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11 years, 5 months ago.
MBED USB HID fails to detach after unplug USB cable
I downloaded the handbook USB HID sample program to MBED and used HID API on Windows XP PC.
It was all working: read/write feature report, etc.
Then I unplug the USB cable, somehow the Windows HID device driver (as displayed in Control Panel/Device Manger/Human Interface/HID-compliant device) doesn't disappear (detach).
When I re-plug in the USB cable, now I am not able to talk to MBED via HID API (hidtest program) any more.
I have to restart my computer to go back to the initial state.
Anyone has similar experiences?
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It seems like my exe crashes during the earlier test. It probably fails to release hid_device handle. So it's more like an operating system issue, not directly related to MBED though.
posted by Zhe Hu 13 Jun 2013