S32KのトピックRe: Sync_flags occurs when using SMP in multi-core controllers

Sync_flags occurs when using SMP in multi-core controllers

Zyp — Wed, 24 Sep 2025 07:50:29 GMT

hello，NXP’s engineer, when i debug s32K324 some problem occurs. i use the freertos6.0.0 and open SMP ,Sync_flags occurs when using SMP in multi-core controllers.

however , i also write

IP_MC_ME->PRTN0_CORE1_ADDR = (uint32)0x00600000;

IP_MC_ME->PRTN0_CORE1_PCONF = 0x00000001;

IP_MC_ME->PRTN0_CORE1_PUPD = 0x00000001;

IP_MC_ME->CTL_KEY = 0x5AF0U;

IP_MC_ME->CTL_KEY = 0xA50FU;

while (IP_MC_ME->PRTN0_CORE1_PUPD == 1) { };

while ((IP_MC_ME->PRTN0_CORE1_STAT & MC_ME_PRTN0_CORE1_STAT_CCS_MASK) == 0) { };

,so What could be the problem？

Re: Sync_flags occurs when using SMP in multi-core controllers

lukaszadrapa — Thu, 25 Sep 2025 07:47:06 GMT

Hi @Zyp

Isn't that just data cache issue? Did you follow user manual for Freertos package? Here's a screenshot from page 7:

Regards,

Lukas

Re: Sync_flags occurs when using SMP in multi-core controllers

Zyp — Thu, 25 Sep 2025 08:48:47 GMT

I disabled the D_CACHE_ENABLE,but the program is still stuck there.

You can tell me what additional information is needed to solve this problem?

Re: Sync_flags occurs when using SMP in multi-core controllers

Zyp — Mon, 29 Sep 2025 06:10:01 GMT

This is my project,I hope you can help me take a look. I used the method of starting from the kernel in the demo, but I feel that the kernel did not start successfully

Re: Sync_flags occurs when using SMP in multi-core controllers

lukaszadrapa — Tue, 30 Sep 2025 11:57:08 GMT

I can see in your code that core 1 is enabled right in the boot configuration word, so it's started immediately after reset:

However, you are trying to enable core 1 in main function of core 0 again with some delay loop after that:

Isn't this the root cause of your troubles?

Re: Sync_flags occurs when using SMP in multi-core controllers

Zyp — Fri, 10 Oct 2025 00:56:32 GMT

I have tried your method, but it is still stuck in sync_flag. I have a question, does freertos 11.0 only need to use RTD 6.0 version? My version is RTD4.0.

Re: Sync_flags occurs when using SMP in multi-core controllers

lukaszadrapa — Mon, 13 Oct 2025 06:43:25 GMT

It's highly recommended to use RTD version which is mentioned in the release notes file:

Regards,

Lukas