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Sylvain Kaempfer · ‎2016-12-16

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Walid FTITI_O · ‎2016-12-16

Posted on December 16, 2016 at 20:12

Hi

sylvain

,

You should checkif the new LSE source (crystal/oscillator) is correct - > check the table.7 of application note

http://www.st.com/content/ccc/resource/technical/document/application_note/c6/eb/5e/11/e3/69/43/eb/CD002216pdf/files/CD002216pdf/jcr:content/translations/en.CD002216pdf

Second, the used project generated from the CubeMx is for the STM32F3-Disco hardware ; the workspace will include many HW dependencies you would check -> I advise you to regenerate another project using the .ioc file with selection you new board or simply the device.

-Walid F-

Sylvain Kaempfer · ‎2016-12-17

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Tesla DeLorean · ‎2016-12-20

Posted on December 20, 2016 at 13:59

The STM32 devices don't function properly with the 9pF and 12pF 32.768 KHz crystals that are quite common. You want one of the 6-7pF variety, and review the performance of the circuit with the components as built. The most common failures are taking a long time to start, or not starting, and frequency being off or unstable.

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