snapshot

libraries/audio-tools/examples/examples-stream/streams-generator-pwm/streams-generator-pwm.ino

@@ -0,0 +1,41 @@
+/**
+ * @file streams-generator-pwm.ino
+ * @author Phil Schatzmann
+ * @brief see https://github.com/pschatzmann/arduino-audio-tools/blob/main/examples/examples-stream/streams-generator-pwm/README.md 
+ * @author Phil Schatzmann
+ * @copyright GPLv3
+ */
+ 
+#include "AudioTools.h"
+
+AudioInfo info(8000, 1, 16);
+SineWaveGenerator<int16_t> sineWave(32000); // subclass of SoundGenerator with max amplitude of 32000
+GeneratedSoundStream<int16_t> sound(sineWave);  // Stream generated from sine wave
+PWMAudioOutput pwm;                  
+StreamCopy copier(pwm, sound);    // copy in to out
+
+
+void setup() {
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);  
+
+  // setup sine wave
+  sineWave.begin(info, N_B4);
+
+  // setup PWM output
+  auto config = pwm.defaultConfig();
+  config.copyFrom(info);
+  //config.resolution = 8;  // must be between 8 and 11 -> drives pwm frequency (8 is default)
+  // alternative 1
+  //config.start_pin = 3;
+  // alternative 2
+  //int pins[] = {3};
+  // alternative 3
+  //Pins pins = {3};
+  //config.setPins(pins); 
+  pwm.begin(config);
+}
+
+void loop(){
+  copier.copy();
+}