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@2:087f60c3c445, 2016-12-12 (annotated)

Committer:
thaolmk54
Date:
Mon Dec 12 04:51:19 2016 +0000
Revision:
2:087f60c3c445
Parent:
1:45d8f6557ff8 
Music Player;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sarthakjaiswal 0:4b3056d3c684 1 #include "mbed.h"
sarthakjaiswal 0:4b3056d3c684 2 #include "wave_player.h"
sarthakjaiswal 0:4b3056d3c684 3 #include "PinDetect.h"
thaolmk54 2:087f60c3c445 4 #include "USBHostMSD.h"
thaolmk54 2:087f60c3c445 5 #include "C12832.h"
sarthakjaiswal 0:4b3056d3c684 6 #include <vector>
sarthakjaiswal 0:4b3056d3c684 7 #include <string>
sarthakjaiswal 1:45d8f6557ff8 8
sarthakjaiswal 1:45d8f6557ff8 9 //Set up LEDs
thaolmk54 2:087f60c3c445 10 DigitalOut led1( LED1 );
thaolmk54 2:087f60c3c445 11 DigitalOut led2( LED2 );
thaolmk54 2:087f60c3c445 12 DigitalOut led3( LED3 );
thaolmk54 2:087f60c3c445 13 DigitalOut led4( LED4 );
thaolmk54 2:087f60c3c445 14
thaolmk54 2:087f60c3c445 15 //Setup RGB led
thaolmk54 2:087f60c3c445 16 PwmOut r (p23); //RGB LED pins
thaolmk54 2:087f60c3c445 17 PwmOut g (p24);
thaolmk54 2:087f60c3c445 18 PwmOut b (p25);
sarthakjaiswal 0:4b3056d3c684 19
sarthakjaiswal 0:4b3056d3c684 20 using namespace std;
sarthakjaiswal 0:4b3056d3c684 21
thaolmk54 2:087f60c3c445 22 C12832 lcd(p5, p7, p6, p8, p11);
sarthakjaiswal 0:4b3056d3c684 23
thaolmk54 2:087f60c3c445 24 //Joystick controller
thaolmk54 2:087f60c3c445 25 PinDetect pb1(p13);//joyleft
thaolmk54 2:087f60c3c445 26 PinDetect pb2(p16);//joyright
thaolmk54 2:087f60c3c445 27 PinDetect pb3(p12); //joyup
thaolmk54 2:087f60c3c445 28 PinDetect pb4(p15); //joydown
thaolmk54 2:087f60c3c445 29 PinDetect pb5(p14);//center
sarthakjaiswal 0:4b3056d3c684 30
sarthakjaiswal 1:45d8f6557ff8 31 AnalogOut DACout(p18); //set up speaker
sarthakjaiswal 1:45d8f6557ff8 32 wave_player waver(&DACout); //set up wave player library
sarthakjaiswal 1:45d8f6557ff8 33 int pos = 0; // index of the song
sarthakjaiswal 1:45d8f6557ff8 34 int vol = 0; // volume controller
sarthakjaiswal 1:45d8f6557ff8 35
thaolmk54 2:087f60c3c445 36 bool playing = false; //variable for pause/play
thaolmk54 2:087f60c3c445 37 bool firstplay = false; //variable for first play
sarthakjaiswal 0:4b3056d3c684 38 vector<string> filenames; //filenames are stored in a vector string
thaolmk54 2:087f60c3c445 39
sarthakjaiswal 1:45d8f6557ff8 40 void read_file_names(char *dir) // function that reads in file names from sd cards
sarthakjaiswal 0:4b3056d3c684 41 {
sarthakjaiswal 0:4b3056d3c684 42 DIR *dp;
sarthakjaiswal 0:4b3056d3c684 43 struct dirent *dirp;
sarthakjaiswal 0:4b3056d3c684 44 dp = opendir(dir);
sarthakjaiswal 0:4b3056d3c684 45 //read all directory and file names in current directory into filename vector
sarthakjaiswal 0:4b3056d3c684 46 while((dirp = readdir(dp)) != NULL) {
sarthakjaiswal 0:4b3056d3c684 47 filenames.push_back(string(dirp->d_name));
sarthakjaiswal 0:4b3056d3c684 48 }
sarthakjaiswal 0:4b3056d3c684 49 }
