timer.c

来自「这是一称的项目原文件,包括T9汉字输入,打印机,24C512,已经引用到产品上」· C语言 代码 · 共 55 行

#include<reg51.h>       //定时
#include<absacc.h>
#include<timer.h>

WORD count_timer1;                          //定时器记数变量
WORD count_timer0;

void timer1_init(WORD time_var)
{
  //P1=0x0f; 
  count_timer1 = time_var;

  EA=0;                                     //总中断  

  ET1 = 1;                                  //中断控制位，允许中断
  TMOD= (TMOD|0x10);                             //工作方式一
  TH1=(65535-10000)>>8;                     //12Mhz,10ms
  TL1=(65535-10000)&0xff;
  TR1=1;                                    //TRO为T0的运行控制位，允许脉冲进入，TF为脉冲计数满标志
  EA = 1;
}

void timer1(void)  interrupt 3 using 2
{
  TH1=(65535-10000)>>8; 
  TL1=(65535-10000)&0xff;
  TF1 = 0;                                 //clear the full flag
  if(count_timer1) count_timer1--;         //计时变量
}



void timer0_init(WORD time_var)
{
  //P1=0x0f; 
  count_timer0 = time_var;

  EA=0;                                    //总中断  

  ET0 = 1;                                 //中断控制位，允许中断
  TMOD= (TMOD|0x01);                       //工作方式一
  TH0=(65535-10000)>>8;                    //12Mhz,10ms
  TL0=(65535-10000)&0xff;
  TR0=1;                                   //TRO为T0的运行控制位，允许脉冲进入，TF为脉冲计数满标志
  EA = 1;
}

void timer0(void)  interrupt 1 using 3
{
  TH0=(65535-10000)>>8; 
  TL0=(65535-10000)&0xff;
  TF0 = 0;                                 //clear the full flag
  if(count_timer0) count_timer0--;         //计时变量
}