Diff: soundboard/main.cpp

Revision:

0:6a73d3dc037e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/soundboard/main.cpp	Mon Jul 28 20:29:28 2014 +0000
@@ -0,0 +1,82 @@
+// Soundboard that plays 1 of 4 .wav files stored on the SD card based on 1 of
+// 4 buttons pressed
+
+#include "mbed.h"
+#include "wave_player.h"
+#include "SDFileSystem.h"
+
+// .wav files to play
+char *filenames[4] = {  "/sd/good_morning.wav", \
+                        "/sd/questions.wav", \
+                        "/sd/lack_discipline.wav", \
+                        "/sd/stop_whining.wav"};
+
+// Define buttons
+DigitalIn button_1(p11);
+DigitalIn button_2(p12);
+DigitalIn button_3(p13);
+DigitalIn button_4(p14);
+
+// USB serial (tx, rx)
+Serial pc(USBTX, USBRX);
+
+// SD card
+SDFileSystem sd(p5, p6, p7, p8, "sd");
+
+// Audio out (DAC)
+AnalogOut       DACout(p18);
+wave_player     waver(&DACout);
+
+// Play a .wav file
+int playSound(int file_num) {
+    
+    FILE *file;
+    
+    // Open sound file for reading
+    file = fopen(filenames[file_num], "r");
+    if ( file == NULL ) {
+        error("ERROR: Could not open file for reading!\n");
+        return -1;
+    }
+    
+    // Play the sound file
+    pc.printf("Playing sound clip %i\r\n", (file_num + 1));
+    waver.play(file);
+    
+    // Reset to beginning of file and close it
+    fseek(file, 0, SEEK_SET);
+    fclose(file);
+    
+    return 0;
+}
+
+int main() {
+
+    // Use internal pull-up resistors
+    button_1.mode(PullUp);
+    button_2.mode(PullUp);
+    button_3.mode(PullUp);
+    button_4.mode(PullUp);
+    
+    pc.printf("\r\nHardware Soundboard\r\n");
+    
+    while(1) {
+        
+        // Figure out which button was pressed and play that file
+        if ( button_1 == 0 ) {
+            playSound(0);
+        }
+        if ( button_2 == 0 ) {
+            playSound(1);
+        }
+        if ( button_3 == 0 ) {
+            playSound(2);
+        }
+        if ( button_4 == 0 ) {
+            playSound(3);
+        }
+        
+        // Wait 10ms before sampling the buttons again
+        wait(0.01);
+    }
+} 
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