Thread: USB Connect

  1. #1
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    Mar 2009

    Question USB Connect

    This might be in the wrong section but the title of this section is "Network/Device Communication" and I figured a USB device is a device.... I have only seen network posts in this section.

    So my question is how could I connect to a USB device (i.e mouse) and send it raw data in c/c++(I am using unix)?


  2. #2
    spurious conceit MK27's Avatar
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    Jul 2008
    segmentation fault
    Quote Originally Posted by CorX View Post
    So my question is how could I connect to a USB device (i.e mouse) and send it raw data in c/c++(I am using unix)?
    I've never used real unix but I am pretty sure the filesystem, etc, is almost identical to linux, which means devices generally have a device node (a special file type) in the /dev directory. You can try writing and reading from these as if they were normal files, however, the kernel is in charge and knows what is and is not an appropriate action -- eg, if you try and write something to the mouse, that will probably fail.

    USB devices are controlled with bytecode/text, but it is not in a computer programming language, and the devices do not have the capacity to interpret C or C++. Unless they were made to do that, which would be very unusual; what is it specifically you are trying to do?
    C programming resources:
    GNU C Function and Macro Index -- glibc reference manual
    The C Book -- nice online learner guide
    Current ISO draft standard
    CCAN -- new CPAN like open source library repository
    3 (different) GNU debugger tutorials: #1 -- #2 -- #3
    cpwiki -- our wiki on sourceforge

  3. #3
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    Mar 2009
    Sweet, thanks that makes perfect sense.

  4. #4
    and the hat of int overfl Salem's Avatar
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