Diff: main.cpp

Revision:

0:1cb83aab3f9a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Dec 08 20:20:09 2016 +0000
@@ -0,0 +1,359 @@
+#include "mbed.h"
+#include "SDFileSystem.h"
+#include "wave_player.h"
+#include "Speaker.h"
+#include <vector>
+#include <string>
+#include "uLCD_4DGL.h"
+#include "VS1002.h"
+#include "mpr121.h"
+
+FILE *wave_file;
+string current_file;
+string print_file;
+string song;
+string new_song;
+Serial pc(USBTX, USBRX);
+SDFileSystem sd(p5, p6, p7, p8, "sd"); //SD card
+AnalogOut DACout(p18);
+uLCD_4DGL uLCD(p28, p27, p29);
+Ticker play_time;
+
+vector<string> filenames; //filenames are stored in a vector string
+
+int startStop = 0;
+
+// OutKast, Kanye, Kenny Rogers, Sinatra, Odesza, DMX, 21 Pilots, Eminem
+int array[] = { 0x000066, 0x000044, 0x000011, 0x000055, 0x000000, 0x000033, 0x000022, 0x000077};
+vector<int> artwork(array, array + 8);
+//below code goes in song playing function
+//uLCD.media_init();
+//uLCD.set_sector_address(0x0000, artwork[selected]);
+//uLCD.display_image(0,0);
+
+void read_file_names(char *dir)
+{
+    DIR *dp;
+    struct dirent *dirp;
+    dp = opendir(dir);
+    //read all directory and file names in current directory into filename vector
+    while((dirp = readdir(dp)) != NULL) {
+        filenames.push_back(string(dirp->d_name));
+    }
+}
+
+VS1002 mp3(p5, p6, p7, p8,"sd",p11, p12 ,p13, p14, p23, p22, p21, p15);  //Setup Audio decoder. Name is VS1002 even though VS1053 is used.
+InterruptIn interrupt(p26); // Create the interrupt receiver object on pin 26
+I2C i2c(p9, p10); // Setup the i2c bus on pins 9 and 10
+Mpr121 mpr121(&i2c, Mpr121::ADD_VSS); //Setup Mpr121
+
+/* Global Variables to store Status*/
+int new_song_number=0;  //Variable to store the Song Number
+int old_song_number=0;
+int volume_left = -15;     //Variable to store the Volume
+int volume_right = -15;
+int previous_volume_left;    //Variable to store the volume when muted
+int previous_volume_right;
+bool stop=true;
+bool pause=false;
+bool old_pause=false;       //Variable to store the status of Pause button
+bool mute=false;
+bool old_mute=false;        //Variable to store the status of mute button
+int size;
+int first;
+int t=0;
+int m=0;
+int oldt=0;
+int selected = 0;
+int check = 0;   //Capacitative touch generates interrupt on both press and release. This variable tracks this and updates only on press.
+int fade=0;
+int old_fade=0;
+int n=0;
+int fade_percent;
+string print_fade="Center";
+
+void counter(void){
+     if(!pause)
+     {
+        t++;
+        if(t%60==0)
+        {
+            t=0;
+            m++;
+        }
+     }
+}
+
+void fade_left(void)
+{
+    fade--;
+    //pc.printf("fade left\n\rfade=%i\n\r",fade);
+    if(fade<-5)
+        fade=-5;
+    fade_percent = abs(fade)*20;
+    if(fade==0)
+    {
+        volume_left=volume_right;
+        print_fade=("Center");
+    }
+    if(fade<0)
+    {
+        n=(volume_left+60)/5;
+        volume_right=volume_left+fade*n;
+        print_fade="Left";
+      //  pc.printf("fade<0 volume_left=%i volume_right=%i n=%i\n\r",volume_left,volume_right,n);
+    }
+    if(fade>0)
+    {
+        n=(volume_right+60)/5;
+        volume_left=volume_right-fade*n; 
+        print_fade="Right";
+      //  pc.printf("fade>0 volume_left=%i volume_right=%i n=%i\n\r",volume_left,volume_right,n);  
+    }      
+}
+
+void fade_right(void)
+{
+    fade++;
+    pc.printf("fade right\n\rfade=%i\n\r",fade);
+    if(fade>5)
+        fade=5;
+    fade_percent = abs(fade)*20;
+    if(fade==0)
+    {
+        volume_right=volume_left;
+        print_fade=("Center");
+    }
+    if(fade<0)
+    {
+        n=(volume_left+60)/5;
+        volume_right=volume_left+fade*n;
+        print_fade="Left";
+    //    pc.printf("fade<0 volume_left=%i volume_right=%i n=%i\n\r",volume_left,volume_right,n);
+    }
+    if(fade>0)
+    {
+        n=(volume_right+60)/5;
+        volume_left=volume_right-fade*n;
+        print_fade="Right";
+   //     pc.printf("fade>0 volume_left=%i volume_right=%i n=%i\n\r",volume_left,volume_right,n);   
+    }      
+}
+
+void volume_up(void)
+{
+    if(fade==0)
+    {
+        if(volume_right!=0)
+            volume_right+=5;
+        if(volume_left!=0)
+            volume_left+=5;
+    }
+    if(fade<0)
+    {
+        if(volume_left!=0)
+        {
+            volume_left+=5;
+            n=(volume_left+60)/5;
+            volume_right=volume_left+fade*n;
+        }   
+    }
+    if(fade>0)
+    {
+        if(volume_right!=0)
+        {
+            volume_right+=5;
+            n=(volume_right+60)/5;
+            volume_left=volume_right-fade*n; 
+        }   
+    }
+}
+
+void volume_down(void)
+{
+    if(fade==0)
+    {
+        if(volume_right!=-60)
+            volume_right-=5;
+        if(volume_left!=-60)
+            volume_left-=5;
+    }
+    if(fade<0)
+    {
+        if(volume_left!=-60)
+        {
+            volume_left-=5;
+            n=(volume_left+60)/5;
+            volume_right=volume_left+fade*n;
+            if(volume_right<-60)
+                volume_right=-60;
+        }   
+    }
+    if(fade>0)
+    {
+        if(volume_right!=-60)
