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Sep 25, 2025
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adding pcm5122 arduino example #3126

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f684596
adding pcm5122 arduino example
BlitzCityDIY Sep 24, 2025
aa04bf1
Update library.deps
BlitzCityDIY Sep 24, 2025
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Empty file added PCM5122_Examples/Arduino_PCM5122/.feather_rp2040.test.only
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274 changes: 274 additions & 0 deletions PCM5122_Examples/Arduino_PCM5122/Arduino_PCM5122.ino
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// SPDX-FileCopyrightText: 2025 Ladyada for Adafruit Industries
//
// SPDX-License-Identifier: MIT

/*!
*
* Basic test example for the Adafruit PCM5122
*
* Written by Limor 'ladyada' Fried with assistance from Claude Code
* for Adafruit Industries.
*
* MIT license, all text here must be included in any redistribution.
*/

#include <Adafruit_PCM51xx.h>
#include <I2S.h>
#include <math.h>

Adafruit_PCM51xx pcm;

#define pBCLK D9 // BITCLOCK - I2S clock
#define pWS D10 // LRCLOCK - Word select
#define pDOUT D11 // DATA - I2S data

// Create I2S port
I2S i2s(OUTPUT);

const int frequency = 440; // frequency of square wave in Hz
const int amplitude = 500; // amplitude of square wave
const int sampleRate = 16000; // 16 KHz is a good quality

const int halfWavelength = (sampleRate / frequency); // half wavelength of square wave

int16_t sample = amplitude; // current sample value
int count = 0;

void setup() {
Serial.begin(115200);
while (!Serial) delay(10);

Serial.println(F("Adafruit PCM51xx Test"));

// I2C mode (default)
if (!pcm.begin()) {
Serial.println(F("Could not find PCM51xx, check wiring!"));
while (1) delay(10);
}

// Hardware SPI mode (uncomment to use)
// if (!pcm.begin(10, &SPI)) { // CS pin 10
// Serial.println(F("Could not find PCM51xx over SPI, check wiring!"));
// while (1) delay(10);
// }

// Software SPI mode (uncomment to use)
// if (!pcm.begin(10, 11, 12, 13)) { // CS, MOSI, MISO, SCLK
// Serial.println(F("Could not find PCM51xx over software SPI, check wiring!"));
// while (1) delay(10);
// }

Serial.println(F("PCM51xx initialized successfully!"));

// Set I2S format to I2S
Serial.println(F("Setting I2S format"));
pcm.setI2SFormat(PCM51XX_I2S_FORMAT_I2S);

// Read and display current format
pcm51xx_i2s_format_t format = pcm.getI2SFormat();
Serial.print(F("Current I2S format: "));
switch (format) {
case PCM51XX_I2S_FORMAT_I2S:
Serial.println(F("I2S"));
break;
case PCM51XX_I2S_FORMAT_TDM:
Serial.println(F("TDM/DSP"));
break;
case PCM51XX_I2S_FORMAT_RTJ:
Serial.println(F("Right Justified"));
break;
case PCM51XX_I2S_FORMAT_LTJ:
Serial.println(F("Left Justified"));
break;
default:
Serial.println(F("Unknown"));
break;
}

// Set I2S word length to 32-bit
Serial.println(F("Setting I2S word length"));
pcm.setI2SSize(PCM51XX_I2S_SIZE_16BIT);

// Read and display current word length
pcm51xx_i2s_size_t size = pcm.getI2SSize();
Serial.print(F("Current I2S word length: "));
switch (size) {
case PCM51XX_I2S_SIZE_16BIT:
Serial.println(F("16 bits"));
break;
case PCM51XX_I2S_SIZE_20BIT:
Serial.println(F("20 bits"));
break;
case PCM51XX_I2S_SIZE_24BIT:
Serial.println(F("24 bits"));
break;
case PCM51XX_I2S_SIZE_32BIT:
Serial.println(F("32 bits"));
break;
default:
Serial.println(F("Unknown"));
break;
}

// Set error detection bits
if (!pcm.ignoreFSDetect(true) || !pcm.ignoreBCKDetect(true) || !pcm.ignoreSCKDetect(true) ||
!pcm.ignoreClockHalt(true) || !pcm.ignoreClockMissing(true) || !pcm.disableClockAutoset(false) ||
!pcm.ignorePLLUnlock(true)) {
Serial.println(F("Error detection failed to configure"));
}

// Enable PLL
Serial.println(F("Enabling PLL"));
pcm.enablePLL(true);

// Check PLL status
bool pllEnabled = pcm.isPLLEnabled();
Serial.print(F("PLL enabled: "));
Serial.println(pllEnabled ? F("Yes") : F("No"));

// Set PLL reference to BCK
Serial.println(F("Setting PLL reference"));
pcm.setPLLReference(PCM51XX_PLL_REF_BCK);

