about STM32 clock config

[dqsh06]

hello,

I have a very simple question, I have asked a FAE,but not solved.

I am using STM32CubeMX to config a project. I used an external 32.768khz crystal. I want to set the RTC clock to the external crystal. 

below is my setting.

I think i have enabled HSE and LSE. 

the clock to RTC is fixed to LSI RC, but I want to use LSE, not LSI, how can I setting?

Thanks,

dqsh06

[SofLit]

Hello,

Could you please share your ioc file?

[KnarfB]

Did you enable RTC before setting RTC Mux?

hth

KnarfB 

[dqsh06]

hello,

I have solved it. 

thanks a lot.

[Andrew Neil]

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@dqsh06 wrote:

I have solved it. 

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For the benefit of future readers with the same problem who may find this, how did you solve it?

Please mark the solution:

https://community.st.com/t5/community-guidelines/help-others-to-solve-their-issues/ta-p/575256

[dqsh06 · Accepted solution]

I have attached the solve method on the reply.

as below

if you check the activate clock source, then you can choose to LSE. 

Best Regards,

[SofLit]

Hello @dqsh06 ,

The remark pointed out by @Andrew Neil was to tell how you solved your issue not just to put a screenshot because it was not clear for everyone then "Accept as solution" that answer.

[Andrew Neil]

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@dqsh06 wrote:

I have attached the solve method on the reply.

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But you didn't explain how that differed from what you had before, when it wasn't working; ie, what you actually had to change to go from "not working" to "working".

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@dqsh06 wrote:

if you check the activate clock source, then you can choose to LSE. 

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Right - so that was the key to get it working?

Please mark that as the solution:

https://community.st.com/t5/community-guidelines/help-others-to-solve-their-issues/ta-p/575256