Hi
I have used the same windows driver file with my LPC2387 controller and it
does not show with my device. Also I have used a number of Serial to USBs
with vendor drivers but I have never come across such a device that shows
device removal. I don't think it is something CDC supports but then it
is
only my guess.
On Fri, Mar 23, 2012 at 5:53 AM, PeterStefanos wrote:
> **
> Hello all,
>
> I have been unsuccessfully trying to get DBT_DEVICEARRIVAL and
> DBT_DEVICEREMOVECOMPLETE when listening to WM_DEVICECHANGE messages in
> Windows when I plug and unplug my USB device. The USB device has been made
> to look like a COM port and comes up as COM9 on my computer.
>
> I have done the following:
>
> 1. Built a USB device (LPC2148 micro), used the LPCUSB USB stack
> 2. I have used the usbser.sys driver and a usbser.inf file that I modified
> for my requirements and it happily installs under Windows XP/7/7-64bit,
> although it isn't signed.
> 3. Wrote a simple application and registered for notification using
> RegisterDeviceNotification().
> 4. If I plug in a commercially available USB to serial device, I get the
> DBT_DEVICEARRIVAL and DBT_DEVICEREMOVECOMPLETE message types successfully.
>
> With my USB device, I have been only getting wParam = DBT_DEVNODES_CHANGED
> which is less than useful.
>
> Can anyone tell me where I might have done wrong? I did this years ago and
> have reluctantly come back to try and solve it. I have seen posts in other
> news groups of developers having the same issues but no solution.
>
> Could it be the way the driver was installed or is it some missing value
> in the one of the USB descriptors? We purchased a USB vendor id and I
> thought that this would fix it! It didn't...
>
> Any help would be most appreciated.
>
> Peter.
>
>
>
--
With Regards,
Nishant Agrawal