File content as of revision 2:f06ba516b1ad:

#include "mbed.h"
Serial Blue(p28,p27);
Serial PC(USBTX,USBRX);
DigitalOut myled(LED1);
DigitalOut myled4(LED4);
//global variables for main and interrupt routine
volatile bool readyFlag = true;
volatile char keyPress;
//Interrupt routine to parse message with one new character per serial RX interrupt
void parse_message()
{
    keyPress = Blue.getc();
    PC.putc(keyPress);
    readyFlag = true;
    PC.printf("\n\r Value of readyFlag is: %i",readyFlag);
    
    //PC.printf("Value of keyPress is: %c\n\r",keyPress);
}
 
 
 
WaveType myWave = sine; // default to sine wave
int currentOctave = 4; // default to 4 because thats where middle C is
 
 
int main()
{
//attach interrupt function for each new Bluetooth serial character
    Blue.attach(&parse_message,Serial::RxIrq);
    while(1) {
        //check for a new button message ready
        if((keyPress == C_KEY) && (readyFlag))// button Z pressed
        {
            PC.printf("Got n Z");
            readyFlag = false;
            // Play note that corresponds to Z
            }
        else if((keyPress == D_KEY) && (readyFlag)) // button X pressed
            {
                PC.printf("Got an X");
            // Play note that corresponds to X
            }
        else if((keyPress == E_KEY && (readyFlag)){} // button C pressed
            // Play note that corresponds to C
        else if((keyPress == F_KEY) && (readyFlag)){} // button V pressed
            // Play note that corresponds to V
        else if((keyPress == G_KEY) && (readyFlag)){} // button B pressed
            // Play note that corresponds to B
        else if((keyPress == A_KEY) && (readyFlag)){} // button N pressed
            // Play note that corresponds to N
        else if((keyPress == B_KEY) && (readyFlag)){} // button M pressed
            // Play note that corresponds to M
        else if((keyPress == RAISE_OCTAVE_KEY) && (readyFlag)){ // button O pressed
            // Raise an octave
            currentOctave++;
            }
        else if((keyPress == LOWER_OCTAVE_KEY) && (readyFlag)){ // button L pressed
            // Lower an octave
            currentOctave--;
            }
        else if((keyPress == RAISE_ATTACK_KEY) && (readyFlag)){ // button Q pressed
            // Raise Attack Value
            currentAttackVal++;
            }
        else if((keyPress == LOWER_ATTACK_KEY) && (readyFlag)){ // button A pressed
            // Lower Attack Value
            currentAttackVal--;
            }
        else if((keyPress == RAISE_DELAY_KEY) && (readyFlag)){ // button W pressed
            // Raise Delay Value
            currentDelayVal++;
            }
        else if((keyPress == LOWER_DELAY_KEY) && (readyFlag)){ // button S pressed
            // Lower Delay Value
            currentDelayVal--;
            }
        else if((keyPress == RAISE_SUSTAIN_KEY) && (readyFlag)){ // button E pressed
            // Raise Sustain Value
            currentSustainVal++;
            }
        else if((keyPress == LOWER_SUSTAIN_KEY) && (readyFlag)){ // button D pressed
            // Lower Sustain Value
            currentSustainVal--;
            }
        else if((keyPress == RAISE_RELEASE_KEY) && (readyFlag)){ // button R pressed
            // Raise Release Value
            currentReleaseVal++;
            }
        else if((keyPress == LOWER_RELEASE_KEY) && (readyFlag)){ // button F pressed
            // Lower Release Value
            currentReleaseVal--;
            }
        else if((keyPress == CHANGE_WAVESHAPE_UP) && (readyFlag)){ // button T pressed
            // Change waveform shape to next waveform type
            switch(myWave){
                case sine:
                    myWave = square;
                    break;
                case square:
                    myWave = sawtooth;
                    break;
                case sawtooth:
                    myWave = sine;
                    break;
                default:
                break;
                }
            }
        else if((keyPress == CHANGE_WAVESHAPE_DOWN) && (readyFlag)){ // button G pressed
            // Change waveform shape to previous waveform type
            switch(myWave){
                case sine:
                    myWave = sawtooth;
                    break;
                case square:
                    myWave = sine;
                    break;
                case sawtooth:
                    myWave = square;
                    break;
                default:
                break;
                }
            }
        
        }
        //do other tasks in main - interrupts will process button message characters
        myled = 1;
        wait(0.1);
        myled = 0;
        wait(0.1);
    
}