Add mcp4822 DAC module for audio streaming and mtm_computer updates

locale/circuitpython.pot

@@ -113,6 +113,7 @@ msgstr ""
 
 #: ports/espressif/common-hal/espulp/ULP.c
 #: ports/espressif/common-hal/mipidsi/Bus.c
+#: ports/espressif/common-hal/qspibus/QSPIBus.c
 #: ports/mimxrt10xx/common-hal/audiobusio/__init__.c
 #: ports/mimxrt10xx/common-hal/usb_host/Port.c
 #: ports/raspberrypi/common-hal/picodvi/Framebuffer_RP2040.c
@@ -135,6 +136,7 @@ msgstr ""
 
 #: ports/analog/common-hal/busio/SPI.c ports/analog/common-hal/busio/UART.c
 #: shared-bindings/digitalio/DigitalInOutProtocol.c
+#: shared-module/busdisplay/BusDisplay.c
 msgid "%q init failed"
 msgstr ""
 
@@ -622,6 +624,7 @@ msgstr ""
 
 #: ports/raspberrypi/common-hal/audiobusio/I2SOut.c
 #: ports/raspberrypi/common-hal/audiopwmio/PWMAudioOut.c
+#: ports/raspberrypi/common-hal/mcp4822/MCP4822.c
 msgid "Audio source error"
 msgstr ""
 
@@ -856,8 +859,7 @@ msgstr ""
 msgid "Coordinate arrays types have different sizes"
 msgstr ""
 
-#: shared-module/usb/core/Device.c
-#: ports/espressif/common-hal/qspibus/QSPIBus.c
+#: ports/espressif/common-hal/qspibus/QSPIBus.c shared-module/usb/core/Device.c
 msgid "Could not allocate DMA capable buffer"
 msgstr ""
 
@@ -1023,10 +1025,6 @@ msgstr ""
 msgid "Failed to buffer the sample"
 msgstr ""
 
-#: ports/zephyr-cp/common-hal/_bleio/Adapter.c
-msgid "Failed to connect"
-msgstr ""
-
 #: ports/espressif/common-hal/_bleio/Adapter.c
 #: ports/nordic/common-hal/_bleio/Adapter.c
 #: ports/zephyr-cp/common-hal/_bleio/Adapter.c
@@ -1242,8 +1240,8 @@ msgstr ""
 msgid "Internal define error"
 msgstr ""
 
-#: ports/espressif/common-hal/qspibus/QSPIBus.c
-#: shared-bindings/pwmio/PWMOut.c supervisor/shared/settings.c
+#: ports/espressif/common-hal/qspibus/QSPIBus.c shared-bindings/pwmio/PWMOut.c
+#: supervisor/shared/settings.c
 msgid "Internal error"
 msgstr ""
 
@@ -1518,8 +1516,7 @@ msgstr ""
 #: ports/stm/common-hal/busio/UART.c shared-bindings/fourwire/FourWire.c
 #: shared-bindings/i2cdisplaybus/I2CDisplayBus.c
 #: shared-bindings/paralleldisplaybus/ParallelBus.c
-#: shared-bindings/qspibus/QSPIBus.c
-#: shared-module/bitbangio/SPI.c
+#: shared-bindings/qspibus/QSPIBus.c shared-module/bitbangio/SPI.c
 msgid "No %q pin"
 msgstr ""
 
@@ -1537,6 +1534,7 @@ msgstr ""
 #: ports/atmel-samd/common-hal/audioio/AudioOut.c
 #: ports/raspberrypi/common-hal/audiobusio/I2SOut.c
 #: ports/raspberrypi/common-hal/audiopwmio/PWMAudioOut.c
+#: ports/raspberrypi/common-hal/mcp4822/MCP4822.c
 msgid "No DMA channel found"
 msgstr ""
 
@@ -1651,7 +1649,7 @@ msgid "Not connected"
 msgstr ""
 
 #: shared-bindings/audiobusio/I2SOut.c shared-bindings/audioio/AudioOut.c
-#: shared-bindings/audiopwmio/PWMAudioOut.c
+#: shared-bindings/audiopwmio/PWMAudioOut.c shared-bindings/mcp4822/MCP4822.c
 msgid "Not playing"
 msgstr ""
 
@@ -2168,6 +2166,7 @@ msgid "Too many channels in sample"
 msgstr ""
 
 #: ports/raspberrypi/common-hal/audiobusio/I2SOut.c
+#: ports/raspberrypi/common-hal/mcp4822/MCP4822.c
 msgid "Too many channels in sample."
 msgstr ""
 
@@ -2266,6 +2265,7 @@ msgstr ""
 #: ports/atmel-samd/common-hal/audioio/AudioOut.c
 #: ports/raspberrypi/common-hal/audiobusio/I2SOut.c
 #: ports/raspberrypi/common-hal/audiopwmio/PWMAudioOut.c
+#: ports/raspberrypi/common-hal/mcp4822/MCP4822.c
 msgid "Unable to allocate buffers for signed conversion"
 msgstr ""
 
@@ -3040,6 +3040,10 @@ msgstr ""
 msgid "cross is defined for 1D arrays of length 3"
 msgstr ""
 