thaolmk54 2:087f60c3c445 50
sarthakjaiswal 1:45d8f6557ff8 51 //interrupt handler for pb1
sarthakjaiswal 0:4b3056d3c684 52 void pb1_hit_callback (void)
thaolmk54 2:087f60c3c445 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 }
thaolmk54 2:087f60c3c445 60 led1 = 1;
thaolmk54 2:087f60c3c445 61 led2 = 0;
thaolmk54 2:087f60c3c445 62 led3 = 0;
thaolmk54 2:087f60c3c445 63 led4 = 0;
sarthakjaiswal 0:4b3056d3c684 64 }
sarthakjaiswal 1:45d8f6557ff8 65 //interrupt handler for pb2
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 }
thaolmk54 2:087f60c3c445 74 led1 = 0;
thaolmk54 2:087f60c3c445 75 led2 = 1;
thaolmk54 2:087f60c3c445 76 led3 = 0;
thaolmk54 2:087f60c3c445 77 led4 = 0;
thaolmk54 2:087f60c3c445 78 }
thaolmk54 2:087f60c3c445 79
thaolmk54 2:087f60c3c445 80 //interrupt handler for pb3
thaolmk54 2:087f60c3c445 81 void pb3_hit_callback (void){
thaolmk54 2:087f60c3c445 82 vol = (vol+1) % 16;
thaolmk54 2:087f60c3c445 83 led1 = 0;
thaolmk54 2:087f60c3c445 84 led2 = 0;
thaolmk54 2:087f60c3c445 85 led3 = 1;
thaolmk54 2:087f60c3c445 86 led4 = 0;
sarthakjaiswal 0:4b3056d3c684 87 }
thaolmk54 2:087f60c3c445 88
thaolmk54 2:087f60c3c445 89 //interrupt handler for pb4
thaolmk54 2:087f60c3c445 90 void pb4_hit_callback (void){
thaolmk54 2:087f60c3c445 91 if (vol > 1) {
thaolmk54 2:087f60c3c445 92 vol = (vol-1) % 16;
thaolmk54 2:087f60c3c445 93 }
thaolmk54 2:087f60c3c445 94 led1 = 0;
thaolmk54 2:087f60c3c445 95 led2 = 0;
thaolmk54 2:087f60c3c445 96 led3 = 0;
thaolmk54 2:087f60c3c445 97 led4 = 1;
thaolmk54 2:087f60c3c445 98 }
thaolmk54 2:087f60c3c445 99
sarthakjaiswal 1:45d8f6557ff8 100 //interrupt handler for 3rd pushbutton
thaolmk54 2:087f60c3c445 101 void pb5_hit_callback (void)
sarthakjaiswal 0:4b3056d3c684 102 {
sarthakjaiswal 1:45d8f6557ff8 103 //this interrupt handler changes the play to pause mode or vice versa
thaolmk54 2:087f60c3c445 104 if (playing == false && firstplay == false) {
sarthakjaiswal 1:45d8f6557ff8 105 playing = true;
thaolmk54 2:087f60c3c445 106 firstplay = true;
thaolmk54 2:087f60c3c445 107 r = 1;
sarthakjaiswal 0:4b3056d3c684 108 } else if (playing == true) {
sarthakjaiswal 0:4b3056d3c684 109 string songname = filenames[pos];
thaolmk54 2:087f60c3c445 110 playing = false;
thaolmk54 2:087f60c3c445 111 firstplay = false;
thaolmk54 2:087f60c3c445 112 g = 1;
sarthakjaiswal 0:4b3056d3c684 113 }
sarthakjaiswal 0:4b3056d3c684 114 }
thaolmk54 2:087f60c3c445 115
sarthakjaiswal 0:4b3056d3c684 116
sarthakjaiswal 0:4b3056d3c684 117 int main()
sarthakjaiswal 0:4b3056d3c684 118 {
thaolmk54 2:087f60c3c445 119 //test LCD display
thaolmk54 2:087f60c3c445 120 lcd.cls();
thaolmk54 2:087f60c3c445 121 lcd.locate(0,3);
thaolmk54 2:087f60c3c445 122 lcd.printf("MBED Music Player");
thaolmk54 2:087f60c3c445 123
thaolmk54 2:087f60c3c445 124 pb1.mode(PullDown);
thaolmk54 2:087f60c3c445 125 pb2.mode(PullDown);
thaolmk54 2:087f60c3c445 126 pb3.mode(PullDown);
thaolmk54 2:087f60c3c445 127 pb4.mode(PullDown);
