1 /*
2  * Copyright (c) 2006-2021, RT-Thread Development Team
3  *
4  * SPDX-License-Identifier: Apache-2.0
5  *
6  * Change Logs:
7  * Date           Author       Notes
8  * 2020-06-05     thread-liu   first version
9  */
10 
11 #include <rtthread.h>
12 #include <board.h>
13 
14 /* defined the LD4 pin: PD8 */
15 #define LED4_PIN    GET_PIN(D, 8)
16 
main(void)17 int main(void)
18 {
19     /* set LD8 pin mode to output */
20     rt_pin_mode(LED4_PIN, PIN_MODE_OUTPUT);
21 
22     while (1)
23     {
24         rt_pin_write(LED4_PIN, PIN_HIGH);
25         rt_thread_mdelay(500);
26         rt_pin_write(LED4_PIN, PIN_LOW);
27         rt_thread_mdelay(500);
28     }
29 }
30