Re: [Flashforth-devel] Trouble getting serial comms to work

[Richard B. <ric...@gm...>]

Hi Craig,

thanks for your prompt response. I changed the baud to 9600 and can
confirm via Pulseview that the baud rate has indeed changed to 9600.

However, after the initial gibberish I now get a repeating pattern in
hex in the Pulseview UART decoder of D3 BE A0 FD 84 94 00.

After a bit of navel gazing becomes it dawns on me that the TTL logic
of the board is idle low, so I invert the sense in Pulseview and then
try decoding as least significant bit first and viola: the repeating
pattern could be:

 <space>SP?<space>ok

Which looks like a problem unrelated to serial comms now!

Looks like it's time to start another thread.

Thanks again for your help.

Kind regards
Richard


On 9/17/18, craig bair via Flashforth-devel
<fla...@li...> wrote:
> Hi yourself Richard,
>
> Running the calculation Microchip gives us:
>      ((12288000 / 38400) / 64) - 1 = 4
>   looks tight on the SPBRG, but the error is nill so the crystal should get
> it close enough.
>
> I occasionally have to reset my terminal program (TerraTerm) when it gets
> bloody-minded and acts like that.
>
> Old School Debugging would say try turning the starting comm-rate down to
> 9600 baud and see if it talks.
>
> It's been a while since I've had to do massive tweaking with my 18F46K22-s
> because Mikael's done a good job with the sources.
>
> Good Luck!
> craig bair
>
>
>
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