#include "eeprom.h"


//初始化IIC接口
//void AT24CXX_Init(void)
//{
//	//IIC_Init();
//}
//在AT24CXX指定地址读出一个数据
//ReadAddr:开始读数的地址  
//返回值  :读到的数据
uint8_t AT24CXX_ReadOneByte(AT24CXX *at24cxx,uint16_t ReadAddr)
{				  
	uint8_t temp=0;		  	    																 
     at24cxx->iic.Start(&at24cxx->iic);;  
	if(EE_TYPE>AT24C16)
	{
		 at24cxx->iic.WriteByte(&at24cxx->iic,0XA0);	   //发送写命令
		 at24cxx->iic.WaitAck(&at24cxx->iic);
		 at24cxx->iic.WriteByte(&at24cxx->iic,ReadAddr>>8);//发送高地址
		 at24cxx->iic.WaitAck(&at24cxx->iic);		 
	}else  at24cxx->iic.WriteByte(&at24cxx->iic,0XA0+((ReadAddr/256)<<1));   //发送器件地址0XA0,写数据 	 

	 at24cxx->iic.WaitAck(&at24cxx->iic); 
     at24cxx->iic.WriteByte(&at24cxx->iic,ReadAddr%256);   //发送低地址
	 at24cxx->iic.WaitAck(&at24cxx->iic);	    
	 at24cxx->iic.Start(&at24cxx->iic);;  	 	   
	 at24cxx->iic.WriteByte(&at24cxx->iic,0XA1);           //进入接收模式			   
	 at24cxx->iic.WaitAck(&at24cxx->iic);	 
     temp = at24cxx->iic.ReadByte(&at24cxx->iic);	   
      at24cxx->iic.Stop(&at24cxx->iic);//产生一个停止条件	    
	return temp;
}
//在AT24CXX指定地址写入一个数据
//WriteAddr  :写入数据的目的地址    
//DataToWrite:要写入的数据
void AT24CXX_WriteOneByte(AT24CXX *at24cxx,uint16_t WriteAddr,uint8_t DataToWrite)
{				   	  	    																 
     at24cxx->iic.Start(&at24cxx->iic);;  
	if(EE_TYPE>AT24C16)
	{
        at24cxx->iic.WriteByte(&at24cxx->iic,0XA0);	    //发送写命令
        at24cxx->iic.WaitAck(&at24cxx->iic);
        at24cxx->iic.WriteByte(&at24cxx->iic,WriteAddr>>8);//发送高地址
 	}else
	{
        at24cxx->iic.WriteByte(&at24cxx->iic,0XA0+((WriteAddr/256)<<1));   //发送器件地址0XA0,写数据 
	}	 
    at24cxx->iic.WaitAck(&at24cxx->iic);	   
    at24cxx->iic.WriteByte(&at24cxx->iic,WriteAddr%256);   //发送低地址
    at24cxx->iic.WaitAck(&at24cxx->iic); 	 										  		   
    at24cxx->iic.WriteByte(&at24cxx->iic,DataToWrite);     //发送字节							   
    at24cxx->iic.WaitAck(&at24cxx->iic);  		    	   
    at24cxx->iic.Stop(&at24cxx->iic);//产生一个停止条件 
	delay_1ms(10);	 
}
//在AT24CXX里面的指定地址开始写入长度为Len的数据
//该函数用于写入16bit或者32bit的数据.
//WriteAddr  :开始写入的地址  
//DataToWrite:数据数组首地址
//Len        :要写入数据的长度2,4
void AT24CXX_WriteLenByte(AT24CXX *at24cxx,uint16_t WriteAddr,uint32_t DataToWrite,uint8_t Len)
{  	
	uint8_t t;
	for(t=0;t<Len;t++)
	{
		AT24CXX_WriteOneByte(at24cxx,WriteAddr+t,(DataToWrite>>(8*t))&0xff);
	}												    
}

//在AT24CXX里面的指定地址开始读出长度为Len的数据
//该函数用于读出16bit或者32bit的数据.
//ReadAddr   :开始读出的地址 
//返回值     :数据
//Len        :要读出数据的长度2,4
uint32_t AT24CXX_ReadLenByte(AT24CXX *at24cxx,uint16_t ReadAddr,uint8_t Len)
{  	
	uint8_t t;
	uint32_t temp=0;
	for(t=0;t<Len;t++)
	{
		temp<<=8;
		temp+=AT24CXX_ReadOneByte(at24cxx,ReadAddr+Len-t-1); 	 				   
	}
	return temp;												    
}
//检查AT24CXX是否正常
//这里用了24XX的最后一个地址(255)来存储标志字.
//如果用其他24C系列,这个地址要修改
//返回1:检测失败
//返回0:检测成功
uint8_t AT24CXX_Check(AT24CXX *at24cxx)
{
	uint8_t temp;
	temp=AT24CXX_ReadOneByte(at24cxx,255);//避免每次开机都写AT24CXX			   
	if(temp==0X55)return 0;		   
	else//排除第一次初始化的情况
	{
		AT24CXX_WriteOneByte(at24cxx,255,0X55);
	    temp=AT24CXX_ReadOneByte(at24cxx,255);	  
		if(temp==0X55)return 0;
	}
	return 1;											  
}

//在AT24CXX里面的指定地址开始读出指定个数的数据
//ReadAddr :开始读出的地址 对24c02为0~255
//pBuffer  :数据数组首地址
//NumToRead:要读出数据的个数
void AT24CXX_Read(AT24CXX *at24cxx,uint16_t ReadAddr,uint8_t *pBuffer,uint16_t NumToRead)
{
	while(NumToRead)
	{
		*pBuffer++=AT24CXX_ReadOneByte(at24cxx,ReadAddr++);	
		NumToRead--;
	}
}  
//在AT24CXX里面的指定地址开始写入指定个数的数据
//WriteAddr :开始写入的地址 对24c02为0~255
//pBuffer   :数据数组首地址
//NumToWrite:要写入数据的个数
void AT24CXX_Write(AT24CXX *at24cxx,uint16_t WriteAddr,uint8_t *pBuffer,uint16_t NumToWrite)
{
	while(NumToWrite--)
	{
		AT24CXX_WriteOneByte(at24cxx,WriteAddr,*pBuffer);
		WriteAddr++;
		pBuffer++;
	}
}

AT24CXX new_at24cxx(uint32_t scl_gpiox,uint32_t scl_gpio_pinx,uint32_t sda_gpiox,uint32_t sda_gpio_pinx)
{
	AT24CXX temp;
	temp.iic = new_soft_iic(scl_gpiox,scl_gpio_pinx,sda_gpiox,sda_gpio_pinx);
	//temp.Init = AT24CXX_Init;
	temp.Check = AT24CXX_Check;
	temp.ReadOneByte = AT24CXX_ReadOneByte;
	temp.WriteOneByte = AT24CXX_WriteOneByte;
	temp.WriteLenByte = AT24CXX_WriteLenByte;
	temp.ReadLenBytee = AT24CXX_ReadLenByte;
	temp.Write = AT24CXX_Write;
	temp.Read = AT24CXX_Read;
	//temp.Init(&temp);
	return temp;
}