mirror of
https://github.com/pschatzmann/arduino-audio-tools.git
synced 2024-09-21 10:27:27 +00:00
3.2 KiB
3.2 KiB
ESP32 Configuration
If you are using ESP32 by Espressif Systems version 3.0.0 and later, audio tools will use the new adc_continuous API. This board option is under development and changing.
For the adc_continuous API, audio tools provides the following options:
- sample_rate (per channel), the effective ADC sampling rate is the number of channels x sample rate and can be:
- ESP32: 20kHz to 2MHz
- other ESP32 eg. ESP32S3 611Hz to 83kHz
for example:
- 306
- 4,000
- 5,000
- 8,000
- 10,000
- 11,025
- 16,000
- 20,000
- 22,050
- 40,000
- 44,100
- 48,000
- 88,200
- 96,000
- 176,400
- 192,200
- 352,800
- 384,000
- 500,000
- 1,000,000
-
adc_bit_with
- 9, 10, 11, 12 depending on ESP32 model
- audio stream is int16_t
-
adc_calibration_active: values measured are in mV
-
is_auto_center_read: subtraction of current estimated average from samples
-
adc_attenuation:
attenuation range accurate range ADC_ATTEN_DB_0 0..1.1V 100-950mV ADC_ATTEN_DB_2_5 0..1.5V 100-1250mV ADC_ATTEN_DB_6 0..2.2V 150-1750mV ADC_ATTEN_DB_12 0..3.9V 150-2450mV -
channels:
- mono = 1
- stereo = 2
-
adc_channels: defining the channels (only channels on ADC unit 1 are supported) e.g.:
- A3 on Sparkfun ESP32 Thing Plus is ADC_CHANNEL_3
- A4 on Sparkfun ESP32 Thing Plus is ADC_CHANNEL_0
- D5 on Adafruit ESP32-S3 is ADC_CHANNEL_4
- D6 on Adafruit ESP32-S3 is ADC_CHANNEL_5
Example Configuration
auto adcConfig = adc.defaultConfig(RX_MODE);
adcConfig.sample_rate = 44100;
adcConfig.adc_bit_width = 12;
adcConfig.adc_calibration_active = true;
adcConfig.is_auto_center_read = false;
adcConfig.adc_attenuation = ADC_ATTEN_DB_12;
adcConfig.channels = 2;
adcConfig.adc_channels[0] = ADC_CHANNEL_4;
adcConfig.adc_channels[1] = ADC_CHANNEL_5;
ADC unit 1 channels on common ESP32 boards
Audio tools supports ADC Unit 1 only.
Sparkfun ESP32 Thing Plus (ESP32)
- A2, ADC1_CH6
- A3, ADC1_CH3
- A4, ADC1_CH0
- 32, ADC1_CH4
- 33, ADC1_CH5
Sparkfun ESP32 Qwiic Pocket Development (ESP32C6)
- 2, ADC1_CH2
- 3, ADC1_CH3
- 4, ADC1_CH4
- 5, ADC1_CH5
ESP32-C6-DevKit
- 4, ADC1_CH4
- 5, ADC1_CH5
- 6, ADC1_CH6
- 7, ADC1_CH0
- 0, ADC1_CH1
- 2, ADC1_CH2
- 3, ADC1_CH3
ESP32-H2-DevKit
- 1, ADC1_CH0
- 2, ADC1_CH1
- 3, ADC1_CH2
- 4, ADC1_CH3
- 5, ADC1_CH4
ESP32-S3-DevKit
- 1, ADC1_CH0
- 2, ADC1_CH1
- 4, ADC1_CH3
- 5, ADC1_CH4
- 6, ADC1_CH5
- 7, ADC1_CH6
- 8, ADC1_CH7
- 3, ADC1_CH2
- 9, ADC1_CH8
- 10, ADC1_CH9
ESP32-C3-DevKit
- 4, IO2, ADC1_CH2
- 5, IO3, ADC1_CH3
- 9, IO0, ADC1_CH0
- 10, IO1, ADC1_CH1
- 11, IO4, ADC1_CH4
Adafruit ESP32 Feather V2
- D32, ADC1_CH4
- D33, ADC1_CH5
- A2, ADC1_CH6
- A3, ADC1_CH3
- A4, ADC1_CH0
- D37, ADC1_CH1
Adafruit ESP32-S3 Feather
- D5, ADC1_CH4
- D6, ADC1_CH5
- D9, ADC1_CH8
- D10, ADC1_CH9
- A5, ADC1_CH7
Adafruit QT Py ESP32-C3
- A0, ADC1-CH4
- A1, ADC1-CH3
- A2, ADC1-CH1
- A3, ADC1-CH0