Implementing FreeRTOS into an existing project

[rahmat]

Hi, I am new to FreeRTOS and am planning to change to some of my code routines to FreeRTOS because my code has been expanding and in need of priorities interrupts. I face with a few challenges implementing FreeRTOS (just adding it into the project creates errors. So, I step back and look at the SDK peripheral examples. I found blinky and blinky_freertos examples. I figured if I can implement FreeRTOS into the blinky example, it would be pretty straight forward.

Here is how I did it:
1. Added FreeRTOS source files in the *.emproject
2. Added the nrf_sdh_freertos.c file in the *.emproject
3. Added the FREERTOS tag into preprocessor defines in *.emproject
4.Copied the FreeRTOSConfig.h file from the example
5.Replaced app_timer.c with app_timer_freertos.c

Still, I found this error
FreeRTOS.h: No such file or directory

I was trying to find how the example blinky_freertos refer to the FreeRTOS.h path but I cannot find it.

There seems to be something I'm missing. I need help. Thanks.

Regards,
Rahmat

SETUP: SES, SDK15.0.0, nRF52840-DK

[awneil]

You can't just add an RTOS to a project!

Working with an RTOS requires an entirely different structure & design for your code - it is not a "bolt-on".

This applies to any RTOS on any platform - it is not specific to FreeRTOS, and certainly not specific to Nordic.

rahmat said:

I am new to FreeRTOS

Then you need to spend time to gain familiarity with FreeRTOS.

FreeRTOS is a 3rd-party product - nothing to do with Nordic. Documentation & support here:

https://www.freertos.org/

rahmat said:

in need of priorities interrupts

You can do that without an RTOS

[rahmat]

Thanks awneil, so you're saying even with a simple blinky program, I cannot add FREERTOS and need to create a new project. 

[awneil]

Yes - an RTOS project needs to be designed as such from the outset - it is not a "bolt-on".

Again, this has nothing specifically to do with Nordic; and applies to any RTOS - not just FreeRTOS.