0809.h

基于AVR单片机的ADC0808模数转换程序.

//ICC-AVR application builder : 2007-8-31 下午 05:03:50
// Target : M8
// Crystal: 4.0000Mhz

#include <macros.h>

#define pindata PIND
#define ddrdata DDRD

void delayms(uint i)
{
uint j;
for(;i!=0;i--)
for(j=4000;j!=0;j--)
;
}

/*ADC0809驱动程序*/
ADC0909(uchar channel)
{
 unsigned long data;
 ddrdata=0x00;
 DDRB|= 0b00000111;
 PORTB&=0b11111000;
 //PORTB|=0b00010000;

 //PORTB&=0b11101111s;

 
 /*
 if(channel<8)
 {
  PORTB|=channel;
  DDRB|=channel;
 }
 else
 {
  while(1)
  PORTB=0xff;
 }
 */
 
 DDRC  =0b00000101;
 //PORTC&=0x00;
 PORTC&=0b11111010;//0809初始化
 //PORTC&=0b11111110;
 PORTC|=0b00000001;
 PORTC&=0b11111110;
 
 while(!(PINC&0b00000010))
 {
  ;
  }
 PORTC|=0b00000100;
 data=pindata;
 PORTC&=0b11111011;
 data=data*10000/255;
 return (data);
}