Re: [Discuss-gnuradio] bits to frame / mblocks

[George Barrinuevo]

Eric,

In the meantime while I wait for the mblock to be
stable, I plan to use the simplest method to pass say
100 bits of data messages at a time to a GNURadio
block.  This GNURadio block I plan to create will
accept the first 100 bits as a message and each
subsequent 100 bit blocks as messages.  Of course, of
this block is off by even 1 bit, the messages will not
be retrieved correctly.  My question is would this
simple method work and how reliable would it be?

Thanks,

--- Eric Blossom <address@hidden> wrote:

> On Sun, Apr 08, 2007 at 03:01:23AM -0700, George
> Barrinuevo wrote:
> > What is the GNURadio method to convert bits into a
> > frame.  A frame is a set of bits which constitutes
> and
> > complete message.  The data stream usually comes
> in
> > having a dotting, syncword, message-bits format. 
> How
> > can I put all of this in a set/frame and send it
> to
> > the next block as a set/frame.  Also, how does the
> > receiving block accept data on a per set/frame
> method?
> > 
> > Thanks,
> > 
> > George Barrinuevo
> > address@hidden
> 
> Hi George,
> 
> You'll want to use the new mblock features.
> http://gnuradio.org/trac/wiki/MessageBlocks 
> 
> The wiki page and BBN doc are a bit out of date. 
> See the files below
> for the current API.
> 
> This is work-in-progress, and not currently usable. 
> However, I expect
> to have much of it working sometime later this week.
>  To fully utilize
> it with the USRP, we'll also need the
> inband-signaling extensions for
> the USRP.  Those will will take longer to complete. 
> We're currently
> estimating May for those.
> 
> The work is taking place in the svn repository here:
> 
>  
>
http://gnuradio.org/svn/gnuradio/branches/features/inband-usb
> 
> The files below provide the bulk of the API.  It's
> still moving around
> a bit, but the basic flavor is unlikely to change
> much.
> 
> Polymorphic types (similar to Python or LISP data
> types):
> 
>  
>
http://gnuradio.org/trac/browser/gnuradio/branches/features/inband-usb/pmt/src/lib/pmt.h
> 
> 
> The primary interfaces:
> 
>  
>
http://gnuradio.org/trac/browser/gnuradio/branches/features/inband-usb/mblock/src/lib/mb_runtime.h
>  
>
http://gnuradio.org/trac/browser/gnuradio/branches/features/inband-usb/mblock/src/lib/mb_mblock.h
>  
>
http://gnuradio.org/trac/browser/gnuradio/branches/features/inband-usb/mblock/src/lib/mb_message.h
>  
>
http://gnuradio.org/trac/browser/gnuradio/branches/features/inband-usb/mblock/src/lib/mb_port.h
> 
> 
> Eric
> 


George Barrinuevo
address@hidden