initial commit

2026-09-25 10:48:51 +10:00
commit b90beea8ae
1020 changed files with 131665 additions and 0 deletions
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+/*
+ * Adafruit SampleRateMod.pde example modified to use WaveHC.
+ *
+ * Play files with sample rate controlled by voltage on analog pin zero.
+ */
+#include <WaveHC.h>
+#include <WaveUtil.h>
+
+SdReader card;    // This object holds the information for the card
+FatVolume vol;    // This holds the information for the partition on the card
+FatReader root;   // This holds the information for the volumes root directory
+FatReader file;   // This object represent the WAV file
+WaveHC wave;      // This is the only wave (audio) object, since we will only play one at a time
+
+/*
+ * Define macro to put error messages in flash memory
+ */
+#define error(msg) error_P(PSTR(msg))
+
+//////////////////////////////////// SETUP
+void setup() {
+  Serial.begin(9600);
+  Serial.println("Wave test!");
+
+  // try card.init(true) if errors occur on V1.0 Wave Shield
+  if (!card.init()) {
+    error("Card init. failed!");
+  }
+  // enable optimize read - some cards may timeout
+  card.partialBlockRead(true);
+  
+  if (!vol.init(card)) {
+    error("No partition!");
+  }
+  if (!root.openRoot(vol)) {
+    error("Couldn't open root");
+  }
+  putstring_nl("Files found:");
+  root.ls();
+}
+
+// forward declarition
+void playcomplete(FatReader &file);
+
+//////////////////////////////////// LOOP
+void loop() { 
+  uint8_t i, r;
+  char c, name[15];
+  dir_t dir;
+
+  root.rewind();
+  // scroll through the files in the directory
+  while (root.readDir(dir) > 0) { 
+    // only play .WAV files
+    if (strncmp_P((char *)&dir.name[8],PSTR("WAV"), 3)) continue;
+    
+    if (!file.open(vol, dir)){
+      putstring("Can't open ");
+      printEntryName(dir);
+      Serial.println();
+      continue;
+    }
+    putstring("\n\rPlaying "); 
+    printEntryName(dir);
+    Serial.println();
+    playcomplete(file);
+    file.close();    
+  }
+}
+/////////////////////////////////// HELPERS
+/*
+ * print error message and halt
+ */
+void error_P(const char *str) {
+  PgmPrint("Error: ");
+  SerialPrint_P(str);
+  sdErrorCheck();
+  while(1);
+}
+/*
+ * print error message and halt if SD I/O error, great for debugging!
+ */
+void sdErrorCheck(void) {
+  if (!card.errorCode()) return;
+  PgmPrint("\r\nSD I/O error: ");
+  Serial.print(card.errorCode(), HEX);
+  PgmPrint(", ");
+  Serial.println(card.errorData(), HEX);
+  while(1);
+}
+int16_t lastpotval = 0;
+#define HYSTERESIS 3
+/*
+ * play file with sample rate changes
+ */
+void playcomplete(FatReader &file) {
+  int16_t potval;
+  uint32_t newsamplerate;
+  
+   if (!wave.create(file)) {
+     putstring_nl(" Not a valid WAV"); return;
+   }
+   // ok time to play!
+   wave.play();
+   
+  while (wave.isplaying) {
+     potval = analogRead(0);
+     if ( ((potval - lastpotval) > HYSTERESIS) || ((lastpotval - potval) > HYSTERESIS)) {
+         putstring("pot = ");
+         Serial.println(potval, DEC); 
+         putstring("tickspersam = ");
+         Serial.print(wave.dwSamplesPerSec, DEC);
+         putstring(" -> ");
+         newsamplerate = wave.dwSamplesPerSec;
+         newsamplerate *= potval;
+         newsamplerate /= 512;   // we want to 'split' between sped up and slowed down.
+        if (newsamplerate > 24000) {
+          newsamplerate = 24000;  
+        }
+        if (newsamplerate < 1000) {
+          newsamplerate = 1000;  
+        }        
+        wave.setSampleRate(newsamplerate);
+        
+        Serial.println(newsamplerate, DEC);
+        lastpotval = potval;
+     }
+     delay(100);
+   }
+   sdErrorCheck();
+}