDIOBUSIO)
 
+# Some boards have PDMIn but do not implement I2SOut.
+CIRCUITPY_AUDIOBUSIO_I2SOUT ?= $(CIRCUITPY_AUDIOBUSIO)
+CFLAGS += -DCIRCUITPY_AUDIOBUSIO_I2SOUT=$(CIRCUITPY_AUDIOBUSIO_I2SOUT)
+
 CIRCUITPY_AUDIOIO ?= $(CIRCUITPY_FULL_BUILD)
 CFLAGS += -DCIRCUITPY_AUDIOIO=$(CIRCUITPY_AUDIOIO)
 
diff --git a/shared-bindings/audiobusio/I2SOut.c b/shared-bindings/audiobusio/I2SOut.c
index 73a78ab06..797d782d5 100644
--- a/shared-bindings/audiobusio/I2SOut.c
+++ b/shared-bindings/audiobusio/I2SOut.c
@@ -91,6 +91,10 @@
 //|         ...
 //|
 STATIC mp_obj_t audiobusio_i2sout_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
+#if !CIRCUITPY_AUDIOBUSIO_I2SOUT
+    mp_raise_NotImplementedError(translate("I2SOut not available"));
+    return NULL;                // Not reachable.
+#else
     enum { ARG_bit_clock, ARG_word_select, ARG_data, ARG_left_justified };
     static const mp_arg_t allowed_args[] = {
         { MP_QSTR_bit_clock, MP_ARG_OBJ | MP_ARG_REQUIRED },
@@ -110,8 +114,11 @@ STATIC mp_obj_t audiobusio_i2sout_make_new(const mp_obj_type_t *type, size_t n_a
     common_hal_audiobusio_i2sout_construct(self, bit_clock, word_select, data, args[ARG_left_justified].u_bool);
 
     return MP_OBJ_FROM_PTR(self);
+#endif
 }
 
+#if CIRCUITPY_AUDIOBUSIO_I2SOUT
+
 //|     def deinit(self) -> None:
 //|         """Deinitialises the I2SOut and releases any hardware resources for reuse."""
 //|         ...
@@ -120,6 +127,7 @@ STATIC mp_obj_t audiobusio_i2sout_deinit(mp_obj_t self_in) {
     audiobusio_i2sout_obj_t *self = MP_OBJ_TO_PTR(self_in);
     common_hal_audiobusio_i2sout_deinit(self);
     return mp_const_none;
+
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(audiobusio_i2sout_deinit_obj, audiobusio_i2sout_deinit);
 
@@ -251,9 +259,11 @@ const mp_obj_property_t audiobusio_i2sout_paused_obj = {
               (mp_obj_t)&mp_const_none_obj,
               (mp_obj_t)&mp_const_none_obj},
 };
+#endif // CIRCUITPY_AUDIOBUSIO_I2SOUT
 
 STATIC const mp_rom_map_elem_t audiobusio_i2sout_locals_dict_table[] = {
     // Methods
+#if CIRCUITPY_AUDIOBUSIO_I2SOUT
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&audiobusio_i2sout_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audiobusio_i2sout_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
@@ -266,6 +276,7 @@ STATIC const mp_rom_map_elem_t audiobusio_i2sout_locals_dict_table[] = {
     // Properties
     { MP_ROM_QSTR(MP_QSTR_playing), MP_ROM_PTR(&audiobusio_i2sout_playing_obj) },
     { MP_ROM_QSTR(MP_QSTR_paused), MP_ROM_PTR(&audiobusio_i2sout_paused_obj) },
+#endif // CIRCUITPY_AUDIOBUSIO_I2SOUT
 };
 STATIC MP_DEFINE_CONST_DICT(audiobusio_i2sout_locals_dict, audiobusio_i2sout_locals_dict_table);
 
diff --git a/shared-bindings/audiobusio/I2SOut.h b/shared-bindings/audiobusio/I2SOut.h
index edf4ecfa0..55527dc73 100644
--- a/shared-bindings/audiobusio/I2SOut.h
+++ b/shared-bindings/audiobusio/I2SOut.h
@@ -32,6 +32,9 @@
 
 extern const mp_obj_type_t audiobusio_i2sout_type;
 
+// Some boards don't have the I2SOut pins available.
+#if CIRCUITPY_AUDIOBUSIO_I2SOUT
+
 void common_hal_audiobusio_i2sout_construct(audiobusio_i2sout_obj_t* self,
     const mcu_pin_obj_t* bit_clock, const mcu_pin_obj_t* word_select, const mcu_pin_obj_t* data,
     bool left_justified);
@@ -45,4 +48,6 @@ void common_hal_audiobusio_i2sout_pause(audiobusio_i2sout_obj_t* self);
 void common_hal_audiobusio_i2sout_resume(audiobusio_i2sout_obj_t* self);
 bool common_hal_audiobusio_i2sout_get_paused(audiobusio_i2sout_obj_t* self);
 
+#endif // CIRCUITPY_AUDIOBUSIO_I2SOUT
+
 #endif // MICROPY_INCLUDED_SHARED_BINDINGS_AUDIOBUSIO_I2SOUT_H