WhyCan Forum(哇酷开发者社区)

void Key_scan(unsigned key_lab,unsigned char *key)
{
	#define KEY_DWON 20    //
	#define KEY_FREE 20   //Êͷżì²â´ÎÊý
	static unsigned char key_same_times=0;
	static unsigned char last_key=0;
	static bit if_free=0;

	
	if(if_free) //ÊÍ·ÅÖмì²â°´¼ü
	{
		
		if((last_key==key_lab)&&(key_lab!=0))
		{
			 if(key_same_times<255)
			 {
				 key_same_times++;
			 }
			 else;
		}
		else key_same_times=0;
		
		if(key_same_times>=KEY_DWON)
		{
			
			*key=key_lab;
			key_same_times=0;
			if_free=0;		
		}
		
		
	}
	else       //¼ì²â°´¼üÊÍ·Å
	{
		if(key_lab==0)key_same_times++;
		else key_same_times=0;
		
	
		
		if(key_same_times>=KEY_FREE)
		{
			
			if_free=1;
			key_same_times=0;
			
		}
		else ;
		
		
		
	}
	
	last_key=key_lab;
	
}