[Rupa X88 Pro 13 - RK3528 board with images]

Thank you! Yes I'm still looking for an image.

Tried that one but no luck, multiple error messages at boot

 

 

[Why armbian-install can brick the TV-box?]

19 hours ago, jpegqs said:

You need to rebuild the U-Boot with this patch to disable the read limit.

 

Thank you. Would you please explain me how do I do that? I could dump the uboot partition, I have "uboot.img" file. 
Also I have flashed a working version of Armbian to an SD card. It boots from my device. 

 

 

19 hours ago, jpegqs said:

It's also possible to patch the binary code of the original U-Boot from EMMC, but it's long to explain.

 

If the SD card patch allows to fully dump the entire firmware, then I have no need to touch the EMMC.

[Why armbian-install can brick the TV-box?]

On 1/14/2024 at 5:37 PM, HydraCL said:

Greetings. I have an X88 Mini 13

 

Hello there! I have this "X88 Pro 13". RK3528 chip and Android 13 on it. I'm posting on the thread every thing I'm doing and tryign, consider I'm not expert in linux neither armbian, just an enthusiast with some knowledge about PCs and tech devices :)

 

 

I would love to completly dump the firmware first. I tryed rkdump tool (using Windows 10) but it failed as device has read protection, so I could only dump uboot.img and some other partitions.

I managed to boot Armbian from SD card, so if there is a way to dump all the partitions (completly firmware) from Armbian I would love to have help with doing it first. If it is possible to put the files on the SD card I can then extract them in a PC running Ubuntu 22.04 LTS.

 

Board has UART pins (needs soldering but that's not problem) and I have an UART USB dongle (CP2102 chip) that I believe I can use  with it. But I don't know which software to use and how to use it. Any information would be helpful to me and to learn few things about it. I'm really interested on how this RK chips is "unbricable" ;)

 

Also I have been reading about "MaskROM mode" and I'm a little confused about those modes. I can put device in "loader" with the hidden button, but I don't get what mask mode is for.

 

 

[LEMFO RBOX HK1RBOX with rk3528]

On 5/5/2024 at 6:38 AM, giga said:

Later on I tried I tried  Armbian_24.5.0_rockchip_h28k_jammy_5.10.160_server_2024.04.25.img.gz from ophub with rk3528-hlink-ht2.dtb,

Did you try to play a video through HDMI? was sound present? You can use a USB flash (pendrive) to try it. As, I understand, the RK3528 is not working with HDMI audio (in my case neither GPU acceleration for videoplayback, it plays but it's choppy).

[Rupa X88 Pro 13 - RK3528 board with images]

So I managed to extract .dtb files from uboot.img using  this extract-dtb tool. 

 

Later on, on a  PC running Ubuntu 22.04 LTS I used "device tree compile" to decompile thos dtb files into dts files. 

 

I followed this article trying to use those DTS files to get the correct hardware informatin and/or drivers, but the /boot folder in the flashed SD card is empty. Probably, as the article says, dtb overlay is not activated in this image.

[LEMFO RBOX HK1RBOX with rk3528]

I have this Rupa X88 13 TV BOX with also uses RK3528, I dumped many parts of firmware using a tool called rkdumper and managed to extract .dtb files using a tool called dtb-extract

Maybe this can help you.
I don't know how to use those files yet, but reading your post I think I have a hint now

[Rupa X88 Pro 13 - RK3528 board with images]

4 hours ago, Hqnicolas said:

1080p on linux?
the gpu was working?

Sorry for the confusion. For the moment I'm using it with original android firmware. 

 

I tried the build suggested by user blustOne (above in this thread), booting from SD card, GPU has signal output but seems not to have HW acceleration for playback (it loads the file, but stutter/choppy playback). Also no sound through HDMI port. 

 

I'm tring to first dump the entire firmware of the device. I don't want to get it bricked because of playing with it. Once I can dump it, I will try to play with the armbian variants, try to build my own, etc. I have never done this and I know I have a long way ahead reading and learning (and no much time), just I want to start with the backup. I will also try to debloat the android version.

I'm using it connecting a flash drive with videos, I connect it to internet as little as possible, it has many bloatware that I'm not sure of what thing it can cause in my private network. Probbaly i'm worring too much about it? ..

[Rupa X88 Pro 13 - RK3528 board with images]

On 4/14/2024 at 11:28 AM, Hqnicolas said:

I'm thinking about buyng an RK3528 Shit box,
but X88 pro 13 just have 10/100M Ethernet RJ45 port

Yes, mine is 10/100M. I'm using it to watch content on a 1080p TV and works pretty fine. If useful to you, it has an USB 3.0 port, to use an external HDD or probabbly a gygabit LAN to USB dongle...

[Rupa X88 Pro 13 - RK3528 board with images]

I tried to dump the full firmware to have a backup but I couldn't do this because its read protection. Apparently I could only extract uboot.img and many other files. There is  a workoround by unpacking that file, editing 4 bytes with any HEX editor, repacking and flashing, that allows to fully dump the firmware after tweaking it. 

I'm not sure of any risk of bricking the device If anything goes wrong. 

By the momment I cannot unppack the uboot.img file to do the trick.

 

Also I'm looking for some more information about how to use the UART interface with it. I have a UART USB dongle (CP2102 chip) that I believe I can use to connect it. Any information would be appreciated.

[Rupa X88 Pro 13 - RK3528 board with images]

12 hours ago, blust0ne said:

try to this image,  it may work for you.

Thank you. Before doing so, I would like to backup the firmware, which I'm a little troubled. I'm trying with a tool called rkdumper from xda forum, but it seems to fail with the RK3528. Seems it is read protected.

 

However, I suppose I can boot and use armbian from SD with touching the eMMC, right?

[Ambian TV box rk3528]

Any advance with RK3528 chip? I shared my board on this thread, and would love to put armbian on it.

[Rupa X88 Pro 13 - RK3528 board with images]

So I bought this chinise Android TV Box and would love to install armbian on it. I am new on this and discovered armbian just after buying it. I didn't know there was no support and not official open source for the Rockchip RK3528, otherwise I would have chosen any other. The box works fine but it has that known malware that send packets to suspicious links (I scanned activity with pi-hole).

 

Description says it has 2GB RAM and 16GB storage (Hynix H26M51002KPR)

WiFi chip is LGX8800D

 

I attach images of the board and all of it's componentes, including IR sensor and display. It also has a red LED that turns on when in stand-by mode.

I hope this help to develop or patch a working version of armbian for it. I have already read about some patches around that would probably work, but I' new to this and I'm not sure how to start.

What I would like to do first is a completly ROM backup, and start doing test with a pendrive or SD card, not writting directly to the eMMC (if possible) until the important things get working. And any help would be appreciated.

 

Edit: I will keep posting in this thread with my progress (or attemps!)