Thao Le Minh / Mbed 2 deprecated MusicPlayer_Thao_Yan_Melvin

Final code

Dependencies:   C12832 PinDetect USBHost mbed wave_player

Fork of MusicPlayer_ThaoLeMinh by Yan Long

main.cpp@4:314af6e95daf, 2016-12-15 (annotated)

Committer:
thaolmk54
Date:
Thu Dec 15 13:49:06 2016 +0000
Revision:
4:314af6e95daf
Parent:
3:82b68ab94e3e 
Final code_Thao

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"
LyCosine 3:82b68ab94e3e 6 #include "ReadTime.h"
sarthakjaiswal 0:4b3056d3c684 7 #include <vector>
sarthakjaiswal 0:4b3056d3c684 8 #include <string>
sarthakjaiswal 1:45d8f6557ff8 9
sarthakjaiswal 1:45d8f6557ff8 10 //Set up LEDs
thaolmk54 2:087f60c3c445 11 DigitalOut led1( LED1 );
thaolmk54 2:087f60c3c445 12 DigitalOut led2( LED2 );
thaolmk54 2:087f60c3c445 13 DigitalOut led3( LED3 );
thaolmk54 2:087f60c3c445 14 DigitalOut led4( LED4 );
thaolmk54 2:087f60c3c445 15
thaolmk54 2:087f60c3c445 16 //Setup RGB led
thaolmk54 2:087f60c3c445 17 PwmOut r (p23); //RGB LED pins
thaolmk54 2:087f60c3c445 18 PwmOut g (p24);
thaolmk54 2:087f60c3c445 19 PwmOut b (p25);
sarthakjaiswal 0:4b3056d3c684 20
sarthakjaiswal 0:4b3056d3c684 21 using namespace std;
sarthakjaiswal 0:4b3056d3c684 22
thaolmk54 2:087f60c3c445 23 C12832 lcd(p5, p7, p6, p8, p11);
sarthakjaiswal 0:4b3056d3c684 24
thaolmk54 2:087f60c3c445 25 //Joystick controller
thaolmk54 2:087f60c3c445 26 PinDetect pb1(p13);//joyleft
thaolmk54 2:087f60c3c445 27 PinDetect pb2(p16);//joyright
thaolmk54 4:314af6e95daf 28 PinDetect pb3(p12);//joyup
thaolmk54 4:314af6e95daf 29 PinDetect pb4(p15);//joydown
thaolmk54 2:087f60c3c445 30 PinDetect pb5(p14);//center
sarthakjaiswal 0:4b3056d3c684 31
LyCosine 3:82b68ab94e3e 32 Timer timer; //timer
LyCosine 3:82b68ab94e3e 33
sarthakjaiswal 1:45d8f6557ff8 34 AnalogOut DACout(p18); //set up speaker
sarthakjaiswal 1:45d8f6557ff8 35 wave_player waver(&DACout); //set up wave player library
thaolmk54 4:314af6e95daf 36 int pos = 0; // song index
thaolmk54 4:314af6e95daf 37 int vol = 0; // volume level
sarthakjaiswal 1:45d8f6557ff8 38
thaolmk54 4:314af6e95daf 39 bool playing = false; //controlling playing state
thaolmk54 2:087f60c3c445 40 bool firstplay = false; //variable for first play
LyCosine 3:82b68ab94e3e 41 int total_time = 0;
thaolmk54 4:314af6e95daf 42 vector<string> songnames; //array to store name of songs
thaolmk54 2:087f60c3c445 43
sarthakjaiswal 1:45d8f6557ff8 44 void read_file_names(char *dir) // function that reads in file names from sd cards
sarthakjaiswal 0:4b3056d3c684 45 {
sarthakjaiswal 0:4b3056d3c684 46 DIR *dp;
sarthakjaiswal 0:4b3056d3c684 47 struct dirent *dirp;
sarthakjaiswal 0:4b3056d3c684 48 dp = opendir(dir);
