SAI1 extern clock option, "EXTERNAL_CLOCK_VALUE" not generated from CubeMX, stm32h5xx

[elia_chiarucci]

Hello, I'm using CubeMX version 6.17.0 on MacOS, with an STM32H503CBT6 mcu.

I'm trying to use an external audio crystal with a frequency of 24.576mhz, after setting the new frequency in the clock configuration tab, I get the right value in the .ioc file.

However, "EXTERNAL_CLOCK_VALUE" doesn't seem to be defined in the stm32h5xx_hal_conf.h file, and the default 12288000UL value will be used instead.

This makes audio all choppy and distorted, unless I manually define "EXTERNAL_CLOCK_VALUE" in this file to 24576000UL.

I tried with other MCU families like the G0B1 and it will correctly generate the clock in the hal files.

Is this a bug for the h5 series?

 

 

[Ghofrane GSOURI · Accepted solution]

Hello @elia_chiarucci 

Your contribution is much appreciated.

The issue has been escalated to the development team under internal ticket ID 228076 for further analysis and resolution.

I will keep you informed as soon as updates are available.

THX

Ghofrane