[hpsdr] Thetis VAC problem

[Oleg Skydan]

Hi, List!

I solve the problem with the VAC output :).

I think the following information may be useful if somebody will design own 
hardware. As I said earlier I run modified firmware on my own board (which 
has significant HW differences from the known HPSDR boards/clones). The FPGA 
on board has limited resources and I had no plans to use "local" audio (I 
even do not have audio codec on board). So I removed some firmware parts to 
fit project into the EP4CE22E22 FPGA (I fitted Angelia code into it :)). I 
suspected that packets from microphone are needed to synchronize TX packets 
to the radio, so I leaved that part of the FW to generate dummy packets. But 
it was disabled until I started to port the transmitter code. After enabling 
it the receiver VAC alive :)

So, the microphone packets (from 1029 port at 48kHz rate) are needed for 
Thetis to correctly operate VAC (it was a bit unexpected).

Now I successfully run P2 protocol on my board for rx and tx (I tested it 
with Thetis and SDR Console v3). There is still quite a bit of work with FW 
yet.

Oleg
73 de UR3IQO

--------------------------------------------------
From: "Bryan Rambo" <bryanr at bometals.com>
Sent: Wednesday, April 17, 2019 12:13 PM
To: <hpsdr at openhpsdr.org>
Subject: Re: [hpsdr] Thetis VAC problem

> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Oleg,
>
> To which VAC (VAC1 or VAC2) are you referring?
> From your description, it sounds like you are trying to run VAC2 while RX2
> is off.
> Is that the case?
>
> 73, Bryan W4WMT
>
> -----Original Message-----
> From: Hpsdr [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of Oleg
> Skydan
> Sent: Wednesday, April 17, 2019 12:09 AM
> To: hpsdr at openhpsdr.org
> Subject: [hpsdr] Thetis VAC problem
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi, List!
>
> I have a problem with the VAC on Thetis (v2.6.4, Windows 8 64x). It just
> does not work regardless of the used Driver/Input/Output/Sample Rate and
> other settings on the VAC page. The Underflow counter on the TO VAC and
> Overflow counter on the FROM VAC groups run up quickly. Everything other 
> on
> Thetis seems to work finely.
>
> There is a little chance I mess up something in the board firmware (I use
> modified Angelia firmware on my own board), but it works flawlessly with 
> the
>
> SDR Console v3 and exchange with Thetis in the MMA looks good.
>
> Am I missing something? Any ideas?
>
> Thanks!
> Oleg
> 73 de UR3IQO
>
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