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Graduate
July 20, 2025
Solved

What is keeping me from enabling the RTC clock?

  • July 20, 2025
  • 2 replies
  • 411 views

I want to the RTC to my project, but something is preventing the RTC clock from being enabled and I can't figure out what it is. IOC file is attached.

    This topic has been closed for replies.
    Best answer by jlthompson

    I seem to have fixed it myself. I reset the RCC configuration using the Reset Configuration button, enabled the RCC global interrupt, and changed to the Clock Configuration. I now got the pop-up dialog asking whether I wanted to allow clock issues to be resolved, which I did. I used the Resolve Clock Issue button and voila!, the RTC clock was enabled. SYSCLK was reduced to 32 MHz, but I might be able to live with that. After a successful test, I turned off the RCC global interrupt and the build continued to work.

    Seems like a missed opportunity to inform the developer.

    2 replies

    Graduate
    July 21, 2025

    I just created a new project from your .ioc and RTC is enabled !

     

    mbarg1_0-1753083084710.png

    Please mark as solved if you agree problem is solved.

    Graduate
    July 21, 2025

    Then why is it grayed out in the Clock Configuration view?

    jlthompson_0-1753134950866.png

     

    Graduate
    July 23, 2025

    How can I fix my configuration so that the RTC clock is enabled without breaking my project?