//digimot
//1820.c
#include "main.h"

//**********************************************************************
void init_D1820(void)
{
	D1820_DDR |=(1<<D1820_P);
	//TEST
	uint8_t presence = 0;
	presence=reset();
	if(presence==0) lcd_string(1,1,"No 1-wire device");
	if(presence==1) lcd_string(1,1,"1-wire device ok");
	_delay_ms(500);
	
	
}
//**********************************************************************
uint8_t reset(void)
{
	uint8_t presence = 0;
	P_OUT;//Master out
	DQ_LOW;
	_delay_us(500);//reset pulse
	//DQ_HIGH;
	P_IN;//Master release DQ
	_delay_us(60);//wait for presence puls
	
	if(!(D1820_PIN & (1<<D1820_P))) presence = 1;//presence puls
	else presence = 0;
	_delay_us(400);//wait for end of slot
	return presence;
}
//**********************************************************************
void send_byte(uint8_t byte)
{
	P_OUT;
	if(reset()==1)//presence ok?
	{
		for(uint8_t i=0;i<8;i++)
		{
			if(byte & 0x01)// 1
			{
				DQ_LOW;
				_delay_us(6);
				DQ_HIGH;
				_delay_us(54);//fill slot time to 60µs
				_delay_us(10);//recovery time between each slot
			}
			else// 0
			{
				DQ_LOW;
				_delay_us(60);
				DQ_HIGH;
				_delay_us(10);//recovery time between each slot
				
			}
			byte=(byte>>1);
		}
	}
	else lcd_string(1,1,"No 1-wire device");
}
//**********************************************************************
uint8_t receive_byte(void)
{
	P_OUT;
	uint8_t byte = 0;
	for(uint8_t i=0;i<8;i++)
	{
		DQ_LOW;
		_delay_us(6);//Set DQ low for 6µs
		DQ_HIGH;
		_delay_us(9);//Wait for response
		P_IN;
		if(D1820_PIN & (1<<D1820_P)) byte=123;//byte |= (1<<i);//save response
		_delay_us(45);//fill slot time to 60µs
		_delay_us(10);//recovery time between each slot
		//byte<<=1;
		P_OUT;
	}
	return byte;
}
//**********************************************************************
void read_rom(void)
{
	cli();//TEST
	uint8_t rom[8];
	send_byte(0x33);
	for(uint8_t i=0;i<8;i++)
	{
		rom[i]=receive_byte();
	}
	//TEST
	lcd_clear();
	for(uint8_t i=0;i<8;i++)
	{
		lcd_number(3,1,1+(4*i),rom[i]);
	}
	sei();//TEST
}
//**********************************************************************
void match_rom(void)
{
	
}
//**********************************************************************
void skip_rom(void)
{
	
}
//**********************************************************************
void convert_t(void)
{
	
}
//**********************************************************************
void read_t(void)
{
	
}