I'm trying to push RS232 at 115200 baud over 100 ft cables... I realize now, this baud is way to high for 100 ft...
But, the strange thing is that it works when I increase the fullduplexserial baud setting to 115300.
Why on earth should that make it work? Actually, I've tested from 115300 to 116000 and they all work.
I'm using a Maxim MAX3233E line driver.
Talking to a Spellman power supply.
I'm getting packets of data that are up to ~15 or so bytes long.
At 115200, the first 4 or 5 bytes are correct, but the rest are wrong.
At 115300, all better.
Transmit side seems to work at any baud, it's just receiving back into Prop that needs higher baud.
Whatever transmit chip they have must not be as powerful as MAX3233E...
Anyway, this is puzzle with a solution that doesn't seem to make sense...