ad0832.c

单片机源程序精华包

#include "reg52.h"
sbit  CS  = 0xa0;
sbit  Clk = 0xa1;
sbit  DO1  = 0xa2;
sbit  DI  = 0xa3;
/*
void Delay_xMs(unsigned int xMs);
void Hc164(unsigned char  temp );
void LCD_Init( void );
void Clear_H_LCD(unsigned char H);
void Show_XW_LCD(unsigned char xPos,unsigned char yPos,unsigned char sData);
void Print_LCD (  unsigned char xPos, unsigned char yPos,int nSentenceID );
*/
/*---------------------------------------------------
功能:根据CH=0采集通道1CH=1采集通道2
--------------------------------------------------*/
unsigned char A_D(bit CH)
{
	unsigned char i;
	unsigned char Temp1,Temp2;

	CS  = 0;
	Clk = 0;
	Clk = 1;
	DI  = 1;

	if ( CH == 0 )	//0选择CH0  1选择CH1
	{
		Clk = 0;
		Clk = 1;
		DI  = 1;

		Clk = 0;
		Clk = 1;
		DI  = 0;
	}
	else
	{
		Clk = 0;
		Clk = 1;
		DI  = 1;

		Clk = 0;
		Clk = 1;
		DI  = 1;
	}

	Clk = 1;
	Clk = 0;

	for( i = 0;i < 8;i++ )
	{
		Clk = 1;
		Clk = 0;
		Temp1 = (Temp1<<1) | DO1;		
	}

	if ( DO1 )
		Temp2 = Temp2 | 0x80;
	else
		Temp2 = Temp2 | 0x00;	

	for( i = 0;i < 7;i++ )
	{
		Clk = 1;
		Clk = 0;
		if ( DO1 )
			Temp2 = (Temp2>>1) | 0x80;
		else
			Temp2 = (Temp2>>1) | 0x00;		
	}

	CS = 1;
	return(Temp2);					//返回采样值
}
/*---------------------------------------------------
功能：将00-FF采样的值转换成温度值
--------------------------------------------------*/
unsigned char T2S(unsigned char dat)
{
	
	return(((85 - dat/3 + 20)/10*16)+((85 - dat/3 + 20)%10));	
}