Re: [Discuss-gnuradio] Re: [Commit-gnuradio] r4735 - gnuradio/trunk/usrp/doc

[Eric Blossom]

On Fri, Mar 09, 2007 at 09:04:33AM -0500, Greg Troxel wrote:
>   +This is preliminary design document on the organization of the host
>   +component of the USRP inband signaling implementation over USB.
>   +
>   +Assumptions: we'll have a single usrp_usb_daemon, implemented as an
>   +mblock, that will provide the high-level message based interface to
>   +the USRP.  The daemon will handle all resource allocation, muxing and
>   +demuxing for the control and status messages from multiple clients.
> 
> It would be nice if the design for in-band signaling treated USB as
> the (current) special case, and was done with GigE etc. in mind.  I
> didn't see anything that jumped out from this viewpoint, but earlier
> is better to avoid trouble.

Yes, that's what's being done.  I don't think that it's written down
anywhere, but that's the goal.

> Do you expect that allocation of capacity is anything more than
> internal control within the usrp daemon?  That conjures up isochronous
> bus transactions and OS-level reservations, but I don't think you mean
> that.

Just an internal control, checking that the total allocation is <= 32MB/s.

Eric