Date: Wed, 17 Nov 2004 17:18:52 +1030 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: freebsd-hackers@freebsd.org Subject: Userland access to modem control lines? Message-ID: <200411171719.16370.doconnor@gsoft.com.au>
next in thread | raw e-mail | index | archive | help
[-- Attachment #1 --] Hi, Does anyone know of a way to manipulate the modem control lines from userland? SVR4 has termiox and friends but I can't see an equivalent for FreeBSD. The reason I ask is I am trying to talk to an RS485 bus - it is half duplex and the protocol converter uses RTS to control the data direction. I have a kernel driver which handles this but it has it's limitations (eg takes over the port and boot up, only usable on certain devices). I'm going to make it a line discipline eventually, but this was a stepping stone. Thanks. -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (FreeBSD) iD8DBQBBmvRs5ZPcIHs/zowRApb4AJ4zuG2Qo3iFimpnCydaq/1+D9U28wCeNZVZ 89n6Gc8AJiH0Upl4iDyopRs= =2MLl -----END PGP SIGNATURE-----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200411171719.16370.doconnor>