Getting error while trying to run USB stack V4.1.1?

[karthikpoojary]

Currently using keil ide I am getting following error while trying to run any demo from USB stack

.\RAM\USB_CDC.axf: Error: L6218E: Undefined symbol asm (referred from main_kinetis.o).

[kerryzhou · Accepted solution]

Hi Karthik Poojary,

  Did you use the MDK project?

  If yes, please add CMSIS in the options define:

Then save the project, and build again, you will find the error have disappeared.

Wish it helps you!

If you still have question, please contact me!

Have a great day,
Jingjing

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