S32KのトピックRe: s32k144 interrupt service routine processing case

s32k144 interrupt service routine processing case

SW_Park — Thu, 11 Jan 2024 00:26:47 GMT

hello. I ask the question as follows.

During PORTE_IRQHandler operation by PTE15 interrupt,

How is it handled when a PTE16 interrupt occurs?

After completing the PORTE_IRQHandler operation, is the PORTE_IRQHandler function called again?

Otherwise, it is expected that missing or duplicate processing will occur.

-> If there is no re-call, it is thought that PTE16 interrupt processing will be missed.

-> If PORTE_IRQHandler is called again when a PTE16 interrupt occurs, it is thought that problems will occur due to duplicate processing of code.

Re: s32k144 interrupt service routine processing case

Senlent — Thu, 11 Jan 2024 03:15:22 GMT

Hi@SW_Park

yes, it will call PORTE_IRQHandler again.

Re: s32k144 interrupt service routine processing case

SW_Park — Thu, 11 Jan 2024 04:28:45 GMT

I think it would be correct to put the INT_SYS_DisableIRQGlobal / INT_SYS_EnableIRQGlobal functions at the top and bottom of the PORTE_IRQHandler function, respectively, to pending other interrupts during IRQ processing, and to handle the pending interrupt after IRQ processing is completed.

tell me your opinions.

Re: s32k144 interrupt service routine processing case

Senlent — Thu, 11 Jan 2024 04:40:08 GMT

Hi@SW_Park

I don't think it is necessary since the process sequence is still the same.

if you have in doubt this, you can make some test for your options.

Re: s32k144 interrupt service routine processing case

SW_Park — Thu, 11 Jan 2024 05:03:57 GMT

Does this mean there is no "Pre-emption" because the group priority is the same?

Re: s32k144 interrupt service routine processing case

Senlent — Thu, 11 Jan 2024 06:25:32 GMT

Hi@SW_Park

for all pins of PORTx share one Vector Address, so these is no difference in priority