[stm] implementation of audiopwmio

Based on nrf PWMAudioOut by @jepler and stm PulseOut by @hierophect

Tested on a Meowbit

Author: tyomitch

locale/circuitpython.pot

@@ -73,6 +73,7 @@ msgstr ""
 #: extmod/moductypes.c ports/atmel-samd/common-hal/pulseio/PulseIn.c
 #: ports/cxd56/common-hal/pulseio/PulseIn.c
 #: ports/nrf/common-hal/pulseio/PulseIn.c
+#: ports/raspberrypi/common-hal/pulseio/PulseIn.c
 #: ports/stm/common-hal/pulseio/PulseIn.c py/obj.c py/objstr.c
 #: py/objstrunicode.c
 msgid "%q index out of range"
@@ -406,6 +407,10 @@ msgstr ""
 msgid "AnalogOut not supported on given pin"
 msgstr ""
 
+#: ports/stm/common-hal/audiopwmio/PWMAudioOut.c
+msgid "Another PWMAudioOut is already active"
+msgstr ""
+
 #: ports/atmel-samd/common-hal/pulseio/PulseOut.c
 #: ports/cxd56/common-hal/pulseio/PulseOut.c
 msgid "Another send is already active"
@@ -520,6 +525,7 @@ msgid "Buffer is too small"
 msgstr ""
 
 #: ports/nrf/common-hal/audiopwmio/PWMAudioOut.c
+#: ports/stm/common-hal/audiopwmio/PWMAudioOut.c
 #, c-format
 msgid "Buffer length %d too big. It must be less than %d"
 msgstr ""
@@ -962,6 +968,7 @@ msgstr ""
 #: ports/cxd56/common-hal/pulseio/PulseIn.c
 #: ports/esp32s2/common-hal/pulseio/PulseIn.c
 #: ports/nrf/common-hal/pulseio/PulseIn.c
+#: ports/raspberrypi/common-hal/pulseio/PulseIn.c
 #: ports/stm/common-hal/pulseio/PulseIn.c
 #, c-format
 msgid "Failed to allocate RX buffer of %d bytes"
@@ -975,6 +982,10 @@ msgstr ""
 msgid "Failed to allocate wifi scan memory"
 msgstr ""
 
+#: ports/stm/common-hal/audiopwmio/PWMAudioOut.c
+msgid "Failed to buffer the sample"
+msgstr ""
+
 #: ports/nrf/common-hal/_bleio/Adapter.c
 msgid "Failed to connect: internal error"
 msgstr ""
@@ -1247,7 +1258,7 @@ msgstr ""
 msgid "Invalid format chunk size"
 msgstr ""
 
-#: ports/esp32s2/common-hal/pwmio/PWMOut.c
+#: ports/esp32s2/common-hal/busio/I2C.c ports/esp32s2/common-hal/pwmio/PWMOut.c
 msgid "Invalid frequency"
 msgstr ""
 
@@ -2291,7 +2302,7 @@ msgstr ""
 msgid "Unsupported format"
 msgstr ""
 
-#: py/moduerrno.c
+#: ports/raspberrypi/common-hal/pulseio/PulseOut.c py/moduerrno.c
 msgid "Unsupported operation"
 msgstr ""
 
@@ -3699,6 +3710,7 @@ msgstr ""
 #: ports/atmel-samd/common-hal/pulseio/PulseIn.c
 #: ports/cxd56/common-hal/pulseio/PulseIn.c
 #: ports/nrf/common-hal/pulseio/PulseIn.c
+#: ports/raspberrypi/common-hal/pulseio/PulseIn.c
 #: ports/stm/common-hal/pulseio/PulseIn.c py/objdict.c py/objlist.c py/objset.c
 #: shared-bindings/ps2io/Ps2.c
 msgid "pop from empty %q"
@@ -3724,6 +3736,8 @@ msgstr ""
 #: ports/esp32s2/boards/espressif_kaluga_1/mpconfigboard.h
 #: ports/esp32s2/boards/espressif_saola_1_wroom/mpconfigboard.h
 #: ports/esp32s2/boards/espressif_saola_1_wrover/mpconfigboard.h
+#: ports/esp32s2/boards/franzininho_wifi_wroom/mpconfigboard.h
+#: ports/esp32s2/boards/franzininho_wifi_wrover/mpconfigboard.h
 #: ports/esp32s2/boards/lilygo_ttgo_t8_s2_st7789/mpconfigboard.h
 #: ports/esp32s2/boards/microdev_micro_s2/mpconfigboard.h
 #: ports/esp32s2/boards/muselab_nanoesp32_s2/mpconfigboard.h