[hpsdr] Pre-Selector alternative for Mercury - How to controll viaHPSDR/PowerSDR

[Bill Tracey]

Alexander,

 From a purely technical point of view,  it should be possible to add 
support for such a preselector to PowersSDR.

However,  it does not appear Heros has documented the USB protocol to 
talk to the device and near as I can tell the software is not open 
source.    If this were to be implemented in PowerSDR it would have 
to be done with code and/or documentation that is compatible with the GPL.

So for me to work on this someone would have to get the USB control 
protocol documented and/or sample code that can be used in a GPL'd 
program.   I'd also need hardware to develop the code with.

An alternative would be to do our own little controller circuit in 
place of the USB board.  From a quick read of the schematic  it looks 
like all one needs to do is select the appropriate relays?  If that's 
the case a simple I2C expander chip or two sitting on the I2C bus on 
Atlas would likely do the job.

Regards,

Bill  (kd5tfd)


At 02:58 PM 3/30/2009, Alexander Geckeler wrote:
>***** High Performance Software Defined Radio Discussion List *****
>
>Thank to all of you for your thoughts regarding the Heros tiny SCR 
>pre-selector.
>
>I decided to order this pre-selector to implement it into my HPSDR setup.
>
>Bill, because I'm not really a programmer, my question is:
>Is there maybe a chance for you to implement a control 
>link/connection for this kind of pre-selector within PowerSDR?
>
>Initially I will run the pre-selector with its own software.
>
>73, Alexander



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