main.cpp

00001 #include "mbed.h"
00002 #include "string.h"
00003 #include "stdio.h"
00004 #include "math.h"
00005 #include "C12832.h"
00006 #include "WavPlayer.h"
00007 #include "SDFileSystem.h"
00008 #include <string>
00009 using namespace std;
00010 
00011 //Communication\interfaces
00012 Serial pc(USBTX,USBRX); //USB serial
00013 C12832 lcd(p5, p7, p6, p8, p11); //LCD
00014 SDFileSystem sd(p11, p12, p13, p15, "sd"); //SDCard
00015 DigitalIn sdDetect(p14); //CardDetect
00016 
00017 //in- and outputs
00018 DigitalIn PauseBtn(p21);
00019 DigitalIn StopBtn(p22);
00020 
00021 //joystick
00022 BusIn joy(p19,p17,p18,p20);
00023 DigitalIn joyBtn(p14);
00024 
00025 //DAC output
00026 WavPlayer waver; //set up DAC to use wave player library
00027 
00028 
00029 //timer
00030 Timer dur;
00031 
00032 //func
00033 void read_file_names(char *dir); //SDCard read file names
00034 void menu();
00035 void PlaySong(int m);
00036 void PauseSong();
00037 void StopSong();
00038 
00039 //variables
00040 int m = 1; //index of choosen songs
00041 int i = 0; //index of files from folder
00042 int Paused = 0; //Is the song paused?
00043 int Stopped = 0; //Is the song stopped?
00044 char* songs[];
00045 
00046 int main()
00047 {
00048     while(sdDetect == 0) {
00049         lcd.locate(0,0);
00050         lcd.printf("Insert SD Card!");
00051         wait(0.5);
00052     }
00053     menu();
00054 }
00055 
00056 void menu()
00057 {
00058     lcd.cls();
00059     sd.disk_initialize();
00060     read_file_names("/sd/Music");
00061     while(1) {
00062         lcd.locate(0,0);
00063         lcd.printf("Please select a song");
00064         if(joy == 1) {
00065             m++;
00066             if(m == 5) {
00067                 m = 0;
00068             }
00069         } else if(joy == 2) {
00070             m--;
00071             if(m == -1) {
00072                 m = 4;
00073             }
00074         }
00075         lcd.locate(0,15);
00076         lcd.printf("%s", (songs[m]));
00077         if(joyBtn == 1) {
00078             PlaySong(m);
00079         }
00080         wait(0.1);
00081     }
00082 }
00083 
00084 void read_file_names(char *dir) // function that reads in file names from sd cards
00085 {
00086     DIR *dp;
00087     struct dirent *dirp;
00088     dp = opendir(dir);
00089     //read all directory and file names in current directory into filename vector
00090     while((dirp = readdir(dp)) != NULL) {
00091         songs[i] = dirp->d_name;
00092         i++;
00093     }
00094 }
00095 
00096 void PlaySong(int m)
00097 {
00098     string songname = songs[m];
00099     string a = "/sd/Music/";
00100     string fname = a + songname; //retrieves the file name
00101     FILE *wave_file;
00102     dur.start();
00103     lcd.cls();
00104     lcd.locate(0,0);
00105     lcd.printf("Now playing");
00106     wave_file = fopen(fname.c_str(),"r"); //opens the music file
00107     waver.open(wave_file);
00108     waver.play(); //plays the music file
00109     lcd.locate(0,10);
00110     lcd.printf("%s", (songs[m]));
00111     while(Stopped == 0) {
00112         if(StopBtn == 1) {
00113             StopSong();
00114         }
00115         if(PauseBtn == 1) {
00116             PauseSong();
00117         }
00118         lcd.locate(0,20);
00119         lcd.printf("%2.f s", dur.read());
00120     }
00121     fclose(wave_file);
00122     menu();
00123 }
00124 
00125 void PauseSong()
00126 {
00127     while(1) {
00128         if(Paused == 0) {
00129             string songname = songs[m];
00130             unsigned index = songname.find(".wav");
00131             songname = songname.substr(0,index);
00132             lcd.printf(songname.c_str());
00133             dur.stop();
00134             Paused = 1;
00135         } else if(StopBtn == 1) {
00136             StopSong();
00137         } else {
00138             Paused = 0;
00139             dur.start();
00140         }
00141     }
00142 }
00143 
00144 void StopSong()
00145 {
00146     lcd.cls();
00147     dur.reset();
00148     Stopped = 1;
00149 }
00150 
00151 
00152 
00153