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

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+
+/**
+ * @file output.ino
+ * @author Phil Schatzmann
+ * @brief  Demo how to use the microphone.
+ * @version 0.1
+ * @date 2024-11-03
+ *
+ * The microphone seems to be attached to 2 different i2s ports. In addition to the
+ * ES8311, the ES7243 is also started. 
+ * The I2S pins can be selected via cfg.i2s_function: CODEC uses the ES8311 I2S pins 
+ * and CODEC_ADC uses the ES7243 I2S pins; By default the CODEC value is used.
+ *
+ * Only CODEC_ADC will give a proper microphone input! 
+ * 
+ * @copyright Copyright (c) 2022
+ */
+
+
+#include "AudioTools.h"
+#include "AudioTools/AudioLibs/AudioBoardStream.h"
+
+AudioInfo info(44100, 2, 16);
+AudioBoardStream i2s(LyratMini); // Access I2S as stream
+CsvOutput<int16_t> csvOutput(Serial);
+StreamCopy copier(csvOutput, i2s); // copy i2s to csvOutput
+
+// Arduino Setup
+void setup(void) {
+    Serial.begin(115200);
+    // Display details what is going on
+    AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
+    AudioDriverLogger.begin(Serial, AudioDriverLogLevel::Info);
+    
+    auto cfg = i2s.defaultConfig(RX_MODE);
+    cfg.copyFrom(info);
+    // cfg.i2s_function = PinFunction::CODEC_ADC;  // determined automatically
+    // cfg.i2s_port_no = 0; // or 1 if 0 is already in use
+    i2s.begin(cfg);
+
+    // make sure that we have the correct number of channels set up
+    csvOutput.begin(info);
+
+}
+
+// Arduino loop - copy data
+void loop() {
+    copier.copy();
+}