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79 lines
2.2 KiB
79 lines
2.2 KiB
2 years ago
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// Plays a RAW (16-bit signed) PCM audio file at slower or faster rate
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// this example requires an uSD-card inserted to teensy 3.6 with a file called DEMO.RAW
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#include <Arduino.h>
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#include <Audio.h>
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#include <SerialFlash.h>
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#include <TeensyVariablePlayback.h>
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#define CSPIN 6
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SerialFlashChip myfs;
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// GUItool: begin automatically generated code
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AudioPlaySerialFlashResmp playSerialFlash1(myfs); //xy=324,457
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AudioOutputI2S i2s2; //xy=840.8571472167969,445.5714416503906
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AudioConnection patchCord1(playSerialFlash1, 0, i2s2, 0);
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AudioConnection patchCord2(playSerialFlash1, 0, i2s2, 1);
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AudioControlSGTL5000 audioShield;
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// GUItool: end automatically generated code
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#define A14 10
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const char* _filename = "DEMO.RAW";
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const int analogInPin = A14;
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unsigned long lastSamplePlayed = 0;
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uint32_t diskSize;
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double getPlaybackRate(int16_t analog) { //analog: 0..1023
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return (analog - 512.0) / 512.0;
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}
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void setup() {
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analogReference(0);
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pinMode(analogInPin, INPUT_DISABLE); // i.e. Analog
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if (!SerialFlash.begin(CSPIN)) {
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while (1) {
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Serial.println(F("Unable to access SPI Flash chip"));
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delay(1000);
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}
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}
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Serial.println("SerialFlash initialized.");
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audioShield.enable();
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audioShield.volume(0.5);
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playSerialFlash1.enableInterpolation(true);
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int newsensorValue = analogRead(analogInPin);
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playSerialFlash1.setPlaybackRate(getPlaybackRate(newsensorValue));
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AudioMemory(24);
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}
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void loop() {
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int newsensorValue = analogRead(analogInPin);
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playSerialFlash1.setPlaybackRate(getPlaybackRate(newsensorValue));
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unsigned currentMillis = millis();
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if (currentMillis > lastSamplePlayed + 500) {
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if (!playSerialFlash1.isPlaying()) {
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playSerialFlash1.playRaw(_filename, 1);
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lastSamplePlayed = currentMillis;
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Serial.print("Memory: ");
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Serial.print(AudioMemoryUsage());
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Serial.print(",");
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Serial.print(AudioMemoryUsageMax());
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Serial.println();
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}
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}
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delay(10);
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}
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namespace std {
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void __throw_bad_function_call() {}
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void __throw_length_error(char const*) {}
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}
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