Autonom robotväckarklocka med trådlös basstation - KTH

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// Bluetooth/USART
//------------------------------------------------------------
// USART Example Application
// Johan Egneblad
// 2010-03-02
// modified for MJAAO-project 2011
#define F_CPU 8000000 // Define the processor clock frequency
#define BAUD 9138 // The baud rate (bits per second) of the communication
#define BAUD_REG F_CPU/16/BAUD-1 // The settings for the usart register
#define BUFFER_SIZE 32 // Maximum message length
#include "transmitter.h"
// Global variables for RX buffering
volatile char rx_buffer[BUFFER_SIZE]; // A text buffer for incoming text
volatile unsigned char rx_recieved_bytes; // A byte counter for the incomming
text
volatile unsigned char rx_eol; // An "end of line" indicator that is set to
one ones a full line is read
// Interrupt vector for USART Recieve Complete
ISR(USART0_RX_vect) {
unsigned char data;
// Read the USART buffer
data = UDR0;
// Check if the old msg has been read (rx_eol should be cleared)
/*if (rx_eol == 0) {
rx_buffer[rx_recieved_bytes] = data;
rx_recieved_bytes++;
// If there is a line break or null character
if (data==0x0d || data==0x0a || data==0x00 || rx_recieved_bytes >=
(BUFFER_SIZE-1)) {
rx_eol = 1; // Tell the end of line is reached
rx_buffer[rx_recieved_bytes] = 0; // Terminate the string correctly
rx_recieved_bytes = 0; // Clear the received bytes counter
}
}*/
//dataRecieved((unsigned char)data);
}
// Initialization function for usart
// inputs:
// ubrr - (unsigned int) the future contents of the UBRR register
void usart_init(unsigned int ubrr) {
// Set the communication speed register UBRR
UBRR0H = (unsigned char)(ubrr>>8); // the most significant byte
UBRR0L = (unsigned char)ubrr; // the least significant byte