CMSIS version

[Repwoc]

The STM32CubeG4 package comes with CMSIS v5.6 (https://github.com/STMicroelectronics/STM32CubeG4/tree/master/Drivers/CMSIS) which I think was released in July 2019.

Is it necessary to use this version or can I upgrade it to a later release? Currently v6.1 is the latest CMSIS release.

[Pavel A.]

Following the latest CMSIS is not necessary. STM32G4 is a mature Cortex-M4, it does not require the latest developments in ARM Cortex-M. Updating one of components may (and usually does) break the whole package and causes loss of productivity and time.

[Repwoc]

OK thanks.

What about the STM32CubeH7?  Is that also a 'mature' product?  It also has CMSIS v5.6.

[Pavel A.]

Older STM32H7's are mature products. Not sure about new ones (H7R/S).

[Repwoc]

Is it really not possible to upgrade the CMSIS version for STM32G4?  I would really like to use the arm_atan2_xxx() function in my code but it doesn't exist in the CMSIS included in the STM32G4 firmware.

Thanks

paul

[Pavel A.]

Can't you back-port this function to the library included in the STM32G4 firmware?

[Repwoc]

I guess I'll have to attempt to do that.  Although I don't understand why the CMSIS can't be upgraded - there are bound to be other useful features in the new versions.  Do I have to "back-port" all the new stuff that I want to use?  Makes no sense.