main.cpp

00001 //Jason Mar
00002 #include "mbed.h"
00003 #include "SDFileSystem.h"
00004 #include "wave_player.h"
00005 #include "uLCD_4DGL.h"
00006 #include "PinDetect.h"
00007 #include <string>
00008 #include <vector>
00009 
00010 //initialize all pins
00011 SDFileSystem sd(p5, p6, p7, p8, p9, "sd"); //SD card
00012 uLCD_4DGL uLCD(p28, p27, p29);
00013 PinDetect pb1(p24);
00014 PinDetect pb2(p23);
00015 PinDetect pb3(p22);
00016 PinDetect pb4(p21);
00017 
00018 AnalogOut DACout(p18);
00019 
00020 wave_player waver(&DACout);
00021 //unused pins
00022 DigitalOut P10(p10);
00023 DigitalOut P11(p11);
00024 DigitalOut P12(p12);
00025 DigitalOut P13(p13);
00026 DigitalOut P14(p14);
00027 DigitalOut P15(p15);
00028 DigitalOut P16(p16);
00029 DigitalOut P17(p17);
00030 DigitalOut P19(p19);
00031 DigitalOut P20(p20);
00032 
00033 vector<string> filenames; //filenames are stored in a vector string
00034 int volatile selection = 0;
00035 int volatile totalSongs = 0;
00036 bool play = false;
00037 bool *playptr = &play;
00038 
00039 //implement pushbuttons
00040 void pb1_hit_callback (void)
00041 {
00042    play = !play;
00043 }
00044 void pb2_hit_callback (void)
00045 {
00046     selection++;
00047     if(selection >= totalSongs)
00048         selection = 0;
00049 }
00050 void pb3_hit_callback (void)
00051 {
00052     selection--;
00053     if(selection < 0)
00054         selection = totalSongs - 1;
00055 }
00056 void pb4_hit_callback (void)
00057 {
00058     int *vol = waver.getVolume();
00059     *vol = *vol + 1;
00060     if (*vol >= 16){
00061         *vol = 0;
00062     }
00063 }
00064 //reads the file names
00065 void read_file_names(char *dir)
00066 {
00067     DIR *dp;
00068     struct dirent *dirp;
00069     dp = opendir(dir);
00070   //read all directory and file names in current directory into filename vector
00071     while((dirp = readdir(dp)) != NULL) {
00072         filenames.push_back(string(dirp->d_name));
00073         totalSongs++;
00074     }
00075     closedir(dp);
00076 }
00077 
00078 
00079 int main()
00080 {
00081     //initialize the buttons
00082     pb1.mode(PullUp);
00083     pb2.mode(PullUp);
00084     pb3.mode(PullUp);
00085     pb4.mode(PullUp);
00086     
00087     // Delay for initial pullup to take effect
00088     wait(.01);
00089     
00090     // Setup Interrupt callback functions for a pb hit
00091     pb1.attach_deasserted(&pb1_hit_callback);
00092     pb2.attach_deasserted(&pb2_hit_callback);
00093     pb3.attach_deasserted(&pb3_hit_callback);
00094     pb4.attach_deasserted(&pb4_hit_callback);
00095     
00096     // Start sampling pb inputs using interrupts
00097     pb1.setSampleFrequency();
00098     pb2.setSampleFrequency();
00099     pb3.setSampleFrequency();
00100     pb4.setSampleFrequency();
00101     
00102     //check for SD card insertion, if no sd card print Insert SD Card
00103     bool SDinsert = false;
00104     while(SDinsert == false){
00105         SDinsert = sd.sd_inserted();
00106         if(SDinsert == false){
00107             uLCD.locate(0,1);
00108             uLCD.printf("Insert SD Card");
00109         }
00110         else {
00111             sd.disk_initialize();
00112             uLCD.cls();
00113         }
00114     }
00115     FILE *file;
00116     read_file_names("/sd/myMusic");
00117     
00118          
00119     string song; 
00120     string dir;
00121     int c = 0;
00122     int prevfile = -1;
00123     while(1) {
00124         //prints the directory of songs and does not refresh until a pushbutton changes the selection
00125         if(c == 0 || selection != prevfile){
00126             prevfile = selection;
00127             uLCD.cls();
00128             uLCD.locate(0,0);
00129             //lists the directory songs in white and the selected song in red
00130             for(int i=0;i<totalSongs;i++){    
00131                 if(i != selection){
00132                     int l=filenames[i].size();
00133                     uLCD.locate(0,i);
00134                     uLCD.color(WHITE);
00135                     //substrings the .wav out of the print
00136                     uLCD.printf("%s",filenames[i].substr(0,l-4));
00137                 }
00138                 else {
00139                     int l=filenames[selection].size();
00140                     uLCD.locate(0,selection);
00141                     uLCD.color(RED);
00142                     uLCD.printf("%s",filenames[selection].substr(0,l-4));
00143                 }
00144             }   
00145         }
00146         c++;
00147         
00148         if(play==true) {
00149             //concatenates directory with songname
00150             dir="/sd/myMusic";    
00151             song = dir + "/" + filenames[selection];
00152             //reads the wav file
00153             file = fopen(song.c_str(), "r");
00154             //clears the screen to print song playiing
00155             uLCD.cls();
00156             int l=filenames[selection].size();
00157             uLCD.locate(0,0);
00158             uLCD.printf("%s",filenames[selection].substr(0,l-4));
00159             uLCD.locate(0,1);
00160             uLCD.printf("%s","Now Playing");
00161             waver.play(file,playptr);
00162             play=false;
00163             fclose(file);
00164             uLCD.cls();
00165             //reprint the menu as it was before the song started
00166             for(int i=0;i<totalSongs;i++){    
00167                 if(i != selection){
00168                     int l=filenames[i].size();
00169                     uLCD.locate(0,i);
00170                     uLCD.color(WHITE);
00171                     uLCD.printf("%s",filenames[i].substr(0,l-4));
00172                 }
00173                 else {
00174                     int l=filenames[selection].size();
00175                     uLCD.locate(0,selection);
00176                     uLCD.color(RED);
00177                     uLCD.printf("%s",filenames[selection].substr(0,l-4));
00178                 }
00179             }
00180         }
00181         else
00182             wait(0.3);
00183     }
00184 }