main.c

从零开始学51单片机源代码

#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;

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

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