MCU-PLUS-SDK-AM243X: Performing warm SW reset of M4 from R5

Himel Saha

Hi,

Currently, I have the AM243x EVM (TMDS243GPEVM). I was trying to perform a warm SW reset of the M4F0-0 core from the R5F0-0 core.
I noticed that there is a function to do this on the SDK documentation (AM243x MCU+ SDK: APIs for SOC Specific Functions):

SOC_generateSwWarmResetMcuDomain()

I tried using this function in my code and noticed that R5F0-0 core also resets. I intend to reset M4 only, but from R5. Is that possible?
May I please know if the intention of the function is to reset all cores, and not just M4? If so, is there a way to reset only M4 from R5?

Any help is really appreciated.

Thank you,

Himel

over 2 years ago

0 Aakash Kedia over 2 years ago

TI__Mastermind 26145 points

Hi Himel Saha,

Please check this function - Bootloader_socCpuResetRelease at this path - <MCU_PLUS_SDK>/source/drivers/bootloader/soc/am64x_am243x/bootloader_soc.c

You need to use this flow to reset the M4F CPU.

Best Regards,
Aakash

0 Himel Saha over 2 years ago in reply to Aakash Kedia

Prodigy 70 points

Hi Aakash,

Thank you for your response. I tried using the function you suggested.
Although the function returns a success, M4 is never reset.

Maybe I am missing something? Do I need to initialize some other module before running this function?

Thanks,

Himel

+1 Aakash Kedia over 2 years ago in reply to Himel Saha

TI__Mastermind 26145 points

Hi Himel Saha,

You need to reset if the device is already enabled like this ? Then you need to use this API - Bootloader_socCpuPowerOnResetM4f. The API I have mentioned releases the RESET if the CPU reset is de-asserted. If its already asserted then there won't be any effect on the same and will return success.

Best Regards,
Aakash

0 Himel Saha over 2 years ago in reply to Aakash Kedia

Prodigy 70 points

I understand. Thank you Aakash!

I seem to be able to reset it now.

Arm-based microcontrollers

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MCU-PLUS-SDK-AM243X: Performing warm SW reset of M4 from R5