#include <reg52.h>
#include "../iic/iic.h"
unsigned char AD_read()
{
unsigned char temp;
iic_start();
iic_send_byte(0x90);
if(0 == ack)
{
return ERR;
}
iic_send_byte(0x40); //設置通道和工作方式
if(0 == ack)
{
return ERR;
}
iic_start();
iic_send_byte(0x90 + 1);
if(0 == ack)
{
return ERR;
}
temp = iic_receive_byte();
iic_noack();
iic_stop();
return temp;
}
unsigned char DA_write(unsigned char num)
{
iic_start();
iic_send_byte(0x90);
if(0 == ack)
{
return ERR;
}
iic_send_byte(0x40);
if(0 == ack)
{
return ERR;
}
iic_send_byte(num);
if(0 == ack)
{
return ERR;
}
iic_stop();
return SUCC;
}
#ifndef _ADDA_H_
#define _ADDA_H_
#define ERR 0
#define SUCC 1
extern unsigned char AD_read();
extern unsigned char DA_write(unsigned char num);
#endif