定时器1.c

来自「51单片机开发板提供的参考程序」· C语言 代码 · 共 40 行

  
/*copyright 2007,ShangHai  HaoTun Electronic Technology co.,Ltd
 *
 *This sample is used for Timer1 16bit timer mode.
 *
 *write by Shifang 2007-4-23
 *
 *V1.1
 */
#include<reg52.h>


sbit LED=P1^2;


void Init_Timer1(void)
{
 TMOD |= 0x10;			     
 TH1=0x00;	              	/* Init value */
 TL1=0x00;
 EA=1;                      /* interupt enable */
 ET1=1;                     /* enable timer1 interrupt */
 TR1=1;  
}

main()
{
 Init_Timer1();
 while(1);
}

void Timer1_isr(void) interrupt 3 using 1
{
 TH1=0x00;		/* Init value */
 TL1=0x00;

 LED=~LED;

}