STC89C52单片机实验1-点亮一个发光二极管

/*--------------------------------------------------------------------------
REG51.H

Header file for generic 80C51 and 80C31 microcontroller.
Copyright (c) 1988-2002 Keil Elektronik GmbH and Keil Software, Inc.
All rights reserved.
--------------------------------------------------------------------------*/

#ifndef __REG51_H__
#define __REG51_H__

/*  BYTE Register  */
sfr P0   = 0x80;
sfr P1   = 0x90;
sfr P2   = 0xA0;
sfr P3   = 0xB0;
sfr PSW  = 0xD0;
sfr ACC  = 0xE0;
sfr B    = 0xF0;
sfr SP   = 0x81;
sfr DPL  = 0x82;
sfr DPH  = 0x83;
sfr PCON = 0x87;
sfr TCON = 0x88;
sfr TMOD = 0x89;
sfr TL0  = 0x8A;
sfr TL1  = 0x8B;
sfr TH0  = 0x8C;
sfr TH1  = 0x8D;
sfr IE   = 0xA8;
sfr IP   = 0xB8;
sfr SCON = 0x98;
sfr SBUF = 0x99;


/*  BIT Register  */
/*  PSW   */
sbit CY   = 0xD7;
sbit AC   = 0xD6;
sbit F0   = 0xD5;
sbit RS1  = 0xD4;
sbit RS0  = 0xD3;
sbit OV   = 0xD2;
sbit P    = 0xD0;

/*  TCON  */
sbit TF1  = 0x8F;
sbit TR1  = 0x8E;
sbit TF0  = 0x8D;
sbit TR0  = 0x8C;
sbit IE1  = 0x8B;
sbit IT1  = 0x8A;
sbit IE0  = 0x89;
sbit IT0  = 0x88;

/*  IE   */
sbit EA   = 0xAF;
sbit ES   = 0xAC;
sbit ET1  = 0xAB;
sbit EX1  = 0xAA;
sbit ET0  = 0xA9;
sbit EX0  = 0xA8;

/*  IP   */ 
sbit PS   = 0xBC;
sbit PT1  = 0xBB;
sbit PX1  = 0xBA;
sbit PT0  = 0xB9;
sbit PX0  = 0xB8;

/*  P3  */
sbit RD   = 0xB7;
sbit WR   = 0xB6;
sbit T1   = 0xB5;
sbit T0   = 0xB4;
sbit INT1 = 0xB3;
sbit INT0 = 0xB2;
sbit TXD  = 0xB1;
sbit RXD  = 0xB0;

/*  SCON  */
sbit SM0  = 0x9F;
sbit SM1  = 0x9E;
sbit SM2  = 0x9D;
sbit REN  = 0x9C;
sbit TB8  = 0x9B;
sbit RB8  = 0x9A;
sbit TI   = 0x99;
sbit RI   = 0x98;

#endif
/*********************************************************************************
* 【编写时间】: 2014年3月5日
* 【作    者】: 清翔电子:03
* 【版    本】: 1.0
* 【网    站】: http://www.qxmcu.com/ 
* 【淘宝店铺】: http://qxmcu.taobao.com/ 
* 【实验平台】: QX-MCS51 单片机开发板
* 【外部晶振】: 11.0592mhz    
* 【主控芯片】: STC89C52
* 【编译环境】: Keil μVisio3  
* 【程序功能】: 点亮一个发光二极管                                                 
* 【使用说明】: 
*  说明:免费开源,不提供源代码分析.
**********************************************************************************/

#include  //包含头文件,在“reg51.h”上右键单击,并打开,可以看到它里面的定义
                   //当然也可以改成 reg52.h  STC.H 功能一样的,只是定义的IO口有一点区别,51单片机可以通用。
sbit led=P1^0;  //定义一个LED 为P1.0 IO口

void main()     //C语言主函数
{  
    led=0;   //单片机IO P1.0脚输出一个低电平,点亮发光管。 高电平为5V 低电平为0。
    while(1);
}

你可能感兴趣的:(硬件&驱动)