RaZberry HAT & Bullseye

ROCK 4 Series
1

Hi Everyone,

I just got my RockPi4. It works fine so far and I use it as a server for my smarthome.
It has Dietpi installed, which is based on Debian Bullseye.

Now the problem:
I’d like to use a RaZberry-HAT, which is for Z-Wave.
But when I attach the hat, the RockPi will not boot-up. I found this to be a well-known problem.
(See here: https://wiki.radxa.com/Rockpi4/hardware/HATs)

Obviously I need to tweak my config, but here is the problem:

There is no suitable repository for Bullseye :frowning:

Do you guys have any idea how I could make this work with any other steps or what else I could do? This is a discussion that the a.m. link refers to: Configuring kernel before building - #22 by Stephen)

Any help would be much appreciated!

Regards,
Maeffjus

2

First, without any software modification, attach the HAT and power on the board, can it boot?

3

No, just the Network will blink like crazy…
That is the reason I asked here - I had tried it before :slight_smile:

4

Hello? Any update on this?

5

Hello? You are from Raxda, please take care of this problem!

6

REMINDER.
Please check about my question / problem. @jack

7

Okay - is the service this bad? Or @jack, what is the reason you ask once and don’t care any further?

8

Hi, @maeffjus

Somehow I missed this post.

First, check your power supply, does it support 9V or more? Which RaZberry-HAT model are you using?

9

Hi Jack,
yes - power is sufficient! It does 5,9 & 12V.
I think the problem is, that there is something I need to disable in the kernel. There are drivers and modules (see the second link in my first post), but these are not available & not for bullseye (like the hardware-overlays).
So I can not use them at all. :frowning:
As far as I understood, the HAT is using pins that relate to a serial console of the RockPi. But I can not disable the console, so it will not boot with the hat attached.

Regards

10

I believe Dietpi runs mainline kernel, do you know if it supports device tree overlay? If not, you will have to edit the dts to disable the default serial console(uart2). I think two lines should be edited:

  1. remove this: https://github.com/torvalds/linux/blob/master/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi#L20 
	chosen {
		stdout-path = "serial2:1500000n8";
	};
  1. disable this: https://github.com/torvalds/linux/blob/master/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi#L718 
&uart2 {
	status = "disabled";
};
1 Like
11

The DietPi Bullseye uses the Armbian kernel (mainline) and loads device tree overlay in the same way as Armbian.

Please refer to https://docs.armbian.com/User-Guide_Allwinner_overlays/ , but edit the /boot/dietpiEnv.txt file.

1 Like
12

Hey Setq,
I only have the armbianEnv.txt, is that the same file?
How can I easily switch-off from there?
Is there any way at all?
This is the content of the file:

verbosity=4
bootlogo=false
overlay_prefix=rockchip
fdtfile=rockchip/rk3399-rock-pi-4b.dtb
rootdev=UUID=07e32b84-80f4-48a9-a7a0-ad09da30111c
rootfstype=ext4
usbstoragequirks=0x2537:0x1066:u,0x2537:0x1068:u
extraargs=net.ifnames=0
docker_optimizations=off
console=none

And if the a.m. is not an option @jack: Maybe it looks like I’m an idiot, but the lines you mentioned are on Github, where are these on my Rockpi4?
Regards,
Maeffjus

13

I only have the armbianEnv.txt, is that the same file?

Yes, it’s the same file.

How can I easily switch-off from there?

Please refer to https://docs.armbian.com/User-Guide_Allwinner_overlays

14

Thanks so much - but probably I’m an complete idiot, but I can not find how to enable UART2 on this board.
In all specs and files, they only mention UART4.
I have searche on Google, but I have not found ANY useful stuff…

overlays=w1-gpio uart1 i2c0 spi-spidev

Do I just have to write uart2 instead of uart1 in the line above?
I don’t want to mess with the board, since I’m running some productive system on it.