CubeMX bug??? the generated clock frequency of cortex system timer is not what I set in CubeMX

[ausera uirwaij]

As showed in captures, the cloce source of cortex system timer is AHB/8 but not core clock and the frequency of systick is 22.5Mhz. However the generated clock source is Processor clock (AHB) not AHB/8.

Is this CUBEMX BUG ??

 

 

0x07=0111b

Bit 2 CLKSOURCE: Clock source selection

Selects the clock source.

0: AHB/8

1: Processor clock (AHB)

[Pavel A.]

This is a known bug (systick divisor ignored, remains 1).

You can set the systick divisor manually.

@Imen DAHMEN​  Is a fix planned?

[Khouloud OTHMAN]

Hello @ausera uirwaij​,

First let me thank you for having reported.

Could you please precise on which MCU you have observed this misbehavior ?

Also, it will be helpful if you attach you .ioc file for further check from my side.

Thanks in advance.

Khouloud.

[Pavel A.]

@Khouloud OTHMAN​ Same issue with H743/753/750.

RM0433 shows the /8 divisor for systick, but I could not find it in RCC registers.

And no code for the divisor is generated.

 

CubeMX v 6.5.0, library H7 v 10.0

[Piranha]

It's the SysTick_CTRL register bit CLKSOURCE. Look at PM0214 section 4.5.1. ARM's documentation is generic and it seems that PM0253 is less adapted for STM32...

[Pavel A.]

Ah, so this is the "IMPLEMENTATION DEFINED external clock".

Then SysTick_Config() macro needs too much hacking.

Maybe the systick clock parameter should go to stm32...hal_conf.h along with TICK_INT_PRIORITY. Dunno.