Diff: main.cpp

Revision:

0:a265079d50a2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Oct 06 06:49:38 2011 +0000
@@ -0,0 +1,124 @@
+/* Author: Pramod Nataraja & Vishnu Venkat  */
+ 
+ #include "mbed.h" 
+ #include "VS1002.h" 
+ #include "TextLCD.h"
+ #include "mpr121.h"
+  
+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.
+TextLCD lcd1(p30, p29, p17, p18, p19, p20); //setup lcd
+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=1;  //Variable to store the Song Number
+int volume_set=-20;     //Variable to store the Volume
+int previous_volume;    //Variable to store the volume when muted
+bool pause=false;       //Variable to store the status of Pause button 
+bool mute=false;        //Variable to store the status of mute button
+
+int check=0;    //Capacitative touch generates interrupt on both press and release. This variable tracks this and updates only on press.
+char *song_name[6]={"18 till I Die","Summer of 69","Boulevard", "Serenity","Crawling","In the end"}; //Array of song names entered manually
+
+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:   
+  case 2:  
+  case 3:  
+  case 4:    
+  case 5:     
+  case 6: new_song_number=key_code; // Play the selected song
+          break; 
+  case 7:new_song_number+=1;  // Next song
+          if(new_song_number==7)
+           new_song_number=1;
+          break;
+  case 8: new_song_number-=1;  // Previous Song
+          if(new_song_number==0)
+           new_song_number=6;
+          break;
+  case 9: pause=!pause; // Pause/Play button
+          break;
+  case 10: volume_set+=3; // Volume Up
+           if(volume_set>=0)
+            volume_set=0;
+           break;
+  case 11: volume_set-=3;  //Volume Down
+           if(volume_set<-55)
+            volume_set=-55;
+            break;
+  case 12: mute=!mute;  //Mute/Unmute
+           if(mute)
+           {
+            previous_volume=volume_set; // Attenuation of -55 db is small enough to not hear anything
+            volume_set=-55;
+           }
+           else
+           {
+           volume_set=previous_volume;
+           }
+           break;
+  default: lcd1.cls();
+           lcd1.printf("error");  // exit on error
+           exit(1);
+        }
+ }
+ /* Print to LCD the status of Song */
+  lcd1.cls();
+  if(pause)
+    lcd1.printf("Paused ");
+  if(mute)
+   lcd1.printf("Muted");
+  if(!mute && !pause)
+   lcd1.printf("Playing"); 
+  lcd1.printf("\n %d %s",new_song_number,song_name[new_song_number-1]);
+  
+ }
+
+ int main () 
+ {       
+     /*============================================================ 
+      * 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);
+
+         while(1)
+         {
+         mp3.play_song(new_song_number);
+         }       
+ 
+ } 
+ 
+