回调函数的使用示例

/*** 开发环境：Microsoft Visual Studio 2016 专业版* 开发作者：Jack Ming* 联系方式：1097****4388* 文档说明：回调函数使用例子*/#include "windows.h"#include "stdio.h"/*** 模块消息传递*/struct message{void * pbuff;int size;};/*** 定义回调函数*/typedef void(*led_blink)(struct message * p_message);/*** LED模块*/void LED_Blink(struct message * p_message){int key_info[3];/* 获取key1按键信息 */key_info[0] = ((int *)p_message)[0];if (key_info[0] == 1){printf("我亮了...\r\n");}}/*** key模块*/void key_scan(led_blink LED_Blink){struct message message;int key_info[3] = {0};int key1 = 0, key2 = 0, key3 = 0; /* 键值 */int down = 1, up = 0;             /* 键状态 *///key1 = GPIO_ReadBit(GPIOA,Pin1);/* key1按下，led1闪烁 */if (key1 == down){key_info[0] = 1; /* key1被按下 */message.pbuff = key_info;message.size = 3;LED_Blink(&message); /* 通知led */}/* key2按下，电机转动 */}int main(void){while (1){key_scan(LED_Blink);}system("pause");}