FreeRTOS support

[mchacher]

Hi, while browsing the web I have been able to compile a project (not tested yet) with FreeRTOS. I would like to leverage SMP / dual core capability of the RP2040.

• Is it fully supported with current implementation with capability to assign tasks to the 2 cores and enable Queue communication between the tasks?
• Can you confirm that the "official" platformio is not supporting FreeRTOS?
• To use FreeRTOS I have changed platformio.ini file like this. Although I have understood that Arduino IDE is supporting FreeRTOS. Can you clarify a bit the panorama and confirm that wwhat I did is correct?

Thanks a lot.

; with FreeRTOS support
[env:pico]
platform = https://github.com/maxgerhardt/platform-raspberrypi
; platform = raspberrypi
board = pico
framework = arduino
board_build.core = earlephilhower

vs.

; without FreeRTOS support
[env:pico]
platform = raspberrypi
board = pico
framework = arduino

[mchacher]

Adding to my previous post, I have a compilation issue on a large project that I don't understand.

<command-line>: error: expected identifier before numeric constant
/Users/mchacher/.platformio/packages/framework-arduinopico/cores/rp2040/RP2040Support.h:155:7: note: in expansion of macro 'RP2040'
  155 | class RP2040;

I am working with platformio / vscode on MacOS. Looking at the file RP2040Support.h it looks like this file is old, and not in sync https://github.com/earlephilhower/arduino-pico.

I wonder whether my setup is correct.

Thanks for your support.

[maxgerhardt]

FreeRTOS should be fully working in the Arduino-Pico core per https://arduino-pico.readthedocs.io/en/latest/freertos.html with the exact first platformio.ini in your original post. If not, please post the exact project files.

Make sure you have a reasonable fresh copy of everything by doing

rm -rf /Users/mchacher/.platformio/packages/framework-arduinopico
rm -rf /Users/mchacher/.platformio/platforms/raspberrypi*

On the other Arduino core (https://github.com/arduino/ArduinoCore-mbed) as supported by the standard platform, there is the RTX5 RTOS. Not FreeRTOS, but equivalently capable of starting threads. Whether that's possible on the second core, idk, since I don't work that much with that core, so you'll have to ask https://github.com/arduino/ArduinoCore-mbed/issues.

[AgainPsychoX]

Is there maybe good write up about differences between Arduino-Pico (aka earlephilhower version) and PlatformIO supported one, the ArduinoCore-mbed? Or anything you suggest I should read/look up?