On Fri, 2012-02-03 at 19:13 +1100, Frank Tkalcevic wrote: > I've taken the existing gs2_vfd.c from src/hal/user_comps and made an > sj200_vfd.c > > I don't like writing code that isn't modular and reusable, so I started to > write the module so it could be configured by a table of values. I only got > as far as making it work for my use. The plan was to have one "vfd" module, > and just pass in a config file of values, however I don't have more than one > device to test against.
I haven't considered a generic VFD or Modbus device driver, because not only do the device functions vary widely, but so do implementations of the Modbus standard. I'm leaning more towards preferring a wizard that can help create a custom component. Having a custom component for each VFD would be similar to display or other drivers, after a while a library of components will get filled in and normal users will likely be able to just plug in the one that matches their device. Having a utility to aid in making the components could help fill the library more quickly. > I've attached a zip file with the .c file and SubMakefile. I remember at > the time I had a lot of trouble getting the submakefile to work and couldn't > find any info on it. > > I put it in src/hal/user_comps, modify the submakefile and build. From > memory, I don't think I could build from the src/hal/user_comps directory. > I had to build the lot. Early on, I avoided using the GS2 component as a sample because it appeared that it had to be compiled within the LinuxCNC tree. It seemed I would need to compile LinuxCNC every time I made a change, but this is most likely because I don't understand programming very well. > You'll notice in the code, 2 sets of tables. I too, had problems with v1 > and v2 documentation. I am hoping to find the time to gather this VFD and Modbus information and post it to the wiki so others won't need to go through the same problems. >From above "... however I don't have more than one device to test against.", I wonder how hard it would be for someone to access my VFD's with VNC? I am getting my components sorted out, but in general, being able to use remote devices for development (through the wiki?) might be a good thing. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