// Read and display current PLL reference
pcm51xx_pll_ref_t pllRef = pcm.getPLLReference();
Serial.print(F("Current PLL reference: "));
switch (pllRef) {
case PCM51XX_PLL_REF_SCK:
Serial.println(F("SCK"));
break;
case PCM51XX_PLL_REF_BCK:
Serial.println(F("BCK"));
break;
case PCM51XX_PLL_REF_GPIO:
Serial.println(F("GPIO"));
break;
default:
Serial.println(F("Unknown"));
break;
}

// Set DAC clock source to PLL
Serial.println(F("Setting DAC source"));
pcm.setDACSource(PCM51XX_DAC_CLK_PLL);

// Read and display current DAC source
pcm51xx_dac_clk_src_t dacSource = pcm.getDACSource();
Serial.print(F("Current DAC source: "));
switch (dacSource) {
case PCM51XX_DAC_CLK_MASTER:
Serial.println(F("Master clock (auto-select)"));
break;
case PCM51XX_DAC_CLK_PLL:
Serial.println(F("PLL clock"));
break;
case PCM51XX_DAC_CLK_SCK:
Serial.println(F("SCK clock"));
break;
case PCM51XX_DAC_CLK_BCK:
Serial.println(F("BCK clock"));
break;
default:
Serial.println(F("Unknown"));
break;
}

// Test auto mute (default turn off)
Serial.println(F("Setting auto mute"));
pcm.setAutoMute(false);

// Read and display current auto mute status
bool autoMuteEnabled = pcm.getAutoMute();
Serial.print(F("Auto mute: "));
Serial.println(autoMuteEnabled ? F("Enabled") : F("Disabled"));

// Test mute (default do not mute)
Serial.println(F("Setting mute"));
pcm.mute(false);

// Read and display current mute status
bool muteEnabled = pcm.isMuted();
Serial.print(F("Mute: "));
Serial.println(muteEnabled ? F("Enabled") : F("Disabled"));

// Check DSP boot status and power state
Serial.print(F("DSP boot done: "));
Serial.println(pcm.getDSPBootDone() ? F("Yes") : F("No"));

pcm51xx_power_state_t powerState = pcm.getPowerState();
Serial.print(F("Power state: "));
switch (powerState) {
case PCM51XX_POWER_POWERDOWN:
Serial.println(F("Powerdown"));
break;
case PCM51XX_POWER_WAIT_CP_VALID:
Serial.println(F("Wait for CP voltage valid"));
break;
case PCM51XX_POWER_CALIBRATION_1:
case PCM51XX_POWER_CALIBRATION_2:
Serial.println(F("Calibration"));
break;
case PCM51XX_POWER_VOLUME_RAMP_UP:
Serial.println(F("Volume ramp up"));
break;
case PCM51XX_POWER_RUN_PLAYING:
Serial.println(F("Run (Playing)"));
break;
case PCM51XX_POWER_LINE_SHORT:
Serial.println(F("Line output short / Low impedance"));
break;
case PCM51XX_POWER_VOLUME_RAMP_DOWN:
Serial.println(F("Volume ramp down"));
break;
case PCM51XX_POWER_STANDBY:
Serial.println(F("Standby"));
break;
default:
Serial.println(F("Unknown"));
break;
}

// Check PLL lock status
bool pllLocked = pcm.isPLLLocked();
Serial.print(F("PLL locked: "));
Serial.println(pllLocked ? F("Yes") : F("No"));

// Set volume to -6dB on both channels
Serial.println(F("Setting volume"));
pcm.setVolumeDB(-6.0, -6.0);

// Read and display current volume
float leftVol, rightVol;
pcm.getVolumeDB(&leftVol, &rightVol);
Serial.print(F("Current volume - Left: "));
Serial.print(leftVol, 1);
Serial.print(F("dB, Right: "));
Serial.print(rightVol, 1);
Serial.println(F("dB"));

// Initialize I2S peripheral
Serial.println("Initializing I2S...");
i2s.setBCLK(pBCLK);
i2s.setDATA(pDOUT);
i2s.setBitsPerSample(16);

// Start I2S at the sample rate
if (!i2s.begin(sampleRate)) {
Serial.println("Failed to initialize I2S!");
}

}

void loop() {
if (count % halfWavelength == 0) {
// invert the sample every half wavelength count multiple to generate square wave
sample = -1 * sample;
}

// write the same sample twice, once for left and once for the right channel
i2s.write(sample);
i2s.write(sample);

