/* 
 * Title       : ds2438.c
 * Description : DS2438 subroutine
 * Author      : KAWAMOTO Yasuhisa
 * URL         : http://www.devdrv.co.jp/
 * Date        : 01/16/2006
 */
 
//-----------------------------------------------------------------------------
// Includes
//-----------------------------------------------------------------------------
#include <c8051f330.h>
#include "main.h"

//-----------------------------------------------------------------------------
// init_ds2438
//-----------------------------------------------------------------------------
void init_ds2438(void)
{
}

//-----------------------------------------------------------------------------
// ds2438
//-----------------------------------------------------------------------------
void ds2438(void)
{
	unsigned char i;
	
	for(i = 0; i < 8; i++)
		uart0_put_val(ROMCode[i]);
	
	// Write Scratchpad
	OWTouchReset();
	OWWriteByte(0x55);
	for(i = 0; i < 8; i++)
		OWWriteByte(ROMCode[i]);
	OWWriteByte(0x4E);
	OWWriteByte(0x00);
	OWWriteByte(0x08);						// AD = 1(VDD)
	OWWriteByte(0x00);
	OWWriteByte(0x00);
	OWWriteByte(0x00);
	OWWriteByte(0x00);
	OWWriteByte(0x00);
	OWWriteByte(0x00);
	OWWriteByte(0x00);
	
	// Convert V
	OWTouchReset();
	OWWriteByte(0x55);
	for(i = 0; i < 8; i++)
		OWWriteByte(ROMCode[i]);
	OWWriteByte(0xB4);
	
	tickDelay(10000*(SYSCLK/100000)/140);	// tCONV = 10ms
	
	// Recall Memory
	OWTouchReset();
	OWWriteByte(0x55);
	for(i = 0; i < 8; i++)
		OWWriteByte(ROMCode[i]);
	OWWriteByte(0xB8);
	OWWriteByte(0x00);
	
	// Read Scratchpad
	OWTouchReset();
	OWWriteByte(0x55);
	for(i = 0; i < 8; i++)
		OWWriteByte(ROMCode[i]);
	OWWriteByte(0xBE);
	OWWriteByte(0x00);
	for(i = 0; i < 9; i++)
	{
		uart0_put_val(OWReadByte());
	}
	
	// Write Scratchpad
	OWTouchReset();
	OWWriteByte(0x55);
	for(i = 0; i < 8; i++)
		OWWriteByte(ROMCode[i]);
	OWWriteByte(0x4E);
	OWWriteByte(0x00);
	OWWriteByte(0x00);						// AD = 0(VAD)
	OWWriteByte(0x00);
	OWWriteByte(0x00);
	OWWriteByte(0x00);
	OWWriteByte(0x00);
	OWWriteByte(0x00);
	OWWriteByte(0x00);
	OWWriteByte(0x00);
	
	// Convert T
	OWTouchReset();
	OWWriteByte(0x55);
	for(i = 0; i < 8; i++)
		OWWriteByte(ROMCode[i]);
	OWWriteByte(0x44);
	
	tickDelay(10000*(SYSCLK/100000)/140);	// tCONV = 10ms
	
	// Convert V
	OWTouchReset();
	OWWriteByte(0x55);
	for(i = 0; i < 8; i++)
		OWWriteByte(ROMCode[i]);
	OWWriteByte(0xB4);
	
	tickDelay(10000*(SYSCLK/100000)/140);	// tCONV = 10ms
	
	// Recall Memory
	OWTouchReset();
	OWWriteByte(0x55);
	for(i = 0; i < 8; i++)
		OWWriteByte(ROMCode[i]);
	OWWriteByte(0xB8);
	OWWriteByte(0x00);
	
	// Read Scratchpad
	OWTouchReset();
	OWWriteByte(0x55);
	for(i = 0; i < 8; i++)
		OWWriteByte(ROMCode[i]);
	OWWriteByte(0xBE);
	OWWriteByte(0x00);
	for(i = 0; i < 9; i++)
	{
		uart0_put_val(OWReadByte());
	}
	
	uart0_put_char('\r');
	uart0_put_char('\n');
	
	OWTouchReset();
}