Mbed OS Ticker

#include <mbed.h>

DigitalOut led(LED1);
Ticker heartbeat_interrupt;

/**
 * @brief Simple heartbeat function.
 */
void heartbeat(){
 led = !led;
}


int main()
{
    heartbeat_interrupt.attach(&heartbeat, 1.0); // the address of the function to be attached (heartbeat) and the interval (1 seconds)

    while(1){
        sleep();
    }

}