#include "key.h" 
#include "CTRL.H"
#include "dc2ac.h"
#include "task.h" 
unsigned char gcOldKey = 0;
int gcKeyFilter = 0;
unsigned char gcKeyStack[MAX_KEY_STACK] = {"\0"};
unsigned char gcKeySavePtr= 0;
unsigned char gcKetGetPtr = 0;
signed   char gcBLTimer 			  = -1;		     
unsigned char gcKey = 0;								 //键盘键值										    

void TaskScanKey(void)
{		
		unsigned char Key = KEY; 	//按键输入     //去掉LOCK,上下到位  半降全降信号			  
		Key = KEY&KEY_MAP;
		if(Key!=0x0)
		{										  
			if(Key!=gcOldKey)    			//digit filter
			{
				gcOldKey=Key;
				gcKeyFilter=0;
				Beep(1,100); 
			}
			else
			{								 //长按不放的情况
				gcKeyFilter++;		
				if( gcKeyFilter>MAX_KEY_FILTER)        //save key to stack
				{	
			 if(gcKeyFilter>250) 
					{					
            if(Key==KEY_STOP)     //长按2.5S 停止就变成了中停2按键 
						{  
						 gcKeyStack[gcKeySavePtr]=KEY_STOP2; 
						 gcKeySavePtr=(gcKeySavePtr+1)%MAX_KEY_STACK; 
             Beep(1,500); 						 
						}
          }			
           
				  //if((Key&KEY_LOCK)!=KEY_LOCK)	   
					//键值过滤  锁定键不允许连击
					if(((Key&KEY_STOPWARN)==KEY_STOPWARN)
					||  ( (Key&KEY_DEBUG)==KEY_DEBUG)
					||  ( (Key&KEY_SELFTEST)==KEY_SELFTEST))
					{	
						gcKeyFilter=0;	   
						gcKeyStack[gcKeySavePtr]=Key;
						gcKeySavePtr=(gcKeySavePtr+1)%MAX_KEY_STACK;  
						Beep(1,50);           //beep 10ms					 
					}	   
				} 
			}             
		}
		else
		{
			if((gcKeyFilter>6)&&(gcKeyFilter<250))			//延时去抖动 ,按键松开的情况
			{
				gcKeyFilter=0;
				gcKeyStack[gcKeySavePtr]=gcOldKey;
				gcKeySavePtr=(gcKeySavePtr+1)%MAX_KEY_STACK;
				Beep(1,100);           //beep 10ms				  
			}
     else
     {
			 gcKeyFilter=0;
			 
		 }		 
		}
		#ifdef _DEBUG								 
		//printf("Key = 0x%X \n",(int)Key);	
		#endif
}
																				  
														   
/**************************************************************************
    get key code,return 0 if no key
***************************************************************************/
unsigned char GetKey(void)
{
    unsigned char ret;

    if(gcKetGetPtr!=gcKeySavePtr)
    {
        ret=gcKeyStack[gcKetGetPtr];
        gcKetGetPtr=(gcKetGetPtr+1)%MAX_KEY_STACK;
    }
    else
        ret=0;	
    return ret;
}