Date: Sat, 9 Dec 1995 08:44:03 -0600 From: Rich Murphey <rich@lamprey.utmb.edu> To: gene@starkhome.cs.sunysb.edu Cc: kelly@fsl.noaa.gov, freebsd-questions@freebsd.org, smp@csn.net Subject: Re: tw driver Message-ID: <199512091444.IAA25957@id.slip.bcm.tmc.edu> In-Reply-To: <199512090721.CAA19178@starkhome.cs.sunysb.edu> (message from Gene Stark on Sat, 9 Dec 1995 02:21:11 -0500)
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|Date: Sat, 9 Dec 1995 02:21:11 -0500 |From: Gene Stark <gene@starkhome.cs.sunysb.edu> |Cc: freebsd-questions@freebsd.org, smp@csn.net | |>I'm trying to get the tw driver to work but haven't had any luck. It |>won't detect the TW523 connected to the parallel port. | |>- Rebooted. The probe repeatedly calls wait_for_zero(), which never |> finds the zero crossing signal. Eventually it gives up. | |I assume the TW-523 is plugged in the wall, right? (first things first) This symptom is similar to what I saw: pin 17 on my parallel port was write-only, so when reading it the zero crossing singal was ignored. |>- Built a connector for the parallel port according to the directions |> on http://www.freebsd.org/~faulkner/multimedia/HomeAuto/Tw/tw.html. |> |> With one small modification: RJ-11 pin 1 (black) goes to both |> DB-25's pins 12 and 17. The tw source code says it looks at pin |> 17, but the web document mentioned above talks about 12 being |> preferred, while 17 is backwards compatible. | |The document you cite was written after FreeBSD 2.0.5, and it refers |to a version of the tw driver that Rich Murphey worked on a few months |ago, but which as far as I can see was never committed to FreeBSD-current. |The version that is in FreeBSD-current does not have Rich's modifications, |including the pin 12 stuff. I personally am using the driver that |is in 2.0.5 (and have been for a couple of years). However, Rich was |not able to get stuff working with the sync line on pin 17, and was |forced to switch over to pin 12, with some modifications to the driver. | |Best would be if you can get Rich Murphey or Steve Passe to send |you their copy of the driver. I can probably dig one up out of my |back mail files, but I don't know whether it would be the final version |that they arrived at. If you don't have any luck getting it from them |mail me back direct and I will look for it. I'll send you a copy of what I'm using. It works with 2.1 and FreeBSD-stable. It still needs to be cleaned up, etc., but it's fairly stable in that I haven't touched it in a month and haven't seen any problems in that time.
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