I2C—读写EEPROM学习笔记代码详解读写EEPROM完整工程

更新：加入了超时检测，程序更加严谨
其他的主要看下bsp_i2c_ee.c文件里面怎么写入超过一页数据，并地址对齐

void I2C_EE_BufferWrite(u8* pBuffer, u8 WriteAddr, u16 NumByteToWrite)
{
  u8 NumOfPage = 0, NumOfSingle = 0, Addr = 0, count = 0;

  Addr = WriteAddr % I2C_PageSize;//模8的余数
  count = I2C_PageSize - Addr;
  NumOfPage =  NumByteToWrite / I2C_PageSize;//页数
  NumOfSingle = NumByteToWrite % I2C_PageSize;//剩下单页有多少个字节
 
  /* If WriteAddr is I2C_PageSize aligned  */
  if(Addr == 0) //对齐
  {
    /* If NumByteToWrite < I2C_PageSize */
    if(NumOfPage == 0) 
    {
      I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
      I2C_EE_WaitEepromStandbyState();
    }
    /* If NumByteToWrite > I2C_PageSize */
    else  
    {
      while(NumOfPage--)
      {
        I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_PageSize); 
    	I2C_EE_WaitEepromStandbyState();
        WriteAddr +=  I2C_PageSize;
        pBuffer += I2C_PageSize;
      }

      if(NumOfSingle!=0)
      {
        I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
        I2C_EE_WaitEepromStandbyState();
      }
    }
  }
  /* If WriteAddr is not I2C_PageSize aligned  */
  else //如果不对齐
  {
    /* If NumByteToWrite < I2C_PageSize */
    if(NumOfPage== 0) 
    {
      I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle);
      I2C_EE_WaitEepromStandbyState();
    }
    /* If NumByteToWrite > I2C_PageSize */
    else
    {
      NumByteToWrite -= count;//先把当前1页写满，特殊处理
      NumOfPage =  NumByteToWrite / I2C_PageSize;//
      NumOfSingle = NumByteToWrite % I2C_PageSize;	
      
      if(count != 0)//写入前面不满的一页
      {  
        I2C_EE_PageWrite(pBuffer, WriteAddr, count);
        I2C_EE_WaitEepromStandbyState();
        WriteAddr += count;
        pBuffer += count;
      } 
      
      while(NumOfPage--)//写入中间整页
      {
        I2C_EE_PageWrite(pBuffer, WriteAddr, I2C_PageSize);
        I2C_EE_WaitEepromStandbyState();
        WriteAddr +=  I2C_PageSize;
        pBuffer += I2C_PageSize;  
      }
      if(NumOfSingle != 0)//写入最后几个单的数据
      {
        I2C_EE_PageWrite(pBuffer, WriteAddr, NumOfSingle); 
        I2C_EE_WaitEepromStandbyState();
      }
    }
  }  
}

然后看下bsp_i2c_ee.h文件里面显示DEBUG信息，利用了C语言的特性（好像是从linux来的）

#define EEPROM_INFO(fmt,arg...)           printf("<<-EEPROM-INFO->> "fmt"\n",##arg)
#define EEPROM_ERROR(fmt,arg...)          printf("<<-EEPROM-ERROR->> "fmt"\n",##arg)
#define EEPROM_DEBUG(fmt,arg...)          do{\
                                          if(EEPROM_DEBUG_ON)\
                                          printf("<<-EEPROM-DEBUG->> [%s][%d]"fmt"\n",,__FILE__,__LINE__, ##arg);\
                                          }while(0)
//DEBUG 用于显示调试信息 显示文件名，行数，需要自己在里面添加