thaolmk54 4:314af6e95daf 49 //read all directory and then put file paths into a vector
sarthakjaiswal 0:4b3056d3c684 50 while((dirp = readdir(dp)) != NULL) {
thaolmk54 4:314af6e95daf 51 songnames.push_back(string(dirp->d_name));
sarthakjaiswal 0:4b3056d3c684 52 }
sarthakjaiswal 0:4b3056d3c684 53 }
thaolmk54 2:087f60c3c445 54
thaolmk54 4:314af6e95daf 55 //interrupt handler for shifting farward to next song
thaolmk54 4:314af6e95daf 56 void pb1_next_song (void)
thaolmk54 2:087f60c3c445 57 {
thaolmk54 4:314af6e95daf 58 int l = songnames.size();
sarthakjaiswal 0:4b3056d3c684 59 if (pos < (l-1)) {
sarthakjaiswal 0:4b3056d3c684 60 pos++;
sarthakjaiswal 0:4b3056d3c684 61 } else if (pos == (l-1)) {
sarthakjaiswal 0:4b3056d3c684 62 pos = 0;
sarthakjaiswal 0:4b3056d3c684 63 }
thaolmk54 2:087f60c3c445 64 led1 = 1;
thaolmk54 2:087f60c3c445 65 led2 = 0;
thaolmk54 2:087f60c3c445 66 led3 = 0;
thaolmk54 2:087f60c3c445 67 led4 = 0;
sarthakjaiswal 0:4b3056d3c684 68 }
thaolmk54 4:314af6e95daf 69 //interrupt handler for shifting back to privious song
thaolmk54 4:314af6e95daf 70 void pb2_previous_song (void)
sarthakjaiswal 0:4b3056d3c684 71 {
thaolmk54 4:314af6e95daf 72 int l = songnames.size();
sarthakjaiswal 0:4b3056d3c684 73 if (pos > 0) {
sarthakjaiswal 0:4b3056d3c684 74 pos--;
sarthakjaiswal 0:4b3056d3c684 75 } else if (pos == 0 ) {
sarthakjaiswal 0:4b3056d3c684 76 pos = l-1;
sarthakjaiswal 0:4b3056d3c684 77 }
thaolmk54 2:087f60c3c445 78 led1 = 0;
thaolmk54 2:087f60c3c445 79 led2 = 1;
thaolmk54 2:087f60c3c445 80 led3 = 0;
thaolmk54 2:087f60c3c445 81 led4 = 0;
thaolmk54 2:087f60c3c445 82 }
thaolmk54 2:087f60c3c445 83
thaolmk54 4:314af6e95daf 84 //interrupt handler for volume up
thaolmk54 4:314af6e95daf 85 void pb3_volume_up (void){
thaolmk54 2:087f60c3c445 86 vol = (vol+1) % 16;
thaolmk54 2:087f60c3c445 87 led1 = 0;
thaolmk54 2:087f60c3c445 88 led2 = 0;
thaolmk54 2:087f60c3c445 89 led3 = 1;
thaolmk54 2:087f60c3c445 90 led4 = 0;
sarthakjaiswal 0:4b3056d3c684 91 }
thaolmk54 2:087f60c3c445 92
thaolmk54 4:314af6e95daf 93 //interrupt handler for volume down
thaolmk54 4:314af6e95daf 94 void pb4_volume_down (void){
thaolmk54 2:087f60c3c445 95 if (vol > 1) {
thaolmk54 2:087f60c3c445 96 vol = (vol-1) % 16;
thaolmk54 2:087f60c3c445 97 }
thaolmk54 2:087f60c3c445 98 led1 = 0;
thaolmk54 2:087f60c3c445 99 led2 = 0;
thaolmk54 2:087f60c3c445 100 led3 = 0;
thaolmk54 2:087f60c3c445 101 led4 = 1;
thaolmk54 2:087f60c3c445 102 }
thaolmk54 2:087f60c3c445 103
thaolmk54 4:314af6e95daf 104 //interrupt handler for play/pause
thaolmk54 4:314af6e95daf 105 void pb5_play_pause (void)
sarthakjaiswal 0:4b3056d3c684 106 {
sarthakjaiswal 1:45d8f6557ff8 107 //this interrupt handler changes the play to pause mode or vice versa
