Com Port

Rudy

I try to connect another 9 pin com port, because the location of the 2nd com port doesn't fit in my layout. If I connect through the 2nd com port I can comunicate hooking up pin 2 and 3 for rx and tx only.· However I haven't figured out how·to comunicate without this port. I have pin 2, 3 and 5 for ground. What am I missing?

· Thank you, Rudy

Peter Verkaik

Here you will find the protocol.
http://groups.yahoo.com/group/JavelinCode/files/documents/
regards peter
·

Rudy

I think I have a wiring problem, when I don't use the 2nd com port, it's working fine with the port. However I try to wire it myself, bypassing the com port, but somehow it won't work.

· Thanks, Rudy

Peter Verkaik

First, lets stick to the proper names:

JIDE port (the programming com port)

COM port (the 2nd com port)

MyCOM port (your new DB9 female connector)

I assume you want to use the Sipex level converter

that is connected to the COM port.

Best way is to solder a short male/female DB9 1:1 cable with 3 wires: 2, 3

and 5

then connect this extension cable to the COM port. Your free DB9 female

connector you can then place where you want it.

To do without the male DB9:

Solder 3 wires on your DB9 female connector on pins 2,3 and 5.

Then solder the other ends of these wires to the identical pins

at the COM port on the bottom side of the Javelin board.



You need to have two shortlink wires from pins 2 and 3 on connector X4

to P0 and P1 (or other if you want) on connector X1.

Then you must define Uarts for the two pins you used.



regards peter

Rudy

I think that is clear now. I wasn't aware of that there is a level converter.
· Thanks again, Rudy