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