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正反转可控直流电机

#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned uint
sbit key1=P2^0;
sbit key2=P2^1;
sbit key3=P2^2;
sbit led1=P1^0;
sbit led2=P1^3;
sbit led3=P1^6;
sbit a=P2^6;
sbit b=P2^7;
void delay(uchar z)
{
	uchar x,y;
	for(x=z;x>0;x--)
		for(y=112;y>0;y--);
}
void main(void)
{
	led1=1;led2=0;led3=1;
	while(1)
	{
		
		if(key1==0)
		{
			delay(5);
			while(key1==0);
			a=0;b=0;
			led1=1;	
			led2=0;
			led3=1;
		}
		if(key2==0)
		{
			delay(5);//while(key2==0);
			a=0;b=1;
			led1=0;	
			led2=1;
			led3=1;
		} 
		if(key3==0)
		{	
			delay(9);
			while(key3==0);
			a=1;b=0;
			led1=1;	
			led2=1;
			led3=0;
		}  
	}
}