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Linux - Embedded & Single-board computer This forum is for the discussion of Linux on both embedded devices and single-board computers (such as the Raspberry Pi, BeagleBoard and PandaBoard). Discussions involving Arduino, plug computers and other micro-controller like devices are also welcome.

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Old 05-01-2011, 05:31 PM   #1
Paweł
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Registered: Jan 2011
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I can't identify correct USB node


Hi guys!
How can I use nodes /dev/usbdevX.X_epXX to open, write and read over USB in C language programming ? How can I recognize valid node ? I need this to connect two SBC ARM9 boards via USB. In desktop linux, it's recognized via cdc_acm driver and it appear as /dev/ttyACM0 and work perfectly!
 
Old 05-03-2011, 02:58 PM   #2
rylan76
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Registered: Apr 2004
Location: Potchefstroom, South Africa
Distribution: Fedora 17 - 3.3.4-5.fc17.x86_64
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Erm, not sure if it will help, but have you tried / looked at libusb?

It seems as if the writer(s) of the Linux drivers for the X-Box USB gamepad used this quite successfully to do something similar to what you want to do... you might do well to look at their code as well.

Also, take a look at the MAME project's source for interfacing with the /dev/input/ tree - MAME works 100% with a USB X-Box gamepad.

E. g. my reasoning is that if you take a look at the above, you might at least find a starting point to how they identify which nodes contain the USB X-Box game controller... and how you might be able to identify the nodes you need for your devices.
 
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Old 05-09-2011, 04:17 PM   #3
Paweł
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Oh yeah! Thanks for indicate this library. This information help me. One more time thanks.
 
  


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