avr 2560 串口输出

/*
 * GccApplication1.cpp
 *
 * Created: 2013/8/21 星期三 13:32:34
 *  Author: zyl
 */ 


#include <avr/io.h>
#include <util/delay.h>
#include <zyl/macros.h>

#define fosc 8000000
#define baud 115200

void uart0_init(void)

{

	UCSR0B = 0x00;

	UCSR0A = 0x00;

	UCSR0C = (1 << UCSZ01) | (1 << UCSZ00);

	UBRR0L = (fosc / 16 / (baud + 1)) % 256;

	UBRR0H = (fosc / 16 / (baud + 1)) / 256;

	UCSR0B = (1 << RXEN0) | (1 << TXEN0);

}

void putchar0(unsigned char c)

{

	while (!(UCSR0A & (1 << UDRE0)))
	;

	UDR0 = c;

}

unsigned char getchar0(void)

{

	while (!(UCSR0A & (1 << RXC0)))
	;

	return UDR0;

}

void puts0(char *s)

{

	while (*s)

	{

		putchar0(*s);

		s++;

	}

	putchar0(0x0a);

	putchar0(0x0d);

}

int main(void)

{

	unsigned char i;

	uart0_init();

	puts0("HELLO!");

	while (1)

	{

		puts0("test ok!");
		 _delay_ms(1000);

	}
return 0;
}