thaolmk54 2:087f60c3c445 108 if (playing == false && firstplay == false) {
sarthakjaiswal 1:45d8f6557ff8 109 playing = true;
thaolmk54 2:087f60c3c445 110 firstplay = true;
thaolmk54 2:087f60c3c445 111 r = 1;
sarthakjaiswal 0:4b3056d3c684 112 } else if (playing == true) {
thaolmk54 4:314af6e95daf 113 string songname = songnames[pos];
thaolmk54 2:087f60c3c445 114 playing = false;
thaolmk54 2:087f60c3c445 115 firstplay = false;
thaolmk54 2:087f60c3c445 116 g = 1;
sarthakjaiswal 0:4b3056d3c684 117 }
sarthakjaiswal 0:4b3056d3c684 118 }
thaolmk54 2:087f60c3c445 119
LyCosine 3:82b68ab94e3e 120 void show_information(const void *argv) {
LyCosine 3:82b68ab94e3e 121 while (1) {
LyCosine 3:82b68ab94e3e 122 int t = timer.read();//playing time
LyCosine 3:82b68ab94e3e 123 int left_time = total_time - t;//left time
LyCosine 3:82b68ab94e3e 124 int bar_len = 21 * t / total_time;//length of bar
LyCosine 3:82b68ab94e3e 125 lcd.cls();
LyCosine 3:82b68ab94e3e 126 lcd.locate(0,0);
LyCosine 3:82b68ab94e3e 127
LyCosine 3:82b68ab94e3e 128 lcd.locate(100,0);
LyCosine 3:82b68ab94e3e 129 lcd.printf("vol: %d", 15 - vol);
LyCosine 3:82b68ab94e3e 130 lcd.locate(0,20);
LyCosine 3:82b68ab94e3e 131 for (int i = 0; i < bar_len; i++) {
LyCosine 3:82b68ab94e3e 132 lcd.printf("_");
LyCosine 3:82b68ab94e3e 133 }
LyCosine 3:82b68ab94e3e 134 int min1 = t / 60;
LyCosine 3:82b68ab94e3e 135 int sec1 = t % 60;
LyCosine 3:82b68ab94e3e 136 int min2 = left_time / 60;
LyCosine 3:82b68ab94e3e 137 int sec2 = left_time % 60;
LyCosine 3:82b68ab94e3e 138 lcd.locate(0,18);
LyCosine 3:82b68ab94e3e 139 lcd.printf("%02d:%02d", min1, sec1);
LyCosine 3:82b68ab94e3e 140 lcd.locate(105,18);
LyCosine 3:82b68ab94e3e 141 lcd.printf("%02d:%02d", min2, sec2);
LyCosine 3:82b68ab94e3e 142 Thread::wait(500);
LyCosine 3:82b68ab94e3e 143 }
LyCosine 3:82b68ab94e3e 144 }
LyCosine 3:82b68ab94e3e 145
sarthakjaiswal 0:4b3056d3c684 146
sarthakjaiswal 0:4b3056d3c684 147 int main()
sarthakjaiswal 0:4b3056d3c684 148 {
thaolmk54 2:087f60c3c445 149 //test LCD display
thaolmk54 2:087f60c3c445 150 lcd.cls();
thaolmk54 2:087f60c3c445 151 lcd.locate(0,3);
thaolmk54 2:087f60c3c445 152 lcd.printf("MBED Music Player");
thaolmk54 2:087f60c3c445 153
thaolmk54 2:087f60c3c445 154 pb1.mode(PullDown);
thaolmk54 2:087f60c3c445 155 pb2.mode(PullDown);
thaolmk54 2:087f60c3c445 156 pb3.mode(PullDown);
thaolmk54 2:087f60c3c445 157 pb4.mode(PullDown);
thaolmk54 2:087f60c3c445 158 pb5.mode(PullDown);
thaolmk54 2:087f60c3c445 159
sarthakjaiswal 0:4b3056d3c684 160 wait(.01);
thaolmk54 4:314af6e95daf 161 // Setup Interrupt callback functions for 5-way joystick
thaolmk54 4:314af6e95daf 162 pb1.attach_deasserted(&pb1_next_song);
