Re: [Bacnet4linux-developer] RE: Stuff I've been working on

[<col...@co...>]

Wow, sounds like great stuff Rod!  Would you mind sending me a tarball of your current snapshot?  

I'd love to see the virtual filesystem stuff.  Unfortunately, it sounds like too much overhead for my embedded application, though.  

I'd like to join in where possible.

Coleman
-------------- Original message -------------- 

> Hi Rod, 
> 
> > Read and respond to this message at: 
> > https://sourceforge.net/forum/message.php?msg_id=3010049 
> > By: thenbomr 
> 
> I'm posting this to the developer list so that other developers may see it. 
> 
> > Okay, I now have functional code that reads and writes XML formated data for 
> > initialization of the BACnet database. This code uses the open source package 
> > 'expat' for parsing the XML data file. 
> 
> Great! 
> 
> > Also, I now have functional code that exports the BACnet database as a virtual 
> > filesystem, so any application that can open and read files on a linux 
> filesystem 
> > can access the data in real-time. This functionality relies upon the open 
> source 
> > package 'fuse', to provide the 'file system in userspace'. While this method 
> > of exporting data is fairly nice in terms of simplicity for the 'client' 
> application, 
> > it is a major CPU hog if you want to use it to continuously poll for new data. 
> 
> Great feature! So it might need to reside on a standalone server... 
> 
> > In response to that shortcoming, I also have developed code that exports the 
> > data using IPC message queues. A message is stuffed into the queue on each COV 
> > monitor received. This allows a client application to block pending receipt 
> > of new data, and turns out to be very efficient. A simple client application 
> > demonstrates all of the code required to hook up to the BACnet stack. This 
> seems 
> > to address the wishes of one post in the 'feature-request' facility of 
> > sourceforge. 
> 
> Great! 
> 
> > All of the code I've written is based on the 0.3.6 release, and I've modified 
> > the Makefile in ways that assume the user has the expat and fuse libraries 
> installed. 
> > I really don't know how this assumption squares with the philosophy of the 
> package, 
> > so I haven't uploaded anything to the CVS repository yet. If I was any good 
> > at writing Makefiles, I'd probably try to put in some kind of conditional 
> building 
> > to either use the external library functionality, or not. I'm thinking maybe 
> > this should be a branch point in the evolution of the package, but I don't 
> really 
> > know how that works, either. 
> 
> Regarding the makefile: since this project is getting more and more 
> dependencies, perhaps now it is time to start using autoconf/automake. 
> It has the features that you are looking for. 
> http://sources.redhat.com/autobook/ 
> 
> Regarding merging: we can try it. 
> 
> Regarding a branch or new project: I guess we need to see after we try 
> to merge. Quite a bit of the BACnet code will be common for most of the 
> projects, but some will be quite different. If you want to create a new 
> project for what you are doing, you can do that too, and we can copy the 
> stuff that we want from that code set into the main project. I have 
> been working on trying to make the code into a library of sorts, and 
> creating many little utilities using the library. 
> 
> Let me know what you want to do and I can guide you through it. 
> 
> Regarding philosophy: don't get me started on philosophy! 
> 
> I am looking forward to seeing this new stuff working! 
> 
> Best Regards, 
> 
> Steve 
> -- 
> http://www.kargs.net/ 
> 
> 
> 
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