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libraries/audio-tools/examples/examples-custom-boards/lyrat-mini/output/output.ino

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+/**
+ * @file output.ino
+ * @author Phil Schatzmann
+ * @brief  Demo to output audio on a lyrat-mini board: with headphone detection 
+ * active to switch the power amplifier on and off.
+ * I2S is used and the ES8311 is initialized via the driver library.
+ * @version 0.1
+ * @date 2024-11-03
+ *
+ * @copyright Copyright (c) 2022
+ */
+
+#include "AudioTools.h"
+#include "AudioTools/AudioLibs/AudioBoardStream.h"
+
+AudioInfo info(44100, 2, 16);
+SineWaveGenerator<int16_t> sineWave(32000);     // subclass of SoundGenerator with max amplitude of 32000
+GeneratedSoundStream<int16_t> sound(sineWave);  // Stream generated from sine wave
+AudioBoardStream out(LyratMini);
+StreamCopy copier(out, sound);  // copies sound into i2s
+
+// Arduino Setup
+void setup(void) {
+  // Open Serial
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
+
+  // start I2S
+  Serial.println("starting I2S...");
+  auto config = out.defaultConfig(TX_MODE);
+  config.copyFrom(info);
+  // cfg.i2s_function = PinFunction::CODEC;  // determined automatically
+  // cfg.i2s_port_no = 0; // or 1 if 0 is already in use
+  out.begin(config);
+
+  // additinal settings
+  out.setVolume(0.5);
+  out.addHeadphoneDetectionAction();
+
+  // start sine wave
+  sineWave.begin(info, N_B4);
+  Serial.println("started...");
+}
+
+void loop() {
+  copier.copy();
+  out.processActions();
+}