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At any pointThere are some requisites to follow this guide: *[https://www.isee.biz/support/downloads/item/igep-virtual-machine-sdk IGEP SDK VM]: follow the [http://isee.biz/component/zoo/item/igep-sdk-software-user-manual IGEP SDK SOFTWARE USER MANUAL] (chapter 2.3 "Setting up and running the VM") or install [http://labs.isee.biz/index.php/How_to_setup_a_cross_compiler#Download.2FInstall_IGEP_SDK IGEP SDK] in your host computer<br> *[http://www.isee.biz/products/processor-boards/igepv2-board IGEPv2], if you see a mistake you can contribute to [https://www.isee.biz/products/igep-expansion-boards/igep-berlin IGEP BERLIN] or [https://www.isee.biz/products/igep-expansion-boards/igep-paris IGEP PARIS] (in this Howguide is used I2C located at HDMI connector) *[http://labs.isee.biz/images/8/8c/Parse-edid-Tobeta3.tar.bz2 parse-edid-beta3.tar. bz2]<br>
→Requirements
= Overview =
This How-To is meant to be a starting point for people to learn use I2C for IGEP v2 devices as quickly and easily as possible. In this how-to, we use a program that reads and decodes EDID information from display. This program was tested in : *[http://releases.linaro.org/platform/linaro-m/headless/final/linaro-m-headless-tar-20101108-2.tar.gz Linaro Headless] and [[How to get the Poky Linux distribution|Poky Linux distribution]] with [[Linux Kernel 2.6.35.y|Kernel 2.6.35.y]] and <br> *[[How to get the Poky Linux distributionIGEP firmware Yocto|Poky Linux distributionIGEP firmware Yocto]]with [[Linux_Kernel_2.6.37.<br> y|Kernel 2.6.37.y]]
NOTE: This program is a beta version, it decodes EDID following E-EDID Standard Release A-1 from VESA using i2c-dev driver. There are some functionalities that are not implemented (see code comments) and other new ones that appear in other revisions. Besides, this program only parses the first EDID 128 bytes block. But this code is enough to learn to use I2C.<br>
More information about [http://en.wikipedia.org/wiki/Extended_display_identification_data EDID].<br>
= Feedback and Contributing Requirements =
= Check I2C Devices =
'''NOTE:''' use these steps with [http://releases.linaro.org/platform/linaro-m/headless/final/linaro-m-headless-tar-20101108-2.tar.gz Linaro Headless] .
In this How-to, I used pre-compiled modules, because: it's quick and it works. All versions of Linux are supported, as long as I2C support is included in the kernel. <br>
To make sure that I2C driver works well, follow the next steps (tested in [http://releases.linaro.org/platform/linaro-m/headless/final/linaro-m-headless-tar-20101108-2.tar.gz Linaro Headless]), to install i2c-tools:
<pre>sudo apt-get install i2c-tools
</pre>
i2c-3 i2c OMAP I2C adapter I2C adapter
</pre>
It's important than i2c-3 was enabled, because it connects to DVI-D by default.
= Compile and Run<br> =
Download [http://downloadslabs.igepisee.esbiz/images/8/labs8c/parseParse-edid-beta3.tar.bz2 parse-edid-beta3.tar.bz2] and extract it.
There are some things that is interesting learn, before compiling the program. Open it, and seek next lines:<br>
<pre>//1==enabled 0==disable
#define FORCE 1
More information about [[Peripherals Summary#I2C|I2C]].<br>
Compile program using your Cross Compiler, I used arm-linux-gnueabi-IGEP SDK: <pre>arm-poky-linux-gnueabi-gcc parse-edid-beta3.c -o parse-edid-beta3</pre> Export binary to IGEP using [[Transfer files via SCP|scp]]: <pre>scp parse-edid-beta3 root@<IGEP IP address>:/home/root </pre>
Run program as root. Pass the i2c number that you want to parse:
<pre>./parse-edid-beta3 -d 23</pre>
= Results =
Monitor name: SMB2030HD
</pre> [[Category:SPI]]