LPC MicrocontrollersのトピックRe: LPC55S69 : FreeRTOS with MPU example

LPC55S69 : FreeRTOS with MPU example

EugeneHiihtaja — Wed, 15 Jan 2020 07:43:35 GMT

Hi !

You have provide very good example of Freertos for LPC55S69 what is run in nonsecure world and task can call secure

world.

But it is not so clear if if privided example can be transformed to case when RTOS running in secure world

and can have nonsecure tasks as it mentioned here:

https://static.docs.arm.com/100689/0200/armv8_m_rtos_desgin_considerations_100689_0200_en.pdf

Case 1 – RTOS in Secure state When a real-time operating system is running in Secure state, threads can be Secure or Nonsecure. It is also possible to have cross-domain API calls between Secure and Non-secure software, which means each thread can have both Secure and Non-secure stack allocation.

Does this case is covered in that port of RTOS what is part of SDK by using minor configuration/modification

OR it require quite massive implementation ?

Regards,

Eugene

Re: LPC55S69 : FreeRTOS with MPU example

xiangjun_rong — Thu, 13 Feb 2020 02:51:17 GMT

Hi, Eugene,

Frankly speaking, I think it is complicated for Freertos to create secure task and insecure task with trust zone and to switch between the secure/insecure task.

Anyway, maybe this ticket is helpful to understand the subject.

https://community.nxp.com/community/general-purpose-mcus/lpc/blog/2019/05/14/freertos-with-preconfigured-example-for-nxp-s-lpc55xx-mcu

XiangJun Rong

Re: LPC55S69 : FreeRTOS with MPU example

bdb — Wed, 29 Jun 2022 13:17:06 GMT

Hi XiangJun,

I am interested in the topic, but the link you posted is now dead. Can you help me retrieve the information that was in there?

Best regards

Benoît