vTaskNotifyGiveFromISR not waking up the task

cjedic wrote on Thursday, June 02, 2016:

I am calling “ulTaskNotifyTake( pdTRUE, portMAX_DELAY )” from a function called by a task. I get to the interrupt routine consistantly and I do a “vTaskNotifyGiveFromISR( xdmacChannelNotification[i], NULL );” but the isr never finishes and never gets back to the function where it did the take. Is there anything I can check for configuration? Any clues?

rtel wrote on Thursday, June 02, 2016:

Is xdmacChannelNotification[i] a valid task handle? Step into the vTaskNotifyGiveFromISR() function in the debugger to see what it does, and where it goes.

Regards.

cjedic wrote on Thursday, June 02, 2016:

it has asserted at this line in vPortValidateInterruptPriority()

configASSERT( ucCurrentPriority >= ucMaxSysCallPriority );

edwards3 wrote on Thursday, June 02, 2016:

The interrupt priority is not valid, see http://www.freertos.org/RTOS-Cortex-M3-M4.html

cjedic wrote on Thursday, June 02, 2016:

Turns out I had the priority of the interrupt too high. lowering made it work.