// increment the counter for the next sample
count++;
}
2 changes: 1 addition & 1 deletion library.deps
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depends=Adafruit SSD1305, Adafruit ILI9341, Adafruit BusIO, SD, Adafruit NeoPixel, Adafruit VS1053 Library, Adafruit BluefruitLE nRF51, Adafruit seesaw Library, Ethernet, Stepper, Adafruit IO Arduino, FastLED@3.10.1, Adafruit LiquidCrystal, Adafruit SoftServo, TinyWireM, Adafruit AM radio library, WaveHC, Adafruit LED Backpack Library, MAX31850 OneWire, Adafruit VC0706 Serial Camera Library, RTClib, Adafruit SleepyDog Library, Adafruit Thermal Printer Library, Adafruit Zero I2S Library, Adafruit EPD, Adafruit SSD1351 library, Adafruit FONA Library, Adafruit Motor Shield V2 Library, Adafruit NeoMatrix, Adafruit Soundboard library, Adafruit Circuit Playground, ArduinoJson, Adafruit TCS34725, Adafruit Pixie, Adafruit GPS Library, TinyGPS, WiFi101, Adafruit DotStar, Adafruit Si7021 Library, Adafruit WS2801 Library, Mouse, Keyboard, Time, IRremote, Adafruit LSM9DS0 Library, Adafruit Arcada Library, MIDIUSB, PubSubClient, Adafruit LIS2MDL, Adafruit NeoPXL8, Adafruit MCP23017 Arduino Library, Adafruit MLX90640, LiquidCrystal, Adafruit NeoTrellis M4 Library, RGB matrix Panel, Adafruit MLX90614 Library, Adafruit RGB LCD Shield Library, MAX6675 library, Adafruit MP3, Adafruit Keypad, Adafruit Arcada GifDecoder, Keypad, Neosegment, Encoder, Adafruit TiCoServo, Adafruit Trellis Library, FauxmoESP, Adafruit LSM303 Accel, Adafruit LSM303DLH Mag, Adafruit LSM303DLHC, CapacitiveSensor, Adafruit Zero PDM Library, Adafruit DMA neopixel library, elapsedMillis, DST RTC, Adafruit SHARP Memory Display, Adafruit SPIFlash, BSEC Software Library, WiiChuck, Adafruit DPS310, Adafruit AHTX0, RotaryEncoder, Adafruit MCP9808 Library, LSM303, Adafruit Protomatter, Adafruit IS31FL3741 Library, Sensirion I2C SCD4x, Adafruit TestBed, Bounce2, Adafruit AHRS, Adafruit DRV2605 Library, STM32duino VL53L4CD, PicoDVI - Adafruit Fork, Adafruit MMA8451 Library, Adafruit TSC2007, GFX Library for Arduino, Adafruit PyCamera Library, Adafruit ADG72x, Adafruit BNO055, Adafruit SHT4x Library, Adafruit VCNL4200 Library, Adafruit GC9A01A, Adafruit DVI HSTX, Adafruit TLV320 I2S
depends=Adafruit SSD1305, Adafruit ILI9341, Adafruit BusIO, SD, Adafruit NeoPixel, Adafruit VS1053 Library, Adafruit BluefruitLE nRF51, Adafruit seesaw Library, Ethernet, Stepper, Adafruit IO Arduino, FastLED@3.10.1, Adafruit LiquidCrystal, Adafruit SoftServo, TinyWireM, Adafruit AM radio library, WaveHC, Adafruit LED Backpack Library, MAX31850 OneWire, Adafruit VC0706 Serial Camera Library, RTClib, Adafruit SleepyDog Library, Adafruit Thermal Printer Library, Adafruit Zero I2S Library, Adafruit EPD, Adafruit SSD1351 library, Adafruit FONA Library, Adafruit Motor Shield V2 Library, Adafruit NeoMatrix, Adafruit Soundboard library, Adafruit Circuit Playground, ArduinoJson, Adafruit TCS34725, Adafruit Pixie, Adafruit GPS Library, TinyGPS, WiFi101, Adafruit DotStar, Adafruit Si7021 Library, Adafruit WS2801 Library, Mouse, Keyboard, Time, IRremote, Adafruit LSM9DS0 Library, Adafruit Arcada Library, MIDIUSB, PubSubClient, Adafruit LIS2MDL, Adafruit NeoPXL8, Adafruit MCP23017 Arduino Library, Adafruit MLX90640, LiquidCrystal, Adafruit NeoTrellis M4 Library, RGB matrix Panel, Adafruit MLX90614 Library, Adafruit RGB LCD Shield Library, MAX6675 library, Adafruit MP3, Adafruit Keypad, Adafruit Arcada GifDecoder, Keypad, Neosegment, Encoder, Adafruit TiCoServo, Adafruit Trellis Library, FauxmoESP, Adafruit LSM303 Accel, Adafruit LSM303DLH Mag, Adafruit LSM303DLHC, CapacitiveSensor, Adafruit Zero PDM Library, Adafruit DMA neopixel library, elapsedMillis, DST RTC, Adafruit SHARP Memory Display, Adafruit SPIFlash, BSEC Software Library, WiiChuck, Adafruit DPS310, Adafruit AHTX0, RotaryEncoder, Adafruit MCP9808 Library, LSM303, Adafruit Protomatter, Adafruit IS31FL3741 Library, Sensirion I2C SCD4x, Adafruit TestBed, Bounce2, Adafruit AHRS, Adafruit DRV2605 Library, STM32duino VL53L4CD, PicoDVI - Adafruit Fork, Adafruit MMA8451 Library, Adafruit TSC2007, GFX Library for Arduino, Adafruit PyCamera Library, Adafruit ADG72x, Adafruit BNO055, Adafruit SHT4x Library, Adafruit VCNL4200 Library, Adafruit GC9A01A, Adafruit DVI HSTX, Adafruit TLV320 I2S, Adafruit PCM51xx
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