98 lines
2.8 KiB
C++
98 lines
2.8 KiB
C++
// Random HAL demo; adapted from PiSpeak sketch. When button
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// on A0 is pressed, plays a random WAV file from a list.
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#include <WaveHC.h>
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#include <WaveUtil.h>
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// REPLACE THESE WITH YOUR ACTUAL WAVE FILE NAMES:
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// These should be at the root level, not in a folder.
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static const char PROGMEM
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file00[] = "0.wav",
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file01[] = "1.wav",
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file02[] = "2.wav",
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file03[] = "3.wav",
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file04[] = "4.wav",
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file05[] = "5.wav",
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file06[] = "6.wav",
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file07[] = "7.wav",
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file08[] = "8.wav",
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file09[] = "9.wav";
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// If adding files above, include corresponding items here:
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static const char * const filename[] PROGMEM = {
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file00, file01, file02, file03, file04,
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file05, file06, file07, file08, file09 };
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// Sorry for the sillyness, but this is how PROGMEM string
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// arrays are handled.
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#define error(msg) error_P(PSTR(msg))
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SdReader card;
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FatVolume vol;
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FatReader root;
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FatReader file;
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WaveHC wave;
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uint8_t debounce = 0, // Button debounce counter
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prev = 255; // Index of last sound played
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void setup() {
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Serial.begin(9600);
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if(!card.init()) error("Card init. failed!");
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if(!vol.init(card)) error("No partition!");
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if(!root.openRoot(vol)) error("Couldn't open dir");
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// PgmPrintln("Files found:");
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// root.ls();
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digitalWrite(A0, HIGH); // Enable pullup on button
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randomSeed(analogRead(A1)); // Randomize first sound
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}
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void loop() {
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if(digitalRead(A0) == HIGH) { // Button not pressed
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debounce = 0; // Reset debounce counter
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return; // and nothing else
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}
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if(++debounce >= 20) { // Debounced button press
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uint8_t n;
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char name[20];
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do { // Choose a random file...
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n = random(sizeof(filename) / sizeof(filename[0]));
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} while(n == prev); // ...but don't repeat last one
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prev = n; // Save file #
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debounce = 0; // Reset debounce counter
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strcpy_P(name, (char *)pgm_read_word(&filename[n])); // PROGMEM->RAM
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if(wave.isplaying) wave.stop(); // Stop WAV if playing
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if(!file.open(root, name)) {
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PgmPrint("Couldn't open file ");
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Serial.print(name);
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return;
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}
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if(!wave.create(file)) {
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PgmPrintln("Not a valid WAV");
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return;
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}
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wave.play(); // Start playing
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while(wave.isplaying); // Wait for completion
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sdErrorCheck(); // Check for error during play
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while(digitalRead(A0) == LOW); // Wait for button release
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}
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}
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void error_P(const char *str) {
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PgmPrint("Error: ");
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SerialPrint_P(str);
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sdErrorCheck();
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for(;;);
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}
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void sdErrorCheck(void) {
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if(!card.errorCode()) return;
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PgmPrint("\r\nSD I/O error: ");
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Serial.print(card.errorCode(), HEX);
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PgmPrint(", ");
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Serial.println(card.errorData(), HEX);
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for(;;);
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}
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