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Thread: Accessing PCI cards in C++

  1. 10-18-2002, 05:15 AM #1
    UncoCow
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    Accessing PCI cards in C++

    OK i'm no C++ expert but i'm writing a simple directX application to watch TV, play mp3s, play DVDs etc...

    My TV tuner card has inbuilt radio tuner, but i don't know how to change the source of the audio from the card to FM.... i presume it's by sending a command to the PCI card (well... the drivers for it). But i'm not sure how to do this?

    I can decompile the program that came with it to get the commands, but how do i send it?

    I sort of figured out how to send it with video for windows, but i HATE that way because it always crashes. Much more stable using direct show... and a lot smoother.. Other than source changing it's all working pretty sweet though

    Still in majorly early beta though, i'm concentrating on getting the video and audio 100% crisp and smooth.... then i'll work on the interface...
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  2. 10-18-2002, 12:07 PM #2
    Mxyzpltk
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    The first thing I would do is check to see if the software that came with the card installed an ActiveX control on your machine. If so, you should be able to import it in your development environment and check out its exposed interface.
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  3. 10-18-2002, 08:58 PM #3
    UncoCow
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    Nah no activeX Control :|

    does anyone know a good decompiler? i don't want the full source code of the app i just want sorta basic outline of what it's calling and with what methods and stuff.... should be able to be done.....
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  4. 10-19-2002, 10:30 AM #4
    Aaron Cake
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    There are various applications that allow you to monitor DLL calls for a process. I would use one to view the software that came with the tuner, and then just program yours to use the same DLL.

    Try ProcessViewer or the like...
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  5. 10-19-2002, 10:34 AM #5
    UncoCow
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    OK thanks mate! just about to fire up google and go searching for that!!!

    does anyone know how to access this? this is the capture device:

    @devicenp:\\?\pci#ven_1131&dev_7134&subsys_01385168&rev_0 1#3&61aaa01&0&68#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global

    i mean i know it's the PCI adress (sumfin like that)

    but dunno how to use it! coz im dumb
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  6. 10-19-2002, 11:17 AM #6
    Rob Withey
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    PCI device enumeration is non trivial. Your best reference is probably the Linux source code. In particular, pciscan.c and pciscan.h. They are linked from (amongst other places) this network driver page: http://www.scyld.com/network/tulip.html

    That pci address you posted contains the vendor id (manufacturer code) and the device id (chip code) which can be used to recognised the card during enumeration. I did this once for a graphics card under VxWorks to get a linear frame buffer, and it's nasty, nasty, nasty.

    I recommend you find yourself a good PCI book to understand the process if you want to go this route.


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  7. 10-21-2002, 01:11 AM #7
    UncoCow
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    if anyone's interested this is what im working on at the moment to go with my black interior..... what you think??



    btw: going to be displayed on xenarc touchscreen
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