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95 lines
2.9 KiB
95 lines
2.9 KiB
// 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 <LittleFS.h>
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#include <TeensyVariablePlayback.h>
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LittleFS_Program myfs;
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#define PROG_FLASH_SIZE 1024 * 1024 * 1 // Specify size to use of onboard Teensy Program Flash chip
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// GUItool: begin automatically generated code
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AudioPlayLfsResmp playLfsRaw1(myfs); //xy=324,457
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AudioOutputI2S i2s2; //xy=840.8571472167969,445.5714416503906
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AudioConnection patchCord1(playLfsRaw1, 0, i2s2, 0);
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AudioConnection patchCord2(playLfsRaw1, 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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// see if the Flash is present and can be initialized:
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// lets check to see if the T4 is setup for security first
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#if ARDUINO_TEENSY40
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if ((IOMUXC_GPR_GPR11 & 0x100) == 0x100) {
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//if security is active max disk size is 960x1024
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if (PROG_FLASH_SIZE > 960 * 1024) {
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diskSize = 960 * 1024;
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Serial.printf("Security Enables defaulted to %u bytes\n", diskSize);
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} else {
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diskSize = PROG_FLASH_SIZE;
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Serial.printf("Security Not Enabled using %u bytes\n", diskSize);
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}
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}
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#else
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diskSize = PROG_FLASH_SIZE;
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#endif
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// checks that the LittFS program has started with the disk size specified
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if (!myfs.begin(diskSize)) {
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Serial.printf("Error starting %s\n", "PROGRAM FLASH DISK");
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while (1) {
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// Error, so don't do anything more - stay stuck here
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}
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}
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Serial.println("LittleFS initialized.");
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audioShield.enable();
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audioShield.volume(0.5);
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playLfsRaw1.enableInterpolation(true);
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int newsensorValue = analogRead(analogInPin);
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playLfsRaw1.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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playLfsRaw1.setPlaybackRate(getPlaybackRate(newsensorValue));
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unsigned currentMillis = millis();
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if (currentMillis > lastSamplePlayed + 500) {
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if (!playLfsRaw1.isPlaying()) {
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playLfsRaw1.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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} |