Merge pull request #4167 from tannewt/rp2040_audiopwmio

Add PWM based audio playback

.gitattributes

@@ -18,6 +18,7 @@
 *.deb binary
 *.zip binary
 *.pdf binary
+*.wav binary
 
 # These should also not be modified by git.
 tests/basics/string_cr_conversion.py -text

locale/circuitpython.pot

@@ -363,6 +363,7 @@ msgstr ""
 #: ports/esp32s2/common-hal/pulseio/PulseOut.c
 #: ports/nrf/common-hal/audiopwmio/PWMAudioOut.c
 #: ports/nrf/common-hal/pulseio/PulseIn.c ports/nrf/peripherals/nrf/timers.c
+#: ports/raspberrypi/common-hal/audiopwmio/PWMAudioOut.c
 #: ports/stm/peripherals/timers.c shared-bindings/pwmio/PWMOut.c
 msgid "All timers in use"
 msgstr ""
@@ -1446,9 +1447,14 @@ msgstr ""
 
 #: ports/atmel-samd/common-hal/audiobusio/I2SOut.c
 #: ports/atmel-samd/common-hal/audioio/AudioOut.c
+#: ports/raspberrypi/common-hal/audiopwmio/PWMAudioOut.c
 msgid "No DMA channel found"
 msgstr ""
 
+#: ports/raspberrypi/common-hal/audiopwmio/PWMAudioOut.c
+msgid "No DMA pacing timer found"
+msgstr ""
+
 #: shared-module/adafruit_bus_device/I2CDevice.c
 #, c-format
 msgid "No I2C device at address: %x"
@@ -1724,6 +1730,10 @@ msgid ""
 "constructor"
 msgstr ""
 
+#: ports/raspberrypi/common-hal/audiopwmio/PWMAudioOut.c
+msgid "Pins must share PWM slice"
+msgstr ""
+
 #: py/builtinhelp.c
 msgid "Plus any modules on the filesystem\n"
 msgstr ""
@@ -1963,6 +1973,14 @@ msgstr ""
 msgid "Stack size must be at least 256"
 msgstr ""
 
+#: ports/raspberrypi/common-hal/audiopwmio/PWMAudioOut.c
+msgid "Stereo left must be on PWM channel A"
+msgstr ""
+
+#: ports/raspberrypi/common-hal/audiopwmio/PWMAudioOut.c
+msgid "Stereo right must be on PWM channel B"
+msgstr ""
+
 #: shared-bindings/multiterminal/__init__.c
 msgid "Stream missing readinto() or write() method."
 msgstr ""
@@ -2126,6 +2144,7 @@ msgstr ""
 
 #: ports/atmel-samd/common-hal/audiobusio/I2SOut.c
 #: ports/atmel-samd/common-hal/audioio/AudioOut.c
+#: ports/raspberrypi/common-hal/audiopwmio/PWMAudioOut.c
 msgid "Unable to allocate buffers for signed conversion"
 msgstr ""
 

ports/raspberrypi/Makefile

@@ -196,6 +196,7 @@ SRC_C += \
 	bindings/rp2pio/__init__.c \
 	common-hal/rp2pio/StateMachine.c \
 	common-hal/rp2pio/__init__.c \
+	audio_dma.c \
 	background.c \
 	peripherals/pins.c \
 	fatfs_port.c \