On 8/22/06, Xiaofan Chen <xia...@gm...> wrote:
> I have a little cute MCU programmer Microchip PICKit 2 and I beta
> tests alternative driving programs using libusb under Linux and Windows.
> Under Windows I need to use libusb-win32 device driver.
>
> It runs fine for my home desktop under Windows XP professional
> SP2 in Singapore (along with various versions of Linux). For more
> detail, please refer to the following posts.
> http://forum.microchip.com/tm.aspx?m=110205
>
> Now I am under training in USA and I only has access to the corporate
> desktop running Windows XP SP2. I have one problem now.
>
> Normally PICkit 2 will appear under device manager as two
> device: "HID-compliant device" and "USB Human Interface Device".
>
> And it did appear as two device initially and I could also use the
> Microchip provided Windows program (using native Windows
> HID driver) to run it.
>
> Then I was trying to "update" the native HID driver to the device driver
> generated by libusb-win32 (1stly the 20060518 version and then
> the 0.1.10.1 version). Somehow it failed. This was working for my
> desktop at home.
>
> And then I have a major problem now: PICkit 2 only
> appears as a "HID-compliant device" inside device manager
> instead of both "HID-compliant device" and "USB Human Interface
> Device". The Microchip PC application still works. But I am not
> able to test the libusb based application since I am not able to
> install the libusb-win32 device driver.
>
> I know I can not use the filter driver due to the fact that this
> PICkit 2 has dual configurations (HID and custom). We had
> a discussion on this last year when I was trying to port the
> libusb based Linux application to Windows with libusb-win32.
>
> This is kind of stranger. Is there a reason why an HID device
> only has one entry in the device manager?
>
> Sorry for the long email.
>
Note I could only "update" the driver using the entry
"USB Human Interface Device" but not the entry
""HID-compliant device" before.
As described in my Microchip Forum post, the procedure
to switch the driver to libusb-win32 device driver is the following.
*****************************
Step 1: Go to Device Manager, verify that under
Human Interface Devices there are two PICkit 2 related device (HID-compilant
device and USB Human Interface Device). You know that through the details
tab (Device Instance Id: VID_04D8&PID_0033\xxx).
Step 2: Right click "USB Human Interface Device" and select "Update Driver..."
Choose No to the Windows update question and click Next.
Choose "Install from a list of specific location Advanced" and click Next.
Choose "Don't search. I will choose the driver to install" and choose Next.
Choose "Have Disk" and browse to the device driver directory
"C:\Program Files\libusb-win32-device-bin-0.1.10.1\bin"
and select pickit2.inf. Pickit2 should be in the Model text box.
Ignore the warning "This driver is not digitally signed". (MS will most likely
not sign an LGPL/GPLed driver). Select Pickit 2 and click Next.
Windows will install the driver.
********************************
Regards,
Xiaofan
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