Freescale Kinetis writing to .vectors flash section

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Chris Hogan

• February 05, 2014 05:39

I'm trying to disable NMI on a Freescale K10 by modifying the Kinetis_Startup.s file and changing the FOPT .byte from 0xff to 0xfc.  It isn't working.  The verification after download fails, showing the differences as the byte I'm trying to modify.  For some reason, it's not making it into the flash.

 

Any idea what I could be doing wrong?

 

I'm using a Segger J-Link for programming.

 

I found some information about IAR Studio being able to write to this area with a setting change (https://community.freescale.com/thread/311660).  Hoping there's a similar feature in CrossStudio.

 

Thanks,

Chris

 

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  Chris Hogan

  • February 07, 2014 15:13

  For anyone interested in the answer, Michael responded to a ticket I entered.  Here's his answer:

  You'll need to rebuild the loader with the ALLOW_FCF_WRITE define set.

  I have tried it and it works.

   

  Thanks Michael!

   

  Chris

   

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