MATLAB: Initial Hardware Communication Via USB

dllhardwareusb

Hi, I'm hoping to control a motor with MATLAB via USB. The manufacturer has provided a DLL but I'm really not sure where to go from there. Any help would be appreciated, I'm banging my head on this one.

Paul

Best Answer

You probably need to loadlibrary(). Anything beyond that is going to depend upon the application interface that the manufacturer provided, which you would need documentation for.

Related Solutions

MATLAB: Segmentation violation Error in the MEX file

Full description of error which i got.

------------------------------------------------------------------------
       Segmentation violation detected at Sat Sep 29 10:40:08 2012
------------------------------------------------------------------------
Configuration:
  Crash Decoding  : Disabled
  Default Encoding: windows-1252
  MATLAB License  : XXXXXXXX
  MATLAB Root     : C:\Program Files\MATLAB\R2011a
  MATLAB Version  : 7.12.0.635 (R2011a)
  Operating System: Microsoft Windows 7
  Processor ID    : x86 Family 6 Model 10 Stepping 7, GenuineIntel
  Virtual Machine : Java 1.6.0_17-b04 with Sun Microsystems Inc. Java HotSpot(TM) 64-Bit Server VM mixed mode
  Window System   : Version 6.1 (Build 7601: Service Pack 1)
Fault Count: 1
Abnormal termination:
Segmentation violation
Register State (from fault):
  RAX = 000000003d931200  RBX = 0000000000000000
  RCX = 0000000000000001  RDX = 0000000001719880
  RSP = 0000000001718d60  RBP = 0000000001719760
  RSI = 000000003d936db0  RDI = 0000000001719760
     R8 = 0000000000000003   R9 = 0000000001719760
    R10 = 0000000000000003  R11 = 0000000001719880
    R12 = 0000000001719880  R13 = 0000000035d5ec20
    R14 = 0000000000000003  R15 = 000000006b67fd40
    RIP = 0000000075a25e76  EFL = 00010206
     CS = 0033   FS = 0053   GS = 002b
Stack Trace (from fault):
[  0] 0x0000000075a25e76 C:/Program Files/MATLAB/R2011a/bin/win64/libmx.dll+00024182 ( mxGetM+000006 )
[  1] 0x000007fef61711ee                             F:/TEST/unravel.mexw64+00004590 ( mexFunction+000110 )
[  2] 0x0000000072933333 C:/Program Files/MATLAB/R2011a/bin/win64/libmex.dll+00013107 ( mexRunMexFile+000131 )
[  3] 0x000000007293205f C:/Program Files/MATLAB/R2011a/bin/win64/libmex.dll+00008287 ( inSwapMexfileReader+000223 )
[  4] 0x0000000072932228 C:/Program Files/MATLAB/R2011a/bin/win64/libmex.dll+00008744 ( inSwapMexfileReader+000680 )
[  5] 0x000000006b62f859 C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00063577 ( Mfh_file::dispatch_fh+000473 )
[  6] 0x000000006b62fccf C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00064719 ( Mfunction_handle::dispatch+000767 )
[  7] 0x000000006a5c4f34 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00675636 ( inDestroyWS+409812 )
[  8] 0x000000006a5b25e8 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00599528 ( inDestroyWS+333704 )
[  9] 0x000000006a58a0aa C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00434346 ( inDestroyWS+168522 )
[ 10] 0x000000006a59812b C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00491819 ( inDestroyWS+225995 )
[ 11] 0x000000006a59ab49 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00502601 ( inDestroyWS+236777 )
[ 12] 0x000000006a59de65 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00515685 ( inDestroyWS+249861 )
[ 13] 0x000000006a5b4c73 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00609395 ( inDestroyWS+343571 )
[ 14] 0x000000006a5b4dc0 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00609728 ( inDestroyWS+343904 )
[ 15] 0x000000006a5a624b C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00549451 ( inDestroyWS+283627 )
[ 16] 0x000000006a5a42ac C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00541356 ( inDestroyWS+275532 )
[ 17] 0x000000006a5b1009 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00593929 ( inDestroyWS+328105 )
[ 18] 0x000000006b62f859 C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00063577 ( Mfh_file::dispatch_fh+000473 )
[ 19] 0x000000006b62fccf C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00064719 ( Mfunction_handle::dispatch+000767 )
[ 20] 0x000000006a5a182b C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00530475 ( inDestroyWS+264651 )
[ 21] 0x000000006a59e082 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00516226 ( inDestroyWS+250402 )
