FreeRTOS: no verride generated for systick

[Lukasz Przenioslo]

Hello, I am using CubeMX 4.26.1:

The bug scenario is the following:

• Configure project for FreeRTOS usage,
• Configure SysTick as system clock,
• Everything works, as FreeRTOS in port.c uses the SYstick registers.
• Change the timer to other one than Systick in sys configuration,
• FreeRTOS generated code will not be aware of that and still configure Systick registers at init instead of ie. TIM2.

All port.c file is coded around systick, with hardcoded addressing and no overrides available to change the timer. Can anyone confirm or had a similar problem?

[Barry.Richard]

If you change the clock then you also have to change the code - there is no way FreeRTOS can automatically do that for you.

Here are some links that will help:

https://www.freertos.org/low-power-ARM-cortex-rtos.html

https://www.freertos.org/low-power-tickless-rtos.html

[Lukasz Przenioslo]

Hi @Barry.Richard​ , thanks for answer.

I dont mean for FreeRTOS to do that but CubeMX yes, the same way it changes other FreeRTOS settings.

[Pavel A.]

This is strange. Normally, CubeMX knows that freeRTOS uses systick, and offers to choose one of MCU timers for HAL tick source. Note, the ST HAL will use the TIM as its tick - not freRTOS.

-- pa