[hpsdr] protocol 2 for Hermes

Thu Apr 27 06:07:02 PDT 2017

Phil,

Oh, wow, 80% full should not be a problem...I thought you guys were at 
95% full or something.

I remember working with an 8K micro, doing bit-banged HDLC and orbital 
prediction is assembly language, and worrying about if I could cram in a 
few more lines of code!

73

Glen K4KV

On 4/27/2017 08:08, Phil Harman wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Helmet,
>
> Firstly thanks to Joe, K5SO, for getting this release of Protocol 2 
> for Hermes out.
>
> I find that I can run both Rx0 and Rx1 at 768ksps and my CPU is 
> sitting at 8%.
>
> DUP Rx is fully implemented in this version of the code and works just 
> fine on my TAPR Hermes board.  Although I have replaced the resettable 
> fuse F3 with a wire link so I could use the board when working on the 
> Gigabit code.
>
> The FPGA is currently about 80% full so room for some more features 
> later on perhaps.
>
> 73 Phil...VK6PH
>
> -----Original Message----- From: Helmut
> Sent: Thursday, April 27, 2017 3:29 PM
> To: 'John Marvin' ; hpsdr at lists.openhpsdr.org
> Subject: Re: [hpsdr] protocol 2 for Hermes
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi,
>
> I agree with Marvin that no hardware modification seems necessary. 
> Running here Hermes from a 13.8V DC source, all onboard voltage 
> regulators work fine and sufficiently 'cool'.
> RX and Tx functions seem ok after a quick test, but obviously DUP RX 
> is still cancelled due to the lack of room in the FPGA. In my eyes DUP 
> for real-time monitoring of the TX spectrum is indispensable. I repeat 
> my suggestion to use the feedback RX of Pure Signal for this purpose.
>
> Thanks guys in advance.
>
> 73, Helmut, DC6NY
>
>
> -----Ursprüngliche Nachricht-----
> Von: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von 
> John Marvin
> Gesendet: Donnerstag, 27. April 2017 06:51
> An: hpsdr at lists.openhpsdr.org
> Betreff: Re: [hpsdr] protocol 2 for Hermes
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Note that as far as the power supply issue is concerned regarding the
> original Hermes, I don't think there is any hardware change that needs
> to be made to the board itself. It's a matter of setting the right
> jumpers and providing an external supply capable of delivering both a
> regulated 12V supply and a regulated 5V supply. The details regarding
> this can be found in the Hermes manual.  So no SMD soldering is
> required, but some external hardware changes will need to be made, the
> difficulty of which will depend on your current power supply and the
> case you are currently using.
>
> It does sound like owners of original Hermes boards would need to do
> some soldering to replace the resettable fuses. I'd certainly like more
> details regarding that, since my primary transceiver is based on a TAPR
> produced Hermes board and I would like to be able to run multiple
> receiver slices at maximum sample rates, which would require the use of
> 1Gbit networking.
>
> Regards,
>
> John
> AC0ZG
>
> On 4/26/2017 10:03 PM, Joe Martin wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Hi Glen,
>>
>> I apologize that I do not know definitive answers to your questions.  
>> When I asked Phil this morning if I could assist in getting the 
>> Protocol 2 Hermes code out because of his restricted time available 
>> to work on the Hermes Protocol 2 code due to work and personal 
>> commitments, he passed the information to me and I simply passed it 
>> along without knowing much more about the specific details.
>>
>> Today I added the new features to the Hermes code that now exist in 
>> the code for the Angelia and Orion platforms and checked that the 
>> result runs on my standalone Hermes, which it does.  My hope is that 
>> this initial Protocol 2 firmware will be useful to some.
>>
>> Phil or others familiar with the Hermes issues specifically can 
>> perhaps answer the questions you ask.  Frankly, I don’t have much 
>> experience with the Hermes platform.  For this firmware development I 
>> used my early-version Hermes standalone board and have not made 
>> voltage measurements on my particular board.
>>
>> I was simply trusting that getting this code operational and 
>> available was at least a reasonable start toward getting things 
>> operational for Hermes users.  Actual users of the Hermes platform 
>> can hopefully explore the power issues and educate us more fully than 
>> my limited understanding currently allows.
>>
>> 73, Joe K5SO
>>
>>> On Apr 26, 2017, at 9:37 PM, K4KV <k4kv at k4kv.com> wrote:
>>>
>>> ***** High Performance Software Defined Radio Discussion List *****
>>>
>>> Joe,
>>>
>>> Thanks for the work!
>>>
>>> This begs the question for those of us who hand-built our Hermes:
>>>
>>> 1.  what are good part numbers for the resettable fuses that SHOULD 
>>> be on the boards?
>>>
>>> 2.  How can we know if our on-board power supply is suffering for 
>>> high current draw?
>>>
>>> 3.  What kind of power supply do I need, now, to run gigabit? 
>>> (should I be worried about PS noise?)
>>>
>>>
>>> I, personally, run a small fan over the board because I was not 
>>> happy with the temperature of the FPGA
>>>
>>> and ADC chips.
>>>
>>> 73
>>>
>>> Glen K4KV
>>>
>>>
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