[hpsdr] Angelia_v3.0 (FULLY CONSTRAINED)

[Les Keppie]

Hi Joe
I previously had high rx noise with ver2.9 and I can confirm that this  
v3.0 works
correctly as far as the rx noise level is concerned - I see no change in  
level from v2.8
 from which I upgraded

Also confirm that v3.0 loaded correctly using the Programmer

Les VK2DSG


On Fri, 07 Mar 2014 12:34:19 +1100, Joe Martin K5SO <k5so at valornet.com>  
wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
> All,
>
> Angelia_v3.0 is available for download from:
>
> http://k5so.com/Angelia_v3.0.zip
>
> and soon it will also be available from the Apache Labs download page I  
> think.
>
> This version is a substantial (even critical!) improvement over previous  
> versions of firmware in that, for the first time in fact, the Angelia  
> firmware design is now FULLY constrained.  All previous versions of  
> Angelia firmware were only partially constrained, as is the case for all  
> firmware for the HPSDR boards (to my knowledge), in fact.  A recent  
> advancement in my understanding of the TimeQuest timing program and how  
> to effectively use it has enabled me to be able to successfully  
> constrain all paths in this firmware design, analyze them, detect any  
> paths that fail to meet timing requirements, and to manually apply  
> appropriate time delays to each of them so that the design as a whole  
> can fully meet the timing required; for ALL paths.  This advancement  
> will undoubtedly result in more robust firmware designs and, hopefully,  
> substantially reduce the instances of firmware working for some users  
> but not working for others with seemingly the same hardware setups.
>
> In particular, it is my expectation that this firmware version, while it  
> is identical in the Verilog code to that of Angelia_v2.9, will remove  
> the problems experienced previous by some users of Angelia_v2.9 wherein  
> some users observed a high baseline noise problem while others using  
> v2.9 did not.  The big difference is in the timing constraint file for  
> the design, not in the Verilog code itself.  If you were among the users  
> who previously experienced high baseline noise with v2.9 I believe that  
> this new firmware will cure that issue for you.
>
> Thanks Bill KC9XG for verifying for me that the baseline noise issue you  
> observed previously with v2.9 is now gone on your system when using this  
> Angelia_v3.0 firmware.
>
> 73,  Joe K5SO

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