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?