led.c

来自「基于AVRstudio平台对无线传感器编制的测试程序」· C语言 代码 · 共 22 行

#include <avr/io.h>

int main(void)
{
	unsigned char i,j,k,led=0;
	DDRA = 0xff;
	PORTA = 0xff;
	while(1)
	{
		if(led)
			PORTA |= 0x01;//黄灯灭
		else
			PORTA &= 0xfe;//黄灯亮
		led = !led;
		//延时
		for(i = 0;i < 255;i++)
			for(j = 0; j < 255;j++)
				k++;
	}
}