2010/9/25 Bo Berglund <bo.bergl...@gmail.com>: > So then I found FPC and now I am looking for advice concerning if it would be > possible to use FPC/Lazarus to program for an embedded Linux board with a > graphics LCD screen. I want to be able to do the following: > > 1) Communicate via RS232 to the equipment core to control it and retrieve > data. We already have a serial interface protocol for sending and retrieving > data and commands, which would be the gateway into the core. So the first > question is if there exists some class/component in FPC that can be used to > communicate. > > 2) Display control screens in a GUI way with standard controls (buttons, text > boxes, radio buttons etc). This would be the new user interface for the > instrument. > > 3) Display data graphically (curves, pie charts etc). We need to improve on > the on-board datat display a lot.... > > 4) Store data on a file system, either SSD or flash memory. > > Can this be done?
1) I'm not aware of a ready made solution, but it quite probable exists and if not it would be probable pretty easy to write one. It's supposedly mostly a matter of getting access to/opening the right (text) device. 2) Depends. Has the embeded Linux only a frame buffer device or a X server? On X you can choose from more than one widgetset supported by FPC/Lazarus. GTK+ can AFAIK also run on bare fbdev but I don't know if the LCL/GTK does support that. 3) see 2) 4) Linux suports a broader range of filesystems than Windows, no problem expected here. > Is it possible to program on a standard Linux distribution but compile for > the embedded linux? Yes, that's what cross compiling is for. In any case, the embeded Linux CPU has to be a FPC supported one, e.g. x86, AMD64, ARM, ... and many more. > Can I even re-use my Delphi7 classes from the windows environment? Those dependent purely only on RTL/VCL and not on direct WinAPI calls have a good chance to being ported to FPC. Sometimes they will just work w/o modifications in Delphi mode. -- bflm freepascal-bits.blogspot.com _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
