test1.c

D:MyData其它我的文章C51cp1_1 est.uv2 Project File Date: 04/02/2003

#include <AT89X51.H>
#include <stdio.h>

void main(void)
{
	SCON = 0x50; //串口方式1,允许接收
	TMOD = 0x20; //定时器1定时方式2
	TCON = 0x40; //设定时器1开始计数
	TH1 = 0xE8;	//11.0592MHz 1200波特率
	TL1 = 0xE8;
	TI = 1;
	TR1 = 1; //启动定时器

	
	while(1)
		{
			printf ("Hello World!\n"); //当P1.1为低时显示Hello World
		}
}