USB HID Serial Number

[davekelly]

V3.249, PIC 18F4550

I have a hid application, which is working fine.

My system will use several of these device simultaneously, so I want to use the serial number feature to identify each interface.

I can add the serial number manually in the descriptor code, but instead I would like to read the string from eeprom, so that I don't need a different version of firmware for every device.

I am struggling to find the location where the descriptors are sent, so that I can intercept at this point and replace the serial number string with the values as read from eeprom.

Anyone done something similar, or know a better approach?

[Bcox]

Hello all,
No one ever replied to this post. i am actually in the same boat as this. I have created an HID device and have the possibility of having multiple of these devices connected to one computer. Right now, I am able to communicate with two devices through my host program on my PC but cannot distinguish which one is which. I could easily serialize these using the #serialize command and have my host program distinguish which device is which by requesting the device to send the serial number to it. Perhaps this will be a better option for me also.

I would like to know if there is a way to set the usb serial number in the descriptor code for a HID device. i am using the usb_desc_hid.h file and modifying to suit my needs. What I can't tell is if using the HID class, the serial number is only defined by Windows and cannot be physically set in the PIC.

I am using a 18F4550 with Compiler V.4.06

Thanks for your help!

[davekelly]

I did actually come up with a solution to this, although I subsequently abandoned HID and went to virtual comms instead.

I am just leaving for the day, but will try to dig out what I did next week and post

[3PO]

I have the same problem.
How to set serial number on my HID device ?

[ELCouz]

3PO since you have problem using the forum search button let's search together okay ?

The second item in the list

and then you have this also:

Third item

ouch that was hard !!!