6410 iic 读写有关问题

6410 iic 读写问题
网上说6410的iic驱动有些问题，根据网上的资料修改了一下驱动后，用网上下载的一个exe测试程序随便读写都没有任何问题，网址如下：http://download.csdn.net/source/1488970
后来我自己研究下驱动后，根据自己的理解写了一个测试的代码，可以读写，但是读写的数据很不正常。代码如下：请做过的高手指点错误：


DWORD
HW_WriteRegisters(
  PUCHAR pBuff, // Optional buffer
UCHAR StartRegs,
  DWORD nRegs // number of registers
  )
{
UCHAR tmpbuf[512];
  DWORD dwErr=1;
  DWORD bytes;
  IIC_IO_DESC IIC_Data;
   
tmpbuf[0]=StartRegs;
memcpy(&tmpbuf[1],pBuff,nRegs);
   
  IIC_Data.SlaveAddress = CAMERA_WRITE;
  IIC_Data.Count = nRegs;
  IIC_Data.Data = tmpbuf;
   
  // use iocontrol to write
  if ( !DeviceIoControl(hI2C,
  IOCTL_IIC_WRITE, 
  &IIC_Data, sizeof(IIC_IO_DESC), 
  NULL, 0,
  &bytes, NULL) ) 
  {
  dwErr = 0;
  }  


  return dwErr;
}

DWORD
HW_ReadRegisters(
  PUCHAR pBuff, // Optional buffer
  UCHAR StartReg, // Start Register
  DWORD nRegs // Number of Registers
  )
{
  DWORD dwErr=1;
  DWORD bytes;
  IIC_IO_DESC IIC_AddressData, IIC_Data;

  IIC_AddressData.SlaveAddress = CAMERA_WRITE;
  IIC_AddressData.Data = &StartReg;
  IIC_AddressData.Count = 1;
   
  IIC_Data.SlaveAddress = CAMERA_WRITE;
  IIC_Data.Data = pBuff;
  IIC_Data.Count = 1;
   
  // use iocontrol to read  
  if ( !DeviceIoControl(hI2C,
  IOCTL_IIC_READ, 
  &IIC_AddressData, sizeof(IIC_IO_DESC), 
  &IIC_Data, sizeof(IIC_IO_DESC),
  &bytes, NULL) ) 
  {
  dwErr = 0;
  }  

   
  return dwErr;
}

int _tmain(int argc, _TCHAR* argv[])
{
DWORD i;
UCHAR bufin[100];
UCHAR bufout[100];
DWORD nbyte=100;
DWORD bytes;
UCHAR StartAddr=0x2;
UINT32 IICClock = 412500;
  UINT32 uiIICDelay;
for(i=0;i<100;i++)
bufin[i]=0;

bufin[0]=0x5;

hI2C = CreateFile( L"IIC0:",
GENERIC_READ|GENERIC_WRITE,
FILE_SHARE_READ|FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, 0, 0);
if ( INVALID_HANDLE_VALUE == hI2C ) 
{
  MessageBox (0,TEXT("Open Error!"),NULL,MB_OK);
  return FALSE;
  }
else
{
MessageBox (0,TEXT("Open !"),NULL,MB_OK);
}

if ( !DeviceIoControl(hI2C,
  IOCTL_IIC_SET_CLOCK, 
  &IICClock, sizeof(UINT32), 
  NULL, 0,
  &bytes, NULL) ) 
  {
  RETAILMSG(1,(TEXT("IOCTL_IIC_SET_CLOCK ERROR: %u \r\n")));
  return FALSE;
  }  
  uiIICDelay = Clk_5;

  if ( !DeviceIoControl(hI2C,
  IOCTL_IIC_SET_DELAY, 
  &uiIICDelay, sizeof(UINT32), 
  NULL, 0,
  &bytes, NULL) )
{
  RETAILMSG(1,(TEXT("IOCTL_IIC_SET_DELAY ERROR: %u \r\n")));