Picproje Elektronik Sitesi

#define F_CPU 16000000UL
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <stdlib.h>
#include <string.h>

#define  BAUD 74800
#define BRC ((F_CPU/16/BAUD) - 1)

void USART_Init(unsigned int ubrr);
void USART_Transmit(unsigned char data);
void USART_putstring(char * s);

char isim[] = {"0123456789"};

int main(void)
{   
     USART_Init(BRC); //UART 74800 BAUD HIZINA AYARLANDI
     while (1){
          USART_putstring(isim);    
          _delay_ms(50);
     }

}

void USART_Init(unsigned int ubrr){	
	UBRR0H = (unsigned char) (ubrr >> 8); // BAUD HIZI AYARI
	UBRR0L = (unsigned char) ubrr;        // BAUD HIZI AYARI
	UCSR0B = (1 << RXEN0) | (1 << TXEN0);  // VERİ ALMA VE GÖNDERME AKTİF EDİLDİ
	UCSR0C = (1 << USBS0) | (1 << UCSZ01) | (1 << UCSZ00);  // 2 BİT STOP BİT VE 8 BİT KARAKTER SEÇİLDİ
}

void USART_Transmit(unsigned char data){
	while( !(UCSR0A & (1 << UDRE0)) ); // HATTIN BOŞ OLMASINI BEKLE
	UDR0 = data;  // VERİYİ GÖNDER
}

void USART_putstring(char * s) {
	int i = 0;
	while(s[i] != '\0'){
		UART_Transmit(s[i]);
		i++;
	};
}

USART_putstring(&isim);

USART_putstring(isim[0]);

USART_putstring(&isim);

USART_putstring(isim[0]);

USART_putstring(&isim[0]);