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  2. /*
  3. * * Bluetooth_Dongle_test.cpp
  4. * *
  5. * * Created: 18.01.2014 16:59:18
  6. * * Author: h0d3nt3uf3l
  7. * */
  10. #include <avr/io.h>
  11. #include <avr/interrupt.h>
  12. #include <util/delay.h>
  15. //#define F_CPU 800000
  16. #define BAUD 9600
  17. #define MYUBRR F_CPU/16/BAUD-1
  19. uint8_t data;
  22. void USART_Init(unsigned int ubrr)
  23. {
  24. /*Set baud rate*/
  25. UBRRH = (unsigned char)(ubrr>>8);
  26. UBRRL = (unsigned char)(ubrr);
  27. /* Enable receiver and transmitter & Interrupts for RX & TX*/
  28. UCSRB = (1<<RXEN) | (1<<TXEN) | (1<<RXCIE) | (1<< TXCIE);
  29. /* Set frame format: 8data, 1stop bit */
  30. UCSRC = (1<<UCSZ0) | (1<<UCSZ1);
  32. }
  34. void USART_transmit()
  35. {
  36. UDR = (data);
  37. }
  39. int main(void)
  40. {
  42. sei();
  44. USART_Init(MYUBRR);
  45. _delay_ms(10);
  47. while(1)
  48. ;
  49. }
  51. ISR(USART_RX_vect) //Receive complete
  52. {
  53. data = UDR;
  54. USART_transmit();
  55. }
  57. ISR(USART_TX_vect) //Transmit complete
  58. {
  59. data = 0;
  60. }
  61.  
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