IWR6843ISK: Mss reset status check

Han Wang

Part Number: IWR6843ISK

Hi, I tried to view the MSS reset status by using MSS_RCM->RSTCAUSE register. However, regardless of power-on reset and watchDog reset, the status is 0010_0000(32) when I viewed before soc_init() or 0 when I viewed in _system_pre_init()。
I also tried to use ptrRTIBRegs->RTIWDSTATUS, and it didn't work either.
What is the reason for this? If I want to distinguish between the two status, what methos can I achieve.
Here is the code and result.

code when I viewed before soc_init:

int main (void)
{
RCMRegs* ptrRCMRegs;
TOPRCMRegs* ptrTOPRCMRegs;

ptrRCMRegs = (RCMRegs*)gSOCHwAttrib.rcmBaseAddress;
ptrTOPRCMRegs = (TOPRCMRegs*)gSOCHwAttrib.topRcmBaseAddress;

rcm_rstStatus = CSL_FEXTR(ptrRCMRegs->RSTCAUSE, 7U, 0U);
toprcm_rstStatus = CSL_FEXTR(ptrTOPRCMRegs->SYSRSTCAUSE, 3U, 0U);
rcm_softrst3 = CSL_FEXTR(ptrRCMRegs->SOFTRST3, 7U, 0U);

SBL_init();
return 0;
}

result:

rcm_rstStatus:32 toprcm_rstStatus:0 rcm_softrst3:173

code when I viewed in _system_pre_init() :

void _system_pre_init(void)
{
RCMRegs* ptrRCMRegs;
TOPRCMRegs* ptrTOPRCMRegs;

ptrRCMRegs = (RCMRegs*)gSOCHwAttrib.rcmBaseAddress;
ptrTOPRCMRegs = (TOPRCMRegs*)gSOCHwAttrib.topRcmBaseAddress;
rcm_rstStatus = ptrRCMRegs->RSTCAUSE;
toprcm_rstStatus = ptrTOPRCMRegs->SYSRSTCAUSE;
rcm_softrst3 = ptrRCMRegs->SOFTRST3;

return;
}

result:

rcm_rstStatus:0 toprcm_rstStatus:0 rcm_softrst3:24

over 2 years ago

0 Pedrhom Nafisi over 2 years ago

TI__Mastermind 23347 points

Hello,

Please give me time to look into this.

Best Regards,

Pedrhom

0 Han Wang over 2 years ago in reply to Pedrhom Nafisi

Prodigy 10 points

Thanks for your attention to this question!

In addition, I have also tried to access the ptrRTIBRegs->RTIWDSTATUS register. However, there is a problem when directly accessing it (wdStatus = ptrRTIBRegs->RTIWDSTATUS) in the main function after a restart, and it must be done after the SOC_enableWatchdog(gSblMCB.socHandle, &errCode) function call. But after doing so, the value of wdStatus is 0 and cannot distinguish between watchdog reset and power-on reset.

Later, I tried to access wdStatus in the _system_pre_init function, but still failed.

If I want to use the value of wdStatus to distinguish between watchdog reset and power-on reset, is it feasible? If so, how can I do it?

I eagerly await your reply!

0 Han Wang over 2 years ago in reply to Pedrhom Nafisi

Prodigy 10 points

Hi,

Do you have any conclusions regarding the use of these registers?

Is there a problem with my usage method? If so, what modifications do I need to make.

Eagerly await your reply!

0 Pedrhom Nafisi over 2 years ago in reply to Han Wang

TI__Mastermind 23347 points

Hello,

Sorry this thread seemed to slip through the cracks. Expect better response times from this post onwards. I want to ask what your goal of this MSS reset status check is and what you are trying to accomplish. Is there a reason you are not doing power cycles for resetting? More context will help me understand what you are trying to do and provide a different solution if needed.

Best Regards,

Pedrhom Nafisi

0 Han Wang over 2 years ago in reply to Pedrhom Nafisi

Prodigy 10 points

I have resolved my issue on the forum:
IWR6843ISK: MSS 复位状态判断 - 传感器论坛 - 传感器 - E2E 设计支持 (ti.com)
Thank you for your help!

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IWR6843ISK: Mss reset status check