From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <38FF41D9.2BF99B00@chpc.utah.edu> Date: Thu, 20 Apr 2000 11:43:53 -0600 From: Lou Langholtz MIME-Version: 1.0 To: Michael Schmitz Cc: linuxppc-dev@lists.linuxppc.org Subject: Re: MiniDin9 serial pin outs to talk to DB9 UPS? References: Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: Michael Schmitz wrote: > . . . Nope, you need to connect RTS and CTS, and sometimes DTR and DSR and > DCD are also connected together. C onnecting DTR and TxD will only confuse > the > serial driver. > > > Mac MiniDin9 by jumpering MiniDin9 pins 1 and 6 together. This didn't > > work. Nor did jumpering 1 to 8 or 1 to 7. > > Try connecting 1 and 2 ... > > Michael Thanks Michael. I just gave connecting 1 and 2 a try and the results were no better than before. My UPS terminal program doesn't get anything back from the UPS. It just sits there spinning waiting for I/O without blocking apparantly as the user and system loads go up. Of course this UPS terminal program itself may not be comminicating correctly but at least it compiled without any warnings (or errors). If communications works correctly the UPS terminal program says that I should see an output string from the UPS doing something like identifying itself. I don't see a thing though that appears to come from the UPS. Maybe I should jumper one of the other pairs you mention? Maybe I need to change some stty parameters? Are there any other tools you could suggest to try talking with the UPS? I haven't tried just using "cat" or "tip" yet. Any thing obvious that I should avoid? I'll see if I can't drop a serial analyzer box in the middle some how to see what signalling is actually occuring. Thanks again. Any one else have any ideas? --Lou ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/