/*
 * GccApplication2.c
 *
 * Created: 20.01.2018 11:40:43
 * Author : dokul
 */ 
#define F_CPU 8000000
#define BAUD 2400
#define MYUBRR F_CPU/16/BAUD-1
#include <avr/io.h>
#include <util/delay.h>

void USART_Init( unsigned int ubrr)
{
	/*Set baud rate */
	UBRR0H = (unsigned char)(ubrr>>8);
	UBRR0L = (unsigned char)ubrr;
	/*Enable receiver and transmitter */
	UCSR0B = (1<<RXEN0)|(1<<TXEN0);
	/* Set frame format: 8data, 2stop bit */
	UCSR0C = (1<<USBS0)|(3<<UCSZ00);
}

void USART_Transmit( unsigned char data )
{
	/* Wait for empty transmit buffer */
	while ( !( UCSR0A & (1<<UDRE0)) )
	;
	/* Put data into buffer, sends the data */
	UDR0 = data;
}

unsigned char USART_Receive( void )
{
	/* Wait for data to be received */
	while ( !(UCSR0A & (1<<RXC0)) )
	;
	/* Get and return received data from buffer */
	return UDR0;
}


int main(void)
{
	USART_Init(MYUBRR);
    unsigned char receive;
	DDRC |= 0b00000001;
	while (1) 
    {
			receive = USART_Receive();	
			if (receive == 'a')
			{
				PORTC |= 0x01;
			}
			if (receive == 'b')
			{
				PORTC &= 0xFE;
			}

    }
}