#define F_CPU 16000000UL
#include <avr/io.h>
#include <util/delay.h>
#include "uart.h"
#include <math.h>
#include <stdio.h>
#include <stdlib.h>

uint8_t c=0, I_RH, D_RH, I_Temp, D_Temp, CheckSum;

#define setbit(port, bit) ((port) |= (1<<bit));
#define clearbit(port, bit) ((port) &= ~(1<<bit));
#define togglebit(port, bit) ((port) ^= (1<<bit));

#define STATUS_LED_PORT PORTC
#define STATUS_LED_PIN PORTC3

char porty[8]="00000000";

#define LED_PIN (1<<PB5)
#define LED_MIG PORTB ^= LED_PIN
#define LED_OFF PORTB &= ~LED_PIN
#define LED_ON PORTB |= LED_PIN

#define GUZIK_PIN (1<<PB7)

#define GUZIK2_PIN (1<<PD0)

#define GUZIK3_PIN (1<<PD2)

#define WEN_PIN (1<<PD4)
#define WEN_ON PORTD |= WEN_PIN		
#define WEN_OFF PORTD &= ~WEN_PIN

#define HEA_PIN (1<<PD6)
#define HEA_ON PORTD |= HEA_PIN		
#define HEA_OFF PORTD &= ~HEA_PIN

#define DHT11_PIN PIND7

void Request()						/* Microcontroller send start pulse or request */
{
	DDRD |= (1<<DHT11_PIN);
	PORTD &= ~(1<<DHT11_PIN);		/* set to low pin */
	_delay_ms(20);					/* wait for 20ms */
	PORTD |= (1<<DHT11_PIN);		/* set to high pin */
}

void Response()						/* receive response from DHT11 */
{
	DDRD &= ~(1<<DHT11_PIN);
	while(PIND & (1<<DHT11_PIN));
	while((PIND & (1<<DHT11_PIN))==0);
	while(PIND & (1<<DHT11_PIN));
}

uint8_t Receive_data()							/* receive data */
{
	for (int q=0; q<8; q++)
	{
		while((PIND & (1<<DHT11_PIN)) == 0);	/* check received bit 0 or 1 */
		_delay_us(30);
		if(PIND & (1<<DHT11_PIN))				/* if high pulse is greater than 30ms */
		c = (c<<1)|(0x01);						/* then its logic HIGH */
		else									/* otherwise its logic LOW */
		c = (c<<1);
		while(PIND & (1<<DHT11_PIN));
	}
	return c;
}

int main(void)
{
	char data[5];
	
	UartInit();
	
	DDRB |=LED_PIN;
	
	DDRB &= ~GUZIK_PIN;
	PORTB |= GUZIK_PIN;	
	
	DDRD &= ~GUZIK2_PIN;
	PORTD |= GUZIK2_PIN;	
	
	DDRD &= ~GUZIK3_PIN;
	PORTD |= GUZIK3_PIN;		
	
	DDRD |= WEN_PIN;
	
	while (1)
	{
		porty[0]='1';
				
		UartTransmitString("Rozpoczecie pomiaru: \r\n");
		Request();				/* send start pulse */
		Response();				/* receive response */
		I_RH=Receive_data();	/* store first eight bit in I_RH */
		D_RH=Receive_data();	/* store next eight bit in D_RH */
		I_Temp=Receive_data();	/* store next eight bit in I_Temp */
		D_Temp=Receive_data();	/* store next eight bit in D_Temp */
		CheckSum=Receive_data();/* store next eight bit in CheckSum */
		_delay_ms(200);
		
		_delay_ms(1800);
				
		if ((I_RH + D_RH + I_Temp + D_Temp) != CheckSum)
		{
			//LED_OFF;
			UartTransmitString("Blad pomiaru!!! \r\n");
		}
		else {
			UartTransmitString("Temperatura powietrza wynosi: ");
			_delay_ms(500);
			UartTransmitInt(I_Temp);
			UartTransmitString(".");
			UartTransmitInt(D_Temp);
			UartTransmitString("C \r\n");
			//UartTransmitString("\r\n");
			_delay_ms(1000);
			
			//int temperatura = I_Temp;
			
			//if(temperatura >= 22)
			//{
			//	LED_ON;
			//}
			//	else
			//{
			//	LED_OFF;
			//}
		
			if( !(PIND & GUZIK2_PIN) )
			{
				LED_ON;
				WEN_OFF;
				//HEA_ON;
			}
			
			if( !(PIND & GUZIK3_PIN) )
			{
				LED_OFF;
				WEN_ON;
				//HEA_OFF;
			}
	}
}

ISR(USART_RX_vect)
{
	RX_data=UDR0;
}