Working with USB Devices

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Hi,

I am currently trying to build an application that would program a device through DFU. I have an application programming interface with all the functions and methods I need, my problem is that the API is in C++, I am trying to translate it to C# but I am having a hard time understanding what I need to do. Currently I am able to identify all the usb devices connected to the pc,this link turned out to be very helpful, now I need to get the Symbolic link to the device according to the API guide I found. I am not sure what they mean by symbolic link.

Another question I have is the handle of the device is the device ID or the PnpID?

I know they are very basic concepts, but I am having a hard time to understand them, if you could point me to a tutorial, or article explaining what I need to know I would gladly appreciate it.

Thanks.

Posted 30-May-12 9:03am

nanomass

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Solution 2

The SerialPort class is great for this: http://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx[^]. also see http://www.developerfusion.com/article/84338/making-usb-c-friendly/[^]

Posted 30-May-12 14:27pm

Clifford Nelson

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El_Codero · Accepted Answer · 2012-05-30T09:47:00

Hi,

a symbolic link is a link to a folder/directory within your file system (NTFS,FAT32,ext2,3, ...).
So in this case the symbolic link to your device could be to i.e. I:\ (the device letter of your USB Mass Storage Device).

To Device ID's and PNP-ID's:
All Plug n' Play (so...PNP) devices must contain a deviceID in order to allow the OS to uniquely recognize the device to load the correct driver for this device, the PNP-ID is a combination of the Vendor-ID and device-ID.

Here is a great libraries,infos and examples you can easily work with:

A USB HID Component for C#[^]

http://sourceforge.net/projects/libusbdotnet/[^]

http://www.developerfusion.com/article/84338/making-usb-c-friendly/[^]

Enumerate and Auto-Detect USB Drives[^]

A USB Library to Detect USB Devices[^]

Unfortunately I don't know what you mean with "that would program a device through DFU."
There are several ways to communicate with RAS/DFU, depends how much code you want to write by yourself.

Using RASAPI32.dll by P/Invoke:
http://www.pinvoke.net/default.aspx/rasapi32.rasdial[^]

Easy-To-Use Library:
http://dotras.codeplex.com/[^]

Much Information, more specified questions are always welcome after your research process ;)

Regards

PS: You don't necessarily need to use a C++ API to achieve this.