Messages in this thread |  | | | From | "H. Peter Anvin" <> | | Subject | Re: [patch] DTR/DSR hardware handshake support for 2.0/2.2/2.4 | | Date | 2 Aug 2000 12:58:53 -0700 |
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Followup to: <200008021351.JAA05979@trampoline.thunk.org> By author: "Theodore Ts'o" <tytso@mit.edu> In newsgroup: linux.dev.kernel > Date: Tue, 01 Aug 2000 18:35:22 +0200 > From: Martin Schenk <schenkm@ping.at> > > As I needed support for DTR/DSR hardware handshake to communicate with > a serial printer (and the "wire RTS/CTS to DTR/DSR" tip from the > serial-HOWTO works fine for a demo, but is not applicable for a few > thousand POS terminals *gg*), I implemented this functionality. > > Yilch. This is specialized enough that I'd much rather this *not* go > into the kernel. Next thing we know, someone will want a DTR/CD > handshaking mechanism, etc.,etc. > > This should probably be a private kernel patch, or (much more strongly > suggested) that you just get specially wired RS-232 cables. This is in > fact a very standard thing to do, and you can order cables from Black > Box or some other company specializing selling cables which connect > crufty legacy hardware. >
DTR/DSR is the most common handshake mechanism for RS-232-B (as opposed to RS-232-C and RS-232-D) devices. This feature has been requested on and off for the last five years. I think it's worthwhile.
-hpa
-- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt
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