/*#############################################################

Program Name    : ex2_timer_interrupt
Author          : Grant Phillips
Date Modified   : 16/01/2016
Compiler        : ARMmbed
Tested On       : STM32F4-Discovery

Description     : Example program to demonstrate the use of the
                  Ticker class to generate a timer interrupt
                  repeatedly.     

Requirements    : * STM32F4-Discovery Board
              
Circuit         : * a pushbutton connected to PA0 (user button)
                  * LEDs connected to PD13 and PD15

##############################################################*/

#include "mbed.h" 

DigitalIn button(PA_0);
DigitalOut orangeled(PD_13);
DigitalOut blueled(PD_15);
Ticker t;

void toggleroutine() {
    blueled = !blueled;
}

int main() {   
    t.attach(&toggleroutine, 0.2);  //call toggleroutine every 0.2 seconds (200ms)
    while(1) {
        while(button == 1) {
            //do nothing
            //when button is pressed, the code will get stuck in this loop
            //and the orange led will stop flashing, but the toggleroutine 
            //will still run due to the timer interrupt
        }
        orangeled = !orangeled;
        wait(0.5);
    }
}