/* defined the LED1 pin: PD13 */#define LED1_PIN GET_PIN(D, 13)intmain(void){intcount=1;/* set LED1 pin mode to output */rt_pin_mode(LED1_PIN,PIN_MODE_OUTPUT);while(count++){rt_pin_write(LED1_PIN,PIN_HIGH);rt_thread_mdelay(500);rt_pin_write(LED1_PIN,PIN_LOW);rt_thread_mdelay(500);}returnRT_EOK;}