The program stopped working

[palikem]

Hi everybody.

What am I doing wrong.

Code: Select all

static const wxChar *LIB_NAME = _T("MCP2210DLL-UMx86.dll");

wxDynamicLibrary dll;

dll.Detach();
dll.Load(LIB_NAME);

typedef void (*MyFunc)(unsigned int, unsigned int);
	
MyFunc myfunc = (MyFunc) dll.GetSymbol("DllInit");
myfunc(0x04D8, 0x00DE);
    

[doublemax]

Impossible to tell from a distance. First you should add proper error checking to your code.
Check the return value of wxDynamicLibrary::Load(). If it's false, the DLL could not be loaded.
Check the return value of wxDynamicLibrary::GetSymbol(). If it's NULL, the function was not found in the DLL.

[palikem]

I checked it.
everything is OK.
the program will start, reads dll and also a function.
when I use this feature, it stops responding

[doublemax]

Create a debug build and check where exactly it crashes. If "myfunc" is not NULL and it crashes inside the function call, the parameters you're passing are wrong or there is a problem with the DLL itself.

Do you have any documentation for the DLL? I couldn't find anything with Google.

I found this though: http://www.signal11.us/oss/hidapi/
Did you try that approach?

[palikem]

hidapi i tried
Linker many mistakes.
I did not know how to remove it.

[doublemax]

hidapi i tried
Linker many mistakes.

It worked almost out-of-the-box for me. Just add hid.c and hidapi.h to your project. And you need to add Setupapi.lib to your list of libraries. This library should come with the compiler.

[palikem]

"Setupapi.lib" I did not find it

You are reporting this error.

[doublemax]

Sorry, i'm using Visual Studio only and there this line compiles fine.

[PB]

FWIW, I could compile hid.c (hidapi 0.70) with MinGW32 (GCC 5.3) just fine (using CodeLite as testing IDE).

But the source code is different in the part where you reported the error.

FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPWSTR)&msg, 0/*sz*/,
NULL);

[palikem]

Thank you PB.
Fixed issue with HIDAPI.

The original problem with wxDynamicLibrary has not been resolved.
If someone has a good idea how to solve the original problem.

I will be grateful.

[palikem]

Thank you doublemax.

For Setupapi.lib.
Without it it would not work.

[ONEEYEMAN]

Hi,
So the program still crashing even after adding everything to your project?

Thank you.

[palikem]

wxDynamicLibrary are no longer in use in the project.
The program always stops working and closes the.

I use HIDAPI as my doublemax advised me.