water_good.c

ti的12位AD采集c实现

#include<reg52.h>
#include "adc.h"
#include<INTRINS.H>
#include <stdio.h>
#define uchar unsigned char
#define uint unsigned int
#define ushort unsigned short

sbit EOC = P1^3;
sbit CLK = P1^4;
sbit DIN = P1^5;
sbit DOUT = P1^6;
sbit CS = P1^7;
sbit TURN_CLK=P1^0;
sbit TURN_UCLK=P1^1;

sbit adjust_20=P2^0;
sbit adjust_30=P2^1;
sbit adjust_40=P2^2;


unsigned long idata  sys_timer=0;
float idata voltage_con;
float idata voltage_moto;

uint idata voltage_con1;
uint idata voltage_moto1;
uchar idata voltage_adjust;


void adc_init(void);
float adc_voltage(int channel);
float adc_value(int channel);
float voltage_avrg(int channel);
void  delay(void);
void  adjust_init(void);


void  adjust_init(void)
{
	if(adjust_20==0)
		voltage_adjust=20;
	else
	if (adjust_30==0)
		voltage_adjust=30;
	else   
		voltage_adjust=40;
}





void adc_init(void)
{
	CS = 1;
	CLK = 0;
}

float  adc_voltage(int channel)
{	
	float r;
	switch(channel)
		{
		case 1:r = adc_value(channel); r= r;return r;// 测量的值放大10 倍
		case 0:r = adc_value(channel); r= r;return r;		
		default:return 0;
		}
}

float adc_value(int channel)
{
	int i;
	uchar d;
	ushort r;

	d = (((unsigned char)channel)<<4)+0x02;
	CS = 0;
	for(i=0;i<12;i++)
		{
		if(i<8)
			{
			if( d&(1<<(7-i))) DIN = 1;else DIN=0;
			}
		else
			DIN = 0;
		CLK = 1;
		CLK = 0;
		}
	DIN = 0;
	while(EOC==0);

	r = 0;
	for(i=0;i<12;i++)
		{
		CLK = 1;
		if(DOUT)r|=(1<<i);
		CLK = 0;
		}
	CS = 1;
	return (float)r*5/4095.0;
}

float voltage_avrg(int channel)
{
		
	static float  idata r_temp;
		char idata i;
		r_temp=0;
	for(i=0;i<10;i++)
		r_temp=r_temp+adc_voltage(channel);
		r_temp=r_temp/10;
	return	r_temp;
		
}

void delay(void)
{  int idata i;
	for(i=0;i<9000;i++);
}


void main(void)
{
	/*TURN_CLK=0;   //u_clock
	TURN_CLK=1;
	
	TURN_UCLK=0; //   clock
	TURN_UCLK=1;
	
	TURN_CLK=0;
	TURN_CLK=1;
	
	TURN_UCLK=0;
	TURN_UCLK=1; */
	
	TURN_UCLK=1;
	TURN_CLK=1;
	adjust_init();
	adc_init(); 
	while(1)
	{
	voltage_con= voltage_avrg(0); // control voltage
	voltage_moto= voltage_avrg(1); // moto voltage 
	delay();
	voltage_con1=(uint) (voltage_con*100);
	voltage_moto1=(uint) (voltage_moto*100);
	delay();
	if((voltage_moto1-voltage_adjust)<voltage_con1<(voltage_moto1+voltage_adjust)) //30  1ma voltage_adjust
	     {	
	     	TURN_UCLK=1;
	     	TURN_CLK=1;
	     }	
	  else
	    if(voltage_con1<(voltage_moto1-voltage_adjust))
	    {
	    	TURN_CLK=1;
	    	TURN_UCLK=0;
	    	}
	    else 
	    {
	    	TURN_UCLK=1;
	     	TURN_CLK=0;
	    }
		
	
		 
	}
	
}