M5stack ili9341 driver

Micropython
1

Hi guys!
I am using an M5stack and I am trying to flash it with https://github.com/littlevgl/lv_micropython.
I was able to flash it and use Micropython via REPL but I am not able to use the screen, no image ever… As anyone managed to do this? Being looking for ages and can’t find a solution…
I have changed the ili9341.py driver to use the M5stack pins but I am not sure about the power one, can’t find what I am supposed to use there.
As anyone done this before that can give me a little help?
Thank you in advance!

2

Hi @Tiago_Almeida!

Yes, some people are using it with M5stack. See this issue:

I’m not sure M5Stack has a power switching pin for the lcd. You can set it to -1 if it’s unused.

If you need help with your code, please post your code.
It’s best to provide a link to your git repo (in GitHub or GitLab).

1 Like
3

Thank you so much! @amirgon
Your help was enough for me to not give up and finally managed to make my screen work!
You have made my day ahah.

4

That’s great!

Could you share with us how you configured the driver? This can be useful for others who might want to use M5stack with LittlevGL.

5

Sure! I’ll do that. I might even do a little guide with step by step from scratch (from compiling to first functional test) just need a bit of time.
But for now I’ll leave here what are the settings that one should hardcode in /lv_micropython/lib/lv_bindings/driver/esp32/ili9341.py (or pass when initializing the driver):

def __init__(self,
        miso=19, mosi=23, clk=18, cs=14, dc=27, rst=33, backlight=32,power=-1,power_on=-1, backlight_on=1,
        spihost=esp.HSPI_HOST, mhz=40, factor=4, hybrid=True, width=320, height=240,
        colormode=COLOR_MODE_BGR, rot=MADCTL_ML, invert=True, double_buffer=False
    )

If someone tries this and does not work let me know and i’ll try to help.

PS: Not sure about the double_buffer and the factor settings, first time using this lcd and drivers… if someone have any insight about it let me know.
Also, I have only done small tests yet, image is ok until now, so not sure about more advanced functions, but i’ll report if I find any problem

1 Like