cral/ds1624/ds1624.cpp

extern "C" {
	#include <Wire/Wire.h>
}

#include "ds1624.h"

DS1624::DS1624()
{
#ifdef WIRE_LIB_SCAN_MOD
	/*if (!Wire.isStarted())*/ Wire.begin();
#else
	Wire.begin();
#endif
}

DS1624 TEMP = DS1624();

void DS1624::Init(void)
{
	Wire.beginTransmission(DS1624_ADDR);
	Wire.send(DS1624_CONFIG_ADDR);
	Wire.send(DS1624_CONFIGS);
	Wire.endTransmission();
	
	delay(5);
	
	if (DS1624_CONFIGS == DS1624_CONFIG_CONT) {
		startConversion();
	}
}

void DS1624::startConversion(void)
{
	Wire.beginTransmission(DS1624_ADDR);
	Wire.send(DS1624_SMPL_START);
	Wire.endTransmission();
	
#ifdef DS1624_HANDLE_BOOT_DELAY
	delay(1000);
#endif
}

void DS1624::stopConversion(void)
{
	Wire.beginTransmission(DS1624_ADDR);
	Wire.send(DS1624_SMPL_STOP);
	Wire.endTransmission();
}

uint16_t DS1624::readTemp(void)
{
	uint16_t res = 0;
	Wire.beginTransmission(DS1624_ADDR);
	Wire.send(DS1624_READ_TEMP);
	Wire.endTransmission();
	
	delay(5);
	
	Wire.requestFrom(DS1624_ADDR, 2);
	
	while (!Wire.available());
	
	res = (uint8_t) (Wire.receive())<<8;
	
	while (!Wire.available());
	
	res |= (uint8_t) Wire.receive();
	
	return res;
}

#ifdef DS1624_USE_EEPROM
void DS1624::writeData(uint8_t *data)
{
	writeData(data, DS1624_EEPROM_SIZE, 0);
}

void DS1624::writeData(uint8_t *data, uint8_t dataLength)
{
	writeData(data, dataLength, 0);
}

void DS1624::writeData(uint8_t *data, uint8_t dataLength, uint8_t memoryPosition)
{
	// We can only write one page at a time!
	if (memoryPosition%DS1624_EEPROM_PAGE != 0) return;
	
	// Make sure we don't overlap
	if (dataLength == 0 || dataLength > (DS1624_EEPROM_SIZE - memoryPosition)) return;
	
	uint8_t	buffer[DS1624_EEPROM_PAGE];
	uint8_t	pagePosition	= 0;
	uint8_t	pageSize		= 0;
	uint8_t buffLen			= 0;
	
	stopConversion();
	
	for (uint16_t pageStart = 0; pageStart < dataLength; pageStart+=DS1624_EEPROM_PAGE)
	{	
		if (pageStart+DS1624_EEPROM_PAGE < dataLength || dataLength%DS1624_EEPROM_PAGE == 0)
			pageSize	= DS1624_EEPROM_PAGE;
		else
			pageSize	= dataLength%DS1624_EEPROM_PAGE;
		
		pagePosition = 0;
		while (pagePosition < pageSize)
		{
			buffer[pagePosition]	= data[pageStart+pagePosition];
			
			pagePosition++;
		}
		
		writePage(buffer, pageSize, (memoryPosition + pageStart));
		
	}
	
	startConversion();
	
	return;
}

void DS1624::writePage(uint8_t *data, uint8_t dataLength, uint8_t pagePosition)
{
	if (dataLength == 0 || dataLength > DS1624_EEPROM_PAGE) return;
	
	Wire.beginTransmission(DS1624_ADDR);
	Wire.send(DS1624_ACCESS_MEM);
	Wire.send(pagePosition);
	
	Wire.send(data, dataLength);
	
	Wire.endTransmission();
	
	// Wait for the DS1624 to finish writing the eeprom
	delay(50);
}

void DS1624::readData(uint8_t *data)
{
	return readData(data, DS1624_EEPROM_SIZE, 0);
}

void DS1624::readData(uint8_t *data, uint8_t dataLength)
{
	return readData(data, dataLength, 0);
}

void DS1624::readData(uint8_t *data, uint8_t dataLength, uint8_t memoryPosition)
{
	// Make sure we don't overlap
	if (dataLength == 0 || dataLength > (DS1624_EEPROM_SIZE - memoryPosition)) return;
	
	uint8_t pagePosition;
	for (uint16_t pagePosition = 0; pagePosition < dataLength; pagePosition++)
	{
		// Send the access memory command along with the starting position
		Wire.beginTransmission(DS1624_ADDR);
		Wire.send(DS1624_ACCESS_MEM);
		Wire.send((int)(memoryPosition + pagePosition));
		Wire.endTransmission();
		
		// Wait for the DS1624 to set the position pointer
		delay(5);
		
		Wire.requestFrom(DS1624_ADDR, 1);
		
		while (!Wire.available());
		
		data[pagePosition] = Wire.receive();
	}
	
	return;
}
#endif