YES!!! - After bashing my head on this problem for the last 2 days, I
finally got the thing working - the peripheral ( a Hitachi CCTV camera )
needs 8 data bits, plus a ninth bit of parity. I set up the comms this
way, and send the camera a ZOOM command, and am most relieved to hear
the zoom motor whirring away now.

Thanks for everyone's input.




-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Bob Ammerman
Sent: 12 January 2004 15:19
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC:] USART - how to generate Even parity?

>The peripheral I'm communicating with is documented as using :
>
>                              "Data length 8 bit
>                                Stop bit         1 bit
>                                Parity   even
>                                Baudrate         4800 bps"

It is a bit unusual to use both parity and 8 data bits, but certainly
not
unheard of. I am guessing that you should try it both ways. Can you do
some
quick testing using HyperTerminal to find out which it is, and eliminate
any
possibility that it is your hardware.

Bob Ammerman
RAm Systems

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