4ledint.c

学林电子实验箱源码 完整板

/*******************************************************************************

*       																					          *
* 4位不带小数点的频率计                                              	       *
*                                                                              *
********************************************************************************
*  51测试网论坛例程                 版权所有转载注明版权连接WWW.8951.com       *
*******************************************************************************/
#include <AT89X51.H>
#include <stdio.h>
int value=0,n=0;
int n,n1,n2,n3,n4;
int LEDData [] = { 0x28, 0x7E, 0xA2, 0x62, 0x74, 0x61, 0x21, 0x7A, 0x20, 0x60};
void delay(short i);
void initial(void);
void display(void);
main ()
{
initial();
   while(1)
   {
      if(n==100)
    {
      display();  
   n=0;
   value=0;
    }
   }
   
}
  void initial(void)//定时器计数器初始化
{
IE=0x8b;
TCON=0x01;
TMOD=0x11;
TH0=0xD8;//T0作为定时器初始化0.01秒中一次断
TL0=0xF0;
TH1=0XFF;//T1产生625HZ
TL1=0X60;
TR0=1;
TR1=1;
}
void delay(short i)
{
     int j=0;
  int k=0;
  k=i*2;
  while(j<k) j++;

}

void extern0_ISR () interrupt 0 //INT0外部脉冲中断
{
  EX0=0;
  value++;
  EX0=1;
}

void timer0_ISR  () interrupt 1  //定时器每0.01秒中断一次T0
  {  
   n++;
    TH0=0xD8;
    TL0=0xF0;


  }
void timer1_ISR  () interrupt 3//T1625hz
{
P1=P1^0xc0;
TH1=0XFF;//T1产生3125HZ
TL1=0X60;
}
void display(void)
{
    
     n4=value/1000;
     n3=(value-n4*1000)/100;
     n2=(value-n4*1000-100*n3)/10;
     n1=value-n4*1000-100*n3-10*n2;
while(1)
   {
  P2=0x3f;
     P0=LEDData [n1];     
  delay(50);
     P2=0x5f;
     P0=LEDData [n2];
  delay(50);
     P2=0x6f;
     P0=LEDData [n3];    
  delay(50);
     P2=0xf7;
     P0=LEDData [n4];  
     delay(50);
  P2=0xff;
    }
}