topic Re: How do you change the priority level of an interrupt? in Kinetis Software Development Kit

How do you change the priority level of an interrupt?

davepfaltzgraff — Sun, 13 Mar 2016 02:46:16 GMT

I am trying to use the xSemaphoreGiveFromISR() routine under FreeRTOS. From what I can tell from the FreeRTOS documentation is that I need to change the hardware priority level to something other than the default in order for this to work.

How can I do this? (Where can I find the appropriate documentation?)

Thanks.

Re: How do you change the priority level of an interrupt?

davepfaltzgraff — Mon, 14 Mar 2016 14:12:22 GMT

Digging through the core_cm4.h file, I found that

NVIC_SetPriority(IRQn_Type IRQn, uint32_t priority)

does what I need. I set the priority level to 7 (anything other than the default of 0) and now I am able to correctly execute the xSemaphoreGiveFromISR() routine.

Re: How do you change the priority level of an interrupt?

joebirch — Tue, 28 Jun 2016 16:10:28 GMT

David

I had this problem too, thanks for the tip

Joe