Thao Le Minh / Mbed 2 deprecated MusicPlayer_ThaoLeMinh Featured

Music Player

Dependencies:   C12832 PinDetect USBHost mbed wave_player

Fork of musicplayer by Sarthak Jaiswal

main.cpp@0:4b3056d3c684, 2014-03-13 (annotated)

Committer:
sarthakjaiswal
Date:
Thu Mar 13 00:23:46 2014 +0000
Revision:
0:4b3056d3c684
Child:
1:45d8f6557ff8
Debugged version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sarthakjaiswal 0:4b3056d3c684 1 #include "mbed.h"
sarthakjaiswal 0:4b3056d3c684 2 #include "SDFileSystem.h"
sarthakjaiswal 0:4b3056d3c684 3 #include "wave_player.h"
sarthakjaiswal 0:4b3056d3c684 4 #include "TextLCD.h"
sarthakjaiswal 0:4b3056d3c684 5 #include "PinDetect.h"
sarthakjaiswal 0:4b3056d3c684 6 #include "Speaker.h"
sarthakjaiswal 0:4b3056d3c684 7 #include <vector>
sarthakjaiswal 0:4b3056d3c684 8 #include <string>
sarthakjaiswal 0:4b3056d3c684 9
sarthakjaiswal 0:4b3056d3c684 10 DigitalOut myled(LED1);
sarthakjaiswal 0:4b3056d3c684 11 DigitalOut myled2(LED2);
sarthakjaiswal 0:4b3056d3c684 12 DigitalOut myled3(LED3);
sarthakjaiswal 0:4b3056d3c684 13 DigitalOut myled4(LED4);
sarthakjaiswal 0:4b3056d3c684 14
sarthakjaiswal 0:4b3056d3c684 15 using namespace std;
sarthakjaiswal 0:4b3056d3c684 16
sarthakjaiswal 0:4b3056d3c684 17 SDFileSystem sd(p5, p6, p7, p8, "sd"); //SD card
sarthakjaiswal 0:4b3056d3c684 18 TextLCD lcd(p9, p10, p11, p12, p13, p14); // rs, e, d4-d7
sarthakjaiswal 0:4b3056d3c684 19 DigitalIn sdDetect(p17);
sarthakjaiswal 0:4b3056d3c684 20
sarthakjaiswal 0:4b3056d3c684 21 PinDetect pb1(p28); // up shift
sarthakjaiswal 0:4b3056d3c684 22 PinDetect pb2(p29); // down shift
sarthakjaiswal 0:4b3056d3c684 23 PinDetect pb3(p30); // pause
sarthakjaiswal 0:4b3056d3c684 24 PinDetect pb4(p27); // volume or play
sarthakjaiswal 0:4b3056d3c684 25
sarthakjaiswal 0:4b3056d3c684 26
sarthakjaiswal 0:4b3056d3c684 27 AnalogOut DACout(p18);
sarthakjaiswal 0:4b3056d3c684 28 wave_player waver(&DACout);
sarthakjaiswal 0:4b3056d3c684 29 int pos = 0;
sarthakjaiswal 0:4b3056d3c684 30 int xx = -1;
sarthakjaiswal 0:4b3056d3c684 31 int vol = 0;
sarthakjaiswal 0:4b3056d3c684 32 //extern "C" {
sarthakjaiswal 0:4b3056d3c684 33 //int SD_inserted();
sarthakjaiswal 0:4b3056d3c684 34 //}
sarthakjaiswal 0:4b3056d3c684 35 //extern "C" virtual disk_initialize();
sarthakjaiswal 0:4b3056d3c684 36 /*int disk_initialize();
sarthakjaiswal 0:4b3056d3c684 37 }*/
sarthakjaiswal 0:4b3056d3c684 38 bool playing = false;
sarthakjaiswal 0:4b3056d3c684 39 bool old_playing = false;
sarthakjaiswal 0:4b3056d3c684 40 vector<string> filenames; //filenames are stored in a vector string
sarthakjaiswal 0:4b3056d3c684 41 void read_file_names(char *dir)
sarthakjaiswal 0:4b3056d3c684 42 {
sarthakjaiswal 0:4b3056d3c684 43 DIR *dp;
sarthakjaiswal 0:4b3056d3c684 44 struct dirent *dirp;
sarthakjaiswal 0:4b3056d3c684 45 dp = opendir(dir);
