[hpsdr] "FPGA Floor Planning"

[Bryan Rambo]

Hi Joe (and Phil perhaps?),

Would crowdfunding a paid Quartus subscription for our developers to use be
inconsistent with the "open" in OpenHPSDR?  If not, you can count on me for
a generous contribution.

I pose this as a question, rather than as an assertion, because I truly
don't understand the ramifications of these GNU style open-source licensing
arrangements.

73, Bryan W4WMT

-----Original Message-----
From: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of Joe
Martin
Sent: Friday, February 10, 2017 9:43 AM
To: Ken N9VV
Cc: OpenHPSDR
Subject: Re: [hpsdr] "FPGA Floor Planning"

***** High Performance Software Defined Radio Discussion List *****

Hi Ken, 

Yes, thanks!  Phil and I have learned by experience with our timing efforts
how tricky it is to handle fast, wide data buses in the FPGA with regard to
achieving suitable timing constraints.  Unfortunately, the floor planning
option is not a feature that is available in the free versions of Quartus
and we are reluctant to move toward a paid subscription of Quartus as that
would be inconsistent with the "open" nature of the HPSDR projects.  So,
even though it is harder to work with the free versions that don't have the
nice features available in paid subscription versions we've decided to keep
to the free versions so anyone in the community can work with the firmware
if they desire to do so. 

73, Joe K5SO

> On Feb 10, 2017, at 7:12 AM, Ken N9VV <n9vv at wowway.com> wrote:
> 
> ***** High Performance Software Defined Radio Discussion List *****
> 
> F.Y.I.
> 
> "As FPGA designs employ very fast I/Os and bidirectional data buses, it
becomes a challenge to verify correct timing of valid data within setup time
and hold time. Floor planning enables resources allocation within FPGAs to
meet these time constraints."
> 
> <URL: https://en.wikipedia.org/wiki/Field-programmable_gate_array
> >
> 
> 72/73 Ken

_______________________________________________
HPSDR Discussion List
To post msg: hpsdr at openhpsdr.org
Subscription help:
http://lists.openhpsdr.org/listinfo.cgi/hpsdr-openhpsdr.org
HPSDR web page: http://openhpsdr.org
Archives: http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/