lpcware

LPC1347 Virtual Serial issue under Windows 8 and 8.1

Discussion created by lpcware Employee on Jun 15, 2016
Content originally posted in LPCWare by riedlse on Sun Nov 03 07:46:38 MST 2013
Thought I would post this in case anyone else ran in to the same issue. I'm using an LPC1347 with the virtual serial sample code and the device was working fine on USB 2 ports everywhere and on most USB 3 ports. On certain Dell laptops though it would not work, I had a Driver could not start (Code 10) error. After a few days of tracing the issue, I found a windows 8 USB trace utility and saw a "Device Qualifier Descriptor Failed" message. It seems this is used for USB 2.0 to set the High Speed. I then went to the virtual serial sample descriptor and notices it was calling the device a USB 2.0 device instead of a 1.1. Switched that to 0110 and life is good.

I did have some other errors that were fixed by loading the latest Intel chipset driver (rev 7 C216 or something like that)

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