Hi Rainer! > I want to acces a parallel port (in Linux) from FPC 1.0.4 to control a > connected LCD display. I did such things in DOS with TP/BP by accessing the > hardware of the port directly, but this seems to be a little bit too close to > the hardware in linux. Instead, I would like to access the parallel port > through its device (i.e. /dev/lp0) and with some ioctrl() calls to access the > handshake lines, too. > > Should normally be no problem, but I have no idea where to start. > > Does anybody have a sample code for that? Also, a easy to understand > documentation of all parallel-port ioctrl() functions would be helpful.
I'm sorry that I can't help you out with ioctl()s. But: Some time ago I was searching for that (/dev/parport should be the right thing) but didn't find anything. Instead of that I had to directly program the ports. Look up my K7103 Digital Storage Oscilloscope project at http://k7103.sourceforge.net/ and download the sources. In the source there is a file called osziaccess.pas which does parallel port programming. There is an "ioperm()" call too, this is important. Attention: you need root access to use this call. That is the drawback of that method. Bye Hansi -- Johann Glaser <[EMAIL PROTECTED]> Vienna University of Technology Electrical Engineering ____ http://www.johann-glaser.at/ ____ _______________________________________________ fpc-pascal maillist - [EMAIL PROTECTED] http://lists.freepascal.org/mailman/listinfo/fpc-pascal
