/*
 * lcd+lm35.c
 *
 * Created: 2016-06-10 00:04:53
 * Author : Pat
 */

#define F_CPU 1000000L
#include <avr/delay.h>
#include <avr/io.h>
#include <string.h>
#include <avr/interrupt.h>


/****************************************************************************************************
Podłączenie pinów

LCD

vss		GND
vdd		Vcc
v0		potencjometr
rs		PC5
rw		PC6
e		PC7
D0...D7		PB0...PB7
A		Vcc
K		GND

LM35

Vo		PA5

*****************************************************************************************************/

/*LCD function declarations */
void LCD_send_command(unsigned char cmnd);
void LCD_send_data(unsigned char data);
void LCD_init();
void LCD_goto(unsigned char y, unsigned char x);
void LCD_print(char *string);

#define LCD_DATA_PORT	PORTB
#define LCD_DATA_DDR	DDRB
#define LCD_DATA_PIN	PINB

#define LCD_CNTRL_PORT	PORTC
#define LCD_CNTRL_DDR	DDRC
#define LCD_CNTRL_PIN	PINC

#define LCD_RS_PIN		5
#define LCD_RW_PIN		6
#define LCD_ENABLE_PIN  7

#define SET_HOUR		3
#define SET_MINUTE		4

//volatile zmienna=ADMUX;

volatile float pomiar;
volatile float pomiar_lm;
volatile int licznik=0;
volatile char str1[8];
volatile char str_lm[8];

int main(void)
{


    init_ADC();
    LCD_init();
    LCD_goto(2,1);
    LCD_print("Zimny ");
	LCD_goto(1,1);
	LCD_print("Cieply:");
	sei();

    LCD_CNTRL_PORT = (1<<SET_HOUR | 1<<SET_MINUTE);

    while (1)
    {

		pomiar*=0.0049;
		pomiar=pomiar-2.3 ; // volty na stopnie(-Vw0)
		pomiar/=0.0100;     //0.01V/1 C
		dtostrf(pomiar, 8, 1, str1);

		pomiar_lm*=0.0049;
		pomiar_lm*=100;
		dtostrf(pomiar_lm, 8, 1, str_lm);

		LCD_goto(1,7);
		LCD_print(str1);

		LCD_goto(1,15);
		LCD_print("*C");

		LCD_goto(2,7);
		LCD_print(str_lm);

		LCD_goto(2,15);
		LCD_print("*C");

		_delay_ms(500);
    }
}

ISR(ADC_vect)
{

		if (licznik==0) //termo
		{
			ADMUX |= (1 << MUX0);  // wybor wejscia dla przetwornika (ADC5-PA5)
			ADMUX |= (1 << MUX2);
			ADMUX &=~(1<<MUX1);
			pomiar = ADC;
			licznik=1;

		}
		else //lm35
		{
			ADMUX |= (1 << MUX0);  // wybor wejscia dla przetwornika (ADC5-PA5)
			ADMUX |= (1 << MUX2);
			ADMUX |= (1<<MUX1);
			pomiar_lm=ADC;
			licznik=0;

		}

}

void init_ADC (void)
{

	ADMUX |= (1 << REFS0);  // ustaw wewnetrzne napiecie odniesienia na AVCC

	ADCSRA |= (1 << ADPS2); // wybór czestotliwosci pracy przetwornika preskaler=128
	ADCSRA |= (1 << ADPS1);
	ADCSRA |= (1 << ADPS0);
	ADCSRA |= (1<<ADATE);

	ADCSRA |= (1<<ADIE);   //uruchomienie zgłaszania przerwań

	DDRA &= ~(1<<PA5);     //PA5 jak wejście
	//
	DDRA &= ~(1<<PA7);     //PA7 jak wejście
	//
	ADCSRA |= (1 <<ADEN);
	ADCSRA |= (1 <<ADSC);  // zezwolenie na prace ADC

}



void LCD_send_command(unsigned char cmnd)
{
	LCD_DATA_PORT = cmnd;
	LCD_CNTRL_PORT &= ~(1<<LCD_RW_PIN);
	LCD_CNTRL_PORT &= ~(1<<LCD_RS_PIN);

	LCD_CNTRL_PORT |= (1<<LCD_ENABLE_PIN);
	_delay_us(2);
	LCD_CNTRL_PORT &= ~(1<<LCD_ENABLE_PIN);
	_delay_us(100);
}

void LCD_send_data(unsigned char data)
{
	LCD_DATA_PORT = data;
	LCD_CNTRL_PORT &= ~(1<<LCD_RW_PIN);
	LCD_CNTRL_PORT |= (1<<LCD_RS_PIN);

	LCD_CNTRL_PORT |= (1<<LCD_ENABLE_PIN);
	_delay_us(2);
	LCD_CNTRL_PORT &= ~(1<<LCD_ENABLE_PIN);
	_delay_us(100);
}

void LCD_init()
{
	LCD_CNTRL_DDR = 0xFF;
	LCD_CNTRL_PORT = 0x00;
	LCD_DATA_DDR = 0xFF;
	LCD_DATA_PORT = 0x00;

	_delay_ms(10);
	LCD_send_command(0x38);
	LCD_send_command(0x0C);
	LCD_send_command(0x01);
	_delay_ms(10);
	LCD_send_command(0x06);
}

void LCD_goto(unsigned char y, unsigned char x)
{
	unsigned char firstAddress[] = {0x80,0xC0,0x94,0xD4};

	LCD_send_command(firstAddress[y-1] + x-1);
	_delay_ms(10);
}

void LCD_print(char *string)
{
	unsigned char i=0;

	while(string[i]!=0)
	{
		LCD_send_data(string[i]);
		i++;
	}
}