thaolmk54 4:314af6e95daf 163 pb2.attach_deasserted(&pb2_previous_song);
thaolmk54 4:314af6e95daf 164 pb3.attach_deasserted(&pb3_volume_up);
thaolmk54 4:314af6e95daf 165 pb4.attach_deasserted(&pb4_volume_down);
thaolmk54 4:314af6e95daf 166 pb5.attach_deasserted(&pb5_play_pause);
thaolmk54 4:314af6e95daf 167 // Start sampling
sarthakjaiswal 0:4b3056d3c684 168 pb1.setSampleFrequency();
sarthakjaiswal 0:4b3056d3c684 169 pb2.setSampleFrequency();
sarthakjaiswal 0:4b3056d3c684 170 pb3.setSampleFrequency();
sarthakjaiswal 0:4b3056d3c684 171 pb4.setSampleFrequency();
thaolmk54 2:087f60c3c445 172 pb5.setSampleFrequency();
thaolmk54 2:087f60c3c445 173
sarthakjaiswal 0:4b3056d3c684 174 lcd.cls();
thaolmk54 2:087f60c3c445 175 USBHostMSD msc("msc");
thaolmk54 2:087f60c3c445 176 // Check if a USB is connected
thaolmk54 2:087f60c3c445 177 while(!msc.connect()) {
sarthakjaiswal 0:4b3056d3c684 178 lcd.locate(0,0);
thaolmk54 2:087f60c3c445 179 lcd.printf("Insert USB");
sarthakjaiswal 1:45d8f6557ff8 180 }
thaolmk54 2:087f60c3c445 181 // Read the songs array, please note that your wav files have to be stored in the same directory
thaolmk54 2:087f60c3c445 182 read_file_names("/msc/music_wav");
thaolmk54 2:087f60c3c445 183
thaolmk54 2:087f60c3c445 184 while(1) {
thaolmk54 2:087f60c3c445 185 lcd.cls();
thaolmk54 2:087f60c3c445 186 lcd.locate(0,2);
thaolmk54 2:087f60c3c445 187 lcd.printf("Press joystick to play");
thaolmk54 2:087f60c3c445 188 //while pb3 is low, press fire button to start playing a song
thaolmk54 2:087f60c3c445 189 while(playing == true && firstplay == false) {
thaolmk54 4:314af6e95daf 190 string songname = songnames[pos];
thaolmk54 2:087f60c3c445 191 string a = "/msc/music_wav/";
sarthakjaiswal 1:45d8f6557ff8 192 string fname = a + songname; //retrieves the file name
sarthakjaiswal 1:45d8f6557ff8 193 FILE *wave_file;
thaolmk54 2:087f60c3c445 194 lcd.cls();
LyCosine 3:82b68ab94e3e 195 total_time = (int)ReadTime(fname.c_str());
sarthakjaiswal 1:45d8f6557ff8 196 wave_file = fopen(fname.c_str(),"r"); //opens the music file
LyCosine 3:82b68ab94e3e 197 Thread thread(show_information);
LyCosine 3:82b68ab94e3e 198 timer.start();
thaolmk54 2:087f60c3c445 199 waver.play(wave_file);
LyCosine 3:82b68ab94e3e 200 timer.stop();
LyCosine 3:82b68ab94e3e 201 timer.reset();
sarthakjaiswal 0:4b3056d3c684 202 fclose(wave_file);
sarthakjaiswal 0:4b3056d3c684 203 }
thaolmk54 2:087f60c3c445 204 firstplay = false;
thaolmk54 2:087f60c3c445 205 // if device disconnected, try to connect again
thaolmk54 2:087f60c3c445 206 if (!msc.connected())
thaolmk54 2:087f60c3c445 207 break;
sarthakjaiswal 0:4b3056d3c684 208 }
sarthakjaiswal 0:4b3056d3c684 209 }
thaolmk54 2:087f60c3c445 210