My first LPT port programming test using LED

This is my first test at LPT programming. More info (source code ) can be found at http://eagerfish.eu/lpt-programming-example-in-c-for-ubuntu-linux

Code is simple, it just sends high bit to data pin 1 for 1/2 second or something and after that low bit for same amount of time.

I soldered LED between pin 2 and 20 in series with 550 ohms resistor for this test.

Category:

Science & Technology

Tags:

• LPT
• programming
• LED
• in c
• blinking
• lpt
• linux
• ubuntu
• drive
• port
• electronics
• testing
• printer

[f1ua]

that's cool man. i did everything right up to what you type into the terminal.

i have no idea how to get it started. this may be a stupid question but hay I'm just starting. would love to get this going

[iceincube]

@f1ua did you compile the program? I can't understand where you got stuck with your try, You have to compile that code in my blog into a program and the run it.

[f1ua]

i typed ../lpt and it gives me this

ioperm: Operation not permitted

[iceincube]

@f1ua oh, damn. Maybe you have to run this program as root? Cant rally remember this. And use one dot. It means current directory. ./lpt

[WedgeWWW]

@iceincube indeed you should run this program from root.

[f1ua]

its all good now i have it working thanks. i also have it so that the light stays on.

i am running if from a vnc in another room and next it will be over the internet .how would i go about individual lights. i have 8 lights wired with resisters into the parallel port. they all go on and off together. i had them working on a windows program so i could run individual lights and set the timing.

your program is the only one i have seen on the net that works properly on ubuntu.

[f1ua]

how do you run it? im sorry if this is a stuped question.

i see you type something in to the terminal but what?

[f1ua]

yes i did. and its sitting compiled in my home folder.

[f1ua]

yes i did. and its sitting compiled in my home folder.