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TLV320_Tone_Arduino: add headphone support and Pico 2W hardware reset #3241

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Merged
BlitzCityDIY merged 2 commits into from
May 13, 2026
Merged

TLV320_Tone_Arduino: add headphone support and Pico 2W hardware reset #3241

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0837f2d
TLV320_Tone_Arduino: add headphone support and Pico 2W (RP2350) hardw…
mikeysklar May 13, 2026
03850df
TLV320_Tone_Arduino: uncomment headphone output, restore stock volume
mikeysklar May 13, 2026
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24 changes: 20 additions & 4 deletions TLV320DAC3100_Examples/TLV320_Tone_Arduino/TLV320_Tone_Arduino.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -10,9 +10,10 @@

Adafruit_TLV320DAC3100 codec; // Create codec object

#define pBCLK D9 // BITCLOCK - I2S clock
#define pWS D10 // LRCLOCK - Word select
#define pDOUT D11 // DATA - I2S data
#define pBCLK D9 // BITCLOCK - I2S clock
#define pWS D10 // LRCLOCK - Word select
#define pDOUT D11 // DATA - I2S data
#define pRESET 7 // RST - hardware reset (required for Pico 2W / RP2350)

// Create I2S port
I2S i2s(OUTPUT);
Expand All @@ -31,6 +32,14 @@ void setup() {

while (!Serial) delay(10);
Serial.println("\n\nTLV320DAC3100 Sine Tone Test");

// Hardware reset - required for Pico 2W (RP2350), harmless on Pico (RP2040)
pinMode(pRESET, OUTPUT);
digitalWrite(pRESET, LOW);
delay(100);
digitalWrite(pRESET, HIGH);
delay(100);

// Start I2C communication with codec
Serial.println("Initializing codec...");
if (!codec.begin()) {
Expand Down Expand Up @@ -92,7 +101,7 @@ void setup() {
!codec.setChannelVolume(true, 18)) { // Right DAC +0dB
Serial.println("Failed to configure DAC volume control!");
}


if (!codec.setChannelVolume(false, 12.0) ||
!codec.setChannelVolume(true, 12.0)) {
Expand All @@ -106,6 +115,13 @@ void setup() {
Serial.println("Failed to configure speaker output!");
}

// Headphone output
codec.configureHeadphoneDriver(true, true, TLV320_HP_COMMON_1_35V, false);
codec.setHPLVolume(true, 0);
codec.setHPRVolume(true, 0);
codec.configureHPL_PGA(9, true);
codec.configureHPR_PGA(9, true);

// Initialize I2S peripheral
Serial.println("Initializing I2S...");
i2s.setBCLK(pBCLK);
Expand Down
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