[time-nuts] WWVB teensy BPSK early experiments

[paul swed]

I kind of wonder if you don't have a flakey display. I did not add the
terminating R and everything has always worked fine on the display. After I
quit using the 3" jumper cables to the audio card and stacked the modules,
the audio worked correctly.
My display is on a set of 6" jumpers and has been stable from day one.
Though currently the display isn't connected since I am experimenting with
various modules in the teensy.
Regards
Paul
WB8TSL

On Wed, Nov 11, 2020 at 10:47 AM Graham / KE9H <ke9h.graham at gmail.com>
wrote:

> John:
> I suggest you try Chris Howard's
> https://github.com/chris-elfpen/Teensy4WWVBsdr
> You might have to adjust the I/O pins for Teensy 4.1 vs 4.0
> I am having no problems with the display once I put in the source
> termination resistor.
> Been running for multiple days, so far.
> --- Graham
>
>
>
> On Tue, Nov 10, 2020 at 9:45 PM John C. Westmoreland, P.E. <
> john at westmorelandengineering.com> wrote:
>
> > Hello Time Nuts,
> >
> > I've been running some tests - I just had the screen 'white-out' problem
> > happen again - I have a termination resistor on the SCK line (pin 13 on
> the
> > Teensy 4.1) -
> > so it appears this is related to the TFT screen updates - maybe a pixel
> > write going out of bounds.  The Teensy is still running - but the screen
> > can't be read.
> >
> > Note the current code I'm testing is here in case anyone is interested -
> > it's from the PJRC forum:
> > https://github.com/jwestmoreland/el_supremoWWVBsdr
> >
> > 73's,
> > John
> > AJ6BC
> >
> >
> >
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