mbed Starter Kit / mbed Starter Kit Demo Programs

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soundboard/main.cpp@0:6a73d3dc037e, 2014-07-28 (annotated)

Committer:
ShawnHymel
Date:
Mon Jul 28 20:29:28 2014 +0000
Revision:
0:6a73d3dc037e
Added main.cpp files from each of the demo programs. Libraries are not included.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ShawnHymel 0:6a73d3dc037e 1 // Soundboard that plays 1 of 4 .wav files stored on the SD card based on 1 of
ShawnHymel 0:6a73d3dc037e 2 // 4 buttons pressed
ShawnHymel 0:6a73d3dc037e 3
ShawnHymel 0:6a73d3dc037e 4 #include "mbed.h"
ShawnHymel 0:6a73d3dc037e 5 #include "wave_player.h"
ShawnHymel 0:6a73d3dc037e 6 #include "SDFileSystem.h"
ShawnHymel 0:6a73d3dc037e 7
ShawnHymel 0:6a73d3dc037e 8 // .wav files to play
ShawnHymel 0:6a73d3dc037e 9 char *filenames[4] = { "/sd/good_morning.wav", \
ShawnHymel 0:6a73d3dc037e 10 "/sd/questions.wav", \
ShawnHymel 0:6a73d3dc037e 11 "/sd/lack_discipline.wav", \
ShawnHymel 0:6a73d3dc037e 12 "/sd/stop_whining.wav"};
ShawnHymel 0:6a73d3dc037e 13
ShawnHymel 0:6a73d3dc037e 14 // Define buttons
ShawnHymel 0:6a73d3dc037e 15 DigitalIn button_1(p11);
ShawnHymel 0:6a73d3dc037e 16 DigitalIn button_2(p12);
ShawnHymel 0:6a73d3dc037e 17 DigitalIn button_3(p13);
ShawnHymel 0:6a73d3dc037e 18 DigitalIn button_4(p14);
ShawnHymel 0:6a73d3dc037e 19
ShawnHymel 0:6a73d3dc037e 20 // USB serial (tx, rx)
ShawnHymel 0:6a73d3dc037e 21 Serial pc(USBTX, USBRX);
ShawnHymel 0:6a73d3dc037e 22
ShawnHymel 0:6a73d3dc037e 23 // SD card
ShawnHymel 0:6a73d3dc037e 24 SDFileSystem sd(p5, p6, p7, p8, "sd");
ShawnHymel 0:6a73d3dc037e 25
ShawnHymel 0:6a73d3dc037e 26 // Audio out (DAC)
ShawnHymel 0:6a73d3dc037e 27 AnalogOut DACout(p18);
ShawnHymel 0:6a73d3dc037e 28 wave_player waver(&DACout);
ShawnHymel 0:6a73d3dc037e 29
ShawnHymel 0:6a73d3dc037e 30 // Play a .wav file
ShawnHymel 0:6a73d3dc037e 31 int playSound(int file_num) {
ShawnHymel 0:6a73d3dc037e 32
ShawnHymel 0:6a73d3dc037e 33 FILE *file;
ShawnHymel 0:6a73d3dc037e 34
ShawnHymel 0:6a73d3dc037e 35 // Open sound file for reading
ShawnHymel 0:6a73d3dc037e 36 file = fopen(filenames[file_num], "r");
ShawnHymel 0:6a73d3dc037e 37 if ( file == NULL ) {
ShawnHymel 0:6a73d3dc037e 38 error("ERROR: Could not open file for reading!\n");
ShawnHymel 0:6a73d3dc037e 39 return -1;
ShawnHymel 0:6a73d3dc037e 40 }
ShawnHymel 0:6a73d3dc037e 41
ShawnHymel 0:6a73d3dc037e 42 // Play the sound file
ShawnHymel 0:6a73d3dc037e 43 pc.printf("Playing sound clip %i\r\n", (file_num + 1));
ShawnHymel 0:6a73d3dc037e 44 waver.play(file);
ShawnHymel 0:6a73d3dc037e 45
ShawnHymel 0:6a73d3dc037e 46 // Reset to beginning of file and close it
ShawnHymel 0:6a73d3dc037e 47 fseek(file, 0, SEEK_SET);
ShawnHymel 0:6a73d3dc037e 48 fclose(file);
ShawnHymel 0:6a73d3dc037e 49
ShawnHymel 0:6a73d3dc037e 50 return 0;
ShawnHymel 0:6a73d3dc037e 51 }
ShawnHymel 0:6a73d3dc037e 52
ShawnHymel 0:6a73d3dc037e 53 int main() {
ShawnHymel 0:6a73d3dc037e 54
ShawnHymel 0:6a73d3dc037e 55 // Use internal pull-up resistors
ShawnHymel 0:6a73d3dc037e 56 button_1.mode(PullUp);
ShawnHymel 0:6a73d3dc037e 57 button_2.mode(PullUp);
ShawnHymel 0:6a73d3dc037e 58 button_3.mode(PullUp);
ShawnHymel 0:6a73d3dc037e 59 button_4.mode(PullUp);
ShawnHymel 0:6a73d3dc037e 60
ShawnHymel 0:6a73d3dc037e 61 pc.printf("\r\nHardware Soundboard\r\n");
ShawnHymel 0:6a73d3dc037e 62
ShawnHymel 0:6a73d3dc037e 63 while(1) {
ShawnHymel 0:6a73d3dc037e 64
ShawnHymel 0:6a73d3dc037e 65 // Figure out which button was pressed and play that file
ShawnHymel 0:6a73d3dc037e 66 if ( button_1 == 0 ) {
ShawnHymel 0:6a73d3dc037e 67 playSound(0);
ShawnHymel 0:6a73d3dc037e 68 }
ShawnHymel 0:6a73d3dc037e 69 if ( button_2 == 0 ) {
ShawnHymel 0:6a73d3dc037e 70 playSound(1);
ShawnHymel 0:6a73d3dc037e 71 }
ShawnHymel 0:6a73d3dc037e 72 if ( button_3 == 0 ) {
ShawnHymel 0:6a73d3dc037e 73 playSound(2);
ShawnHymel 0:6a73d3dc037e 74 }
ShawnHymel 0:6a73d3dc037e 75 if ( button_4 == 0 ) {
ShawnHymel 0:6a73d3dc037e 76 playSound(3);
ShawnHymel 0:6a73d3dc037e 77 }
ShawnHymel 0:6a73d3dc037e 78
ShawnHymel 0:6a73d3dc037e 79 // Wait 10ms before sampling the buttons again
ShawnHymel 0:6a73d3dc037e 80 wait(0.01);
ShawnHymel 0:6a73d3dc037e 81 }
ShawnHymel 0:6a73d3dc037e 82 }