Hi Pavel,

I've implemented a bunch of communications protocols using the MSCOMM
control for my job, and it's relatively easy. I did it with visual C++ so VB
should be easier.

I've had no problems whatsoever with the control. Just remember to set it up
as a binary or ascii transmission.

> -----Original Message-----
> From: =?iso-8859-2?Q?Pavel_Ko=F8ensk=FD?= [SMTP:pavel.korensky@DATOR3.CZ]
> Sent: Tuesday, February 17, 2004 10:42 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      9bit RS-485 network and PC/WinXP ?
>
> Hello,
>
> I need to debug the networking protocol implemented in the PIC16F88.
> Network is based on half-duplex RS-485 and the protocol use 9bit serial
> communication (if the Bit8 is set, byte is address/command). Speed is
> 19.200 Bd.
>
> I would like to use PC with simple Visual Basic 6.0 program for
> debugging purposes (sending commands to network, receiving answers from
> slaves etc.)
>
> I was planning to use standard MSComm object for communication, mode 8
> data bits, 1 parity bit and 1 stop bit. Parity either MARK or SPACE for
> address and data.
> But I found in several discussions, that this method does not work
> correctly.
>
> Anybody tried this ? And, if this approach does not work, what are the
> options ?
>
> It is a hobby project (network in a small robot) and I do not want to
> buy special Windows drivers or fancy adapters. All what I need is to be
> able to talk with several PICs in PWM/PID motor drivers, sensors etc.
> and debug their firmware.
>
>
> Thank you very much for any ideas.
>
>
>
> Best regards
>
> PavelK

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