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AA.26
AA.26
Visitor II
March 17, 2025
Solved

UART interrupt priority

  • March 17, 2025
  • 2 replies
  • 699 views

Hi Team,

I would like to know which MCU has the highest UART interrupt priority.

Thanks & Regards,
Anbu

 

Best answer by Hl_st

Hello,

UART (USART) interrupt priority is set to 0 (the lowest priority) by default. But it can be easily changed up to the highest priority. It can be changed in code or in CubeMX in NVIC settings:

a.png

 

2 replies

H
Hl_stBest answer
ST Employee
March 17, 2025

Hello,

UART (USART) interrupt priority is set to 0 (the lowest priority) by default. But it can be easily changed up to the highest priority. It can be changed in code or in CubeMX in NVIC settings:

a.png

 

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    Tesla DeLorean
    Tesla DeLorean
    Guru
    March 17, 2025

    The priority and preemption level are usually configurable within the Cortex-Mx core. You should generally make interrupts short and quick, buffering and processing later, or use DMA.

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