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Ext WD resetting the system when patted in PIT's ISR

Question asked by Krishna D on Nov 14, 2017
Latest reply on Nov 22, 2017 by Mark Butcher

We are using K22FN1M0AVLQ12 processor from NXP for our product and running a bare metal software written in C  language. We have external watchdog to monitor the system with a timeout of 60msec, the internal watchdog is not being used.

The external watchdog is patted at 1ms internal in PIT interrupt service routine.

When we enable the external watchdog and pat it in PIT ISR it is resetting the system.

If we pat the watchdog anywhere else it works fine but the moment we pat it in PIT's ISR as said above the external WD resets the system.

 

Kindly help us out on this.

 

Thanks & Regards,

-Krishna

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