独立按键控制LED显示二进制

#include <REGX52.H>
#include <INTRINS.H>

void Delay(unsigned int xms)		//@11.0592MHz
{
	unsigned char i, j;

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

void main()
{
	unsigned char LEDNum=0; 
	
	while(1)
	{
		if(P3_0==0)
		{
			Delay(20);
			while(P3_0==0);
			Delay(20);
			
			LEDNum++;
			P1=~LEDNum;
		}
	}
}