PbyFwData - Pointer to the firmware binary data stream.

Question

Hello,
I used labview to call a dll, but it have one parameter "pbyFwData" which Pointer to the firmware binary data stream.i don't understand what mean is "Pointer to the firmware binary data stream".I try to make this parameter point to the firmware path, but the program can't be run.the below is the .dll source code. who can tell you how to pass the value to the parameter "pbyFwData" by labview?
// Purpose:      Public function to download the Flash Preloader.
// Parameter:
//   hZvDev    - Handle of the Zeevo Device.
//   pbyFwData - Pointer to the firmware binary data stream.
//   uFwLen    - The length of the preloader.
// Return value: SUCCESS if successful; Otherwise, the error code.
ZEEVOPTU_API int ZV4301_SendPreLoader(HANDLE hZvDev,
                                      unsigned char *pbyFwData,
                                      unsigned long uFwLen)
   ZV4301 *pZvDev;
   COMM_DESC *pPort;
   int nResult, nTmOut;
   const unsigned long uBlkSize = 0x400;
   unsigned long uDummy, uCRC;
   unsigned char byDataBuf[32];
   unsigned char byData;
   if (!Validate(hZvDev))
      return ERR_BAD_HANDLE;
   pZvDev = (ZV4301 *)hZvDev;
   pPort = pZvDev->PortDesc;
   // Setup the Address and Length
   memset(byDataBuf, 0, sizeof(byDataBuf));
   LD_LoaderProgramAddr(byDataBuf) = LD_ZV4301_LOADER_ADDR;
   LD_LoaderProgramLengh(byDataBuf) = uFwLen;
   // Calculate the Header CRC
   uCRC= UT_CRCBuffer(byDataBuf+4, 8);
   LD_LoaderProgramHdrCRC(byDataBuf) = uCRC;
   // Calculate the Data CRC
   uCRC = CalculateCRC(pbyFwData, uFwLen);
   LD_LoaderProgramDataCRC(byDataBuf) = uCRC;
   // Detect target reset
   nResult = IsChipPwrOnReset(pZvDev, 10000);
   if (nResult != SUCCESS)
      return nResult;
   // send out header first
   nResult = WriteSerial(pZvDev, byDataBuf, LD_LOADER_PRGM_HDR_LEN);
   if (nResult != SUCCESS)
      return nResult;
   while (uFwLen > 0)
   {  // sending the preloader file
      if (uFwLen >= uBlkSize)
         nResult = WriteSerial(pZvDev, pbyFwData, uBlkSize);
         pbyFwData += uBlkSize;
         uFwLen -= uBlkSize;
      else
         nResult = WriteSerial(pZvDev, pbyFwData, uFwLen);
         uFwLen = 0;
      if (nResult != SUCCESS)
         return nResult;
   nTmOut = 100;
   while (nTmOut > 0)
   {  // getting the respond 0xAA
      if (GetByte(pZvDev, &byData))
         if (byData == 0xAA)
            break;
      Sleep(10);
      nTmOut -= 10;
   if (nTmOut == 0)
      return ERR_DOWNLD_PRELDR;
   nResult = SetCommBaud(pZvDev, FLOWCTRL_DIS, pPort->uBaud, &uDummy);
   return nResult;

Answer 1

Hi,
The pointer is a U32 that points to a memory location where the data is. It is not clear from the prototype whether the pointer points to data that is feeded to the dll, or returned from the dll.
If data is feeded, wire an array to this parameter, and set uFwLen to it's length.
If data is returned, you need to use some other api calls to get the data from memory...
Regards,
Wiebe.
"Jimmy168" <[email protected]> wrote in message news:[email protected]...
Hello,I used labview to call a dll, but it have one parameter "pbyFwData" which Pointer to the firmware binary data stream.i don't understand what mean is "Pointer to the firmware binary data stream".I try to make this parameter point to the firmware path, but the program can't be run.the below is the .dll source code. who can tell you how to pass the value to the parameter "pbyFwData" by labview?
&nbsp;
//------------------------------------------------------------------------------// Purpose:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Public function to download the Flash Preloader.// Parameter://&nbsp;&nbsp; hZvDev&nbsp;&nbsp;&nbsp; - Handle of the Zeevo Device.//&nbsp;&nbsp; pbyFwData - Pointer to the firmware binary data stream.//&nbsp;&nbsp; uFwLen&nbsp;&nbsp;&nbsp; - The length of the preloader.// Return value: SUCCESS if successful; Otherwise, the error code.//------------------------------------------------------------------------------ZEEVOPTU_API int ZV4301_SendPreLoader(HANDLE hZvDev,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; unsigned char *pbyFwData,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; unsigned long uFwLen){ &nbsp;&nbsp; ZV4301 *pZvDev;&nbsp;&nbsp; COMM_DESC *pPort;&nbsp;&nbsp; int nResult, nTmOut;&nbsp;&nbsp; const unsigned long uBlkSize = 0x400;&nbsp;&nbsp; unsigned long uDummy, uCRC;&nbsp;&nbsp; unsigned char byDataBuf[32];&nbsp;&nbsp; unsigned char byData;
&nbsp;&nbsp; if (!Validate(hZvDev))&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return ERR_BAD_HANDLE;&nbsp;&nbsp; pZvDev = (ZV4301 *)hZvDev;&nbsp;&nbsp; pPort = pZvDev-&gt;PortDesc;
&nbsp;&nbsp; // Setup the Address and Length&nbsp;&nbsp; memset(byDataBuf, 0, sizeof(byDataBuf));&nbsp;&nbsp; LD_LoaderProgramAddr(byDataBuf) = LD_ZV4301_LOADER_ADDR;&nbsp;&nbsp; LD_LoaderProgramLengh(byDataBuf) = uFwLen;&nbsp;&nbsp; // Calculate the Header CRC&nbsp;&nbsp; uCRC= UT_CRCBuffer(byDataBuf+4, 8);&nbsp;&nbsp; LD_LoaderProgramHdrCRC(byDataBuf) = uCRC;&nbsp;&nbsp; // Calculate the Data CRC&nbsp;&nbsp; uCRC = CalculateCRC(pbyFwData, uFwLen);&nbsp;&nbsp; LD_LoaderProgramDataCRC(byDataBuf) = uCRC;&nbsp;&nbsp; // Detect target reset&nbsp;&nbsp; nResult = IsChipPwrOnReset(pZvDev, 10000);&nbsp;&nbsp; if (nResult != SUCCESS)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return nResult;&nbsp;&nbsp; // send out header first&nbsp;&nbsp; nResult = WriteSerial(pZvDev, byDataBuf, LD_LOADER_PRGM_HDR_LEN);&nbsp;&nbsp; if (nResult != SUCCESS)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; return nResult;
&nbsp;&nbsp; while (uFwLen &gt; 0)&nbsp;&nbsp; {&nbsp; // sending the preloader file&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (uFwLen &gt;= uBlkSize)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; nResult = WriteSerial(pZvDev, pbyFwData, uBlkSize);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pbyFwData += uBlkSize;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; uFwLen -= uBlkSize;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; else&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; nResult = WriteSerial(pZvDev, pb