led.c.bak

IIC READ AND WRITE iic器件的读取 连续读取和页读取

#include	<reg52.h>
#include	"led.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
bit	ledlabel=0;							//ledlabel对应LED亮灭

unsigned char keyvalue=0X03;		//键值0-短按，1-长按，2-亮，3-灭
/*ms延时函数*/	
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延时函数*/
 void Delay(unsigned   char   value)	//大约1US
 {
 	unsigned	char i,j;
	for(j=0;j<2;j++)
 		for(i=0;i<value;i++);
 }
 
/*MICKEY\KEY状态检测函数*/
void KeyStatus(void)
{
	unsigned long counter=0;
	if(MICKEY==DOWN)
	{
			DelayMs(10);			//延时去抖
			if(MICKEY==DOWN)
			{
				while(MICKEY==DOWN);
				if(MICKEY==UP) 
				{
					ledlabel=~ledlabel;
					if(ledlabel) keyvalue=2;	
					else	keyvalue=3;
				}	
			}
	}
	else if(KEY==DOWN)
	{
			DelayMs(10);						      //延时去抖
			while(KEY==DOWN)
			{
				counter++;
			}
			if(KEY==UP)
			{
				if(counter>10000)  keyvalue=1;		  	//KEY++长按
				else if(counter<=10000) keyvalue=0;	  //KEY++短按
			}
	}
}

/*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	
{
	static unsigned char time2_counter;		        //静态变量,用于计算T2的溢出次数
	TF2=0;											//T2定时器需手动清除溢出标志
	time2_counter++;			
	if(time2_counter%5==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==16)
		{
			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
		}
}

/*T2初始函数*/
void 	InitTimer2()
{
	RCAP2H=0x10;						//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
}