S32KのトピックRe: S32K358 Sema42

S32K358 Sema42

Chase1234 — Fri, 22 Sep 2023 12:27:30 GMT

Hello,

I am attempting to disconnect the XRDC from the Sema42 logic. It says in the code that the DomainID will return to the the CoreId is the RM is not present. Is there any way to safely execute the semaphore logic from the rm module without activating the XRDC. Tresos gives errors when the Semaphore is activated without the XRDC.

Re: S32K358 Sema42

Nhi_Nguyen — Tue, 03 Oct 2023 03:44:51 GMT

Hi @Chase1234 ,

It is impossible to enable Sema4 without XDRC enabled. As description:

Domain ID managed by XDRC.

Best regards,

Nhi

Re: S32K358 Sema42

Chase1234 — Wed, 04 Oct 2023 12:00:14 GMT

@Nhi_Nguyen

I guess my follow up question would be based on the Sema42_Ip.c file line 184. In the Sema42_Ip_LockGate_Privileged function, It states the following:

I took that to mean that the DomainID would revert to the CPUID if the XRDC was not enabled to manage the DomainID. Is that just a mistake in the description or am I just completely mistaken about the implications based off of this statement?

Thanks,

Joseph

Re: S32K358 Sema42

Nhi_Nguyen — Fri, 06 Oct 2023 06:59:22 GMT

Hi @Chase1234 ,

I think about Semaphore as description below:

Semaphore used to prevent multiple Domains access to memory/Peripheral in same time. XDRC used to manage these Domains. But, if just only one Domain used, Semaphore is unnecessary to use. From this, driver is handling to configure XDRC is mandatory when enable Sema42.

In driver, XDRC is always used when want to lock gate without any guarding.

Best regards,

Nhi

Re: S32K358 Sema42

sobo — Thu, 20 Feb 2025 11:49:07 GMT

Hello,

I want to used SEMA42 for multicore so I need to configure XDRC.
I used EB TRESOS but I don't know how to configure XDRC just to used SEMA42.
I use RTD 4.0.0 P20 D2403.
In EB Tresos we must declare a XRDC Peripherical Config , that I don"t need.

Do you have some info or example ?

Sophie

Re: S32K358 Sema42

Nhi_Nguyen — Mon, 24 Feb 2025 08:23:21 GMT

Hi @sobo ,

It is impossible to use Sema42 without Peripheral and Memory configuration for current driver.

Best regards,

Nhi