Now is the time to connect the digital scope and see what is actually on
the wire.  Is the data bad or is the receiver unable to read good quality
38400b data?

This is differential data, it should be able to go half a kilometer or
something like that.   Is it actuary using a twisted pair of wires and is
there a good logic ground?

It's easy to see if the cable is the cause. look at the bits on the cable
end, then remove the cable and look at them in the output port.

On Thu, Dec 31, 2020 at 3:31 PM Gene Heskett <[email protected]> wrote:

> Greetings all;
>
> I have this driver working, but at the higher 38400 baud rate, its
> reporting a bad crc about every other update loop. Dropping the baud
> rate to 19200 fixes it but the screen update rate is correspondingly
> slower.  The cable is still the amazon full length cable of about 6
> feet. Will shortening it make any diff?
>
> Thanks all.
>
> Cheers, Gene Heskett
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> If we desire respect for the law, we must first make the law respectable.
>  - Louis D. Brandeis
> Genes Web page <http://geneslinuxbox.net:6309/gene>
>
>
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>


-- 

Chris Albertson
Redondo Beach, California

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