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Merge pull request #4809 from DavePutz/issue_4266

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Fix for Issue #4266 - second PWMAudioOut interferes with the first one
This commit is contained in:
Jeff Epler 2021-06-03 19:08:28 -05:00 committed by GitHub
commit a99eba35b8
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 5 additions and 2 deletions
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3
ports/raspberrypi/audio_dma.c
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@ -352,6 +352,8 @@ bool audio_dma_get_paused(audio_dma_t *dma) {
void audio_dma_init(audio_dma_t *dma) {
dma->first_buffer = NULL;
dma->second_buffer = NULL;
dma->channel[0] = NUM_DMA_CHANNELS;
dma->channel[1] = NUM_DMA_CHANNELS;
}
void audio_dma_deinit(audio_dma_t *dma) {
@ -368,7 +370,6 @@ bool audio_dma_get_playing(audio_dma_t *dma) {
}
if (!dma_channel_is_busy(dma->channel[0]) &&
!dma_channel_is_busy(dma->channel[1])) {
audio_dma_stop(dma);
return false;
}

4
ports/raspberrypi/common-hal/audiopwmio/PWMAudioOut.c
View File

@ -102,6 +102,7 @@ void common_hal_audiopwmio_pwmaudioout_construct(audiopwmio_pwmaudioout_obj_t *s
}
audio_dma_init(&self->dma);
self->pacing_timer = NUM_DMA_TIMERS;
self->quiescent_value = quiescent_value;
}
@ -126,6 +127,7 @@ void common_hal_audiopwmio_pwmaudioout_deinit(audiopwmio_pwmaudioout_obj_t *self
}
void common_hal_audiopwmio_pwmaudioout_play(audiopwmio_pwmaudioout_obj_t *self, mp_obj_t sample, bool loop) {
if (common_hal_audiopwmio_pwmaudioout_get_playing(self)) {
common_hal_audiopwmio_pwmaudioout_stop(self);
}
@ -135,9 +137,9 @@ void common_hal_audiopwmio_pwmaudioout_play(audiopwmio_pwmaudioout_obj_t *self,
for (size_t i = 0; i < NUM_DMA_TIMERS; i++) {
if (dma_hw->timer[i] == 0) {
pacing_timer = i;
}
break;
}
}
if (pacing_timer == NUM_DMA_TIMERS) {
mp_raise_RuntimeError(translate("No DMA pacing timer found"));
}