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Hey all,
I have several projects that I want to complete that involve USB devices. I was wondering if there is any generic way to grab the output and input to any USB device.
I'm not looking for anything too clean, just something that works for the moment, as I will spend time adjusting the method to my various projects.
At any rate, is there a generic way to access the output and input of any USB device in windows? (or even just grab the output?)
thanks,
- legit
legit-tech.net
I'm moving this post from the MFC/C++ forum (if an admin wants to remove that other post to prevent duplicate posts that'd be great!)
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legit wrote: I was wondering if there is any generic way to grab the output and input to any USB device.
No, there isn't. USB is not a port, like serial or parallel. It's a BUS, just like the PCI bus you stuff cards into inside the machine. Communicating with any device on the bus requires you to go through the interface supplied by the drivers for that device.
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Oh, Ok, thanks for explaining that, makes since now. Always wondered why USB was so different.
- thanks
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I have a couple of USB boxes which support performing digital and analogue I/O.
They didn't come with drivers (and as I run FILEMON when I install stuff, I can be reasonably sure of that!). However, there is an API library supplied to communicate with the hardware.
Presumably this uses a standard MS-supplied driver to provide user-mode access to allow tx/rx of requests/replies sent to the devices?
Steve S
Developer for hire
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You need the documentation on that SDK, otherwise, it's useless. That SDK is your only method of communication with the devices.
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I appreciate that (and I have, and use, the documentation), but my point is that it must be using some user-level mechanism which does not depend on a manufacturer-specific driver, instead using some generic way of communication. My next obvious step would be to run Depends on the supplied DLL, and see what it loads that I don't recognise.
Steve S
Developer for hire
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Steve S wrote: but my point is that it must be using some user-level mechanism which does not depend on a manufacturer-specific driver,
That's what the device's SDK is for. There are no "generic" communication methods with any USB devices.
Steve S wrote: My next obvious step would be to run Depends on the supplied DLL, and see what it loads that I don't recognise.
Depends can tell you what functions a .DLL exports and will give you the function names, but it can NOT give you the number of parameters and the data types of those parameters. The only thing that can give you that is the docs on the SDK.
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Dave Kreskowiak wrote: Depends can tell you what functions a .DLL exports and will give you the function names, but it can NOT give you the number of parameters and the data types of those parameters. The only thing that can give you that is the docs on the SDK.
Very true, and in this case, since it also gives the names of functions that the DLL imports, it can tell you that it's using SETUPAPI functions, and functions from HID. The latter is what the library appears to be using for communication. However, we're now well off the original poster's track, although I may come back at a much later date with an article on how the supplied DLL does it's USB communication without a specific device driver 
Steve S
Developer for hire
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Steve S wrote: although I may come back at a much later date with an article on how the supplied DLL does it's USB communication without a specific device driver
Sure, with the SETUPAPI, a bunch of DeviceIo calls, and the documentation on what the device's commands and responses are. It's generic, but only to a point. Eventually, you have to get into the specifics of the device.
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Is this a windows supplied API? or did it come with the devices?
Also, is there documentation for it?
thanks
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It came with the device, and comes with documentation on it, but not how the underlying DLL itself works.
Steve S
Developer for hire
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kamleshkumaragrawal wrote: after re installing Windows98,it is not working
Alright, all you indian guys listen-the-f***-up. If you need drivers for your machine, YOU HAVE TO KNOW SPECIFICS. Chances are that you will need to know the brand and model number of your MOTHERBOARD, especially if you have onboard hardware like sound cards, video, and ethernet. Once you find out what motherboard you have, chances are pretty good that you'll be able to use google to find your drivers.
WE CANNOT HELP YOU BECAUSE WE DON'T KNOW THE INFORMATION I DESCRIBED ABOVE, SO STOP ASKING.
Here's the super-secret url for google - http://www.google.com
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
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hi frnds i am using intel pentium 3 processor
800MHz vth windows sp2,can any one provide me sound drivers for this configuration.....
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anilkumarcse wrote: can any one provide me sound drivers for this configuration.....
No, because a processor does not dictate the drivers to use. The sound card in your machine does. Without knowing that, your guess is as good as ours.
The sound card can be just that, a seperate card you have to plug into a slot, or it can be built onto the motherboard, in which case, you'll have to get out the manual on it or consult the manufacturers website for the specs on the sound chip being used.
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please let us know the details of the make of your motherboard as well if it is having built in or additional Sound Card. Please stop making a fool of yourself by posting half cooked informations.
please checkout what he has written in the thread below which is just a few above yours...
Audio driver for intel 810 chipset John Simmons / outlaw programmer
Please have some common sense. Nobody here would be able to assume the details on their own. you must give them by yourselves. and one more thing. Do some homework atleast before coming here. Google the problem first then resort to us.
There are only two kinds of people who are really fascinating-people who know absolutely everything, and people who know absolutely nothing.
Oscar Wilde (1854-1900)
Regards...
Shouvik
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which Motherboard u have
The Stifler
--
Bugs can neither be created nor be removed from software by a developer. They can only be converted from one form to another. The total number of bugs in the software always remain constant.
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hi frnds am strucked vth my pc when i started my pc it was nt showing bios, even i pressed del key many times,if any of u people know solution for this prob plzzzz answer me ........
Thank'q'
Arvind
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Do u still have the manual to the mobo? It might tell the Key combination to load up BIOS beside the Del key. Does Windows still boot up? Do u see anything on the screen. I would check all these things.
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Are you somehow impaired? Is it too much to expect people NOT to use texting abbreviations?
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
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please refrain from using SMS language. this is not your Girlfriends Cell.
There are only two kinds of people who are really fascinating-people who know absolutely everything, and people who know absolutely nothing.
Oscar Wilde (1854-1900)
Regards...
Shouvik
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Hello.
I'm trying to figure out how to determine on which disk is Windows installed. I need to do this so that I can get additional infos afterwards about it, like Model Number, Serial Number, etc.
I don't need the partition letter (C:, etc), that's easy to get, but on which disk that partition is located (Primary Master (\\.\PhysicalDrive0), Primary Slave (\\.\PhysicalDrive1), etc).
Also, I don't want to use WMI.
Any help is greatly appreciated. Thanks alot.
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Hi,
Anyone have any idea where I can find these monitors. I am looking for these kind for a long time, but none of them are VGA compatible (only RCA). I want a VGA display anywhere between 3" to 4.5" LCD.
thanks,
-Pavan
Pavan
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I saw some in media center cases at Fry's in a silverstone case. Check the website.
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