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Solved Problem

When changing BMM350_ODR to a faster rate, self-test would fail on startup.
Turns out you've to wait atleast 6000us before doing self-test

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NXP MR-Tropic board

@niklaut I see that the FMU-V6S also has an BMM350, could you confirm if you've also have this issue? And that this fix solves it?

We've to wait for atleast 6000us before doing self-test
@PetervdPerk-NXP PetervdPerk-NXP requested a review from niklaut May 28, 2025 08:36
@PetervdPerk-NXP PetervdPerk-NXP requested review from dagar and mrpollo June 5, 2025 15:12
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I suppose @niklaut doesn't have an opinion. @dagar could you review?

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@niklaut niklaut left a comment

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I can confirm the broken behavior with these params. Only an issue with 400Hz, ≤200Hz is still fine.

With the fix it works fine.

@niklaut niklaut merged commit 001efc1 into main Jun 17, 2025
69 checks passed
@niklaut niklaut deleted the pr-bmm350-self-test-fix branch June 17, 2025 10:01
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2 participants