pops13

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hello friends....

I'm writing device driver for dot matrix printer EPSON LP-300
The prob is, m not getting how drivers for printer works
I google for it bt m nt getting any information ...

Can anyone is in a position to let me know the theory abt the functionality of these printer drivers...
{like what happen when we gv print cmd & so on...???)


pls pls help me as early as possible ...

m kindly waiting for u...

John VV

google might not be mush help because RH 9 hit it's END OF LIFE in 2004 and is old and unsupported and VERY insecure .

lutusp

You want to write a kernel driver by asking people how to proceed in an online discussion group? Don't you think it would be more productive to actually study the topic in depth, by for example browsing the Web and reading the many detailed articles on the topic?

There is a name for what you are doing ... it's called "programming by newsgroup." It doesn't work.

Also, you need to pay attention to communication issues, or you will never succeed as a programmer. When you try to abbreviate everything and type as fast as humanly possible, you create a result that cannot be parsed -- by either a compiler or a human being.

This also explains how you managed not to find any of the numerous Web articles about kernel driver design. Chances are they were written in complete, comprehensible sentences, which bored you so much that you fell asleep at the keyboard.

u need 2 lrn hw to typ

pixellany

lutusp has given you most of the advice I was thinking of---but much more eloquently........now I can be the "good cop".

Get yourself a copy of "Linux Device Drivers" from O'Reily. It will be a any large bookstore, Amazon, and maybe even free online at the O'Reilly site.

pixellany

So.....it turns out that you already have the book I recommended. I also note that you did not post any follow-up in your first thread on this topic. I would suggest that you tell us something specific in the LDD book that you do not understand.

When you say something like this, and then don't respond to people's help, you will not have much credibility here.

pops13

Hello pixellany, lutusp, John VV
Please don't miss understood me.
Actually I didn't expected this early replay from u friends.

I am actually new to this online discussion's.
Specially to lutusp, I will take care while asking questions & also towards my communication.

So here I will explain you till the date what I have done.
- I already have the copy of "Linux Device Drivers" from O'Reily.

- I'm using RHL-9.0(kernel 2.4.x)
- I downloaded Kernel source tree (kernel 2.6.17.11) & configured, Build & installed it.

- I registered my driver(/proc/devices & /dev entries are made with major & minor number)
- now I stuck up because I am not getting what to do next(I searched a lot nut I might be firing a wrong query that's why required some help).

As a fresher, I'm going step by step.
According to me before moving ahead, I should know that how these printer driver works exactly(that's why that post).

==> I only gone through some chapters of that book(still reading & it take times to understand each an everything till its implementation)
==> Do I need some more patience?

John VV

But Why RH 9 ???
that is like learning how to wright a driver for " MS Windows 98 " in a vista and Windows 7 world .

pops13

Hello JohnVV,

As I have kernel source tree 2.6.17.11 configured & build, I thing that creates hardly a difference.

==> Do I need to switch over to another version?
==> Please tell me why?

John VV

if you want to learn to build a driver for a printer from 1985 on a DEAD version of Red Hat ( RH9 has been UNSUPPORTED for 5 years )

that is YOUR choice