app.c

来自「AVR Devolpment Board」· C语言 代码 · 共 37 行

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


void delay_ms(unsigned int ms)
{
	while(ms--)
		_delay_ms(1);
}


int main(void)
{
	unsigned char i=0;

	/* Set LED and Smg LE pin as output , databus as output */
	DDRA |=(1<<PA4)|(1<<PA5)|(1<<PA6); 
	DDRB  = 0xFF;

	/* Off the Smg display */
	PORTA|=(1<<PA5);
	PORTB = 0x00;
	PORTA&=~(1<<PA5);

	/* Set LED LE pin disable */
	PORTA|= (1<<PA6);
	while(1)
	{
		PORTB=~(1<<i);
		delay_ms(500);
		i++;
		if(i==8)
			i=0;
	}
	return 0;
}