Functions for USB in C#

[robokid]

It is easy with lpt and C++ to access port
by using some functions and DLL lib
So if we use USB and C# and xp windows
Is there like thos functions?

 

[jakjoud]

Functions for USB

sure There are atr least with C++

 

[JB]

Re: Functions for USB

Hi,
For example I use a Dll for parallelport access and this is needed for/in VC++ : (part of the code to get the idea)

// in Par.h Header:
typedef void (WINAPI *PORTOUT) (short int Port, char Data);
typedef char (WINAPI *PORTIN) (short int Port);
typedef short int (WINAPI *ISDRIVERINSTALLED)();
extern PORTOUT PortOut;
extern PORTIN PortIn;
extern ISDRIVERINSTALLED IsDriverInstalled;
// for loading dll
extern int LoadIODLL();

// in Par.cpp:
PORTOUT PortOut;
PORTIN PortIn;
ISDRIVERINSTALLED IsDriverInstalled;
HMODULE hio;
int LoadIODLL()
{
	hio = LoadLibrary("CS");         // loads CS.dll
	if (hio == NULL) return 1;
        PortOut = (PORTOUT)GetProcAddress(hio, "PortOut");
        PortIn = (PORTIN)GetProcAddress(hio, "PortIn");
        IsDriverInstalled = (ISDRIVERINSTALLED)GetProcAddress(hio, "IsDriverInstalled");
        atexit(FreeLibrary(hio));
}

Your USB dll can be accessed in a likewise way.

(If you want, I can mail you the total working example.)

Hope this helps,
Jeroen

 

[mamu_s]

Functions for USB

HI JB, CAN YOU UPLOAD THE USB DLL OR YOU CAN EMAIL TO ME?

 

[popoyboys]

Re: Functions for USB

can you email me the code too?

 

[mhamed]

Functions for USB

your certainly will find this web very useful:
http://www.lvr.com/
there, you can find every thing about computer ports (USB, parallel, Serial) including books and codes
His books was free as i remember, if you could not find it let me know to upload it here.
I should emphesize that using USB is not as easy as parallel or serial port. you need an IC for interefece. search on USB ICs as well.