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CMSIS-DAP on KL25Z

Joey Ye
Arm Employee Badge
Note: This was originally posted on 1st March 2013 at http://forums.arm.com

I'm following instructions on http://www.keil.com/appnotes/files/apnt_232.pdf to update firmware on KL25Z to enable CMSIS-DAP, but failed.

The first 6 steps were exactly the same as described. My in step 7, after connected to PC, the green LED just keeps flashig each second, rather than blink once and then stay on. Checking content on the flash the CMSIS-DAP.S19 was just gone.

Did anyone encountered same problem as me? What happenned and how to make it work?

Thanks - Joey
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  • Arm Employee Badge
    Note: This was originally posted on 4th March 2013 at http://forums.arm.com


    Make sure when you cycle the board power after loading the S19 file into the Flash that you do not hold the RESET button down.  This removes the S19 file.

    I did NOT hold or press RESET when I disconnect and reconnect USB cable after S19 is copied. My suspicious is SW1 is broken so that it is always down, does it sound a reasonable guess?
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  • Arm Employee Badge
    Note: This was originally posted on 4th March 2013 at http://forums.arm.com


    Make sure when you cycle the board power after loading the S19 file into the Flash that you do not hold the RESET button down.  This removes the S19 file.

    I did NOT hold or press RESET when I disconnect and reconnect USB cable after S19 is copied. My suspicious is SW1 is broken so that it is always down, does it sound a reasonable guess?
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