ports/stm: add audioio.AudioOut for STM32F405/F407

locale/circuitpython.pot

@@ -140,6 +140,7 @@ msgid "%q indices must be integers, not %s"
 msgstr ""
 
 #: ports/analog/common-hal/busio/SPI.c ports/analog/common-hal/busio/UART.c
+#: ports/stm/common-hal/audioio/AudioOut.c
 #: shared-bindings/digitalio/DigitalInOutProtocol.c
 #: shared-module/busdisplay/BusDisplay.c
 msgid "%q init failed"
@@ -889,10 +890,12 @@ msgid "Critical ROS failure during soft reboot, reset required: %d"
 msgstr ""
 
 #: ports/stm/common-hal/analogio/AnalogOut.c
+#: ports/stm/common-hal/audioio/AudioOut.c
 msgid "DAC Channel Init Error"
 msgstr ""
 
 #: ports/stm/common-hal/analogio/AnalogOut.c
+#: ports/stm/common-hal/audioio/AudioOut.c
 msgid "DAC Device Init Error"
 msgstr ""
 
@@ -1541,6 +1544,7 @@ msgstr ""
 
 #: ports/atmel-samd/common-hal/analogio/AnalogOut.c
 #: ports/stm/common-hal/analogio/AnalogOut.c
+#: ports/stm/common-hal/audioio/AudioOut.c
 msgid "No DAC on chip"
 msgstr ""
 
@@ -4049,7 +4053,7 @@ msgstr ""
 msgid "output array must be contiguous"
 msgstr ""
 
-#: py/objint_mpz.c
+#: py/objint_longlong.c py/objint_mpz.c
 msgid "overflow converting long int to machine word"
 msgstr ""
 
@@ -4162,6 +4166,10 @@ msgstr ""
 msgid "rsplit(None,n)"
 msgstr ""
 
+#: ports/stm/common-hal/audioio/AudioOut.c
+msgid "sample_rate must be > 0"
+msgstr ""
+
 #: shared-bindings/audiofreeverb/Freeverb.c
 msgid "samples_signed must be true"
 msgstr ""

ports/stm/common-hal/analogio/AnalogOut.h

@@ -28,3 +28,9 @@ typedef struct {
 } analogio_analogout_obj_t;
 
 void analogout_reset(void);
+
+// Shared DAC peripheral handle (defined in AnalogOut.c).
+// AudioOut reuses this handle for DMA-triggered DAC operation on channel 1.
+#if HAS_DAC
+extern DAC_HandleTypeDef handle;
+#endif