About time the ArmmiteH7 got some TLC: V5.07.01 betas

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Joined: 11/12/2012
Location: United Kingdom
Posts: 6129
Posted: 01:39pm 25 Jan 2022      

  Quote  Why would 5.05.11 work fine, including the RTC if one of the oscillators is not working, yet 5.07.0b1 won't run?

Because they have corrected a bug in the RTC handling in the HAL

  Quote  If it is impossible to use a crystal with ArmmiteH7 on the ver V chip,

No: it works fine on the CMM2 Waveshare board however I always recommend a crystal oscillator rather than a crystal, cheap as chips and better in every way

I'm pretty certain your issue is more likely to be the RTC. Your cap values seem very low. Normally they should be twice the crystal capacitance less a little bit for board capacitance (they are effectively is series)
Edited 2022-01-25 23:41 by matherp