adc0808.txt

adc0808的有个应用

#include <AT89X52.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}; 

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

unsigned char dispcount; 

unsigned char getdata; 

unsigned int temp; 

unsigned char i; 


sbit ST=P3^0; 

sbit OE=P3^1; 

sbit EOC=P3^2; 

sbit CLK=P3^3; 


void main(void) 

{ 

ST=0; 

OE=0; 

ET0=1; 

ET1=1; 

EA=1; 

TMOD=0x12; 

TH0=216; 

TL0=216; 

TH1=(65536-4000)/256; 

TL1=(65536-4000)%256; 

TR1=1; 

TR0=1; 

ST=1; 

ST=0; 

while(1) 

{ 

if(EOC==1) 

{ 

OE=1; 

getdata=P0; 

OE=0; 

temp=getdata*235; 

temp=temp/128; 

i=5; 

dispbuf[0]=10; 

dispbuf[1]=10; 

dispbuf[2]=10; 

dispbuf[3]=10; 

dispbuf[4]=10; 

dispbuf[5]=0; 

dispbuf[6]=0; 

dispbuf[7]=0; 

while(temp/10) 

{ 

dispbuf[i]=temp%10; 

temp=temp/10; 

i++; 

} 

dispbuf[i]=temp; 

ST=1; 

ST=0; 

} 

} 

} 


void t0(void) interrupt 1 using 0 

{ 

CLK=~CLK; 

} 


void t1(void) interrupt 3 using 0 

{ 

TH1=(65536-4000)/256; 

TL1=(65536-4000)%256; 

P1=dispcode[dispbuf[dispcount]]; 

P2=dispbitcode[dispcount]; 

if(dispcount==7) 

{ 

P1=P1 | 0x80; 

} 

dispcount++; 

if(dispcount==8) 

{ 

dispcount=0; 

} 

}