#define F_CPU 14745600UL   

#include <avr/io.h>
#include <string.h>
#include <stdio.h> 
#include <util/delay.h>
#include <stdint.h>




//*******************************************************************************************
//  MOJE UPRAVY
//-------------------------------------------------------------------------------------------
//
#define setb(port,pin)    port |= 1<<pin    //nastav bit
#define clrb(port,pin)    port &= ~(1<<pin) //nuluj bit
#define negb(port,pin)    port ^= 1<<pin    //neguj bit



//*******************************************************************************************
//UART ATmega 128
//*******************************************************************************************
// Funkce pro UART:
void init_uart (unsigned int baud);         //inicializace UART
unsigned char u_getc( void );               //prijmi znak z UART
void u_putc( char data );                   //napiš znak do UART
void u_puts( char *text );                  //napiš string do UART



// UART pošli znak:
void u_putc( char data )
{

while ( !( UCSR0A & (1<<UDRE)) )     // Wait for empty transmit buffer
;
UDR0 = data;                         // Put data into buffer, sends the data
}


// UART pošli string:
void u_puts( char *text )
{
unsigned char i=0,temp;

	do
	{
	temp = text[i];
	if(temp==0) break;
	u_putc(temp);
	i++;
	}
	while(temp>0);
}

// UART prijmi znak:
unsigned char u_getc( void )
{

while ( !(UCSR0A & (1<<RXC)) )       // Wait for data to be received
;
return UDR0;                         // Get and return received data from buffer
}

//**************************************************************************************
//**************************************************************************************


void uart_init (void)
{
// USART0 initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART0 Receiver: On
// USART0 Transmitter: On
// USART0 Mode: Asynchronous
// USART0 Baud Rate: 9600
UCSR0A=0x00;
UCSR0B=0x18; //bez preruseni
//UCSR0B=0x98; // s prerusenim na prijem znaku (nutny vektor preruseni, globalne preruseni povolit a knihovna preruseni)
UCSR0C=0x06;
UBRR0H=0x00;
UBRR0L=0x5F;

}




int main(void)
{


uart_init();

while (1)
      {

	u_puts("POKUS");    
	u_puts("\r\n");   
    	_delay_ms(500);
      

      };
}