Pure Micro Python without Ui-Flow on my M5Stack core2

favnec5

@dhed
Hi, thank you for your firmware.
I try lot of things. There is a problem to use SDCard with display driver a the same SPI. SDCard is down :-/
Do you know this problem ?

dhed

@favnec5
My workaround for this (known) problem:

during boot mount the sdcard and load files to ram
then unmout the sdcard
initialize the display

something like:

import uos
from machine import Pin, SDCard

sdcard = SDCard(slot=2, sck=Pin(18), miso=Pin(38), mosi=Pin(23),  cs=Pin(4), freq=40000000)
uos.mount(sdcard, '/sd')
...
uos.umount('/sd')
sdcard.deinit()

before initializing the display:

from ili9XXX import ili9341
lcd = ili9341(spihost=1, mosi=23, miso=38, clk=18, dc=15, cs=5, invert=True, rot=0xC0, width=320, height=240, rst=-1, power=-1, backlight=-1)

I'm loading weathericons to use with openweathermap that way.

favnec5

Hi, the problem is, for me, that i need to write files to the sdCard like a datalogger. I think old lobo’s version do the job but not lv_micropython… @m5stack : official pure m5stack needed to use the core 2 functionalities OR hidden start menu version of uiflow.

Josef

@favnec5 Here is another Micropython port for the Core2. Already thried that with my core2: https://github.com/thuehlinger/micropython-core2

Another note: you do not need to use another firmware, you can use Micropython directly by just not using uiflow. See my repo https://github.com/hjgode/m5home within the lv dir: lv_test.py
Be warned, the LV Binding is not very well documented and often only links to the C API.

purpledread

@dhed

I tried to get your compiled firmware, but that ZippyShare site keeps trying to download other things and I can't get it to download your file.

Thanks,
/Chris

dhed

@purpledread That link still works for me, but here it is uploaded to an alternative.

purpledread

Thanks, the new upload link worked.

/Chris

purpledread

@dhed

That's all working now, including using ampy to copy files and run code.

I'm use to using Mu Editor with my other ESP32 boards.

Is there some way to run Python code and get back error messages if there is an issue in the code?

Thanks!
/Chris

dhed

@purpledread
I'm using VSCode with the PyMakr extension (see LeMaRiva's blog for install-instructions).
Nice IDE with integrated serial-console for REPL and up-/downloading of files.

But I guess any serial-console (i.E. PuTTY) should allow you to see error messages.
Also check micropython.org for instructions to get a REPL over the serial port.

purpledread

@dhed

Actually, ampy is working fairly well.

Thanks,
/Chris

purpledread

@dhed

I'm trying to read from the SD card on startup and then use the display.

If I access the sd card, the program runs with no errors, but nothing displays.

I tried initializing the display using the example you gave, but I get an error that there isn't enough DMA-able memory to allocate the display buffer.

/Chris

purpledread

@dhed

Sorry for the newbe questions. You've been a big help.

When you say you load files to ram from the boot.py file, how do you access that ram from the main.py file?

purpledread

@purpledread

Never mind. As simple Python code.

Thanks!

Snufkin1514

Is it possible to use m5stack_ui here?
How do it?