/*
 * DS18B20.c
 *
 * Created: 27.07.2021 21:12:53
 *  Author: User
 */ 

#include <avr/io.h>
#include "../header/DS18B20.h"
#include <util/delay.h>


void ds_masterreset(){
	DS_OUT;
	_delay_us(DS_MASTERRESET_US);
	DS_IN;
	_delay_us(DS_WAIT_US);
}

void ds_command(uint8_t command){
	int i;
	
	for (i = 0; i < 8; i++){
		if (command & 1) {
			ds_writeone();
		}
		else {
			ds_writezero();
		}
		command = command >> 1;
	}
}

void ds_writezero(){
	DS_OUT;
	_delay_us(DS_WRITEZERO_US);
	DS_IN;
}

void ds_writeone(){
	DS_OUT;
	DS_IN;	
	_delay_us(DS_WRITEONE_US);
}
void ds_readscratch(){
	ds_masterreset();
	ds_command(DS_SKIPROMCOMMAND);
	ds_command(DS_READSCRATCH);
	for(int i = 0; i < 9; i++){
		scratch[i] = ds_readbyte();
	}
}

void ds_converttemp(){	
	ds_masterreset();
	ds_command(DS_SKIPROMCOMMAND);
	ds_command(DS_CONVERTTEMP);
	_delay_ms(DS_WAIT_MS);
}
void ds_readrom(){
	ds_masterreset();
	ds_command(DS_READROMCOMMAND);
	for(int i = 0; i < 7; i++){
		rom[i] = ds_readbyte();
	}
}

int ds_readbit(){
	DS_OUT;
	_delay_us(1);
	DS_IN;
	_delay_us(14);
	if (PINC & (1 << DS_PIN)){
		_delay_us(45);
		return 1;
	}
	_delay_us(45);
	return 0;
} 

uint8_t ds_readbyte(){
	uint8_t i_byte = 0;
	for (int i = 0; i <  8; i++){
		i_byte =  i_byte >> 1;
		i_byte |= (ds_readbit() << 7);
		
	}
	return i_byte;
}