[nRF52832] Store python code on chip

[tBStar]

Hi,
I have a barebone custom board based on the nRF52832 SoC which run the latest Micropython REPL successfully. Aside from running simple code using a terminal, it is counterintuitive to keep pasting the same code everytime the module reset. How can I store code in memory for the breakout board I have?

Thanks

[jimmo]

MicroPython provides a filesystem backed by the device flash. You can store your code there (and main.py will be executed at startup).

To access the filesystem remotely (i.e. to transfer files) you can do this over the UART (or USB UART) used by the REPL using http://docs.micropython.org/en/latest/r ... rd.py.html

[tBStar]

Hi,
I am trying to use the pyboard.py tool with the following line:

Code: Select all

pyboard --device COM5 -f cp main.py :main.py

I am getting:
usage: pyboard [-h] [--device DEVICE] [-b BAUDRATE] [-u USER] [-p PASSWORD]
[-c COMMAND] [-w WAIT] [--follow]
[files [files ...]]
pyboard: error: unrecognized arguments: -f

Is this how it supposed to be done?

[Roberthh]

You may have to update pyboard.py, and call pyboard.py instead of pyboard (withouth .py).

[tBStar]

I pulled the latest build of the micropython and calling pyboard.py script, the result is still the same:

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python B:\micropython\tools\pyboard.py --device COM5 -f cp main.py :main.py
usage: pyboard.py [-h] [--device DEVICE] [-b BAUDRATE] [-u USER] [-p PASSWORD]
                  [-c COMMAND] [-w WAIT] [--follow]
                  [files [files ...]]
pyboard.py: error: unrecognized arguments: -f

Forgive my ignorance, what am I missing?

Regards,

[tBStar]

I did ask for forgiveness ahead of time, I had the wrong git repo. I re-cloned it and now I am able to store the file in flash.
The file is very simple, it has this code:

Code: Select all

import os
os.listdir()

When I reset the board, the REPL start without showing me anything as if it didn't execute the main.py. I thought the main.py is automatically read on boot and run, no?

So I checked on the content on the file and I do see my code:

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MicroPython v1.12-614-gc2317a3a8-dirty on 2020-07-05; PCA10040 with NRF52832
Type "help()" for more information.
>>>import os
>>>os.listdir()
['main.py']
>>> f = open('main.py')
>>> f.read()
'import os\r\nos.listdir()'

Thanks

[jimmo]

I think the issue is that you'll need

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import os
print(os.listdir())

The automatic printing of expressions is a REPL-specific feature (in fact, it's the P in REPL).

[tBStar]

Yes, thank you so much.