at89s51.c

数字温度计

#include <AT89X52.H> 

#include <ctype.h> 

unsigned char code dispbitcode[]={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]={10,10,10,10,10,10,0,0}; 

unsigned char dispcount; 

unsigned char getdata; 

unsigned long temp; 

unsigned char i; 

bit sflag; 

sbit ST=P3^0; 

sbit OE=P3^1; 

sbit EOC=P3^2; 

sbit CLK=P3^3; 

sbit LED1=P3^6; 

sbit LED2=P3^7; 

sbit SPK=P3^5; 

void main(void) 

{ 

  ST=0; 

  OE=0; 

  TMOD=0x12; 

  TH0=0x216; 

  TL0=0x216; 

  TH1=(65536-4000)/256; 

  TL1=(65536-4000)%256; 

  TR1=1; 

  TR0=1; 

  ET0=1; 

  ET1=1; 

  EA=1; 

  ST=1;    

  ST=0; 

  getdata=148; 

  while(1) 

    { 

      ; 

    } 

}  

void t0(void) interrupt 1 using 0 

{ 

  CLK=~CLK; 

} 

void t1(void) interrupt 3 using 0 

{   

  TH1=(65536-4000)/256; 

  TL1=(65536-4000)%256;   

  if(EOC==1) 

   { 

     OE=1; 

     getdata=P0; 

     OE=0; 

     temp=(getdata*2350); 

     temp=temp/128; 

     if(temp<2732) 

       { 

         temp=2732-temp; 

         sflag=1; 

       } 

       else 

         { 

           temp=temp-2732; 

           sflag=0; 

         } 

     i=3; 

     dispbuf[0]=10; 

     dispbuf[1]=10; 

     dispbuf[2]=10; 

     if(sflag==1) 

       { 

         dispbuf[7]=11; 

       } 

       else 

         { 

           dispbuf[7]=10; 

         } 

     dispbuf[3]=0; 

     dispbuf[4]=0; 

     dispbuf[5]=0; 

     dispbuf[6]=0; 

    while(temp/10) 

      { 

        dispbuf[i]=temp%10; 

        temp=temp/10; 

        i++; 

      } 

    dispbuf[i]=temp;          

     ST=1; 

     ST=0; 

   } 

  P1=dispcode[dispbuf[dispcount]]; 

  P2=dispbitcode[dispcount]; 

  dispcount++; 

  if(dispcount==8) 

    { 

      dispcount=0; 

    } 

}