ads1100.c

本人开发的测量水的浊度的仪器

#define ADS1100_C
#include "common.h"
#include "ads1100.h"
#include "intrins.h"
#include "stdio.h"
#include "system.h"

#define nops(); _nop_(); _nop_(); _nop_(); _nop_();

void startads1100()
{
	EA = 0;
	ADS1100_SDA = 1;
	ADS1100_SCL = 1;
	nops();
	ADS1100_SDA = 0;
	nops();
	ADS1100_SCL = 0;
	EA = 1;
}

void stopads1100()
{
	EA = 0;
	ADS1100_SCL = 0;
	ADS1100_SDA = 0;
	ADS1100_SCL = 1;
	nops();
	ADS1100_SDA = 1;
	nops();
	ADS1100_SCL = 0;
	EA = 1;
}

void ackads1100()
{
	EA = 0;
	ADS1100_SCL = 0;
	ADS1100_SDA = 0;
	nops();
	ADS1100_SCL = 1;
	nops();
	ADS1100_SCL = 0;
	nops();
	EA = 1;
}
/*
void noackads1100()
{
	ADS1100_SDA = 1;
	nops();
	ADS1100_SCL = 0;
	nops();
	ADS1100_SCL = 1;
	nops();
	ADS1100_SCL = 0;
	nops();
}
*/
uchar waitackads1100()
{
	uchar i=255;

	EA = 0;
	ADS1100_SDA = 1;
	while(i--)
	{
		nops();
		if(ADS1100_SDA == 0)
		{
			ADS1100_SCL = 0;
			nops();
			ADS1100_SCL = 1;
			nops();
			ADS1100_SCL = 0;
			nops();
			return 1;
		}
	}
	
	stopads1100();
	EA = 1;

	return 0;
}

void clockoutads1100(uchar dat)
{
	uchar i;

	EA = 0;

	for(i=0;i<8;i++)
	{
		ADS1100_SCL = 0;
		nops();

		if(dat &0x80)
			ADS1100_SDA = 1;
	    	else
			ADS1100_SDA = 0;
		dat <<= 1;

		ADS1100_SCL = 1;
		nops();

		ADS1100_SCL = 0;
		nops();
	}

	EA = 1;
}

uchar clockinads1100()
{
	uchar i;
	uchar c = 0;
	EA = 0;

	for(i=0;i<8;i++)
	{
		c <<= 1;

		ADS1100_SCL = 0;
		nops();

		ADS1100_SCL = 1;
		nops();

		ADS1100_SDA = 1;
		if(ADS1100_SDA == 1)
			c |= 0x01;

		ADS1100_SCL = 0;
		nops();
	}

	EA = 1;

	return c;
}

uchar readads1100(ushort *pdat)
{
	uchar c1,c2;

	EA = 0;

	startads1100();

	//device address
	clockoutads1100(0x9f);
	if(!waitackads1100()) return 0;

	//read data
	c1 = clockinads1100();
	ackads1100();
	c2 = clockinads1100();
	ackads1100();
	
	stopads1100();

	*pdat = c1*256+c2;

	EA = 1;

	return 1;
}

/*
uchar readads1100(uchar addr,uchar *pdat)
{
	uchar c;

	startads1100();

	//device address
	c = 0x9e;
	clockoutads1100(c);
	if(!waitackads1100()) return 0;

	//memory address
	c = addr;
	clockoutads1100(c);
	if(!waitackads1100()) return 0;

	startads1100();

	//device address
	c = 0x9f;
	clockoutads1100(c);
	if(!waitackads1100()) return 0;

	//read data
	*pdat = clockinads1100();

	noackads1100();

	stopads1100();

	return 1;
}
*/
uchar writeads1100(uchar dat)
{
	EA = 0;

	startads1100();

//device address
	clockoutads1100(0x9e);
	if(!waitackads1100()) return 0;

//memory address
//	c = addr;
//	clockoutads1100(c);
//	if(!waitackads1100()) return 0;

//write data
	clockoutads1100(dat);
	if(!waitackads1100()) return 0;

	stopads1100();

	EA = 1;

	return 1;
}

uchar resetads1100()
{
	EA = 0;

	startads1100();

//device address
	clockoutads1100(0x00);
	if(!waitackads1100()) return 0;

//write data
	clockoutads1100(0x06);
	if(!waitackads1100()) return 0;

	stopads1100();

	EA = 1;

	return 1;
}