Hello.
I am hobbyist and not a professional PIC developer.

I use the PIC18F14K50 and make small USB devices like joystick controllers,
keyboards...

Everything works well but occasionally some boards are not detected anymore
by the PC and I have to reflash the firmware again to make them work. I
haven't been able to find a cause for this.

The power pins of the pic are directly connected to the power pin of the
usb connector. (there is a bypass capacitor). same think for the D+. D-
pins: connected to the usb wires directly.
I am thinking that maybe I should use some sort of protection on the power
and D+, D- lines, but not sure what to do or if it can help.

Or maybe experiment a little with the configuration bits?

The USB boards uses the Microchip HID bootloader, but I have the impression
this is not related to the problem.

I would be grateful is somebody had a suggestion on how to fix the problem.

Thanks
Cristiano
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