Hi seems I am haveing problem no body ever had before!!!
PLEASE HELP !!!!!!!
Using board STM3210C_EVAL , Compiling VCP Demo project for STM3210C_EVAL board (no modifications made to originaly downloaded code)
Latest driver for Virtual comport is installed 22.214.171.124.
Problem looks same on 5 PC running XP and Vista
Problem looks like this!!!
a) Plugging USB cable to PC.
b) Virtual com port detected and all is fine in device manager and com port is open with no problem.
com port can be open and closed as many times as needed until microcontroler reset or usb cable disconnect and reconnect.
a) After disconnect of usb cable or and reconnect
b) port is detected and displayed in device manager
all apears to be normal but opening com port returns error
and it will be not possible to open port until next reset or usb cable plug unplug