[ 22] 0x000000006a5b4c73 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00609395 ( inDestroyWS+343571 )
[ 23] 0x000000006a5b4dc0 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00609728 ( inDestroyWS+343904 )
[ 24] 0x000000006a5a624b C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00549451 ( inDestroyWS+283627 )
[ 25] 0x000000006a5a42ac C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00541356 ( inDestroyWS+275532 )
[ 26] 0x000000006a5b1009 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00593929 ( inDestroyWS+328105 )
[ 27] 0x000000006b62f859 C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00063577 ( Mfh_file::dispatch_fh+000473 )
[ 28] 0x000000006b62fccf C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00064719 ( Mfunction_handle::dispatch+000767 )
[ 29] 0x000000006a5a182b C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00530475 ( inDestroyWS+264651 )
[ 30] 0x000000006a60d99c C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00973212 ( inIsDefinedVariable+019900 )
[ 31] 0x000000006a59f8db C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00522459 ( inDestroyWS+256635 )
[ 32] 0x000000006a5b4c73 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00609395 ( inDestroyWS+343571 )
[ 33] 0x000000006a5b4dc0 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00609728 ( inDestroyWS+343904 )
[ 34] 0x000000006a5a624b C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00549451 ( inDestroyWS+283627 )
[ 35] 0x000000006a5a42ac C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00541356 ( inDestroyWS+275532 )
[ 36] 0x000000006a5b1009 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00593929 ( inDestroyWS+328105 )
[ 37] 0x000000006b62f859 C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00063577 ( Mfh_file::dispatch_fh+000473 )
[ 38] 0x000000006b62fccf C:/Program Files/MATLAB/R2011a/bin/win64/m_dispatcher.dll+00064719 ( Mfunction_handle::dispatch+000767 )
[ 39] 0x000000006a626de8 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01076712 ( inSetPredictor+001000 )
[ 40] 0x000000006a633415 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01127445 ( inInitInterestRegistry+004309 )
[ 41] 0x000000006a635175 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01134965 ( inIsCodeBlockComplete+007445 )
[ 42] 0x000000006a635148 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01134920 ( inIsCodeBlockComplete+007400 )
[ 43] 0x000000006a63510e C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01134862 ( inIsCodeBlockComplete+007342 )
[ 44] 0x000000006a5f8113 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+00885011 ( inGetSeqVarPtrsFromCurrentWS+007315 )
[ 45] 0x000000006a6298e0 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01087712 ( inEvalCmdWithLocalReturn+000304 )
[ 46] 0x000000006a62983c C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01087548 ( inEvalCmdWithLocalReturn+000140 )
[ 47] 0x000000006a6297f1 C:/Program Files/MATLAB/R2011a/bin/win64/m_interpreter.dll+01087473 ( inEvalCmdWithLocalReturn+000065 )
[ 48] 0x0000000079fb833a C:/Program Files/MATLAB/R2011a/bin/win64/libmwbridge.dll+00033594 ( mnDebugPrompt+000106 )
[ 49] 0x0000000079fbd0d2 C:/Program Files/MATLAB/R2011a/bin/win64/libmwbridge.dll+00053458 ( mnParser+000418 )
[ 50] 0x00000000749ab604   C:/Program Files/MATLAB/R2011a/bin/win64/mcr.dll+00243204 ( mcrInstance::mnParser_on_interpreter_thread+000036 )
[ 51] 0x000000007498ed24   C:/Program Files/MATLAB/R2011a/bin/win64/mcr.dll+00126244 ( DepfunRules::postWarning+045636 )
[ 52] 0x000000007498edb1   C:/Program Files/MATLAB/R2011a/bin/win64/mcr.dll+00126385 ( DepfunRules::postWarning+045777 )
[ 53] 0x0000000001b89676   C:/Program Files/MATLAB/R2011a/bin/win64/uiw.dll+00366198 ( UIW_IsUserMessage+000086 )
[ 54] 0x0000000001b89d44   C:/Program Files/MATLAB/R2011a/bin/win64/uiw.dll+00367940 ( ws_ProcessPendingEventsWaitForWindows+000356 )
[ 55] 0x00000000774d87fe                     C:/Windows/system32/USER32.dll+00165886 ( GetMenuBarInfo+000638 )
[ 56] 0x00000000774bf5fb                     C:/Windows/system32/USER32.dll+00062971 ( SystemParametersInfoW+000235 )
[ 57] 0x00000000774c4895                     C:/Windows/system32/USER32.dll+00084117 ( IsProcessDPIAware+000465 )
