Need help with ltp

This is a discussion on Need help with ltp within the C++ Programming forums, part of the General Programming Boards category; Hello I need some help about ltp port. Here's my situation. There is a robot (home made), it connects to ...

  1. #1
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    Need help with ltp

    Hello
    I need some help about ltp port. Here's my situation. There is a robot (home made), it connects to computer through LTP port and i need to wright program to control it. I've got a progie for that. There are 2 exe files. One communicate through ltp and other uses the first one to control robot. But this doesn't works on winXP. I somewhere read that all newer windows doesn't allows programs directly access ports. Seems that ltp is obsolete thing and i can't find nothing useful on net. I found that port handle could be obtained using CreateFile API function but i can't find usable file name. Tried LTP, LTP0, LTP1 and some others but none of these works. Tried COM1 and it works fine. Maybe there is another way for LTP. Actually i have no idea how those ports works and even if i get port handle what should i do next? Does ReadFile/WriteFile are suitable in my case or there are other way for that?

    Thanx in advance.

    Regards

  2. #2
    and the hat of wrongness Salem's Avatar
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    > I somewhere read that all newer windows doesn't allows programs directly access ports.
    Yes, that's correct.

    http://msdn.microsoft.com/library/de...createfile.asp
    Scroll down to "Communications Resources"

    > Tried LTP, LTP0, LTP1 and some others but none of these works
    Probably dyslexia - it would be LPT
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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  3. #3
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    Thanx a lot.
    I've been searching for this at msdn but when u don't realy know what u are searching for u can easily miss it. BTW so how realy that port is called: LTP or LPT

    Regards

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