Re: [gpsd-dev] Skytraq Venus 6 config, Was: ✘Patch queue is empty?

[Mike]

On 07/20/2016 04:25 PM, Gary E. Miller wrote:
> Yo Mike!
>
> On Wed, 20 Jul 2016 16:17:41 -0400
> Mike <address@hidden> wrote:
>
> > Okay so I haven't totally lost it yet...  Yes, I am on git head,
> > pulled and built last night.
> Good, we are on the same page.
>
> > If there is something I can test let me know.
> I gotta figure out what to code, then do it, first.
>
> > I'm back to trying to
> > figure out exactly what sets the NMEA delivery to top of second.
> Good plan.  And your venus6 looks to be different than my Venus8.  Maybe.
>
> > Trying to reset to factory default doesn't appear to be working as
> > documented in their manual.
> Actually, the factory default is NOT to output at the opt of the
> second.  I know one of the Windows options will do it, just not sure
> which one, at least for my Venus8.
>
> I just bricked one of my Venus8, so I'll hold on that until I hear back
> from tech support.  Yes, I was dumb enough to flash the slave firmware
> on the master port.  Don't do that...
>
> RGDS
> GARY
Okay this is progress...  I believe that I can show multiple ways to 
NMEA delivery.  There probably isn't a need though.  Too many variables 
anyway.

factory reset
send
\xa0\xa1\x00\x02\x04\x01\x05\r\n

recv
\xa0\xa1\x00\x02\x83\x00\x83\r\n
\xa0\xa1\x00\x02\x83\x04\x87\r
\xff\xff$ver,010723,rev,110327\r\n\r\n
$SkyTraq,Venus6\r\n
$Kernel,v1.6.0,00030E1E,16324105,I,16.367667MHz\r\n
$ver,010723,rev,110327\r\n

get pps setting after reset
xa0\xa1\x00\x02\x83\x00\x83\r\n
\xa0\xa1\x00\x02\x83\3f\xbc\r\n
\xa0\xa1\x00\x02\xb6\x00\xb6\r\n

NMEA deliver after reset and getting 3D
$GPGGA,150635.841,4053.2565,N,08231.2121,W,1,04,3.3,34.1,M,-33.9,M,,0000*5F

send
\xa0\xa1\x00\x03\3e\x01\x01>\r\n

recv
\xa0\xa1\x00\x02\x83\x00\x83\r\n
\xa0\xa1\x00\x02\x83\3f\xbc\r\n
\xa0\xa1\x00\x02\xb6\x01\xb7\r\n

NMEA deliver after "enabling" PPS
$GPGGA,151119.000,4053.2081,N,08231.2915,W,1,05,2.2,431.8,M,-33.9,M,,0000*63

I would note that I see 2 ACKS for each command sent.  The first really 
isn't the true ACK though.  Not sure if this is buggy firmware or me not 
reading the docs right.  My understanding is I should only see one ACK 
with the expected payload/checksum, not the rather pseudo one at the 
start of every response.

Anyway as shown sending "3E" enables PPS and the NMEA delivery is now 
right at the top of second.

Mike