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How to determine current context type - interrupt or task

Posted by luhu on September 21, 2014

Hello,

Searched a little but didn't found answer.

Is there some function or other method in FreeRTOS that allows to determine if program is currently in interrupt or process context? I want to implement a function that will use xQueueSend. But that function might be called both from process or interrupt and I would like to avoid creating another version of that function which will use xQueueSendFromISR.

Best Regards, Michal


How to determine current context type - interrupt or task

Posted by rtel on September 21, 2014

Which port are you using?

Regards.


How to determine current context type - interrupt or task

Posted by luhu on September 21, 2014

I am using LPC4330 MCU and base on examples from lpcopen.

Best Regards, Michal


How to determine current context type - interrupt or task

Posted by rtel on September 21, 2014

In which case I think you can ask the hardware for the context as follows:

if( ( portNVICINTCTRLREG & 0x1F ) == 0 )
{
    /* Not in an interrupt. /
}
else
{
    / In an interrupt. */
}
(portNVICINTCTRLREG is already defined, assuming you are using GCC as you mention lpcopen).

Regards.


How to determine current context type - interrupt or task

Posted by luhu on September 21, 2014

Thanks for fast reply. Will try this.


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