EEPROM 读写问题

ReadData可以读，但是WriteData写进去的怎么是乱码呀?用开发板提供的I2C-EEPROM来写进去然后用自己写的上面的一段代码来读是对的，但是WriteData写进去就是乱码！是怎么回事呢？

int CEeprom::WriteData( PUCHAR bData, int iSize)
{
    memset(&IIC_AddressData, 0, sizeof(I2C_IO_DESC));
    IIC_AddressData.SlaveAddr = 0xa0;            //WRITE
    IIC_AddressData.WordAddr = m_StartAddr;        //start addr
    IIC_AddressData.Data = bData;
    IIC_AddressData.Count = iSize;
    for(int i = 0; i < (int)iSize; i++)
        {
            printf("%c\n",IIC_AddressData.Data);
        }
    int Ret = DeviceIoControl(hI2C,IOCTL_I2C_WRITE, &IIC_AddressData, sizeof(I2C_IO_DESC), OutputBuf,iSize,&ReadBytes, NULL);
    if(Ret == true)
        printf("写AT24LC08成功！\n");
    else
        printf("写AT24LC08失败！\n");
    return Result;
}

int CEeprom::ReadData(PUCHAR bData, int iSize)
{
    memset(&IIC_AddressData, 0, sizeof(I2C_IO_DESC));
    IIC_AddressData.SlaveAddr = 0xa1;            //READ
    IIC_AddressData.WordAddr = m_StartAddr;        //start addr
    IIC_AddressData.Data = bData;
    IIC_AddressData.Count = iSize;
    DeviceIoControl(hI2C,IOCTL_I2C_READ, &IIC_AddressData, sizeof(I2C_IO_DESC), OutputBuf, iSize,&ReadBytes, NULL);
    if (!ReadBytes)
    {
        printf("IIC read single data failed !");
    }
    else
    {
        for(int i = 0; i < (int)ReadBytes; i++)
        {
            printf("%c\n",bData);
        }
    
    }
    return Result;
}