Commit Graph

8 Commits

Author SHA1 Message Date
Dan Halbert b8b23c97d9 improve SAMD audio DMA 2021-08-21 14:34:37 -04:00
Dan Halbert 24e61a7da8 Track more carefully which audio buffers to fill, based on interrupt channels 2021-08-10 22:00:09 -04:00
Dan Halbert 2451c788f4 valid channels in audio_dma_stop; cleaner supervisor_ticks mgmt in keypad 2021-08-09 09:47:13 -04:00
Dan Halbert 59b89fdc5c Fix various audio DMA issues:
RP2040 and SAMD51:
- Detect when DMA has finished, and stop DMA audio explicitly.
- Do not accidentally reuse `first_buffer` supplied by WaveFile or RawSample. Always realloc `first_buffer` and `second_buffer`

RP2040:
- When audio playing is stopped, write a final zero to the output register. This prevents residual PWM tones.
- Handle buffer size for 8-bit samples properly for 16-bit output.
- Fail on some edge cases (which may not be possible at the moment).
2021-08-09 09:47:13 -04:00
Dan Halbert 2cd80d1074 wip, with debugging printf's 2021-08-09 09:47:13 -04:00
Dan Halbert 33bbb8b1f4 RP2040 PWMAudioOut: Release DMA channels after play has finished. 2021-07-01 17:36:29 -04:00
microDev a52eb88031
run code formatting script 2021-03-15 19:27:36 +05:30
Scott Shawcroft 191b143e7b
Add PWM based audio playback
See
https://learn.adafruit.com/circuitpython-essentials/circuitpython-audio-out
to get started.

Fixes #4037
2021-02-09 15:38:33 -08:00