sarthakjaiswal 0:4b3056d3c684 46 //read all directory and file names in current directory into filename vector
sarthakjaiswal 0:4b3056d3c684 47 while((dirp = readdir(dp)) != NULL) {
sarthakjaiswal 0:4b3056d3c684 48 filenames.push_back(string(dirp->d_name));
sarthakjaiswal 0:4b3056d3c684 49 }
sarthakjaiswal 0:4b3056d3c684 50 }
sarthakjaiswal 0:4b3056d3c684 51
sarthakjaiswal 0:4b3056d3c684 52 void pb1_hit_callback (void)
sarthakjaiswal 0:4b3056d3c684 53 {
sarthakjaiswal 0:4b3056d3c684 54 int l = filenames.size();
sarthakjaiswal 0:4b3056d3c684 55 if (pos < (l-1)) {
sarthakjaiswal 0:4b3056d3c684 56 pos++;
sarthakjaiswal 0:4b3056d3c684 57 } else if (pos == (l-1)) {
sarthakjaiswal 0:4b3056d3c684 58 pos = 0;
sarthakjaiswal 0:4b3056d3c684 59 }
sarthakjaiswal 0:4b3056d3c684 60 string songname = filenames[pos];
sarthakjaiswal 0:4b3056d3c684 61 unsigned index = songname.find(".wav");
sarthakjaiswal 0:4b3056d3c684 62 songname = songname.substr(0,index);
sarthakjaiswal 0:4b3056d3c684 63 lcd.cls();
sarthakjaiswal 0:4b3056d3c684 64 lcd.printf(songname.c_str());
sarthakjaiswal 0:4b3056d3c684 65 }
sarthakjaiswal 0:4b3056d3c684 66 void pb2_hit_callback (void)
sarthakjaiswal 0:4b3056d3c684 67 {
sarthakjaiswal 0:4b3056d3c684 68 int l = filenames.size();
sarthakjaiswal 0:4b3056d3c684 69 if (pos > 0) {
sarthakjaiswal 0:4b3056d3c684 70 pos--;
sarthakjaiswal 0:4b3056d3c684 71 } else if (pos == 0 ) {
sarthakjaiswal 0:4b3056d3c684 72 pos = l-1;
sarthakjaiswal 0:4b3056d3c684 73 }
sarthakjaiswal 0:4b3056d3c684 74 string songname = filenames[pos];
sarthakjaiswal 0:4b3056d3c684 75 unsigned index = songname.find(".wav");
sarthakjaiswal 0:4b3056d3c684 76 songname = songname.substr(0,index);
sarthakjaiswal 0:4b3056d3c684 77 lcd.cls();
sarthakjaiswal 0:4b3056d3c684 78 lcd.printf(songname.c_str());
sarthakjaiswal 0:4b3056d3c684 79 }
sarthakjaiswal 0:4b3056d3c684 80
sarthakjaiswal 0:4b3056d3c684 81 void pb3_hit_callback (void)
sarthakjaiswal 0:4b3056d3c684 82 {
sarthakjaiswal 0:4b3056d3c684 83 if (playing == false) {
sarthakjaiswal 0:4b3056d3c684 84 playing = true;
sarthakjaiswal 0:4b3056d3c684 85 // old_playing = false;
sarthakjaiswal 0:4b3056d3c684 86 } else if (playing == true) {
sarthakjaiswal 0:4b3056d3c684 87 lcd.cls();
sarthakjaiswal 0:4b3056d3c684 88 playing = false;
sarthakjaiswal 0:4b3056d3c684 89 // old_playing = true;
sarthakjaiswal 0:4b3056d3c684 90 string songname = filenames[pos];
sarthakjaiswal 0:4b3056d3c684 91 unsigned index = songname.find(".wav");
sarthakjaiswal 0:4b3056d3c684 92 songname = songname.substr(0,index);
sarthakjaiswal 0:4b3056d3c684 93 lcd.printf(songname.c_str());
sarthakjaiswal 0:4b3056d3c684 94 }
sarthakjaiswal 0:4b3056d3c684 95 }
sarthakjaiswal 0:4b3056d3c684 96 void pb4_hit_callback (void){
sarthakjaiswal 0:4b3056d3c684 97 vol = (vol+1) % 16;
sarthakjaiswal 0:4b3056d3c684 98 }
sarthakjaiswal 0:4b3056d3c684 99
sarthakjaiswal 0:4b3056d3c684 100 int main()
