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Merge pull request #916 from dhalbert/pdmin_hack_fix

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Check for PDMIn DMA getting stuck.
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Scott Shawcroft 2018-06-08 14:03:53 -07:00 committed by GitHub
commit 4e4d795da5
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1 changed files with 11 additions and 0 deletions
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11
ports/atmel-samd/common-hal/audiobusio/PDMIn.c
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@ -392,7 +392,18 @@ uint32_t common_hal_audiobusio_pdmin_record_to_buffer(audiobusio_pdmin_obj_t* se
break;
}
// Wait for the next buffer to fill
uint32_t wait_counts = 0;
#ifdef SAMD21
#define MAX_WAIT_COUNTS 1000
#endif
#ifdef SAMD51
#define MAX_WAIT_COUNTS 6000
#endif
while (!event_interrupt_active(event_channel)) {
if (wait_counts++ > MAX_WAIT_COUNTS) {
// Buffer has stopped filling; DMA may have missed an I2S trigger event.
break;
}
#ifdef MICROPY_VM_HOOK_LOOP
MICROPY_VM_HOOK_LOOP
#endif