ad7714.c

51编写的AD7714的测试程序

#include<reg51.h>
#include<stdio.h>

sbit ADCLK = P1^0;
sbit ADCS  = P1^1;
sbit ADDRDY= P1^2;
sbit ADDOUT= P1^3;
sbit ADDIN = P1^4;


void delay(unsigned int k)
{
      unsigned int i=0;
      for(i=0;i<k;i++){;}
}

void WriteTo_adc(unsigned char byte)
{
unsigned char  token,i;
token=0x80;
ADCLK=0;
ADCS=0;
for(i=0;i<8;i++)
{
//ADCLK=0;
if(byte&token)ADDIN=1;
else  ADDIN=0;
ADCLK=0;
ADCLK=1;
token=token>>1;
}
ADCLK=0;ADDIN=1;ADCS=1;
}

unsigned long Read_adc(void)
{
unsigned long temp;
unsigned char i;
while(ADDRDY==1){delay(10);}
WriteTo_adc(0x5c);
ADCLK=0;ADCS=0;
temp=0;
for(i=0;i<24;i++)
{
temp = temp << 1;
ADCLK=1;
temp=(temp|ADDOUT);
ADCLK=0;
}
ADCLK=0;
ADCS=1;
return(temp);
}

void init()
{
WriteTo_adc(0x24);
WriteTo_adc(0x4f);
WriteTo_adc(0x34);
WriteTo_adc(0x0a0);
WriteTo_adc(0x14);
WriteTo_adc(0x20);
delay(1000);
}

void main()
{
	unsigned long addata=0;
	//float volt;
	init();
	delay(10);
	while(1)
	{  
   //   WriteTo_adc(0x5c);
		addata = Read_adc();

	}
}