osEventFlagsSet/Get not working in ISR? What am I doing wrong?

[abeowitz]

STM32F407VET6 + STM32CubeIDE + CMSIS_OS2

Latest IDE, w/ FreeRTOS 10.2.1, CMSIS-RTOS 2.00

Touch LCD IRQ on PC_5.

EXTI line[9:5] enabled, code gen enabled, and Call HAL Handler checked.

Event defined. Fails with both dynamic and static Allocation.

Include Param: xEventGroupSetBitFromISR enabled (doesn't work disabled either)

I want to set a flag when the touch interrupt is triggered, then resume a handler thread waiting with osEventFlagsWait().

Anyway, IRQ call succeeds.

but (see comments) 

void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
 
if (GPIO_Pin == Touch_INT_Pin)
   {
     uint32_t flags = 0x00;
     extern osEventFlagsId_t touchEventHandle;
 
     flags = osEventFlagsSet(touchEventHandle, 0x01);
     // ^ returns 0x01, as expected.
 
     flags = osEventFlagsGet(touchEventHandle);
     // ^ returns 0x00, but should be 0x01
 
   }
 
. . .
 
 }

debug tracing shows touchEventHandle points to the same heap location as FreeRTOS set up.

Those Set/Get routines work fine within a thread.

I've traced through debug, but am unable to discern why it's not working as I expect. The Set routine dives deep into queue related code, so do Event bits use queues? The Get routine seems simpler and doesn't.

Thanks,

-Abe

[JiriCep]

I had also the same issue with using osEventFlagsSet() in ISR. The link above helped resolve the issue. It's indeed necessary to change default value ( = 2) of TIMER_TASK_PRIORITY to value:

#define configTIMER_TASK_PRIORITY                configMAX_PRIORITIES - 1

Why CubeMX generate a default value "2" instead of "MAX_PRIORITIES - 1" ?

Any comments from ST people?