S32K Interrupt Function

[wanglijun]

Hello, I have a question about the interrupt function process: If I don't need interrupt nesting, is there need add disable interrupt at the first of interrupt function, then add enable interrupt at the end of interrupt function? Thank you!

[KalaimaniArumugam]

Hi @wanglijun 

   If you want to interrupt nesting operation from a particular interrupt means you can disable interrupt and again enable it. In case disable all interrupt nesting means disable the CPU interrupt after completing the operation enable the CPU interrupt it will give complete interrupt nesting on the particular operation.

[wanglijun]

Hello, I see in the S32DK interrupt functions, not including the interrupt disable and enable operation. It support interrupt or not? Thank you!

[Robin_Shen]

Hi wanglijun,

Please check the ENABLE_INTERRUPTS() and DISABLE_INTERRUPTS() functions.

Or maybe you can set all interrupts to the same priority.

Best Regards,
Robin
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[wanglijun]

Hello Robbin, In the S32DS provided interrupt function, there is no interrupt disable and enable process. So it means enable interrupt nesting or disable interrupt nesting? Thank you!

[Robin_Shen]

There is no register for enabling or disabling interrupt nesting. In addition, enabling and disabling interrupts is a register of the ARM Cortex core. I suggest you read this article: Cutting Through the Confusion with Arm Cortex-M Interrupt Priorities

[wanglijun]

Hello Robbin, I still can't understand. Does it mean if the interrupt priority is different, there is interrupt nesting? Best Regards, Wang Lijun

[Robin_Shen]

Hi wanglijun,

The default interrupt priority are set to 0, so there should no interrupt nesting happen unless you reconfigure the interrupt priority by using INT_SYS_SetPriority() function.

Best Regards,
Robin