#include <avr/io.h>	
#include "DS1820.c"
#include "7segment.c"
#define F_CPU        1000000
#define recieverEnablePin 1
#define recieverEnablePort PORTC
#define recieverEnableRegister DDRC
#define ubrr (((F_CPU/(baud*16UL)))-1)
void UARTInit(unsigned int baud)
{
	UCSR0B |= (1<<RXEN0);
	UCSR0C |= (1<<UCSZ01)|(1<<UCSZ02)|(0<<USBS0);	
	UBRR0H = (ubrr>>8);
	UBRR0L = ubrr;
}
void ADCInit()
{
	ADCSRA=(1<<ADEN)|(1<<ADPS2);//Start ADC, divide clock by 16
}
int ADCRead()
{
	ADMUX |= (1<<MUX1);//Select ADC2	
	ADCSRA |= (1<<ADIF);
	ADCSRA |= (1<<ADSC);
	while(ADCSRA & (1<<ADSC));
	return(ADCW);
	
}
int GetByte(void)
{
	while((UCSR0A&(1<<RXC0))==0);
	return UDR0;
}
void DisplayEmail()
{
	int unread;
	
	recieverEnablePort |= (1<<recieverEnablePin); //Enable receiver
	while(unread != 0x00)
	{
		
		UDR0 = 0;
		unread = GetByte();	
	}
	UDR0 = 0;
	unread = GetByte();
	if(unread == 0xfe)
	{
		UDR0 = 0;
		unread = GetByte();
		display(unread);
	}		
}
void DisplayTemp()
{
	int temperature;
	temperature = getTemp('f');
	display(temperature);	
}
int main()
{
	int knockSensor;
	ADCInit();
	UARTInit(4800);
	DisplayInit();
	recieverEnableRegister |= (1<<recieverEnablePin);//Set receiver power pin as output
	while(1)
	{  
		recieverEnablePort &= ~(1<<recieverEnablePin);//Disable receiver to conserve power
		knockSensor = ADCRead();
		while(knockSensor < 75)
		{
			knockSensor = ADCRead();
			DisplayTemp();
		}	
		knockSensor = ADCRead();
		while(knockSensor < 75)
		{
			knockSensor = ADCRead();
			DisplayEmail();
		}
	}
}