Feather M4 Express: Neopixel blazes after flashing

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hmilz
 
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Feather M4 Express: Neopixel blazes after flashing

Post by hmilz »

Hi all, whenever I flash some .UF2 file to FEATHERBOOT, the device reboots but the Neopixel will blaze white and not turn off. This was before and after I flashed the recent bootloader 3.15.0. And I cannot turn it off using the Neopixel library in my sketch. See photo.

Any idea why?

Thank you!
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mikeysklar
 
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Re: Feather M4 Express: Neopixel blazes after flashing

Post by mikeysklar »

The Feather M4 has a NEOPIXEL pin (pin 8) you can use the name or number to reference it. Is that what your Arduino code is using? Can you post the code you are running?

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hmilz
 
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Re: Feather M4 Express: Neopixel blazes after flashing

Post by hmilz »

Thank you for the reply, but none of my code is involved in the neopixel blazing. This happens immediately after copying _any_ UF2 file to FEATHERBOOT (in this case, with uf2conv.py), apparently before any sketch begins to run.

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mikeysklar
 
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Re: Feather M4 Express: Neopixel blazes after flashing

Post by mikeysklar »

I'll try it on my Feather M4 Express.

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mikeysklar
 
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Re: Feather M4 Express: Neopixel blazes after flashing

Post by mikeysklar »

I'm unable to reproduce the white light with the standard Adafruit bootloader and images.

What is type of image are you building with the custom UF2's?

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