I want to write an application which will control stepper motor (for focus) for my XP machine.. Simple slider on a screen and output to ULN2003 on LPT port... but I have a problem accessing the port..
Long time ago I did some applications for serial port (timer for camera) and this worked OK wit TcomPort pack.. but I never actually found LPT port package anywhere on the net.
I've never done any LPT port stuff but a quick google points to inpout32.dll. Have look at this page for delphi examples and this page for the dll with source by the looks. It says it works in WinXp but I doubt it will work in anything newer. Looks like you have to set bits in the register for port.
I use the freeware AsynchPro with D6, http://sourceforge.net/projects/tpapro/
and it does everything you could ever want.
Lots of worked examples too.
I see its valid for D4 but i've never tried it with that.
Otherwise, you can use simple embedded assembler code to read/write as long as you use something like Userport to disable the Windows port security.
Many thank, guys.. Will try :-)
If successful, I will post the app to the forum.. it looks like there is nothing suitable on the web (at least to my knowledge).
LPT port and Delphi 4