+        {
+            volume_right-=5;
+            n=(volume_right+60)/5;
+            volume_left=volume_right-fade*n;
+            if(volume_left<-60)
+                volume_left=-60; 
+        }   
+    }
+}
+
+void fallInterrupt()
+{
+    int key_code=0;
+    int i=0;
+    int value;
+    value=mpr121.read(0x00);
+    value +=mpr121.read(0x01)<<8;
+
+    i=0;
+    if(check)
+        check=0;
+    else
+        check=1;
+    if(check) {
+        for (i=0; i<12; i++) {
+            if (((value>>i)&0x01)==1) key_code=i+1; //Convert value into decimal
+        }
+
+        switch(key_code) { // Different cases depending on key press
+            case 0:
+                break;  // Invalid entry . Valid 1-12
+            case 1:
+                if(stop)
+                {
+                    new_song_number+=1;  // Move selecter down
+                    if(new_song_number==filenames.size())
+                        new_song_number=0; // go back to beginning of vector
+                }
+                break;
+            case 2:
+            //play/stop button
+                stop=!stop;
+                first=0;
+                break;
+            case 3:
+                fade_right();
+                break;
+            case 4:
+                fade_left();
+                break;
+            case 5:
+                if(stop)
+                {
+                    new_song_number-=1;  // move selecetor up
+                    if(new_song_number==-1)
+                        new_song_number=filenames.size()-1;  // Go to end of vector
+                }
+                break;
+            case 6:
+                break;
+            case 7:
+                new_song_number+=1;  // Otherwise Next song
+                if(new_song_number==filenames.size()){
+                    new_song_number=0;  // go back to beginning of vector
+                }
+                break;
+            case 8:
+                new_song_number-=1;  // Previous Song
+                if(new_song_number==-1){
+                   new_song_number=filenames.size()-1;  // Go to end of vector
+                }
+                break;
+            case 9:
+                old_pause=pause;
+                pause=!pause; // Pause/Play button
+                //stop=false;
+                //first=0;
+                break;
+            case 10:
+                volume_up();
+                break;
+            case 11:
+                volume_down();
+                break;
+            case 12:
+                old_mute=mute;
+                mute=!mute;  //Mute/Unmute
+                if(mute) {
+                    previous_volume_left = volume_left; // Attenuation of -55 db is small enough to not hear anything
+                    previous_volume_right = volume_right;
+                    volume_left = -60;
+                    volume_right = -60;
+                } else {
+                    volume_left=previous_volume_left;
+                    volume_right = previous_volume_right;
+                }
+                break;
+            default:
+                uLCD.cls();
+                uLCD.printf("error");  // exit on error
+                exit(1);
+        }
+    }
+}
+int main ()
+{
+    read_file_names("/sd/myMusic"); // read file names into vector of strings
+
+    
+    /*============================================================
+     * MP3 Initialising
+     *==========================================================*/
+
+    mp3._RST = 1;
+    mp3.cs_high();                                  //chip disabled
+    mp3.sci_initialise();                           //initialise MBED
+    mp3.sci_write(0x00,(SM_SDINEW+SM_STREAM+SM_DIFF));
+    mp3.sci_write(0x03, 0x9800);
+    mp3.sdi_initialise();
+
+
+    /* Touch Pad setup */
+    interrupt.fall(&fallInterrupt);
+    interrupt.mode(PullUp);
+    play_time.attach(&counter, 1.0);
+
+    while(1) {
+        if(stop)
+        {
+            if(first==0)
+            {
+                uLCD.cls();
+                int i=0;
+                            // print filename strings from vector using an iterator
+                for(vector<string>::iterator it=filenames.begin(); it < filenames.end(); it++) 
+                {
+                    print_file = (*it).substr(0, ((*it).size() - 4));
+                    uLCD.locate(1,i);
+                    uLCD.printf("%s\n",print_file.c_str());
+                    i++;
+                }
+                size = filenames.size();
+                first++;
+            }
+            uLCD.locate(0,new_song_number);
+            uLCD.printf("*");
+            if(old_song_number!=new_song_number)
+            {
+                uLCD.locate(0,old_song_number);
+                uLCD.printf(" ");
+                old_song_number=new_song_number;
+            }
+        }
+        if(!stop)
+        {
+            current_file = filenames[new_song_number];
+            print_file = current_file.substr(0, (current_file.size() - 4));
+            string song = "/sd/myMusic/" + current_file;
+            mp3.play_song(song, print_file, new_song_number);
+        }
+    }
+
+}
+
+