AnsweredAssumed Answered

4 USB virtual com port cause blue screen

Question asked by chan.anson.002 on Jul 29, 2014
hi,all
I have 4 boards of stm32f103 with USB virtual com port enable using the VCP library and driver. The main purpose of the USB is to catch running log.So here is the situation:
I plug in 3 boards to PC, and all of them are recognized by PC. But when I plug in the 4th one. The PC gets blue screen.
To be honest, I'm not quite familiar with this USB driver.
Does anyone happen to encounter such case or any thing occurs to your mind?
Many thanks.
Anson

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