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Sending data to the parallel port

P: n/a
MNQ
Hi All

I want to use my parallel port of my PC to control some external devices. I
am writing a program in ANSI C using the PacificC compiler. What I need to
know is how to access the parallel port ie to send data and to read the
state of the parallel port including the control lines. Can anyone
help/point me in the correct direction? I have tried the help files and the
internet but am unable to find anything relevant.

Thanks in advance.

Naveed
Nov 14 '05 #1
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P: n/a
MNQ <co****************@yahoo.co.uk> spoke thus:

(Acceptable post title? Sorry I didn't wait the required 2 hours...)
I want to use my parallel port of my PC to control some external devices. I
am writing a program in ANSI C using the PacificC compiler. What I need to
know is how to access the parallel port ie to send data and to read the
state of the parallel port including the control lines. Can anyone
help/point me in the correct direction? I have tried the help files and the
internet but am unable to find anything relevant.


(The below welcome text was originally written by Ben Pfaff)

Your question is outside the domain of comp.lang.c, which discusses
only the standard C programming language, including the standard C
library. This is a remarkably narrow topic compared to what many
people expect.

For your convenience, the list below contains topics that are not
on-topic for comp.lang.c, and suggests newsgroups for you to explore
if you have questions about these topics. Please do observe proper
netiquette before posting to any of these newsgroups. In particular,
you should read the group's charter and FAQ, if any (FAQs are
available from www.faqs.org and other sources). If those fail to
answer your question then you should browse through at least two weeks
of recent articles to make sure that your question has not already
been answered.

* OS-specific questions, such as how to clear the screen,
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comp.lang.asm.x86, embedded system processor questions may
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--
Christopher Benson-Manica | I *should* know what I'm talking about - if I
ataru(at)cyberspace.org | don't, I need to know. Flames welcome.
Nov 14 '05 #2

P: n/a
"MNQ" <co****************@yahoo.co.uk> wrote in
news:bt**********@rdel.co.uk:
I want to use my parallel port of my PC to control some external
devices. I am writing a program in ANSI C using the PacificC compiler.
What I need to know is how to access the parallel port ie to send data
and to read the state of the parallel port including the control lines.
Can anyone help/point me in the correct direction? I have tried the
help files and the internet but am unable to find anything relevant.


You're off-topic and don't give up on the Internet so easily. I found
this:

http://www.doc.ic.ac.uk/~ih/doc/par/doc/data.html

by searching google for" writing to the parallel port in C

--
- Mark ->
--
Nov 14 '05 #3

P: n/a
MNQ
Apologies and thankyou
"MNQ" <co****************@yahoo.co.uk> wrote in message
news:bt**********@rdel.co.uk...
Hi All

I want to use my parallel port of my PC to control some external devices. I am writing a program in ANSI C using the PacificC compiler. What I need to know is how to access the parallel port ie to send data and to read the
state of the parallel port including the control lines. Can anyone
help/point me in the correct direction? I have tried the help files and the internet but am unable to find anything relevant.

Thanks in advance.

Naveed

Nov 14 '05 #4

P: n/a
"MNQ" <co****************@yahoo.co.uk> wrote in message news:<bt**********@rdel.co.uk>...
Apologies and thankyou
"MNQ" <co****************@yahoo.co.uk> wrote in message
news:bt**********@rdel.co.uk...
Hi All

I want to use my parallel port of my PC to control some external devices.

I
am writing a program in ANSI C using the PacificC compiler. What I need

to
know is how to access the parallel port ie to send data and to read the
state of the parallel port including the control lines. Can anyone
help/point me in the correct direction? I have tried the help files and

the
internet but am unable to find anything relevant.

Thanks in advance.

Naveed


there is quite a lot of information out there on the Internet that
explains how to do this. Try www.beyondlogic.org. There is an
example there which explains how to connect an LCD module to the
parallel port and program it in C. If you need further help let me
know.

Regards,

Ben.
Nov 14 '05 #5

P: n/a
Macgyver wrote:

there is quite a lot of information out there on the Internet that
explains how to do this. Try www.beyondlogic.org. There is an
example there which explains how to connect an LCD module to the
parallel port and program it in C.


If so then it's either blatantly wrong or it's not using C as defined by
the C standard. The C language simply does not supply a way to
accomplish this.

If I recall correctly, the Beyond Logic site is full of non-standard
code using DOS extensions.

-Kevin
--
My email address is valid, but changes periodically.
To contact me please use the address from a recent posting.
Nov 14 '05 #6

P: n/a
>Subject: Re: Sending data to the parallel port
From: Kevin Goodsell us*********************@neverbox.com
Date: 1/7/04 3:52 PM US Mountain Standard Time
Message-id: <Y4*******************@newsread1.news.pas.earthlin k.net> If so then it's either blatantly wrong or it's not using C as defined by
the C standard. The C language simply does not supply a way to
accomplish this.

If I recall correctly, the Beyond Logic site is full of non-standard
code using DOS extensions.

-Kevin
--
My email address is valid, but changes periodically.
To contact me please use the address from a recent posting.


You sound like a religious fanatic.
Engineering is, simplified, about finding working solutions to practical
problems.
It is not keeping the purity of the faith,
keeping out the infidels, being rude to
people who make mistakes or don't know
better.
Nov 14 '05 #7

P: n/a
>Subject: Re: Sending data to the parallel port
From: bh******@dodo.com.au (Macgyver)
Date: 1/7/04 3:41 AM US Mountain Standard Time
Message-id: <63**************************@posting.google.com > there is quite a lot of information out there on the Internet that
explains how to do this. Try www.beyondlogic.org. There is an
example there which explains how to connect an LCD module to the
parallel port and program it in C. If you need further help let me
know.

Regards,

Ben.


www.beyondlogic.org send out spy software. Do NOT contact them. Unless
you work for them.........

Nov 14 '05 #8

P: n/a
A123b456c wrote:
If so then it's either blatantly wrong or it's not using C as defined by
the C standard. The C language simply does not supply a way to
accomplish this.

If I recall correctly, the Beyond Logic site is full of non-standard
code using DOS extensions.


You sound like a religious fanatic.
Engineering is, simplified, about finding working solutions to practical
problems.
It is not keeping the purity of the faith,
keeping out the infidels, being rude to
people who make mistakes or don't know
better.


If you don't value correctness and topicality, this group is not for
you. Also, I don't believe my message was rude, I was simply pointing
out what the poster or the OP might not already know - that such things
cannot be done in standard, portable C, and that the site in question
does not use standard C.

And please don't send your replies to my email AND to the group. One or
the other is usually fine.

-Kevin
--
My email address is valid, but changes periodically.
To contact me please use the address from a recent posting.
Nov 14 '05 #9

P: n/a
A123b456c wrote:
www.beyondlogic.org send out spy software. Do NOT contact them. Unless
you work for them.........


I just contacted them, by visiting their Web site. I received no spy
software whatsoever. Perhaps you are confusing "spy software" with "Web
page".

--
Richard Heathfield : bi****@eton.powernet.co.uk
"Usenet is a strange place." - Dennis M Ritchie, 29 July 1999.
C FAQ: http://www.eskimo.com/~scs/C-faq/top.html
K&R answers, C books, etc: http://users.powernet.co.uk/eton
Nov 14 '05 #10

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