Mbed OS Thread

//#define FORCESLEEP

#include <mbed.h>
DigitalOut led(LED1);

/**
 * @brief Simple heartbeat function.
 */
void heartbeat(){
 while(true){
    led = !led;
    Thread::wait(1000);
 }
}


int main()
{
    Thread heartbeat_thread;
    heartbeat_thread.start(heartbeat);

    #if defined FORCESLEEP
    while(true){
        sleep();
    }
    #else
        Thread::wait(osWaitForever);
    #endif

}