2021-04-16

**

51单片机 3-2 独立按键控制LED状态

**

#include <REGX52.H>
void Delay(unsigned int xms)		
{
	unsigned char i, j;

	while(xms)
	{		
		i = 2;
		j = 199;
		do
		{
			while (--j);
		}	while (--i);
		xms--;
	}
}

void main()
{
	while(1)
	{
		if(P3_1==0)
		{
			Delay(20);
		  while(P3_1==0);
			Delay(20);
			
			P2_0=~P2_0;
			
			
		}
	}		
	
	
}