STM32H7 dual core: FreeRTOS & Timer selection for each core

[HDesa.1]

Hello,

I am using STM32H7 dual core series. Currently I am planning to enable FreeRTOS in M4 core and let M7 core run in regular fashion.

As FreeRTOS uses SysTick, I have given M4 core on of the controller timer. Is there any need to also give M7 core a different timer? As M7 core is not running FreeRTOS, can it continue running on SysTick timer.

-Regards

[mƎALLEm · Accepted solution]

Hello,

Each core has its own system tick timer. Each core has its own program to run and using systick or not on CM7 doesn't change anything in your scenario.

https://developer.arm.com/Processors/Cortex-M4

https://developer.arm.com/Processors/Cortex-M7

[HDesa.1]

Thank you for the clarification.

This means I can definitely run one core in a loop & other core using FreeRTOS, right?

Also if I need to communicate between the cores then I can still use Openamp middleware.

-Regards

[mƎALLEm]

Yes indeed.OpenAmp or other mechanism you want: 

https://www.st.com/resource/en/application_note/an5617-stm32h745755-and-stm32h747757-lines-interprocessor-communications-stmicroelectronics.pdf