Windows IoT


Change Driver Being Used?


Hello All,
We're working with a hardware bumpbar* for our current application, and we're noticing some odd behavior with it. When we use it with a Raspberry Pi 2 or 3, we see that the input repeats.
Example: I press the down arrow on the bumpbar, and our application will be spammed by an infinite number of down presses until we interrupt it with another key press. However, when we do the exact same test and use the Dragonboard, it
works flawlessly.
At the end of day, the bumpbar should be able to function as a standard USB keyboard. So I've been digging into the devices on my Rpi3 to see what may be going on. I've managed to come up with the following three device entries, the first for the
standard USB keyboard and the next are what appear when I plug in the bumpbar.
USB Keyboard:
HID\VID_03F9&PID_0100\6&1117E0C3&0&0000
Name: Key Tronic USB Keyboard
Hardware IDs:
HID\VID_03F9&PID_0100&REV_0102
HID\VID_03F9&PID_0100
HID\VID_03F9&UP:0001_U:0006
HID_DEVICE_SYSTEM_KEYBOARD
HID_DEVICE_UP:0001_U:0006
HID_DEVICE
Logic Control Bumpbar:
HID\VID_0FA8&PID_C280&MI_01\7&18F1AF3C&0&0000
Name: HID-compliant mouse
Hardware IDs:
HID\VID_0FA8&PID_C280&REV_0263&MI_01
HID\VID_0FA8&PID_C280&MI_01
HID\VID_0FA8&UP:0001_U:0002
HID_DEVICE_SYSTEM_MOUSE
HID_DEVICE_UP:0001_U:0002
HID_DEVICE
HID\VID_0FA8&PID_C280&MI_00\7&12E22F7&0&0000
Name: HID Keyboard Device
Hardware IDs:
HID\VID_0FA8&PID_C280&REV_0263&MI_00
HID\VID_0FA8&PID_C280&MI_00
HID\VID_0FA8&UP:0001_U:0006
HID_DEVICE_SYSTEM_KEYBOARD
HID_DEVICE_UP:0001_U:0006
HID_DEVICE
I realize that the KB1700 isn't on the approved hardware list (https://developer.microsoft.com/en-us/windows/iot/win10/supportedinterfaces#Miscellaneous) but I'm wondering if it's possible to somehow tell Win10IoT to use a different hardware profile for the
bumpbar device? Is there a utility that I'm missing that would let me change the hardware IDs for the bumpbar to match the basic USB keyboard?
Thanks for help or direction that anyone could provide.
*Logic Controls KB1700
(http://bematechus.com/products/peripherals/programmable-keyboards/kb1700/)
Hi Dallas,
Potentially this is not a driver issue but could be a USB stack issue. From the IoT Dev:
The simple difference is that USB stack on RPi is from MCCI and on Dragonboard it is from Qualcomm.
Here is what I suggest – try it with MBM, which uses USB stack from Microsoft. If that programmable keypad works fine with MBM, then issue is RPi specific and go from there.
USB protocol analyzer would certainly help to capture the problematic situation and then check is it keyboard get stuck with key or USB stack on RPi2 cannot clear key event.
I doubt they need to reprogram device descriptor.
I hope that helps!
Sincerely,
IoTGirl
Hi There,
Thank you for the report. The Raspberry Pi and Dragon use different USB stacks and drivers, so there is likely a compatibility issue. We do not have this device in house.
Would it be possible for you post a raw USB trace from both the Dragon and the Pi using a protocol analyzer?
A hardware based solution like a Beagle (http://www.totalphase.com/products/beagle-usb12/) would be required so you can monitor traffic from your development machine for traffic occurring between the USB device and the IoT Core device.
If you are not able to, could you post a method for us to acquire such device?
Thanks,
Lou
Hi there,
We are acquiring unit to test this out.
Thanks for the report,
Lou

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