Doubt In Char Drivers

[me storage]

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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20141229/19c300cb/attachment.html