频率计.c

51单片机数字频率计程序+1602显示!

#include <AT89X52.H> 

unsigned char code dispbit[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}; 

unsigned char code dispcode[]={0x3f,0x06,0x5b,0x4f,0x66, 

                               0x6d,0x7d,0x07,0x7f,0x6f,0x00,0x40}; 

unsigned char dispbuf[8]={0,0,0,0,0,0,10,10}; 

unsigned char temp[8]; 

unsigned char dispcount; 

unsigned char T0count; 

unsigned char timecount; 

bit flag; 

unsigned long x; 

  

void main(void) 

{ 

  unsigned char i; 

  

  TMOD=0x15; 

  TH0=0; 

  TL0=0; 

  TH1=(65536-4000)/256; 

  TL1=(65536-4000)%256; 

  TR1=1; 

  TR0=1; 

  ET0=1; 

  ET1=1; 

  EA=1; 

  

  while(1) 

   { 

     if(flag==1) 

       { 

         flag=0; 

         x=T0count*65536+TH0*256+TL0; 

         for(i=0;i<8;i++) 

           { 

             temp[i]=0; 

           } 

         i=0; 

         while(x/10) 

           { 

             temp[i]=x%10; 

             x=x/10; 

             i++; 

           } 

         temp[i]=x; 

         for(i=0;i<6;i++) 

           { 

             dispbuf[i]=temp[i]; 

           } 

         timecount=0; 

         T0count=0; 

         TH0=0; 

         TL0=0; 

         TR0=1; 

       } 

   } 

} 

  

void t0(void) interrupt 1 using 0 

{ 

  T0count++; 

} 

  

void t1(void) interrupt 3 using 0 

{ 

  TH1=(65536-4000)/256; 

  TL1=(65536-4000)%256; 

  timecount++; 

  if(timecount==250) 

    { 

      TR0=0; 

      timecount=0; 

      flag=1; 

    } 

  P0=dispcode[dispbuf[dispcount]]; 

  P2=dispbit[dispcount]; 

  dispcount++; 

  if(dispcount==8) 

    { 

      dispcount=0; 

    } 

}