AnsweredAssumed Answered

SysTick ISR preemption issue

Question asked by 昶煒 梁 on Nov 21, 2019
Latest reply on Dec 5, 2019 by Alexis Andalon

Hi all,

 

I am working on the K64 and added a PIT timer and system tick to the project.

 

I set the SysTick to trigger every 1ms with priority 0, and the PIT timer with priority 1. And the PriorityGroup is set to 0.

 

 However, I found the SysTick ISR could not preempt the PIT ISR, the SysTick counter doesn't change in the PIT ISR. 

 

I thought the SysTick ISR should be able to preempt other ISRs like timer, uart...

 

Is my understanding run? Or did I miss anything? Any suggestion for let SysTick ISR to preempt other ISR?

 

Thanks!

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