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K-70 USB Device CDC

Question asked by GOWRISHANKAR V on Apr 20, 2012
Latest reply on Nov 20, 2012 by bataliero


Dear all,


I am working with Kinetis K-70(TWR-K70F120M + TWR-LCD) Tower module using CWDS ver10.2 with windows-7 OS


I have try to work USB Device CDC application using Kinetis 120MHz bare metal sample code (KINETIS_120MHZ_SC) and USB Stack ver_3.2


I got an error message in both sample code



USB Device Not Recognized

One of the USB device attached to this computer has

Malfunctioned, and windows does not recognize it.



But MQX ver3.8 USB Device CDC sample code is working fine


We need bare metal sample code


Please suggest what could be the solution for the above error?