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Win-7 and USB-CDC

Question asked by Ole Asbjorn Fadum on May 6, 2015
Latest reply on May 6, 2015 by David E Seymour



I'm working on a FRDM-K64 with a USB-CDC sw. After some problems I'm now able to sometimes get it to connect to my PC and communicate.

For the moment I'm using Win-7, TeraTerm and the FRDM-K64.


When I stop my target windows removes the serial port, (pling-plong) and TeraTerm disconnects.

When restarting the target windows re-connects the serial port, (pling-plong), but often the serial-port is not visible to TeraTerm,

(COM-24 is not visible in the COM drop-down list). The Computer --> Manage --> Device Manager shows COM-24 as OK and working.


I've tried to disconnect the COM-24, and re-connect. The re-connect typically ends in an infinite loop, and I have to re-boot my PC.


How am I supposed to do development work on the CDC device???