Running USB Dev Kit Virtual Com Port demo on Keil MCBSTM32

emann · ‎2008-04-04

Posted on April 04, 2008 at 11:14

emann · ‎2011-05-17

Posted on May 17, 2011 at 12:28

When I run the Virtual Com Port demo and connect the Keil board to the PC, Windows installs an ''unknown USB device'' which has the following device instance ID:

USB\VID_0000&PID_0000\5&1B4CAF5C&0&2

Can anyone suggest what I need to change to get this demo to work?

Thanks.

[ This message was edited by: emann on 01-04-2008 18:57 ]

paulsmitton9 · ‎2011-05-17

Posted on May 17, 2011 at 12:28

emann,

Check how far the stm32 gets using a debugger.

If you find where it gets stuck then that may

give some clue.

Also, the MCBSTM32 has a different line (PD2) to

disconnect the USB, so check that that port is

configured okay or tied to ground using the jumper

if it isn't used in the example (i.e. not floating).

Paul.