HSERIN HSEROUT 9BIT & PARITY (Output is Losing a bit!)

[tumbleweed]

If you set both channels of the protocol decoders to 8 data bits, odd parity, 1 stop then the errors go away (8O1), but I don't know about the data.

Are you sure about the format? You don't include the parity bit in the count of data bits. Typical formats would be 8N1, 8E1, or 8O1.
Normally, in 9-bit mode there's no parity used (9N1).

[HenrikOlsson]

Yeah, like tumbleweed says, it does seem to be ODD parity, not EVEN.

[retepsnikrep]

I think you are both right. Thanks a lot.
I had tried lots of combos!!! But missed odd parity...

[retepsnikrep]

Attached is another Saelea logic data file in which I am struggling to work out the baud rate and parity etc.
It's from a similar device to my earlier posts in this thread so logically you would think format etc would be similar.

The shortest pulse/bit is about 19.30us so that equates to about 51813bps

But that doesn't work in the analyser unless I am missing something.

Only 55000 8, E,1 seems to decode without errors??
But I'm not convinced that is correct.

If I then program my PIC with that baud rate etc it returns garbage or misses the data entirely.
I've even tried using osctune to shift the PIC baud rate up and down but no joy yet.

I'm tempted to try autobaud but that looks pretty tricky from the PIC16F886 datasheet.

What do members think the data rate/parity is of the attached file?

[tumbleweed]

48000, 8o1 seems to work

[retepsnikrep]

That gives loads of errors for me..

[retepsnikrep]

This seems to work??