8000 Hang when accessing filesystem if using timers/interrupts · Issue #7204 · micropython/micropython · GitHub
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rkarlsba opened this issue May 1, 2021 · 3 comments
Open

Hang when accessing filesystem if using timers/interrupts #7204

rkarlsba opened this issue May 1, 2021 · 3 comments
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bug port-rp2

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@rkarlsba
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rkarlsba commented May 1, 2021

Hi all

I have an rpi pico loaded with micropython and I have this issue detailed on the links below

https://www.raspberrypi.org/forums/viewtopic.php?f=146&t=310648
https://forum.micropython.org/viewtopic.php?f=21&t=10430

It is reproducable on current micropython by others and it seems to be a bug. Please help :)
@robert-hh
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robert-hh commented May 2, 2021 •
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A short script causing that error is below:

from machine import Pin, Timer
import uos, time

led = Pin(25, Pin.OUT)
timer = Timer()

count = 0

f = open("afile", "w")
f.write("This is a file\n")
f.close()
try:
    uos.remove("bfile")
except:
    pass
    
def blink(timer):
  global count; count = count + 1
  led.toggle()

timer.init(freq=4, mode=Timer.PERIODIC, callback=blink)

while True:
    uos.rename("afile", "bfile")
    time.sleep(0.1111)
    uos.rename("bfile", "afile")
    time.sleep(0.1111)
    print("count =", count)

It's not limited to timer callbacks. The same happens when using the sample script from #6957 with soft interrupts.

@murzoh murzoh mentioned this issue Jul 4, 2021
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@peterbeadle
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I can confirm it is reproducible with a differet code base. I'm having issues with both pin interrupts and timers causing random hangs when writing to internal flash or external flash card on spi. Coder works fine (PID controller runs for days) without flash writes.

@iabdalkader
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I think this was fixed with #7683

tannewt pushed a commit to tannewt/circuitpython that referenced this issue Dec 2, 2022
@dhalbert
Merge pull request micropython#7204 from jepler/build-python3x
845b68c 
return to using python 3.x for builds
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@rkarlsba @iabdalkader @dpgeorge @robert-hh @peterbeadle
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