main.c

avr单片机的一些实际应用源码

/*
	master :
	main.c
	
	芯艺 2004-09-02   ---------- 2004
*/


#include <avr/io.h>
#include <avr/delay.h>

#define uint unsigned int
#define uchar unsigned char

#define SET_RED_LED cbi(PORTC,1);
#define CLR_RED_LED sbi(PORTC,1);

#define SET_GRN_LED cbi(PORTC,2);
#define CLR_GRN_LED sbi(PORTC,2);

#define SET_YEL_LED cbi(PORTB,0);
#define CLR_YEL_LED sbi(PORTB,0);

#define FREQ 4

void DelayMs(uint ms)
{
	uint i;
	for(i=0;i<ms;i++)
		_delay_loop_2(FREQ *250);
}

int main(void)
{
	uchar i;
	DDRB=0XFF;
	PORTB=0XFF;
	
	while(1)
	{
		for(i=0;i<4;i++)
		{
			PORTB=~(_BV(i));
			DelayMs(300);
			PORTB=0xff;
			DelayMs(300);
		}
	}
}