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AR: small improvement for ADC analog mics

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ensure that ADC parameters are properly configured.
This commit is contained in:
Frank 2022-09-19 13:30:13 +02:00
parent 6f8deb83e3
commit 90b3f009af
1 changed files with 5 additions and 1 deletions
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6
usermods/audioreactive/audio_source.h
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@ -444,13 +444,17 @@ class I2SAdcSource : public I2SSource {
return; return;
} }
adc1_config_width(ADC_WIDTH_BIT_12); // ensure that ADC runs with 12bit resolution
// Enable I2S mode of ADC // Enable I2S mode of ADC
err = i2s_set_adc_mode(ADC_UNIT_1, adc1_channel_t(channel)); err = i2s_set_adc_mode(ADC_UNIT_1, adc1_channel_t(channel));
if (err != ESP_OK) { if (err != ESP_OK) {
DEBUGSR_PRINTF("Failed to set i2s adc mode: %d\n", err); DEBUGSR_PRINTF("Failed to set i2s adc mode: %d\n", err);
return; return;
} }
// adc1_config_channel_atten(adc1_channel_t(channel), ADC_ATTEN_DB_11)); //see https://github.com/espressif/arduino-esp32/blob/master/libraries/ESP32/examples/I2S/HiFreq_ADC/HiFreq_ADC.ino
// see example in https://github.com/espressif/arduino-esp32/blob/master/libraries/ESP32/examples/I2S/HiFreq_ADC/HiFreq_ADC.ino
adc1_config_channel_atten(adc1_channel_t(channel), ADC_ATTEN_DB_11); // configure ADC input amplification
#if defined(I2S_GRAB_ADC1_COMPLETELY) #if defined(I2S_GRAB_ADC1_COMPLETELY)
// according to docs from espressif, the ADC needs to be started explicitly // according to docs from espressif, the ADC needs to be started explicitly