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Strange phenomenon Release 5.3.1 on Feather STM32F405 Expres
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Strange phenomenon Release 5.3.1 on Feather STM32F405 Expres

by water35 on Mon Sep 07, 2020 4:30 pm

I run adafruit_wiznet5k examples (from: https://github.com/adafruit/Adafruit_CircuitPython_Bundle/releases)
and
nRF24L01 examples (from: https://github.com/adafruit/CircuitPython_Community_Bundle/releases)

Using same hardware wiring with Feather STM32F405 Express,
    On CircuitPython Release 5.3.1 , when run examples, arise strange phenomenon, the NeoPixel LED goes off (in REPL it should be steady white), REPL stop respone, but the CIRCUITPY drive work still.

    On CircuitPython 6.0.0 Alpha 3, does not has this issue.

Please verify it or test other SPI relate devices, I guess the SPI bus work incorrect on Feather STM32F405 Express using CircuitPython Release 5.3.1 .
Thanks.

water35
 
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Joined: Sun Mar 17, 2019 7:12 am

Re: Strange phenomenon Release 5.3.1 on Feather STM32F405 Ex

by danhalbert on Tue Sep 08, 2020 11:18 am

6.0.0-alpha.* for STM32 is definitely improved over 5.3.x, so at this point, I would suggest just moving to 6.x. There will be a beta release soon.

danhalbert
 
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Joined: Tue Aug 08, 2017 12:37 pm

Re: Strange phenomenon Release 5.3.1 on Feather STM32F405 Ex

by hierophect on Tue Sep 08, 2020 11:24 am

STM32 chips have some known issues on 5.3.1, and in general you will likely get more stable performance on 6.0.0, since it includes a number of significant reworks and improvements to the port. In particular, a number of changes were made to clock timing and low power code which have impacted modules like the Neopixel. I'd recommend sticking with 6.0.0 if it is working for you.

hierophect
 
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Joined: Fri Jul 13, 2018 10:24 pm

Please be positive and constructive with your questions and comments.