[ 58] 0x0000000077961225                      C:/Windows/SYSTEM32/ntdll.dll+00332325 ( KiUserCallbackDispatcher+000031 )
[ 59] 0x00000000774c9e6a                     C:/Windows/system32/USER32.dll+00106090 ( SfmDxSetSwapChainStats+000026 )
[ 60] 0x00000000774c615e                     C:/Windows/system32/USER32.dll+00090462 ( GetMessageA+000078 )
[ 61] 0x0000000001b63f07   C:/Program Files/MATLAB/R2011a/bin/win64/uiw.dll+00212743 ( UIW_SetCurrentDialog+000855 )
[ 62] 0x0000000001b8b117   C:/Program Files/MATLAB/R2011a/bin/win64/uiw.dll+00373015 ( ws_FreeSystemFont+000519 )
[ 63] 0x000000006999b7b3 C:/Program Files/MATLAB/R2011a/bin/win64/libuij.dll+00178099 ( sysq::ws_ppeHook::~ws_ppeHook+009539 )
[ 64] 0x000000006999cf3c C:/Program Files/MATLAB/R2011a/bin/win64/libuij.dll+00184124 ( svWS_CommitDatabaseUpdates+002796 )
[ 65] 0x000000006999d97a C:/Program Files/MATLAB/R2011a/bin/win64/libuij.dll+00186746 ( svWS_CommitDatabaseUpdates+005418 )
[ 66] 0x000000006999dbbd C:/Program Files/MATLAB/R2011a/bin/win64/libuij.dll+00187325 ( svWS_CommitDatabaseUpdates+005997 )
[ 67] 0x000000006999ddb8 C:/Program Files/MATLAB/R2011a/bin/win64/libuij.dll+00187832 ( svWS_CommitDatabaseUpdates+006504 )
[ 68] 0x000000006999df10 C:/Program Files/MATLAB/R2011a/bin/win64/libuij.dll+00188176 ( svWS_CommitDatabaseUpdates+006848 )
[ 69] 0x000000007498e28f   C:/Program Files/MATLAB/R2011a/bin/win64/mcr.dll+00123535 ( DepfunRules::postWarning+042927 )
[ 70] 0x000000007498f051   C:/Program Files/MATLAB/R2011a/bin/win64/mcr.dll+00127057 ( DepfunRules::postWarning+046449 )
[ 71] 0x000000007498f37e   C:/Program Files/MATLAB/R2011a/bin/win64/mcr.dll+00127870 ( DepfunRules::postWarning+047262 )
[ 72] 0x000000013f417304 C:/Program Files/MATLAB/R2011a/bin/win64/MATLAB.exe+00029444 ( ???+000000 )
[ 73] 0x000000013f4173d9 C:/Program Files/MATLAB/R2011a/bin/win64/MATLAB.exe+00029657 ( ???+000000 )
[ 74] 0x000000013f4178cb C:/Program Files/MATLAB/R2011a/bin/win64/MATLAB.exe+00030923 ( ???+000000 )
[ 75] 0x00000000773a652d                   C:/Windows/system32/kernel32.dll+00091437 ( BaseThreadInitThunk+000013 )
[ 76] 0x000000007793c521                      C:/Windows/SYSTEM32/ntdll.dll+00181537 ( RtlUserThreadStart+000033 )
This error was detected while a MEX-file was running. If the MEX-file
is not an official MathWorks function, please examine its source code
for errors. Please consult the External Interfaces Guide for information
on debugging MEX-files.
If this problem is reproducible, please submit a Service Request via:
    http://www.mathworks.com/support/contact_us/
A technical support engineer might contact you with further information.
Thank you for your help.** This crash report has been saved to disk as C:\Users\PRAKASH\AppData\Local\Temp\matlab_crash_dump.5208-1 **
Caught MathWorks::System::FatalException
[Please exit and restart MATLAB]>>

MATLAB: How to use the MEX, MCC, and MBUILD commands on a local machine when I have a PC network installation of MATLAB

This error is the result of a conflict between the drive letter specification of the drive where MATLAB is installed and the drive letter specification used at run time. This is usually the result of MATLAB being installed on one computer while it is being accessed over a network from another.

Please try the following to use the MEX, MCC, MBUILD commands on a MATLAB PC network installation:

1.On the network, edit mex.bat and mbuild.bat to add an extra level of indirection in locating MATLAB. You need to change:

set MATLAB=X:\matlab

to:

set MATLAB=%MATLAB%

2. On each computer from which MEX or MBUILD is to be called, add an environment variable called MATLAB and set it to the root directory of MATLAB, relative to that computer. To do this on Windows 95, Windows 98, and Windows ME, edit the autoexec.bat file and add a line similar to the following:

set MATLAB=Y:\matlab

To do this on Windows NT and 2000, right-click on the My Computer icon, select properties, select the Environment tab, and add a MATLAB entry to the System Variables section.

Best Answer

Related Solutions

MATLAB: Segmentation violation Error in the MEX file

MATLAB: How to use the MEX, MCC, and MBUILD commands on a local machine when I have a PC network installation of MATLAB

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