+#: ports/raspberrypi/common-hal/mcp4822/MCP4822.c
+msgid "cs pin must be 1-4 positions above mosi pin"
+msgstr ""
+
 #: extmod/ulab/code/scipy/optimize/optimize.c
 msgid "data must be iterable"
 msgstr ""
@@ -3237,10 +3241,6 @@ msgstr ""
 msgid "float unsupported"
 msgstr ""
 
-#: shared-bindings/_stage/Text.c
-msgid "font must be 2048 bytes long"
-msgstr ""
-
 #: extmod/moddeflate.c
 msgid "format"
 msgstr ""
@@ -3310,6 +3310,10 @@ msgstr ""
 msgid "function takes %d positional arguments but %d were given"
 msgstr ""
 
+#: shared-bindings/mcp4822/MCP4822.c
+msgid "gain must be 1 or 2"
+msgstr ""
+
 #: py/objgenerator.c
 msgid "generator already executing"
 msgstr ""
@@ -3322,10 +3326,6 @@ msgstr ""
 msgid "generator raised StopIteration"
 msgstr ""
 
-#: shared-bindings/_stage/Layer.c
-msgid "graphic must be 2048 bytes long"
-msgstr ""
-
 #: extmod/modhashlib.c
 msgid "hash is final"
 msgstr ""
@@ -4047,10 +4047,6 @@ msgstr ""
 msgid "pack expected %d items for packing (got %d)"
 msgstr ""
 
-#: shared-bindings/_stage/Layer.c shared-bindings/_stage/Text.c
-msgid "palette must be 32 bytes long"
-msgstr ""
-
 #: py/emitinlinerv32.c
 msgid "parameters must be registers in sequence a0 to a3"
 msgstr ""

ports/raspberrypi/boards/mtm_computer/board.c

@@ -5,5 +5,24 @@
 // SPDX-License-Identifier: MIT
 
 #include "supervisor/board.h"
+#include "shared-bindings/mcp4822/MCP4822.h"
+#include "shared-bindings/microcontroller/Pin.h"
+#include "peripherals/pins.h"
+#include "py/runtime.h"
+
+// board.DAC() — factory function that constructs an mcp4822.MCP4822 with
+// the MTM Workshop Computer's DAC pins (GP18=SCK, GP19=SDI, GP21=CS).
+static mp_obj_t board_dac_factory(void) {
+    mcp4822_mcp4822_obj_t *dac = mp_obj_malloc_with_finaliser(
+        mcp4822_mcp4822_obj_t, &mcp4822_mcp4822_type);
+    common_hal_mcp4822_mcp4822_construct(
+        dac,
+        &pin_GPIO18,   // clock (SCK)
+        &pin_GPIO19,   // mosi (SDI)
+        &pin_GPIO21,   // cs
+        1);            // gain 1x
+    return MP_OBJ_FROM_PTR(dac);
+}
+MP_DEFINE_CONST_FUN_OBJ_0(board_dac_obj, board_dac_factory);
 
 // Use the MP_WEAK supervisor/shared/board.c versions of routines not defined here.

ports/raspberrypi/boards/mtm_computer/mpconfigboard.mk

@@ -11,3 +11,4 @@ EXTERNAL_FLASH_DEVICES = "W25Q16JVxQ"
 CIRCUITPY_AUDIOEFFECTS = 1
 CIRCUITPY_IMAGECAPTURE = 0
 CIRCUITPY_PICODVI = 0
+CIRCUITPY_MCP4822 = 1

ports/raspberrypi/boards/mtm_computer/pins.c

@@ -6,6 +6,8 @@
 
 #include "shared-bindings/board/__init__.h"
 
+extern const mp_obj_fun_builtin_fixed_t board_dac_obj;
+
 static const mp_rom_map_elem_t board_module_globals_table[] = {
     CIRCUITPYTHON_BOARD_DICT_STANDARD_ITEMS
 
@@ -21,7 +23,6 @@ static const mp_rom_map_elem_t board_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_PULSE_2_IN), MP_ROM_PTR(&pin_GPIO3) },
     { MP_ROM_QSTR(MP_QSTR_GP3), MP_ROM_PTR(&pin_GPIO3) },
 
-
     { MP_ROM_QSTR(MP_QSTR_NORM_PROBE), MP_ROM_PTR(&pin_GPIO4) },
     { MP_ROM_QSTR(MP_QSTR_GP4), MP_ROM_PTR(&pin_GPIO4) },
 
@@ -105,6 +106,9 @@ static const mp_rom_map_elem_t board_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A3), MP_ROM_PTR(&pin_GPIO29) },
     { MP_ROM_QSTR(MP_QSTR_GP29), MP_ROM_PTR(&pin_GPIO29) },
 
+    // Factory function: dac = board.DAC() returns a configured mcp4822.MCP4822
+    { MP_ROM_QSTR(MP_QSTR_DAC), MP_ROM_PTR(&board_dac_obj) },
+
     // { MP_ROM_QSTR(MP_QSTR_EEPROM_I2C), MP_ROM_PTR(&board_i2c_obj) },
 };
 MP_DEFINE_CONST_DICT(board_module_globals, board_module_globals_table);