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2.x mic filter bug: Error in PDMIn filter loop #497

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Merged
tannewt merged 1 commit into from
Dec 21, 2017
Merged

2.x mic filter bug: Error in PDMIn filter loop #497

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3 changes: 2 additions & 1 deletion atmel-samd/common-hal/audiobusio/PDMIn.c
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Original file line number Diff line number Diff line change
Expand Up @@ -273,8 +273,9 @@ static uint16_t filter_sample(uint32_t pdm_samples[4]) {
uint32_t pdm_sample = pdm_samples[i];
REPEAT_16_TIMES( {
if (pdm_sample & 0x8000) {
running_sum += *filter_ptr++;
running_sum += *filter_ptr;
}
filter_ptr++;
pdm_sample <<= 1;
}
)
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