CoreMP135 Debian image

ajb2k3

The permissions from the original source should be fine, and apt will make sure any further permissions are also correct. Going back to fix already damaged permissions would be difficult and it would be very easy to miss something.

That's why I spent last night going through the source so I could find where these are set. I could not find the config for the directory like /etc.

Ah it's the host system that set the file permissions.

When the image was generated it wasn't compiled under root so directorys weren't set as root but to the permissions of the host.
The image need to be re generated as root.

aradke

@ajb2k3 :-)

When creating Linux container templates the same issue can arise. If you do any part of it as a non-root account the file and directory ownerships will all end up being the same as the UID you are currently working with instead of as root, etc.

Sometimes things will appear to function okay for a while but if a directory is meant to be owned by a non-root account, such as www-data, then anything using it will completely fail.

Is there any chance you'll be able to document the procedure for creating the image? It would be very, very good to be able to create customised ones and to test different kernels.

Thanks

ajb2k3

@aradke that’s what I’m doing at the moment. I am taking to the programmer about how to build the image

prima

I am currently writing an Ansible playbook to automate the customization of my device, and some things like setting the time zone don't work for the reason described above. Hopefully this can get fixed soon.

I am also working on the LCD screen, as I would prefer to use Python rather than the proposed C environment.

ajb2k3

@prima well currently I'm trying to get the code to compile following the online instructions but they dont work

ajb2k3

Ah ha I got it to compile, the instructions are wrong.
You need to run

make BR2_EXTERNAL=../CoreMP135_buildroot-external-st/ m5stack_coremp135_515_defconfig
make -j4

To get it to compile.
I'm Using a CM4Stack so its slow going.
The issue turns out to be a typo in the line. The guide says /Core135_ but the command is actually CoreMP135

prima

On a side note and not sure this is a related issue, but I can't seem to shut down the device cleanly. I have tried: shutdown, poweroff, halt and the device always reboots instead of shutting down.

ajb2k3

@prima yeh I noticed that too after issuing the Shutdown now command.

nnn

A script to build Debian image is now available in the M5Stack repository.

CoreMP135_buildroot-external-st
https://github.com/m5stack/CoreMP135_buildroot-external-st/blob/st/2023.02.10/tools/creat_coremp135_debian12_image.sh
How to implement (Japanese)
https://qiita.com/nnn112358/items/44921e2470353653058e

ajb2k3

@nnn said in CoreMP135 Debian image:

A script to build Debian image is now available in the M5Stack repository.

CoreMP135_buildroot-external-st
https://github.com/m5stack/CoreMP135_buildroot-external-st/blob/st/2023.02.10/tools/creat_coremp135_debian12_image.sh

How to implement (Japanese)
https://qiita.com/nnn112358/items/44921e2470353653058e

Nice

mgrouch

@nnn

Is there Debian image for CoreMP135 which includes kernel built with all drivers for hardware interfaces of CoreMP135.

I’m considering buying that CoreMP135 and
I need to make sure I will be able to use CAN Bus interfaces, i2c, uart, USB, Bluetooth, RS485, Both Ethernets and WiFi, as well as
touchscreen of CoreMP135 with the Debian image provided.

When it boots, does it boot into some kind of framebuffer LVGL GUI on 2” touchscreen?
Is there code example how to do that?

Or CoreMP135 is sold as hardware platform and users are left to build own Linux kernel and Debian images to support hardware CoreMP135?

Or there is a Debian image which fully supports
CoreMP135 Hardware and all interfaces?

Hardware is not much of use for me if there is no software with drivers supporting it.

Thanks!

prima

@mgrouch said in CoreMP135 Debian image:

I’m considering buying that CoreMP135 and
I need to make sure I will be able to use CAN Bus interfaces, i2c, uart, USB, Bluetooth, RS485, Both Ethernets and WiFi, as well as
touchscreen of CoreMP135 with the Debian image provided.

