File content as of revision 3:3946e355bcab:

#include "mbed.h"
#include "C12832.h"
Serial pc(USBTX, USBRX); // tx, rx
InterruptIn joystickcenter(p14);
InterruptIn wire(p9);
DigitalOut led(LED1);
DigitalOut flash(LED4);
C12832 lcd(p5,p7,p6,p8,p11);
int i;
void flip()
{
    led = !led; // toggles the LED1 when the joystick button is pressed.
    i=1;
}
int main()
{
    joystickcenter.rise(&flip); // attach the function address to the rising edge
    wire.mode(PullUp); // With this, no external pullup resistor needed
    wire.rise(&flip); // attach the function address to the rising edge
    while(1) { // wait around, interrupts will interrupt this!

        flash = !flash; // turns LED4 on if off, off if on
        wait(0.5); // the instruction to wait for half-second
        if(i==1) {
            lcd.locate(0,0);
            lcd.printf("button press detected\n\r");
            lcd.printf("LED1\n\r");
            i=0;
        }               
    }
}