hello.c

定时器设置

/*------------------------------------------------------------------------------
HELLO.C

Copyright 1995-2005 Keil Software, Inc.
------------------------------------------------------------------------------*/

#include <REG52.H>                /* special function register declarations   */
/* for the intended 8051 derivative         */

#include <stdio.h>                /* prototype declarations for I/O functions */
#include <stdlib.h>                      /* standard library .h-file          */
#include <ctype.h>                       /* character functions               */
#include <intrins.h>

#ifdef MONITOR51                         /* Debugging with Monitor-51 needs   */
char code reserve [3] _at_ 0x23;         /* space for serial interrupt if     */
#endif                                   /* Stop Exection with Serial Intr.   */



//定义按健
sbit K1 = P3^4;
sbit K2 = P3^5;

sbit LED = P1^0;

sbit P12MOTO=P1^2;

sbit P33=P3^3;


 unsigned char one=0;

//延时
void delay(unsigned char n)
{	 
 while(n--);

}

void timer3(void)interrupt 3
 {
	 TH1=0x0;
	 TL1=0x0;
	 TF1=0;
	 if(one>200)
	 {
	  	LED=!LED;
		one=0;
	 }
	else
	    one++;
	
 }

//  void timer0(void)interrupt 0
// {
//	 TH1=0x0;
//	 TL1=0x0;
//	 //TF1=0;
//	 if(one>200)
//	 {
//	  	LED=!LED;
//		one=0;
//	 }
//	else
//	    one++;
//	
// }
//
//
// void timer1(void)interrupt 1
// {
//	 TH1=0x0;
//	 TL1=0x0;
//	 TF1=0;
//	 if(one>200)
//	 {
//	  	LED=!LED;
//		one=0;
//	 }
//	else
//	    one++;
//	
// }
//
// 
// void timer2(void)interrupt 2
// {
//	 TH1=0x0;
//	 TL1=0x0;
//	 TF1=0;
//	 if(one>200)
//	 {
//	  	LED=!LED;
//		one=0;
//	 }
//	else
//	    one++;
//	
// } 


/*------------------------------------------------
The main C function.  Program execution starts
here after stack initialization.
------------------------------------------------*/
void main (void) {

	unsigned int i;  


#ifndef MONITOR51
	SCON  = 0x50;		        /* SCON: mode 1, 8-bit UART, enable rcvr  101 0000    */
	RCAP2H = 0xFF;
	TH2   = 0xff;                
	RCAP2L =0xBF;
	TL2  =  0xFB;
	T2CON = 0x34;			    //0011 0100
	//TR1   = 1;                  /* TR1:  timer 1 run                          */
	TI    = 1;                  /* TI:   set TI to send first char of UART    */
	ES  =0;
	//EA =1;


   // IE=0xff;		//开所有中断
//	IP=0x10;

#endif


	/*------------------------------------------------
	Note that an embedded program never exits (because
	there is no operating system to return to).  It
	must loop and execute forever.
	------------------------------------------------*/
		

	//
	TMOD =0x00;						  //工作方式0
	TH1=0;
	TL1=0;
	IE1=1;							  //中断
//
//
	EA=1;							  //开放总中断
	ET1=1;							  //充许定时器溢出中断
//	
	TR1=1;							   //运行



//   TMOD =0x01;
//   TH0=0x0;
//   TL0=0x0;
//   EA=1;
//   ET0=1;
//   TR0=1;

	//设置
	K1=1;
	K2=1;
	LED =1;	
//	delay(1);


	for(;;)
	{
	  delay(1);
	}



	
}