[PIC] PIC18F4550 generic HID device not seen by one of the computers

[K33rg4t3]

Hey
I compiled simple BLINK LED by USB example.
The example works well on my every day workstation PC.
But when I plug it to the laptop, it says "unknown device" (error code 43).
What's wrong, am I forgetting some kind of drivers?
I am using USBHIDnetClass.org example HID Read Write Interrupt (EasyPIC v7 for PIC18F4550).

The board conncetions are the following:
- 10k reset resistor
- LED with 1k resistor
- 100nF capacitor between power linse
- 12 MHz crystal (as in the project settings)
- two 22 nF capacitors between crystal pins and GND
And as I said, it works on PC but not on another laptop.
Please help!

 

[Easyrider83]

100nF is not enought. 10uF tantal recomended at least. 100uF better.

 

[K33rg4t3]

100uF added, no changes.

Everything works on PC but laptop still can't recognize the device. Tested multiple USB ports.

Btw: PC is windows XP, and laptop is windows 7 - maybe windows 7 is missing some drivers???

 

[Easyrider83]

Driver for HID a preinstalled in all windows. Try to implement any confirmation that mcu is working like a led blinking if you do not have proper debug option.

 

[K33rg4t3]

MCU is blinking LED, obviously.
As I said - I have USB code which blinks the LED according to Windows application.
It works on PC but doesn't work on laptop.

 

[anandpv2009]

Try uninstall and re-install corresponding USB controller driver.

 

[K33rg4t3]

PROBLEM SOLVED.

THAT WAS A HARDWARE ERROR.
The "VUSB" capacitor was missing (vusb pin for usb supply)
I don't know why one of the PCs recognized the device, it should not work anyway. It was confusing.
The drivers were OK all the time.