topic Re: K21 Tower Kit not booting in Kinetis Microcontrollers

K21 Tower Kit not booting

abbian — Tue, 02 Sep 2014 22:05:57 GMT

Hi All -

I am developing a K21 application. My code will run fine if I download and debug from within the IAR debugger, but it will not boot on it's own.

Any ideas?

Thanks

Re: K21 Tower Kit not booting

Kan_Li — Wed, 03 Sep 2014 03:06:39 GMT

Hi Dan,

Would you please specify the tower board version? Is it the TWR-K21F120M? and it would be better that you could send your code for a review.

Thanks for your patience!

Have a great day,
B.R
Kan

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Re: K21 Tower Kit not booting

abbian — Wed, 03 Sep 2014 16:29:42 GMT

Hi Kan -

I'm using the TWR-K21F120M. My code is based on the gpio example in the tower sample code. If I specify the 512KPflash linker file in the gpio project and download it using the Jlink the board will boot into the gpio code. When I do the same with my code it hangs unless I start it in the debugger.

What is the best way to send you my code?

Dan

Re: K21 Tower Kit not booting

Kan_Li — Thu, 04 Sep 2014 07:03:24 GMT

Hi Dan,

That looks like a software issue, so you may attach your project here, and I will try to reproduce this issue with my TWR-K21F120M. Thanks for your patience!

Have a great day,
B.R
Kan

Re: K21 Tower Kit not booting

abbian — Thu, 04 Sep 2014 21:22:56 GMT

Hey Kan

I found the problem - the watchdog was not being disabled at startup.

Dan