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Express M4 doesn't mount after bootloader update
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Please be positive and constructive with your questions and comments.

Express M4 doesn't mount after bootloader update

by fxsvelo on Tue Jul 07, 2020 7:30 pm

Adafruit Feather M4 Express board

I was having a problem with a project where the GPS was taking longer and longer to get a fix and eventually not getting one.

When I came to the forum for help, I saw the posting about upgrading the bootloader. Mine was quite old so I figured I'd do that first.

Alas, now the FM4 Exp won't mount. Repeated reset double clicks do nothing. I do get a fast yellow LED pulse and a green neopixel.

This is on Linux (Chromebook) and a Mac. The cable is good. I can mount a Feather M0 with no problem.

Suggestions?

thanks

fxsvelo
 
Posts: 30
Joined: Thu Jan 02, 2014 3:13 pm

Re: Express M4 doesn't mount after bootloader update

by tannewt on Wed Jul 08, 2020 2:46 pm

What version did you update to? I believe the yellow LED is the charge LED and it flashes sometimes when no battery is plugged in. The NeoPixel should be indicating bootloader state. Can you try powering it and double clicking? It should be red if usb doesn't work.

tannewt
 
Posts: 1716
Joined: Thu Oct 06, 2016 8:48 pm

Re: Express M4 doesn't mount after bootloader update

by fxsvelo on Wed Jul 08, 2020 5:44 pm

Just now, after sitting unconnected, unpowered for many hours I plugged into USB on a Mac and got:
pulsing red power above USB jack
flickering yellow below USB jack
red NeoPixel

which changes to
solid green Neopixel after a few seconds...

And voila, it mounts as FEATHERBOOT and INFO_UF2.TXT shows:
UF2 Bootloader v3.10.0 SFHWRO

BUT it never mounts as a CP disk.

I reloaded the boot loader and it still never mounts as anything other than FEATHERBOOT with flickering yellow, solid red power, and solid green NeoPixel.

On Linux (Chromebook) it doesn't mount, though it shows up in lsusb as

Bus 001 Device 028: ID 239a:0022


???

fxsvelo
 
Posts: 30
Joined: Thu Jan 02, 2014 3:13 pm

Re: Express M4 doesn't mount after bootloader update

by tannewt on Thu Jul 09, 2020 11:52 am

Did you reload CircuitPython too? The bootloader updater overwrites it.

tannewt
 
Posts: 1716
Joined: Thu Oct 06, 2016 8:48 pm

Re: Express M4 doesn't mount after bootloader update

by fxsvelo on Thu Jul 09, 2020 11:22 pm

Working now. I guess it just needed a nap. But once it would mount, yes, loading CP has it back functioning again.

Thanks.

Now on the real question of why my GPSes aren't working. But that's a different topic so different post.

fxsvelo
 
Posts: 30
Joined: Thu Jan 02, 2014 3:13 pm

Please be positive and constructive with your questions and comments.