We have been using COM2 with no problem -- it has the right RS-232
voltage levels.
Things to check:
1. Is the ribbon cable header inserted the right way?
Pin 1 on the cable (red stripe) should go to pin 1 on the header
(white dot). So the cable goes towards the center of the board.
2. Did you set up COM2 with the EXACT same settings?
e.g. kill the getty, set baud rate right.
An easy sanity check is to short DB-9 pins 2 and 3 which will give you
a loopback: any data sent to the port will come back on it.
--- In "BillBergeron" <> wrote:
>
> Since posting this, all of 10 minutes ago, I was able to get it working
> on COM1 but still not on COM2 (where I would prefer it connected). I
> realize it is a 10 pin header but I'm looking at the hardware manual
> and it seems to indicate that pinouts should corrispond to the DB9
> connector. Is there somethign that needs to be done to put this in RS-
> 232 mode or am I wrong about the pinout? Or anything else I am missing?
>
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