구차니의 잡동사니 모음

#include "avr/io.h"
#include "util/delay.h"

#define DELAY 12

int main(void)
{
    unsigned char idx = 0;
    DDRF = 0xFF;

	/* for USART */
	UBRR0H = 0;
	UBRR0L = 8; // 115k with U2X = 0
	UCSR0A = 0x00; // U2X = 0;
	UCSR0B = 0xF8;
	UCSR0C = 0x06; //Asyncronous - no parity - 1bits(stop) - 8bits(data)

    while(1)
    {
		UDR0 = 'a';
        PORTF = 0x01;
        for(idx = 0;idx < DELAY;idx++) _delay_ms(10);
		_delay_ms(5);
 
 		UDR0 = 'b';
        PORTF = 0x02;
        for(idx = 0;idx < DELAY;idx++) _delay_ms(10);
		_delay_ms(5);
 
 		UDR0 = 'c';
        PORTF = 0x04;
        for(idx = 0;idx < DELAY;idx++) _delay_ms(10);
		_delay_ms(5);
 
		UDR0 = 'd';
        PORTF = 0x08;
        for(idx = 0;idx < DELAY;idx++) _delay_ms(10);
		_delay_ms(5);

		UDR0 = 'e';
        PORTF = 0x10;
        for(idx = 0;idx < DELAY;idx++) _delay_ms(10);
		_delay_ms(5);

		UDR0 = 'f';
        PORTF = 0x20;
        for(idx = 0;idx < DELAY;idx++) _delay_ms(10);
		_delay_ms(5);

		UDR0 = 0x0a;
        PORTF = 0x40;
        for(idx = 0;idx < DELAY;idx++) _delay_ms(10);
		_delay_ms(5);

		UDR0 = 0x0d;
        PORTF = 0x80;
        for(idx = 0;idx < DELAY;idx++) _delay_ms(10);
		_delay_ms(5);
     }
    return 0;
}