detection of a device when plugged through USB port

chaitalil · 04-14-2010, 01:33 AM

can any one tell me detection code of device when an external device is connected through USB port. please help me....

evo2 · 04-14-2010, 01:40 AM

I guess udev is what you are looking for (but since your question is a bit vague I can't be sure).

Evo2.

chaitalil · 04-14-2010, 01:57 AM

Thank you for your suggesion.
Actually i want to know that if a pen drive is plugged in the USB port then how the detection is handeled by the OS. Is there any specific code for detection external device? Can i get that code anyways?

Regrads,
Chaitali Lokhande.

chaitalil · 04-14-2010, 01:59 AM

Quote:

Originally Posted by evo2

I guess udev is what you are looking for (but since your question is a bit vague I can't be sure).

Evo2.

Thank you for your suggesion.
Actually i want to know that if a pen drive is plugged in the USB port then how the detection is handeled by the OS. Is there any specific code for detection external device? Can i get that code anyways?

Regrads,
Chaitali Lokhande.

evo2 · 04-14-2010, 03:37 AM

Hmm, you talk about "OS": perhaps you are referring to the kernel. In that case, hotplug is what you are interested in. The code is in the kernel source.

Evo2.

suuvan · 02-12-2013, 11:11 AM

I guess if I can give you some hint here. Once USP port plug in, the USB controller detect and read low level info like,
VendorID, ProductID then it send to USB-core code, look for it. USB-core will send info to Kernel, Kernel will search, in this case I believe is USB_HID category, for the match ProductIS and VendorID to luanch the driver to handle that specific device.
In your case is Pendrive. From there you can search and go on.... Udev and Udev rules will involve at some point. good luck.

lleb · 02-12-2013, 11:52 AM

what exactly are you trying to accomplish?