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This commit is contained in:
David Gwilliam
2026-02-12 21:00:02 -08:00
parent 77f8236347
commit 8bdbf227ca
1141 changed files with 1010880 additions and 2 deletions
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44
libraries/audio-tools/examples/tests/adc/read-csv/read-csv.ino Normal file
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/**
* @file read-csv.ino
* @author Phil Schatzmann
* @brief Test case for the new continuous API of the ESP32:
* Default Pins ESP32: 34, 35 (ADC_CHANNEL_6, ADC_CHANNEL_7)
* Default Pins ESP32C3: 2, 3 (ADC_CHANNEL_2, ADC_CHANNEL_3)
* @version 0.1
* @date 2023-11-01
*
* @copyright Copyright (c) 2023
*/
#include "AudioTools.h"
typedef int16_t audio_t;
AudioInfo info(44100, 1, 8 * sizeof(audio_t));
// input
AnalogAudioStream in;
CsvOutput<audio_t> csv(Serial); // ASCII output stream
StreamCopy copy_in(csv, in);
// Arduino Setup
void setup(void) {
// Open Serial
Serial.begin(115200);
AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
auto cfg_rx = in.defaultConfig(RX_MODE);
// cfg_rx.is_auto_center_read = false;
// cfg_rx.adc_calibration_active = true;
cfg_rx.copyFrom(info);
in.begin(cfg_rx);
// open output
csv.begin(info);
Serial.println("started...");
}
// Arduino loop - copy sound to out
void loop() {
copy_in.copy();
}

43
libraries/audio-tools/examples/tests/adc/read-csv_unsigned/read-csv_unsigned.ino Normal file
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/**
* @file read-csv.ino
* @author Phil Schatzmann
* @brief Test case for the new continuous API of the ESP32:
* Default Pins ESP32: 34, 35 (ADC_CHANNEL_6, ADC_CHANNEL_7)
* Default Pins ESP32C3: 2, 3 (ADC_CHANNEL_2, ADC_CHANNEL_3)
* @version 0.1
* @date 2023-11-01
*
* @copyright Copyright (c) 2023
*/
#include "AudioTools.h"
typedef uint16_t audio_t;
AudioInfo info(44100, 1, 8 * sizeof(audio_t));
// input
AnalogAudioStream in;
CsvOutput<audio_t> csv(Serial); // ASCII output stream
StreamCopy copy_in(csv, in);
// Arduino Setup
void setup(void) {
// Open Serial
Serial.begin(115200);
AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
auto cfg_rx = in.defaultConfig(RX_MODE);
//cfg_rx.is_auto_center_read = false;
//cfg_rx.adc_calibration_active = true;
cfg_rx.copyFrom(info);
in.begin(cfg_rx);
// open output
csv.begin(info);
Serial.println("started...");
}
// Arduino loop - copy sound to out
void loop() {
copy_in.copy();
}

