On Sun, Dec 28, 2014 at 1:10 PM, Victor Rodriguez <vm.rod25@gmail.com> wrote:

HI

There is a good ( although really old ) explanation about this here:

http://www.tldp.org/LDP/lkmpg/2.6/html/ http://www.tldp.org/LDP/lkmpg/2.6/html/x569.html

Please , just take it as a good ( and really old ) document to read and understand more about the questions you have. Things on the kernel have change a lot ( it was written in 2.6 )

In general you can try to make the experiment of turn on and off a led ( easier than the monitor )

Hope it helps ( at least this web page it was really helpful for me in the beginign )

P.D. do not expect that the source code compile without modifications in the current kernel :)

Regards

Victor Rodriguez

On Sun, Dec 28, 2014 at 12:39 PM, me storage <me.storage126@gmail.com> wrote:

...

Hi All,

I am following LDD3 for Char Drivers. So we writing a kernel module(char driver) after that creating a char file which is representation of Character Device. So my doubt is how we will communicate with real hardware device let suppose how to communicate with our monitor . Can any one please explain how we will communicate with real hardware for read/write calls? And what is mknod is doing internally when we are creating char/block devices?

Thanks in Advance

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Hi Due to the fact that I have found that many people ( including me at the beginning ) is looking for simple and really short example code. I decided (since your last mail, sorry I had free time :) ) to do a compilation of basic modules examples(nothing big and still on progress ). They are on my git hub repository: https://github.com/VictorRodriguez/linux_device_drivers_tutorial You can download them with: https://github.com/VictorRodriguez/linux_device_drivers_tutorial.git There is a short README ( hope it helps ) Inside the repository there is a led.c file that you will find helpful , It was tested on an old ARM platform. However it will work on any other embedded platform . I will test it on a minnow max (http://www.minnowboard.org/meet-minnowboard-max/) The basic idea is the same, the key is to have the GPIO number :) BTW. on the same git hub you will find another Linux projects under construction ( HAL and PnP analysis ) If you have any question or feedback please do not hesitate to tell me Regards Victor Rodriguez

Hi, Please check the below link. https://github.com/duxing2007/ldd3-examples-3.x Regards, Siva Mannem. On Sat, Jan 3, 2015 at 3:20 PM, Anuz Pratap Singh Tomar <chambilkethakur@gmail.com> wrote:

While we are on the topic of ldd, does anyone know where can the latest source for ldd drivers be found? I think Greg said someone is maintaining a repo kernel wise?

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