sarthakjaiswal 0:4b3056d3c684 101 {
sarthakjaiswal 0:4b3056d3c684 102 sdDetect.mode(PullUp);
sarthakjaiswal 0:4b3056d3c684 103 wait(.1);
sarthakjaiswal 0:4b3056d3c684 104 //wait after pulling up the sd card,
sarthakjaiswal 0:4b3056d3c684 105 // read file names into vector of strings
sarthakjaiswal 0:4b3056d3c684 106 pb1.mode(PullUp);
sarthakjaiswal 0:4b3056d3c684 107 pb2.mode(PullUp);
sarthakjaiswal 0:4b3056d3c684 108 pb3.mode(PullUp);
sarthakjaiswal 0:4b3056d3c684 109 pb4.mode(PullUp);
sarthakjaiswal 0:4b3056d3c684 110 // Delay for initial pullup to take effect
sarthakjaiswal 0:4b3056d3c684 111 wait(.01);
sarthakjaiswal 0:4b3056d3c684 112 // Setup Interrupt callback functions for a pb hit
sarthakjaiswal 0:4b3056d3c684 113 pb1.attach_deasserted(&pb1_hit_callback);
sarthakjaiswal 0:4b3056d3c684 114 pb2.attach_deasserted(&pb2_hit_callback);
sarthakjaiswal 0:4b3056d3c684 115 pb3.attach_deasserted(&pb3_hit_callback);
sarthakjaiswal 0:4b3056d3c684 116 pb4.attach_deasserted(&pb4_hit_callback);
sarthakjaiswal 0:4b3056d3c684 117 // Start sampling pb inputs using interrupts
sarthakjaiswal 0:4b3056d3c684 118 pb1.setSampleFrequency();
sarthakjaiswal 0:4b3056d3c684 119 pb2.setSampleFrequency();
sarthakjaiswal 0:4b3056d3c684 120 pb3.setSampleFrequency();
sarthakjaiswal 0:4b3056d3c684 121 pb4.setSampleFrequency();
sarthakjaiswal 0:4b3056d3c684 122 lcd.cls();
sarthakjaiswal 0:4b3056d3c684 123 while(sdDetect ==0) {
sarthakjaiswal 0:4b3056d3c684 124 lcd.locate(0,0);
sarthakjaiswal 0:4b3056d3c684 125 lcd.printf("Insert SD Card");
sarthakjaiswal 0:4b3056d3c684 126 wait(.5);
sarthakjaiswal 0:4b3056d3c684 127 }
sarthakjaiswal 0:4b3056d3c684 128 //sd.disk_initialize();
sarthakjaiswal 0:4b3056d3c684 129 lcd.cls();
sarthakjaiswal 0:4b3056d3c684 130 //SD_inserted();
sarthakjaiswal 0:4b3056d3c684 131 //lcd.locate(0,0);
sarthakjaiswal 0:4b3056d3c684 132 //lcd.printf("Insert SD Card");
sarthakjaiswal 0:4b3056d3c684 133 wait(.5);
sarthakjaiswal 0:4b3056d3c684 134 sd.disk_initialize();
sarthakjaiswal 0:4b3056d3c684 135 read_file_names("/sd/Music");
sarthakjaiswal 0:4b3056d3c684 136 while(1) {
sarthakjaiswal 0:4b3056d3c684 137 //while pb3 is low, then we can start playing the song
sarthakjaiswal 0:4b3056d3c684 138 while(playing == true) {
sarthakjaiswal 0:4b3056d3c684 139 string songname = filenames[pos];
sarthakjaiswal 0:4b3056d3c684 140 string a = "/sd/Music/";
sarthakjaiswal 0:4b3056d3c684 141 string fname = a + songname;
sarthakjaiswal 0:4b3056d3c684 142 FILE *wave_file;
sarthakjaiswal 0:4b3056d3c684 143 lcd.locate(0,1);
sarthakjaiswal 0:4b3056d3c684 144 lcd.printf("Now Playing");
sarthakjaiswal 0:4b3056d3c684 145 wave_file = fopen(fname.c_str(),"r");
sarthakjaiswal 0:4b3056d3c684 146 waver.play(wave_file);
sarthakjaiswal 0:4b3056d3c684 147 fclose(wave_file);
sarthakjaiswal 0:4b3056d3c684 148 }
sarthakjaiswal 0:4b3056d3c684 149 }
sarthakjaiswal 0:4b3056d3c684 150 }