Miscellaneous > Programming & Networking

dos.h

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TheQuirk:
i used delay because it usually goes below one second.

and most importantly, thanks!  

[ August 01, 2002: Message edited by: TheQuirk ]

voidmain:
If you need a function like delay() you might then check out the nanosleep() function.

TheQuirk:
thanks, again. I'm just so used to programming in dos/windows... =\

voidmain:
You sparked my interest with your parallel port interests.  I too have always wanted to get into building something that I could control from my computer but I have no electronics background. I decided to go pick up a breadboard, a handfull of LEDs, some wire and a DB25 connector.  I built a cable to plug into my parallel port and wire up all the data pins and a ground to the breadboard.  Stuck in 8 LEDs (Red, Green, and Yellow randomly).

Then I took the lptout.c example and an nsleep.c example (using usleep() to get the millisecond resolution) which gave the the necessary programs to include in a simple shell script to control the LEDs.  I made the shell script so you could input the LED sequences interactively or put all of your LED commands in a file and loop through them to make cool christmas light patterns.  My son made the light sequences.  Here's the three pieces of code:

lptout.c:

--- Code: ---
--- End code ---

nsleep.c

--- Code: ---
--- End code ---

lights:

--- Code: ---
--- End code ---

Then:

# gcc -O -o lptout lptout.c
# chmod u+s lptout
$ gcc -o nsleep nsleep.c
$ chmod +x lights

Then to run the lights program interactively:
$ ./lights

If you want to have the script read the value/delay sequences from a file run it like:

$ ./lights lights.txt

Here is the "lights.txt" file my son came up with:


--- Code: ---
--- End code ---

Makes a good Christmas light sequence.                        

Thanks for sparking my interest.  Now it's on to more interesting things like building a battle bot and writing a program to control it.. I am into R/C airplanes as well so I am trying to think of a way to use radio and computer control together.. Any ideas?

[ August 06, 2002: Message edited by: VoidMain ]

TheQuirk:
great little program  
how much weight can one of the airplanes carry? maybe you could fit a small enough single board computer to automate various tasks? it would be a rather costly project, though...

By the way, the battle bots website has a TON of information on how to build your own robot, program it, etc.

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