K82: ARM errata 838869 and SysTick handler

[EugeneHiihtaja]

Hi !

I can see _DSB() entry  in almost all interrupt handlers for fix errata case.

But not in TickTimerHandler in FreeRTOS port.c:

void xPortSysTickHandler(void)
{
   uint32_t ulDummy;

   ulDummy = portSET_INTERRUPT_MASK_FROM_ISR();
   {
   /* Increment the RTOS tick. */
      if (xTaskIncrementTick() != pdFALSE)
      {
         /* Pend a context switch. */
         portNVIC_INT_CTRL_REG = portNVIC_PENDSVSET_BIT;
      }
   }
   portCLEAR_INTERRUPT_MASK_FROM_ISR(ulDummy);

// ???

}

Even if I unroll all macros, _DSB is not visible.

Or errata is not effect special handlers ?

By the way, do you have idea when new SDK will be released  with new FreeRTOS 10.1.0 for K82 ?

Regards,

Eugene

[victorjimenez]

Hello Eugene,

DSB is used before ISR return only if ISR's last operation is accessing peripheral registers.

Regarding your other question, we don't have a date for the release of the SDK with the new version of FreeRTOS. 

Hope it helps!

Victor.

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