#include <avr/io.h>

#define F_CPU 1000000UL                    // set the CPU clock

#include <util/delay.h>

#define BAUD 2400UL                           // define baud
#define BAUDRATE ((F_CPU)/(BAUD*16UL)-1)    // set baudrate value for UBRR

// function to initialize UART
void uart_init (void)
{
	UBRRH=(unsigned char)(BAUDRATE>>8);
	UBRRL=(unsigned char)BAUDRATE;                         //set baud rate
	UCSRB|=(1<<TXEN)  |(1<<RXEN);             //enable receiver and transmitter
	
	UCSRC|=(1<<URSEL)|   
		(1<<UCSZ0)|(1<<UCSZ1)|  //8 bit words
		(0<<UPM1)|(0<<UPM0)|	//No Parity
		(0<<UMSEL)|				//Asynch mode
		(0<<USBS);				//= = 1 stop bit    must assign UCSRC all at once with URESEL=1
	
	_delay_ms(1000);
}


void uart_transmit (uint8_t x)
{
	
	while (!( UCSRA & (1<<UDRE)));            // wait while register is free
	UDR = x;								// load data in the register
}


// main function: entry point of program
int main (void)
{
	
	
	_delay_ms(1000);
	uart_init();
	_delay_ms(1000);                       // initialize UART

	
	uart_transmit (0xF);
	uart_transmit (0xE);
	uart_transmit (0x1);
	uart_transmit (0x65);
	
	
	_delay_ms(5000);
	
}