Stuck in DefaultISR at Startup in startup_MK22F51212.s

marks · ‎07-27-2016

Hi, Using K22F-FRDM with KDS 3.2.0 and KSDK 1.3.0. Trying to put together a customer demo that shows how to synchronize ADC conversions with an FTM. I got is working with IAR as the compiler and using KDS/PE for the low level configuration but the customer only has access to KDS. So trying to do it all with KDS. Attached is my project. Any idea why this is stuck during startup? I disabled the Watchdog. But it seams to be running WDOG_EMW_IRQHandler(). I tried this trick to disable NMI but no change:

Modify the Flash Configuration field to disable NMI capability:

Default Flash Configuration:

.section .FlashConfig, "a"

.long 0xFFFFFFFF

.long 0xFFFFFFFE

Modified Flash Configuration to disable NMI (FOPT[NMI]=0):

.section .FlashConfig, "a"

.long 0xFFFFFFFF

.long 0xFFFFFBFE

Screen shot:

Also, It does occasionally get past this and works well but just one out of 20 attempts or so.

Thanks for the help!

Mark

Original Attachment has been moved to: Pulse_Gen.zip

jeremyzhou · ‎07-29-2016

Hi,

What's the issue going on now?

I've not encountered the issue yet.
Have a great day,
Ping

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marks · ‎07-29-2016

I don't know why the programs gets stuck in the default interrupt handler. Try running the program and you will see. Why does it get stuck there?

Thanks,

Mark