89
libraries/audio-tools/examples/tests/adc/read-esp32-multi-channel-csv/read-esp32-multi-channel-csv.ino Normal file
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/**
* @file read-esp32-multi-channel-csv.ino
* @author Urs Utzinger
* @copyright GPLv3
*/
// | 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 |
#include "Arduino.h"
#include "AudioTools.h"
#define NUM_CHANNELS 6 // number of channels
#define DEC_FACTOR 48 // decimating
#define ADC_ATTENUATION ADC_ATTEN_DB_12 // ADC attenuation, see above
#define ADC_BIT_WIDTH 12 // the ADC bit width 9..12, values will be stored in 16 bit integers
#define BIT_DEPTH 16 // default bit width of data returned from analgo_in. Do not change.
// It looks like Buffer larger than 1024 is capped by stream copy for decimater or csvoutput
#define BUFFER_SIZE_FACTOR (1024/ (NUM_CHANNELS*DEC_FACTOR*BIT_DEPTH/8)) // 3.5
#define ADC_BUFFER_SIZE (NUM_CHANNELS*DEC_FACTOR*BUFFER_SIZE_FACTOR) // Total number of samples (not bytes), needs to be divisible by 4 // 3*3*96 = 864
#define BUFFER_SIZE ADC_BUFFER_SIZE*BIT_DEPTH/8 // Number of bytes for processing buffer
#define SERIAL_BUFFER_SIZE BUFFER_SIZE/DEC_FACTOR // There will be factor times less data after decimating
// Sampling rates
#define SERIAL_SAMPLE_RATE 300 // samples per channel per second
#define SAMPLE_RATE SERIAL_SAMPLE_RATE*DEC_FACTOR // number of samples per channel before decimating
#define ADC_SAMPLE_RATE SAMPLE_RATE*NUM_CHANNELS // actual sampling rate of ADC
// BAUD rate required: SERIAL_SAMPLE_RATE * (NUM_CHANNELS * approx 6 chars + 2 EOL) * 10 approx 40,000 baud
#define ADC0 ADC_CHANNEL_7 // ADC channel 0
#define ADC1 ADC_CHANNEL_0 // ADC channel 1
#define ADC2 ADC_CHANNEL_3 // ADC channel 2
#define ADC3 ADC_CHANNEL_6 // ADC channel 3
#define ADC4 ADC_CHANNEL_4 // ADC channel 4
#define ADC5 ADC_CHANNEL_5 // ADC channel 5
#define ADC6 ADC_CHANNEL_1 // ADC channel 6, not routed on the ESP32 WROOM module
#define ADC7 ADC_CHANNEL_2 // ADC channel 7, not routed on ESP32 WROOM module
#define ADC8 ADC_CHANNEL_8 // ADC channel 8, only ESP32S3,S2
#define ADC9 ADC_CHANNEL_9 // ADC channel 9, only ESP32S3,S2
AudioInfo info_serial(SERIAL_SAMPLE_RATE, NUM_CHANNELS, BIT_DEPTH);
AnalogAudioStream analog_in; // on board analog to digital converter
Decimate decimater(DEC_FACTOR, NUM_CHANNELS, BIT_DEPTH); // skip samples
ConverterStream<int16_t> decimated_stream(analog_in, decimater); // pipe the sound to the decimater
CsvOutput<int16_t> serial_out(Serial, NUM_CHANNELS, SERIAL_BUFFER_SIZE); // serial output
StreamCopy copier(serial_out, decimated_stream, BUFFER_SIZE); // stream the decimated output to serial port
// Arduino Setup
void setup(void) {
Serial.begin(115200);
while (!Serial);
// Include logging to serial, If you want no logging comment this line
AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning); // Error, Warning, Info, Debug
auto adcConfig = analog_in.defaultConfig(RX_MODE);
// For ESP32 by Espressif Systems version 3.0.0 and later:
// see examples/README_ESP32.md
adcConfig.sample_rate = SAMPLE_RATE; // sample rate per channel
adcConfig.channels = NUM_CHANNELS; // up to 6 channels
adcConfig.adc_bit_width = ADC_BIT_WIDTH; // Supports only 12
adcConfig.buffer_size = ADC_BUFFER_SIZE; // in total number of samples
adcConfig.adc_calibration_active = true; // use and apply the calibration settings of ADC stored in ESP32
adcConfig.is_auto_center_read = false; // do not engage auto-centering of signal (would subtract average of signal)
adcConfig.adc_attenuation = ADC_ATTENUATION; // set analog input range
adcConfig.adc_channels[0] = ADC0; // ensure configuration for each channel
adcConfig.adc_channels[1] = ADC1;
adcConfig.adc_channels[2] = ADC2;
adcConfig.adc_channels[3] = ADC3;
adcConfig.adc_channels[4] = ADC4;
adcConfig.adc_channels[5] = ADC5;
analog_in.begin(adcConfig);
serial_out.begin(info_serial);
}
// Arduino loop
void loop() {
copier.copy();
}

45
libraries/audio-tools/examples/tests/adc/read-speed/read-speed.ino Normal file
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/**
* @file read.ino
* @author Phil Schatzmann
* @brief reads the data from the ADC
* Default Pins ESP32: 34, 35 (ADC_CHANNEL_6, ADC_CHANNEL_7)
* Default Pins ESP32C3: 2, 3 (ADC_CHANNEL_2, ADC_CHANNEL_3)
* @version 0.1
* @date 2023-11-11
*
* @copyright Copyright (c) 2023
*/
#include "AudioTools.h"
AudioInfo info(44100, 2, 16);
AnalogAudioStream adc;
MeasuringStream out(10, &Serial);
StreamCopy copier(out, adc);
// Arduino Setup
void setup(void) {
Serial.begin(115200);
AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
#ifdef ESP32
LOGI("Supported samples rates: %d - %d", SOC_ADC_SAMPLE_FREQ_THRES_LOW, SOC_ADC_SAMPLE_FREQ_THRES_HIGH);
LOGI("Supported bit width: %d - %d", SOC_ADC_DIGI_MIN_BITWIDTH, SOC_ADC_DIGI_MAX_BITWIDTH);
#endif
auto cfg = adc.defaultConfig(RX_MODE);
cfg.copyFrom(info);
//cfg.use_apll = false; // try with yes
if (!adc.begin(cfg)) {
LOGE("adc.begin() failed");
stop();
}
// make sure that we have the correct channels set up
out.begin(info);
}
// Arduino loop - copy data
void loop() {
copier.copy();
}