/*
 *  * Bluetooth_Dongle_test.cpp
 *   *
 *    * Created: 18.01.2014 16:59:18
 *     *  Author: h0d3nt3uf3l
 *      */ 


#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>


#define BAUD 9600
//#define MYUBRR F_CPU/16/BAUD-1
#define MYUBRR ((uint16_t) ((F_CPU / ((BAUD) * 16.0)) + .5) - 1)


uint8_t data;


void USART_Init(unsigned int ubrr)
{
      /*Set baud rate*/
    UBRRH = (unsigned char)(ubrr>>8);
    UBRRL = (unsigned char)(ubrr);
    /* Enable receiver and transmitter  & Interrupts for RX & TX*/
    UCSRB = (1<<RXEN) | (1<<TXEN) | (1<<RXCIE) | (1<< TXCIE);
    /* Set frame format: 8data, 1stop bit */
    UCSRC = (1<<UCSZ0) | (1<<UCSZ1);
  
}

void USART_transmit()
{
       UDR = (data);
}

int main(void)
{
    DDRD |= (1 << PD6) | (1 << PD7);
    //led test
    PORTD |= (1 << PD6); // Turn on LED1
    PORTD |= (1 << PD7); // Turn on LED2
    _delay_ms(3000);
	PORTD &= ~(1 << PD6); // Turn off LED1
    PORTD &= ~(1 << PD7); // Turn off LED2

    sei();

    USART_Init(MYUBRR);
    _delay_ms(10);
      
        while(1)
              ;
}

ISR(USART_RXC_vect) //Receive complete
{
    data = UDR;
    USART_transmit();
    PORTD |= (1 << PD6); // Turn on LED1
	PORTD &= ~(1 << PD7); // Turn off LED2
}

ISR(USART_TXC_vect) //Transmit complete
{
    data = 0;
	PORTD &= ~(1 << PD6); // Turn off LED1
	PORTD |= (1 << PD7); // Turn on LED2
}