21ic电子技术开发论坛 › 已关闭版块 › 驱动开发|WIN编程 › DeviceIoControl向虚拟U盘写数据失败的问题

DeviceIoControl向虚拟U盘写数据失败的问题

楼主| elego 发表于 2013-10-15 14:28 | 显示全部楼层 |阅读模式

写64字节以下可以，超过64字节就返回121L（0x79)的错误.
查看该错误的定义，如下：
"#define ERROR_SEM_TIMEOUT             121L"
操作代码如下：
BOOL CIOCtrlHelper::CDBWriteData(HANDLE hDevice, BYTE *pDataBuffer, long nBufLen)
{
ULONG returned,length;
DWORD dwErrCode;
BOOL status;

ASSERT(pDataBuffer);

SCSI_PASS_THROUGH_DIRECT_WITH_BUFFER sptdwb;
ZeroMemory(&sptdwb,sizeof(SCSI_PASS_THROUGH_DIRECT_WITH_BUFFER));
sptdwb.sptd.Length = sizeof(SCSI_PASS_THROUGH_DIRECT);
sptdwb.sptd.PathId = 0;
sptdwb.sptd.TargetId = 1;
sptdwb.sptd.Lun    = 0;
sptdwb.sptd.CdbLength = IOCTRL_CDB_LEN;
sptdwb.sptd.SenseInfoLength  = 14;
sptdwb.sptd.DataIn = SCSI_IOCTL_DATA_OUT;
sptdwb.sptd.DataTransferLength = nBufLen;
sptdwb.sptd.TimeOutValue  = IOCTRL_TIMEOUT_VALUE;
sptdwb.sptd.DataBuffer = pDataBuffer;
sptdwb.sptd.SenseInfoOffset =
  offsetof(SCSI_PASS_THROUGH_WITH_BUFFERS,SenseBuf);
memcpy( sptdwb.sptd.Cdb, m_byCDBBuffer, IOCTRL_CDB_LEN );

length = sizeof(SCSI_PASS_THROUGH_DIRECT_WITH_BUFFER);

status = DeviceIoControl(hDevice,
      IOCTL_SCSI_PASS_THROUGH_DIRECT,
                           &sptdwb,
                           length,
                           &sptdwb,
                           length,
                           &returned,
                           NULL);
dwErrCode = GetLastError();
if( dwErrCode == 0x79 ) // Timeout
{
}
if( !status )
  return FALSE;
else
  return TRUE;
}

回复赏