AFAIK there is no wifi/BT on this device. Dual ethernet works using the available Debian image though. That image has some defects but I guess this is being sorted out.
You can now build your own image (see post above) but I haven't tried that yet.

I have not tried the CAN bus and the other interfaces.
USB: seems to work, but I only plugged in a mouse and keyboard
The serial console works over USB-C and I also use the USB-C cable to power the device from my PC.

When it boots, does it boot into some kind of framebuffer LVGL GUI on 2” touchscreen?
Is there code example how to do that?

If that can help: I recently posted on how to develop Python apps in GTK or QT, using the frame buffer with Xorg/Openbox.

This is roughly the approach I have used for developing on Raspberry PI and other SBCs.

The touch screen work without problem for me.

teastain

@mgrouch https://github.com/m5stack/M5Stack_Linux_Libs
The Official M5Stack CoreMP135 library repository.

mgrouch

@prima said in CoreMP135 Debian image:

@mgrouch said in CoreMP135 Debian image:

I’m considering buying that CoreMP135 and
I need to make sure I will be able to use CAN Bus interfaces, i2c, uart, USB, Bluetooth, RS485, Both Ethernets and WiFi, as well as
touchscreen of CoreMP135 with the Debian image provided.

AFAIK there is no wifi/BT on this device. Dual ethernet works using the available Debian image though. That image has some defects but I guess this is being sorted out.
You can now build your own image (see post above) but I haven't tried that yet.

I have not tried the CAN bus and the other interfaces.

USB: seems to work, but I only plugged in a mouse and keyboard

The serial console works over USB-C and I also use the USB-C cable to power the device from my PC.

When it boots, does it boot into some kind of framebuffer LVGL GUI on 2” touchscreen?
Is there code example how to do that?

If that can help: I recently posted on how to develop Python apps in GTK or QT, using the frame buffer with Xorg/Openbox.

This is roughly the approach I have used for developing on Raspberry PI and other SBCs.

The touch screen work without problem for me.

Ok. No wifi or bt is not an issue for me as long as Ethernet works.

Is it working as DHCP client? I mean it’s just plug into router and I could ssh?

I do care about working CAN, i2c, UART, and RS-485 out of the box with provided Debian image.

Does anyone have experiences with those interfaces on CoreMP135 with their provided OS image?

Thanks

ajb2k3

@mgrouch yes but you will need to access the coreMP135 directly to find the initial IP address. I have been working on documentation but been busy since I started work on making the image compilation steps.

mgrouch

@ajb2k3 said in CoreMP135 Debian image:

@mgrouch yes but you will need to access the coreMP135 directly to find the initial IP address. I have been working on documentation but been busy since I started work on making the image compilation steps.

Documentation is definitely lacking steps on
using CAN, i2c, uart, RS-485 on coremp135

What is Linux kernel version on Debian image?

Thanks

ajb2k3

@mgrouch bookworm

prima

The mDNS service aka Zeroconf aka Avahi aka Bonjour is already enabled on the device, so if you have the client tools installed on your PC you can connect in SSH using the .local address like this:

ssh root@M5Core135.local

M5Core135 is the default hostname.

mgrouch

@teastain said in CoreMP135 Debian image:

@mgrouch https://github.com/m5stack/M5Stack_Linux_Libs
The Official M5Stack CoreMP135 library repository.

I’d like to port my esp32 LVGL app to Linux on coremp135.
This app:

https://github.com/bareboat-necessities/bbn-m5stack-tough

Are there any guides on porting?

Thanks

teastain

@mgrouch I am no expert on the CoreMP135, but it looks like it is more of a Raspberry Pi, than an Arduino or ESP32 microcontroller without WiFi or BT.
In the link I sent you there is a LVGL demo to try.
As to porting your cool Boat app over, it would be easy to do to another ESP32 machine like Core Basic, Core2 or CoreS3, but at some point this is not an M5Stack issue, but a LVGL issue, they may have some guidance over at their GitHub repository.
-Terry