ad7982.c

AD7982模数转换程序

#include<stdio.h>
#include<aduc841.h>
/******************************************************************
DEFINE CONTROL PINS OF ADUC841 FOR THE PURPOSE OF AD7982 CONTROL.
Customers should define the pins according to their design.
******************************************************************/
sbit SCK=0x0A3;
sbit CNV=0x0A0;
sbit SDO=0x0A2;
sbit SDI=0x0A1;

unsigned char DataRead[3];

void ReadData(unsigned char nByte);
void Delay(unsigned int Time)                 
{

	while(Time)
	{
		Time--;
	}
}


void main()
{

	/* Set up UART */
	T3CON = 0x086;
	T3FD = 0x08;
	SCON = 0x052;
	

	SDI=1;
	SDO=1;
	SCK=0;          
	while(1)         // CS Mode,3-Wire Without Busy Indicator
	{
	CNV=0;
	Delay(30);
	CNV=1;
	Delay(3000);
	CNV=0;
		

	ReadData(3);        
	printf("Data: %02BX %02BX %02BX\r\n", DataRead[0],DataRead[1],DataRead[2]);

	}
}
void ReadData(unsigned char nByte)  // nByte is the number of bytes which need to be read
{
	int i,j,l;
   	unsigned char temp;

	temp=0;

	for(i=0; i<nByte; i++)
	{
		if (i==0)l=2;              
		for(j=0; j<l; j++)
	    {
	     	SCK=0;
			Delay(50);
	        SCK=1;
			if(SDO==0)
	     	{
				temp=temp<<1;		 	
			}
			else
		 	{
				temp=temp<<1;
		 		temp=temp+0x01;
			}
			Delay(50);
		  }
		  l=8;
		  DataRead[i]=temp;
		  temp=0;
	}
	SCK=0;

}