How to use heap_useNewlib ?

[jbrud]

Hi,

previously I updated the SDK to Version 2.7 and I noticed the new FreeRTOS heap "heap_useNewlib" implementation. After reading Dave Nadlers blog post(Thanks for that !) and as I use Newlib, I would like to switch. But I wondering how it is meant to use it with MCUXpressoSDK. My first idea was drop in heap_useNewlib.c file and add new number in FreeRTOSConfig.h for example configFRTOS_MEMORY_SCHEME 6.

But this conflicts with NXP's FreeRTOS extension freertos_tasks_c_additions.h which checks configFRTOS_MEMORY_SCHEME > 5  at line 53.  It's clear I could just modify the SDK sources to get it working but that is what I want to avoid. Any advises ?

Additionally there is a uppercase lowercase mistake in heap_useNewlib.c. It tries to inlcude #include "freeRTOS.h"  it should be #include "FreeRTOS.h".

Thanks !

[davenadler]

j.bruder‌ - Typo fixed and a few other updates on github (you'd need to merge NXP's LD symbols.
configFRTOS_MEMORY_SCHEME does not come into play; do not define it.
Hope that helps,
Best Regards, Dave

[np]

Hi Johannes,

The heap_newlib thing has its roots in Dave Nadler's page here: newlib and FreeRTOS  I'd recommend reading this to understand why using NXP's heap_newlib() is probably a good idea.

There's a comment here (from July 2020) that may answer your issue: https://mcuoneclipse.com/2020/05/31/tutorial-adding-freertos-to-where-there-is-no-freertos/#comment-...

Cheers, Nick

[jbrud]

Any news here ?

[danielchen]

From what I know, this issue will be fixed  in version sdk 2.9, since this fix will be involved with IDE team and FreeRTOS team.

Regards

Daniel

[jbrud]

@NXP Any feedback here ?

[danielchen]

Thanks Johannes , there seems an issue here. Let me consult with develop and let you know the results.

Regards

Daniel

[Pavel]

It looks like your SDK is not SDK for PowerPC or Layerscape processors.

NXP offers Yocto Linux BSP SDK 2.7 for PowerPC or Layerscape processors.

https://source.codeaurora.org/external/qoriq/qoriq-components/yocto-sdk/about/

Have a great day,
Pavel Chubakov

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[jbrud]

I'm working on a MK64F12, which is a ARM Cortex-M4 and the SDK is generated by NXP's MCUXpresso SDK Builder.

 

What do you mean ?