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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?

 

Thanks,

Prabhu.S

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