File content as of revision 6:e64796f1f384:

char readBit(int bitNumber){
        int value = 0;
        switch(bitNumber){
            case 1:
                value = cardBit1;
            break;
            case 2:
                value = cardBit2;
            break;
            case 3:
                 value = cardBit3;
            break;
            case 4:
                value = cardBit4;
            break;
            case 5:
                value = cardBit5;
            break;
            case 6:
                value = cardBit6;
            break;
            }
            return valueToChar(value);
    }
    
    void processMessage(char c){
     switch(c){
            case 'a' : //servo 1 clockwise
                sendCharacter('a'); //bounce back for acknowledgement
                printLCD("S1 clockwise");
            break;
            case 'b' :  //servo 1 anticlockwise
                sendCharacter('b');  //bounce back for acknowledgement
                printLCD("S1 anticlockwise");
            break;
            case 'c':
                sendCharacter('c'); //bounce back for acknowledgement
                printLCD("S1 stop");
            break;
            case 'C':// Read card command
                sendCharacter('R'); //Notify PC that command has been recieved
                printLCD("Reading Card");
                //read card here
                char value = ' ';
                for(int num = 1;num <= 6;num++){
                    value = readBit(num);
                   // sendCharacter('R');
                    sendCharacter(value);
                    printLCD("Bit read");
                    //wait(0.1);
                }
                sendCharacter('C'); //Tells PC that the card has been read
                printLCD("Card read done");
            break;
            case 'X':
                sendCharacter('X'); //Notify the PC that this is an MBED
                printLCD("Connected to PC");
            break;
            case 'd':   //Dispense a chip
                sendCharacter('D');
                printLCD("Dispensing chip");
              
                //read from color sensor
                //convert readings to colour
                //convert colour to 3-bit colour code
                //set the FPGA colour inputs to the colour code
                startSort = true; 
            break;
            case 't'://Test 180 servo
            sendCharacter('T');
            printLCD("Servo signal on");
            servoTest = true;
            break;
            case 'w'://Test 180 servo
            sendCharacter('W');
            printLCD("Servo signal off");
            servoTest = false;
            break;
        
        
        else if (operationMode){
            switch(c){
                case 'n':// Start sorting
                    sendCharacter('N'); //Confirm to PC that we are processing the instruction.
                    startSort = true; //Pulse the startSort control line to FPGA
                    wait(0.1);
                    startSort = false;
                break;
                case 'o':   //Start dispensing
                    sendCharacter('O');
                    startDispense = true; //Pulse the startDispense control line to FPGA
                    wait(0.1);
                    startDispense = false;
                break;
                case 'p':   //
                    sendCharacter('P');
                break;
                }
           }
}

void sendCharacter(char ch){
        pc.putc(ch);
}

void sendString(char* ch){
        pc.puts(ch);
}