main.c

来自「从零开始学51单片机源代码」· C语言 代码 · 共 41 行

//main.c
#include <reg51.h>	//包含头文件

 //定义端口寄存器
sfr P0M0 = 0X93;
sfr P0M1 = 0X94;
sfr P1M0 = 0X91;
sfr P1M1 = 0X92;
sfr P2M0 = 0X95;
sfr P2M1 = 0X96;  
sfr P3M0 = 0Xb1;
sfr P3M1 = 0Xb2;    

//定义端口 
sbit led0 = P1^0;

//定义延时函数
void ms_delay(unsigned int t)
{
	unsigned  int  i;
	for (t; t > 0; t--)	//外层循环t次	 
		for (i = 110;i > 0; i--)	//内层循环110次		   
		;
}  

main()
{
	//配置端口模式 
	P1M1 = 0x00;
	P1M0 = 0x00;

	

	while(1)
	{
	 	led0 = 0;	//点亮led
		ms_delay(500);
		led0 = 1;	//关闭led						
		ms_delay(500);
	}
}