[hpsdr] Angelia_v5.5 download package

[Joe Martin]

Hi Scott, 

In this version of firmware it is not possible to use RX2 with anything but ADC1.  

However, as you bring this issue up and I did not realize how fixed assignments would affect users, I can re-examine the issue of hard-coding the assignments.  As you are aware, some of our earier headaches associated with timing is due to Quartus changing the FPGA floor plan on us (unknownst to us) thereby throwing our original timing solution off and requiring extensive retiming efforts to accommodate even a tiny change in the Verilog code.  This might be made easier to work with if we are able to use a paid subscription to Quarus Prime to gain access to the LogicLock and Incremental Compilation features that we currently cannot access, instead of using our free “Lite” versions.  Phil and I both agree that in principle however, it seems inadvisable to be switching the wide, fast data busses around as we have in previous versions but I’ll take a look to see if I can re-instate that option successfully using our Lite version until we can determine whether a paid subscription will i) work for us suitably and ii) find a reasonable way to obtain funds for a paid Quartus Prime subscription.  

I’ll work on it some more and if I’m successful with reinstating the switching I’ll release a new version of the firmware.  

Thanks for the heads up.  I surely don’t wish to limit our versatility unnecessarily and arbitrarily.  

73, Joe K5SO

> On Jan 29, 2017, at 12:34 PM, Scott Traurig <scott.traurig at gmail.com> wrote:
> 
> Hi Joe,
> 
> Would you please clarify: is there no longer a way to assign RX2 to any but ADC1?
> 
> The reason that I ask is that sometimes I want to use both RX1 and RX2 both on ADC0, for example to receive two different bands on WSJT-X with my main antenna (I believe a lot of folks do this). Is this no longer going to be possible?
> 
> On the other hand, sometimes I want to use RX1 on ADC0 and RX2 on ADC2 so that I can compare which of my two antennas is better for receiving (spatial/polarization diversity with MultiRX, not to be confused with the phase coherent "diversity" function).
> 
> Thanks,
> 
> Scott/w-u-2-o
> 
> 
> On Sun, Jan 29, 2017 at 12:41 PM, Joe Martin <k5so at k5so.com> wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> All,
> 
> I forgot to mention in my announcement (but it is included in the release notes) that in this latest firmware version we have removed the options for selecting which ADC each DDC is using; the assignments are fixed in firmware.  This change was implemented after we realized that switching wide (16-bit), fast data busses in the FPGA is not a great idea because it changes the internal pathlengths for the data into the DDCs depending upon which source is selected.  This results in it being nearly impossible to find a single timing solution that works for all combinations of selections.  Thus, the DDC input sources are now hard coded as follows:
> 
>         DDC0 <= temp_ADC[0]
>         DDC1 <= temp_ADC[1]
>         DDC2 <= temp_ADC[0]
>         DDC3 <= temp_ADC[0]
>         DDC4 <= temp_DACD (on Tx) temp_ADC[1] (on Rx)
>         DDC5 <= temp_ADC[0]
>         DDC6 <= temp_ADC[1]
> 
> This eliminates the previous complex switching as only DDC4 input source is switched.  This change should help with firmware timing issues going forward.
> 
> Thanks to John K5IT for bringing this announcement oversight to my attention.
> 
> 73, Joe K5SO
> 
> > On Jan 29, 2017, at 12:18 AM, Joe Martin <k5so at k5so.com> wrote:
> >
> > ***** High Performance Software Defined Radio Discussion List *****
> >
> > All,
> >
> > An Angelia_v5.5 download package is available for download at:
> >
> > http://k5so.com/HPSDR_downloads.html
> >
> > This version of firmware for Angelia-based radios upgrades the firmware design from Quartus II v13.1 to Quartus Prime Lite v16.0, including upgrades of all megafunctions in the design. The 122.88MHz VCXO lock feature is reworked to operate at 10MHz vs the previous 80KHz which in turn allows removal of one of the previous PLLs, the new PLLs are improved megafunction versions that exhibit lower output noise.  This firmware also removes an unnecessary PTT input in the firmware that had potential for creating audio pops/clicks on Rx-to-Tx transitions.  Details of the changes are listed in the Angelia release notes included in the download package, as is the Quartus source code archive file for the firmware.
> >
> > Thanks, Warren NR0V, for alerting me to the PTT/audio issue!
> >
> > 73, Joe K5SO
> >
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