thaolmk54 2:087f60c3c445 128 pb5.mode(PullDown);
thaolmk54 2:087f60c3c445 129
sarthakjaiswal 0:4b3056d3c684 130 wait(.01);
sarthakjaiswal 0:4b3056d3c684 131 // Setup Interrupt callback functions for a pb hit
sarthakjaiswal 0:4b3056d3c684 132 pb1.attach_deasserted(&pb1_hit_callback);
sarthakjaiswal 0:4b3056d3c684 133 pb2.attach_deasserted(&pb2_hit_callback);
sarthakjaiswal 0:4b3056d3c684 134 pb3.attach_deasserted(&pb3_hit_callback);
sarthakjaiswal 0:4b3056d3c684 135 pb4.attach_deasserted(&pb4_hit_callback);
thaolmk54 2:087f60c3c445 136 pb5.attach_deasserted(&pb5_hit_callback);
sarthakjaiswal 0:4b3056d3c684 137 // Start sampling pb inputs using interrupts
sarthakjaiswal 0:4b3056d3c684 138 pb1.setSampleFrequency();
sarthakjaiswal 0:4b3056d3c684 139 pb2.setSampleFrequency();
sarthakjaiswal 0:4b3056d3c684 140 pb3.setSampleFrequency();
sarthakjaiswal 0:4b3056d3c684 141 pb4.setSampleFrequency();
thaolmk54 2:087f60c3c445 142 pb5.setSampleFrequency();
thaolmk54 2:087f60c3c445 143
sarthakjaiswal 0:4b3056d3c684 144 lcd.cls();
thaolmk54 2:087f60c3c445 145 USBHostMSD msc("msc");
thaolmk54 2:087f60c3c445 146 // Check if a USB is connected
thaolmk54 2:087f60c3c445 147 while(!msc.connect()) {
sarthakjaiswal 0:4b3056d3c684 148 lcd.locate(0,0);
thaolmk54 2:087f60c3c445 149 lcd.printf("Insert USB");
sarthakjaiswal 0:4b3056d3c684 150 wait(.5);
sarthakjaiswal 1:45d8f6557ff8 151 }
thaolmk54 2:087f60c3c445 152 // Read the songs array, please note that your wav files have to be stored in the same directory
thaolmk54 2:087f60c3c445 153 read_file_names("/msc/music_wav");
thaolmk54 2:087f60c3c445 154
thaolmk54 2:087f60c3c445 155 while(1) {
thaolmk54 2:087f60c3c445 156 lcd.cls();
thaolmk54 2:087f60c3c445 157 lcd.locate(0,2);
thaolmk54 2:087f60c3c445 158 lcd.printf("Press joystick to play");
thaolmk54 2:087f60c3c445 159 //while pb3 is low, press fire button to start playing a song
thaolmk54 2:087f60c3c445 160 while(playing == true && firstplay == false) {
sarthakjaiswal 0:4b3056d3c684 161 string songname = filenames[pos];
thaolmk54 2:087f60c3c445 162 string a = "/msc/music_wav/";
sarthakjaiswal 1:45d8f6557ff8 163 string fname = a + songname; //retrieves the file name
sarthakjaiswal 1:45d8f6557ff8 164 FILE *wave_file;
thaolmk54 2:087f60c3c445 165 lcd.cls();
sarthakjaiswal 0:4b3056d3c684 166 lcd.locate(0,1);
thaolmk54 2:087f60c3c445 167 lcd.printf("Playing: %s",fname.c_str());
sarthakjaiswal 1:45d8f6557ff8 168 wave_file = fopen(fname.c_str(),"r"); //opens the music file
thaolmk54 2:087f60c3c445 169 waver.play(wave_file);
sarthakjaiswal 0:4b3056d3c684 170 fclose(wave_file);
sarthakjaiswal 0:4b3056d3c684 171 }
thaolmk54 2:087f60c3c445 172 firstplay = false;
thaolmk54 2:087f60c3c445 173 // if device disconnected, try to connect again
thaolmk54 2:087f60c3c445 174 if (!msc.connected())
thaolmk54 2:087f60c3c445 175 break;
sarthakjaiswal 0:4b3056d3c684 176 }
sarthakjaiswal 0:4b3056d3c684 177 }
thaolmk54 2:087f60c3c445 178