i2c_over_vga [dernulleffekt]

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.

===== I2C over VGA =====
One can use the I2C bus from the VGA connector.\\

----
==== I2C on the VGA Connector ====
How to acces the I2C Bus:\\
{{:vga_to_i2c.jpg?400|}}\\
or use the
[[http://paperpcb.dernulleffekt.de/doku.php?id=vga_synthesizer:vga_breakout_board|VGA Breakout Board]].\\

---- 
==== Workaround ====
A workaround for Arch Linux:\\


Add the I2C kernel module:\\
   $ sudo modprobe i2c-dev
Check your I2C devices:\\
   $ ls /dev/
You should find somthing like:  **i2c-0  i2c-1  i2c-2 ...**\\ 
Install the I2C tools:\\
   $ sudo pacman -S i2c-tools
or on Debian:\\
   $ sudo apt-get install -y i2c-tools
Find your device:\\
   $ i2cdetect -l
The result could look like:\\
    i2c-1	unknown   	i915 gmbus vga                  	N/A
Looking for an I2C device
   $ sudo i2cdetect -y 1
It should tell you the address of your I2C device.\\
Now you can comunicate to your devices with these commands:\\
   $ i2cget
   $ i2cset
   $ i2cdump



==== Links ====
  * [[http://flipthatbit.net/2011/04/interfacing-i2c-the-easy-way/]]
  * [[http://flipthatbit.net/2011/03/building-a-vga-monitor-ddc2-interface-tests/]]
  * [[https://blog.atx.name/twilight-vga-i2c-breakout-board/]]
  * [[http://www.righto.com/2018/03/reading-vga-monitors-configuration-data.html]]
  * [[http://www.boichat.ch/nicolas/ddcci/method.html]]
  * [[http://ddccontrol.sourceforge.net/index.html]]

----
==== License ====

This manuals is made by **Wolfgang Spahn** 2018-20.\\
It is licensed under a [[http://creativecommons.org/licenses/by-nc-sa/4.0/"|Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License]].

<html>
<a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-nc-sa/4.0/88x31.png" /></a> 
</html>

----

dernulleffekt

beyond the art
by
Wolfgang Spahn

Site Tools

User Tools

Site Tools

Page Tools

User Tools