rog_ext connector on Asus ROG motherboards

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darkspr1te
Posts: 10
Joined: Fri Apr 26, 2019 9:53 am
Location: africa
OS: Ubuntu-windows
IDE: Geany, Arduino, notepad++
Core: rogers core
Board: Nucleo64, Blackpill, pic16,pic32, arduino avr

rog_ext connector on Asus ROG motherboards

Post by darkspr1te » Tue Jan 07, 2020 4:17 am

Project Discussion on the ROG_EXT connector on asus motherboards, specifically how to use this to replicate functions of the rog device panels and OC panels without the hefty price tag.
I have already done a lot of reverse engineering and can already use the connector to get information,
most documentation is here, my version uses sym32f107 chip, (MKS TFT 3.2" with custom f/w)
https://github.com/darkspr1te/rog_eye

more to follow

darkspr1te

darkspr1te
Posts: 10
Joined: Fri Apr 26, 2019 9:53 am
Location: africa
OS: Ubuntu-windows
IDE: Geany, Arduino, notepad++
Core: rogers core
Board: Nucleo64, Blackpill, pic16,pic32, arduino avr

Re: rog_ext connector on Asus ROG motherboards

Post by darkspr1te » Tue Jan 07, 2020 4:50 am

So the original intention was to work out what the rog_ext was and what it could do, I stumbled across this in my research
https://overlay.live/guide/guide-asus-r ... y-overlay/

And my snake oil senses went off, there just seemed too many hats+devices in this chain to read the rog_ext connector,

After digging in I was right , the rog_ext is a i2c port to the motherboard which is enabled when you ground pin 6 and you accept data on address $4a like a i2c eeprom memory device would, you then read those values for the figures you want, eg cpu speed, temp etc. You can also write data to the rog_ext(smbus really) , A word of warning, dont just send random data out, you can brick your cpu.
now that we know it's smbus what now?
well there are other devices on this bus, eg rgb, winbond controllers for fans/temps/overclocking , bios , plus more,

so if you have any 3.3v arduino loving device laying around and a rog_ext connector come join the fun.
darkspr1te
Last edited by darkspr1te on Tue Jan 07, 2020 9:57 am, edited 1 time in total.

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Vassilis
Posts: 182
Joined: Wed Feb 27, 2019 5:09 pm
Answers: 2
Location: Thessaloniki, Greece
OS: Linux, Win10, MacOS
IDE: Arduino 1.8.9
Core: Roger, STM official
Board: Bluepill, Maple mini, STM32F4xx
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Re: rog_ext connector on Asus ROG motherboards

Post by Vassilis » Tue Jan 07, 2020 7:23 am

Very interesting project ! Thanks for sharing

By the way, the old forum is back again
https://www.stm32duino.com
Maybe you should post your project there too ;)
-Vassilis Serasidis

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