/*
 * uart.h
 *
 *  Created on: 14-May-2014
 *      Author: Harman
 */
#include <avr/io.h>

#ifndef UART_H_
#define UART_H_

#define FOSC	4000000

//function to enable uart at specified baud rate
void enable_uart(uint16_t BAUD)
{
	UCSRA = (1 << U2X);
	UBRRH = (unsigned char) ((FOSC / 8 / BAUD - 1) >> 8);
	UBRRL = (unsigned char) (FOSC / 8 / BAUD - 1);
	UCSRB = (1 << RXEN) | (1 << TXEN);
	UCSRC = (1 << URSEL) | (1 << UCSZ1) | (1 << UCSZ0);
}

//function to disable uart and flush the UDR register
void disable_uart()
{
	UCSRB &= ~((1 << RXEN) | (1 << TXEN));
}

//function to send the data to uart
void sendchar_uart(char c)
{
	while (!(UCSRA & (1 << UDRE)));

	UDR = c;

	while (!(UCSRA & (1 << TXC)));

	UCSRA |= (1 << TXC);
}

//function to receive data from uart
uint8_t getchar_uart()
{
	// Wait until a byte has been received
	while (!(UCSRA & (1 << RXC)));

	UCSRA |= (1 << RXC);
	// Return received data

	return UDR;
}

void sendstring_uart(char v[])
{
	int i;
	for(i=0;i<strlen(v);i++)
	{
		sendchar_uart(v[i]);
		//_delay_ms(10);
	}
}

#endif /* UART_H_ */