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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 BAUD 9600
  16. //#define MYUBRR F_CPU/16/BAUD-1
  17. #define MYUBRR ((uint16_t) ((F_CPU / ((BAUD) * 16.0)) + .5) - 1)
  20. uint8_t data;
  23. void USART_Init(unsigned int ubrr)
  24. {
  25. /*Set baud rate*/
  26. UBRRH = (unsigned char)(ubrr>>8);
  27. UBRRL = (unsigned char)(ubrr);
  28. /* Enable receiver and transmitter & Interrupts for RX & TX*/
  29. UCSRB = (1<<RXEN) | (1<<TXEN) | (1<<RXCIE) | (1<< TXCIE);
  30. /* Set frame format: 8data, 1stop bit */
  31. UCSRC = (1<<UCSZ0) | (1<<UCSZ1);
  33. }
  35. void USART_transmit()
  36. {
  37. UDR = (data);
  38. }
  40. int main(void)
  41. {
  42. DDRD |= (1 << PD6) | (1 << PD7);
  43. //led test
  44. PORTD |= (1 << PD6); // Turn on LED1
  45. PORTD |= (1 << PD7); // Turn on LED2
  46. _delay_ms(3000);
  47. PORTD &= ~(1 << PD6); // Turn off LED1
  48. PORTD &= ~(1 << PD7); // Turn off LED2
  50. sei();
  52. USART_Init(MYUBRR);
  53. _delay_ms(10);
  55. while(1)
  56. ;
  57. }
  59. ISR(USART_RXC_vect) //Receive complete
  60. {
  61. data = UDR;
  62. USART_transmit();
  63. PORTD |= (1 << PD6); // Turn on LED1
  64. PORTD &= ~(1 << PD7); // Turn off LED2
  65. }
  67. ISR(USART_TXC_vect) //Transmit complete
  68. {
  69. data = 0;
  70. PORTD &= ~(1 << PD6); // Turn off LED1
  71. PORTD |= (1 << PD7); // Turn on LED2
  72. }
  73.  
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