MicroPython Forum (Archive)

When I run the program below the new main.py is created and the old files are removed. A reset is made but the new main.py does not start to execute until after I manually press reset as well. Then the blue LED is turned on. it does not make a difference if I use pyb.reset or pyb.hard_reset.
What am I missing?


#CodeSwap.py
import os

def write_to_file(file_name, text):
with open(file_name, 'w') as source_file:
source_file.write(text)

def remove_old_code():
os.remove("CodeSwap.py")
os.remove("main.py")

class CodeSwapper(object):
def __init__(self):
pass

def write_file(self):
pass

def reset(self):
pass



#main.py
import CodeSwap as CS

green = pyb.LED(2)
green.on()

CS.remove_old_code()
CS.write_to_file("main.py", "blue = pyb.LED(4)\nblue.on()\n")

yellow = pyb.LED(3)
yellow.on()

#pyb.hard_reset()
pyb.reset()

Try adding a call to pyb.sync() before the reset

If you want to see the yellow led turn on, add a delay before the reset. The way it's coded now the yellow led will only be on for about a microsecond before it gets turned off by doing the reset.

You can also try using pyb.main("file.py") in boot.py to set the script to run after boot.py finishes.

I had to change your pyb.reset() to pyb.hard_reset() (in the latest firmware its still called hard_reset). You can determine this from the repl: I also added an import pyb to the top of your CodeSwap.py file and also added an import pyb to your generated main.py file.

To find these "issues", I copied CodeSwap.py and called main.py code_swap.py, and then from the repl I used:

import code_swap

and that showed me various errors with the script. I also tried taking your generated main.py and importing it.

With the changes mentioned above, it seems to be working properly (I also added a delay after turning on the yellow led so I could see it turn on).

Hmm, I don't have pyb.reset or pyb.hard_reset.

pyb.info() or help() do not show the micropython version, how can I see that?

Weren't they included from the start?

If you press Contol-D you should see the python version.

I don't believe that pyb.reset and pyb.hard_reset were included in the Kickstarter boards.

The current (latest) version fo the firmware is:

Micro Python v1.3.3 on 2014-10-02; PYBv1.0 with STM32F405RG
Type "help()" for more information.

Bought it after kickstarter but maybe it was the same batch, will try to update the board.

Works now, had to upgrade the board.