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8.2.2, Atmel SAM V71, ISR API

Posted by atiflz on September 1, 2015

I cannot use any kind of inter process communication from ISR. All of these functions cause a lock up on my setup:

vTaskNotifyGiveFromISR xQueueSendFromISR xSemaphoreGiveFromISR

What can I do to have any kind of synchronization my tasks with interrupts except polling global variables?

Atilla Filiz


8.2.2, Atmel SAM V71, ISR API

Posted by richard_damon on September 1, 2015

Those functions are what you are supposed to be using. When things lock up, what is it locked up in, could it be a configASSERT? Perhaps your ISR is set to use too high of a priority.


8.2.2, Atmel SAM V71, ISR API

Posted by atiflz on September 2, 2015

Indeed it was the interrupt priorities for GPIOs. The examples do not set any IRQ priorities, so I guess they stay at default 0.

I proppose calling

PIOInitializeInterrupts(configMAXSYSCALLINTERRUPTPRIORITY + 1)

or similar at the beginning of main().


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