topic Interrupt enable in MPC5xxx

Interrupt enable

mehmetkaradag — Fri, 07 Apr 2023 07:21:23 GMT

Dear All,

I use MPC5777C.

if priority register of any interrupt is zero ,does that indicate the corresponding interrupt is disabled? Because your INT_SYS_EnableIRQ function is just doing set the priority register of corresponding ISR. I have seen that all interrupts that i have used is 1 the priority register of corresponding ISR and Interrupts i have not used is 0 the priority register of corresponding ISR.

I hope someone can help me, thank you.

Re: Interrupt enable

petervlna — Tue, 11 Apr 2023 07:01:14 GMT

Hello,

Simply follow reference manual:

if priority register of any interrupt is zero ,does that indicate the corresponding interrupt is disabled?

It is not disabled, but wont be served by INTC to prevent situation described above.

Simply said. If you want interrupt to reach the core, then you need to set its priority higher than 0.

Best regards,

Peter