MicroPython Forum (Archive)

Posted: **Fri Aug 09, 2019 2:41 am**

I have a bunch of null directories on my thingy (don't ask). ....ok, I've been resetting a deadlocked interpreter using this abomination, while pressing reset...

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while :
do
        expect -c 'send \003\003\003\003\003\003\003\003\003\003\003\003\003\003\003' > /dev/ttyS4
        expect -c 'send "\rimport uos\r";' > /dev/ttyS4
        s="\ruos.remove('main.py')\r"
        expect -c "send ${s};" > /dev/ttyS4
        expect -c 'send \004\004\004' > /dev/ttyS4
done

I'm sure there's a better way (what is it please!

ampy doesn't work while the interpreter is deadlocked...)
Manually calling main() from prompt is the obvious answer to that.

Anyway, all 129 directories have the same name and inode:

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('\x00\x00\x00\x00\x00\x00\x00\x00.\x00\x00\x00', 16384, 0, 4294967295)

...where 'inode' is a sfw alias for FFFFFFFF‬'d. ...actually not an inode as I see the filesystem is FAT

I may seek an alternative...

anyway,

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uos.rmdir('\x00\x00\x00\x00\x00\x00\x00\x00.\x00\x00\x00')

returns ENOENT.

I can flash the thingy, but my MP build is currently broken and, well, I'm lazy (obviously). Anyway, this is all what I call exploratory testing.. I'm learning a lot just by writing this topic.

So, my question is: can I reset/format the filesystem without flashing the device?

Sorry about the rambling explanation..

Cheers,
Bitrat

Posted: **Fri Aug 09, 2019 4:22 am**

Hi,

If you can get to the REPL, you can unmount the filesystem, recreate it, then re-mount it (or soft reset).

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>>> import os
>>> os.umount('/')
>>> from flashbdev import bdev
>>> os.VfsFat.mkfs(bdev)
>>> Ctrl-D to soft-reset

(This is specific to ESP32 and ESP8266, other boards have equivalent methods, and the STM32 port has a way to do a filesystem reset by holding down the USR button at boot).

Posted: **Fri Aug 09, 2019 5:15 am**

Awesome thanks! Just what I was looking for.

Works too

MicroPython Forum (Archive)

can I reset a thingy filesystem without flashing

can I reset a thingy filesystem without flashing

Re: can I reset a thingy filesystem without flashing

Re: can I reset a thingy filesystem without flashing