How to control LSI in zephyr STM32WB55RG(nucleo board)

[hkim.71]

Hi all

STM32WB55RG nucleo board

zephyr (3.0)

​

When BLE stack is enabled, it becomes halt.

Can't I use LSI clock to make the BLE stack run ?

​

We made a sample board, but We didn't attach an LSE.

So. use LSI clock.

​

If We use LSE in nucleo , it will behave normally, and if We use LSI, it will be halted.

I want to disable stop mode, but I don't know how in zephyr

​Do you have any idea ?

​Thanks

[Jacob WOODRUFF]

Hi All,

This question was flagged for a case creation in our internal support system for support from one of our specialist teams. The support will be provided directly but if anyone else has the same issue, then they can submit a request on the ST.com website.

Regards,

Jake

ST Support

[Remy ISSALYS]

Hello,

On STM32WB55RG, you can only use LSE or HSE/1024 clock for RF system wake up clock. In your case, you should use HSE/1024. Only on STM32WB15, you can use LSI clock for RF system wake up clock.

Best Regards