key.c.bak

IIC READ AND WRITE iic器件的读取 连续读取和页读取

#include	<reg52.h>
#include	"key.h"
#include "delay.h"
unsigned char ledfast=0;		 //LED每秒闪烁3次时使用的中间变量
unsigned char ledslow=0;		 //LED每秒闪烁1次时使用的中间变量
unsigned char keyvalue=0X03; //键值0-短按，1-长按，2-亮，3-灭


/*MICKEY\KEY状态检测函数*/
void KeyStatus(void)
{
/*
	unsigned long counter=0;
	if(MICKEY==DOWN)
	{
			Delay(500);			//延时去抖
			if(MICKEY==DOWN)
			{
				while(MICKEY==DOWN)//等待按键抬起
				{
					KeyDeal();
				}
				if(MICKEY==UP) 
				{
					if(MICLED==OFF) keyvalue=2;	
					else	keyvalue=3;
				}	
			}
	}
	else if(KEY==DOWN)
	{
			DelayMs(5);						      				//延时去抖
			while(KEY==DOWN)										//按下时间计数
			{
				counter++;
				if(counter>10000)  keyvalue=1;		  	//KEY++长按
				KeyDeal();
			}
			if(KEY==UP)														//等待按键抬起
			{
				if(counter<=10000) keyvalue=0;	  //KEY++短按
			}
	}
*/
  unsigned char temp, temp1,temp2;
  if(P0!=0x30)
  {
  		temp=P0&&0x30;
		Delay(500);
		temp1=P0&0X30;
		if(temp1==temp)
		{
			DelayMs(200);
			temp2=P0&0x30;
			switch(temp2)
			{
				case 0x10:if(temp1==0x10);break;	//MICKEY长按
				case 0x20:if(temp1==0x20) keyvalue=1;break;	//KEY 长按				
				//case 1: MICLED=ledslow;break;
				//case 2:	MICLED=ON;break;
				//case 3: MICLED=OFF;break;
				default:break;
			}

		}
   }
}

/*键值处理函数*/
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;
	}
}

/*设置键值函数*/
void Setkeyvalue(unsigned char value)
{
	keyvalue=value;
}


/*T2中断函数,用作控制1秒内D4闪烁的次数*/
void Timer2_INTR() interrupt 5									//35ms			
{
	static unsigned char time2_counter;		        //静态变量,用于计算T2的溢出次数
	time2_counter++;			
	if(time2_counter%7==0)	ledfast=~ledfast;				           //溢出5次为约为1/3秒,改变LED快闪的临时变量
	if(time2_counter==22)
	{
			time2_counter=0;		             //溢出次数清零.重新计数
			ledslow=~ledslow;			        //溢出16次为约为1秒,改变LED慢闪的临时变量
	}
	RCAP2H=0x00;						//定时器置初值
	RCAP2L=0x00;
	TF2=0;											//T2定时器需手动清除溢出标志
}

/*T2初始函数*/
void 	InitTimer2()
{
	RCAP2H=0x00;						//定时器置初值
	RCAP2L=0x00;
	EA=1;							//打开中断总开关
	ET2=1;							//允许T2中断
	TR2=1;							//启动T2中断
}