Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem TCP & FAT




Loading

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.


[ Back to the top ]    [ About FreeRTOS ]    [ Sitemap ]    [ ]




Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News

FreeRTOS kernel V10 is available for immediate download. Now MIT licensed.


FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

IAR Partner

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

STMicro RTOS partner supporting ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0

Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers

OpenRTOS and SafeRTOS