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BrainFPV / TauLabs

http://www.brainfpv.com
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1khz MPU rate + BLHeli14 sporadic/failure to arm #27

Closed fujin closed 9 years ago

fujin commented 9 years ago

With the Brain set to 1khz MPU rate, BLHeli14 doesn't want to arm up nicely on my RG20s. If I'm lucky one will idle correctly (low tone). Frankly, it is scary. https://www.youtube.com/watch?v=GleKYCgpkrc

Setting the MPU rate back to 500hz fixes it :( I have a sparky2 here I'm going to test with as well to see if it's isolated to BrainFPV.

Thoughts? Anyone able to reproduce?

tracernz commented 9 years ago

Are the ESCs known to work at this frequency?

fujin commented 9 years ago

@tracernz @borisbstyle is running them at 800usec here https://www.youtube.com/watch?v=y-8dQA8U3HE -- 1.25khz

fujin commented 9 years ago

@tracernz I will dig out some other gear and try to reproduce running them at at least 1000usec ideally.

fujin commented 9 years ago

Also worth mentioning I suppose that the ESCs have "PWM Input" turned to off, which more or less makes them only accept oneshot signals as far as I understand it.

BrainFPV commented 9 years ago

@fujin thanks for reporting it. I would be surprised if this is Brain specific; it seems more likely to be an issue with that particular ESC. Let me know if you can reproduce this on sparky 2.

borisbstyle commented 9 years ago

I tried 1khz and even more on SPRACINGF3 and NAZE and both work fine on RG20 and SN20

fujin commented 9 years ago

@sskaug was kind enough to supply me with a testing firmware for RG20/DYS SN20 which fixes the 1khz issue. closing.