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Author Topic: WinUSB Serial Numbers...  (Read 9625 times)

Rh.owen

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WinUSB Serial Numbers...
« on: November 08, 2012, 08:55:40 am »
I am using WinUSB to support a PIC24 based device. It is based around the Microchip highspeed demo application and works quite well so far. I now need to be able to handle more than one device on a single PC and would like to give them unique IDs by including a serial number. Can WinUSB support this? I have tried adding a serial number string to the DeviceDescriptor but that is not enough. In the device properties details page, the Capabilities flags are still only CM_DEVCAP_REMOVABLE. How can I add CM_DEVCAP_UNIQUEID? I cannot even figure out how to read the serial number I have in the descriptor so a hint would be helpful there as well.

Thanks for any help.
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Jan Axelson

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Re: WinUSB Serial Numbers...
« Reply #1 on: November 08, 2012, 09:07:14 am »
One solution is to define a control request to read the serial number.
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Renate

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Re: WinUSB Serial Numbers...
« Reply #2 on: November 23, 2012, 09:58:18 am »
It's always a good idea for devices to have unique serial numbers even if you only have one of them.
Under Windows without a unique ID it will "discover" your device and make new registry entries every time you plug it into a different hub port.
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