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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