#include	<reg52.h>
#include	"led.h"
unsigned char ledfast=0;		//LED每秒閃爍3次時(shí)使用的中間變量
unsigned char ledslow=0;		//LED每秒閃爍1次時(shí)使用的中間變量
bit	ledlabel=0;							//ledlabel對(duì)應(yīng)LED亮滅

unsigned char keyvalue=0X03;		//鍵值0-短按，1-長(zhǎng)按，2-亮，3-滅
/*ms延時(shí)函數(shù)*/	
void DelayMs(unsigned char value)
{
	unsigned char i,j;
	for(;value>0;value++)
		for(i=20;i>0;i--)
			for(j=25;j>0;j--) ;
}
/*us延時(shí)函數(shù)*/
 void Delay(unsigned   char   value)	//大約1US
 {
 	unsigned	char i,j;
	for(j=0;j<2;j++)
 		for(i=0;i<value;i++);
 }
 
/*MICKEY\KEY狀態(tài)檢測(cè)函數(shù)*/
void KeyStatus(void)
{
	unsigned long counter=0;
	if(MICKEY==DOWN)
	{
			DelayMs(10);			//延時(shí)去抖
			if(MICKEY==DOWN)
			{
				while(MICKEY==DOWN);
				if(MICKEY==UP) 
				{
					ledlabel=~ledlabel;
					if(ledlabel) keyvalue=2;	
					else	keyvalue=3;
				}	
			}
	}
	else if(KEY==DOWN)
	{
			DelayMs(10);						      //延時(shí)去抖
			while(KEY==DOWN)
			{
				counter++;
			}
			if(KEY==UP)
			{
				if(counter>10000)  keyvalue=1;		  	//KEY++長(zhǎng)按
				else if(counter<=10000) keyvalue=0;	  //KEY++短按
			}
	}
}

/*鍵值處理函數(shù)*/
void KeyDeal(void)
{
	switch(keyvalue)
	{
		case 0: MICLED=ledfast;break;					
		case 1: MICLED=ledslow;break;
		case 2:	MICLED=ON;break;
		case 3: MICLED=OFF;break;
		default:break;
	}
}

/*設(shè)置鍵值函數(shù)*/
void Setkeyvalue(unsigned char value)
{
	keyvalue=value;
}


/*T2中斷函數(shù),用作控制1秒內(nèi)D4閃爍的次數(shù)*/
void Timer2_INTR() interrupt 5	
{
	static unsigned char time2_counter;		        //靜態(tài)變量,用于計(jì)算T2的溢出次數(shù)
	TF2=0;											//T2定時(shí)器需手動(dòng)清除溢出標(biāo)志
	time2_counter++;			
	if(time2_counter%5==0)	
		ledfast=~ledfast;				           //溢出5次為約為1/3秒,改變LED快閃的臨時(shí)變量
	if(time2_counter==16)
		{
			time2_counter=0;		             //溢出次數(shù)清零.重新計(jì)數(shù)
			ledslow=~ledslow;			        //溢出16次為約為1秒,改變LED慢閃的臨時(shí)變量
		}
}

/*T2初始函數(shù)*/
void 	InitTimer2()
{
	RCAP2H=0x10;						//定時(shí)器置初值
	RCAP2L=0x00;
	EA=1;							//打開(kāi)中斷總開(kāi)關(guān)
	ET2=1;							//允許T2中斷
	TR2=1;							//啟動(dòng)T2中斷
}