[hpsdr] New FPGA code released

[Greg - ZL3IX]

Many thanks, Phil.

An assumption from my side - in the older systems, all the new 
processing is done in Ozy, with Penelope being untouched.  So 
compatibility with Pene and Mercury is unchanged.  Correct?

73, Greg ZL3IX


On 2014-06-10 12:01 a.m., Phil Harman wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
>
>
> All,
> There is new FPGA code available for a number of openHPSDR based 
> boards.  The new releases are:
> Ozy_Janus_v2.7
> Metis_v2.9
> Hermes_v2.8
> Angelia_v3.5
> Orion_v2.4
> The Ozy_Janus code will automatically be included in the next release 
> of PowerSDR which will occur shortly.
> The Metis and Hermes code can be obtained from here:
> http://openhpsdr.org/download.php
> Joe, K5SO, will announce the availability of Angelia and Orion code 
> shortly.
> This new code moves all CW RF, Sidetone and Keyer logic into the FPGA 
> in order to eliminate any delays from a CW key press to Sidetone 
> generation. It also immediately applies the selected level of receiver 
> input attenuation, when transmitting, to eliminate momentary ADC 
> Overload warnings.
> Since CW RF generation is implemented in the FPGA  then, apart for 
> user selectable delays on key closure and release, RF generation is 
> instantaneous.
> In the accompanying new release of PowerSDR there are two user 
> adjustable delays associated with the new CW code. These are located 
> on the Setup Form under  General > Options  CW Delay and are:
> Key-Up -- This setting delays the removal of PTT following the end of 
> a CW character.
> Key-Down -- This setting delays the generation of RF following the 
> closure of the CW key.
> Both these settings are intended to enable the user to prevent 'hot 
> switching' of  PA and Linear Amplifier etc. relays.
> Note that the Key-Down delay is added to the length of a CW character 
> in order to prevent shortening of the the first character sent.  This 
> value will need to be reduced from the default 20mS when very high CW 
> speeds are used i.e. above 50 WPM.
> If you are using subsequent amplifiers etc. that switch very fast e.g. 
> PIN diodes, then you can safely reduce these settings to a  few mS.  
> The default values should be suitable for most systems unless you have 
> a very slow relay in the chain.
> All the features of the Iambic CW Keyer previously included in 
> PowerSDR have been incorporated plus 'Semi Bug' were dashes are sent 
> manually and dots automatically.  All the features of the CWX  
> keyboard-to-CW code in PowerSDR are  still available.
> Removal of all CW generation from PowerSDR has been a very large 
> project involving numerous modifications to PowerSDR and all 
> previously developed FPGA code.  However, not only do these changes 
> remove all latency on transmit they also greatly simplify the 
> inclusion of CW for those writing PC code for openHPSDR based boards.
> My thanks go to Doug, W5WC,  Joe, K5SO and Warren, NR0V, for all the 
> effort they have put in to produce such a high quality result.   I 
> would also like to thank the members of the Beta test team for their 
> assistance and in particular Vasiliy, Norbet and Tom, DF2LF, for the 
> outstanding quality of their feedback whilst chasing some very taxing 
> bugs.
> Please note that you MUST use the new version of PowerSDR, which will 
> be released shortly, with the new FPGA code since the new features are 
> not supported by previous releases.
> 73 Phil...VK6PH
>
>
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