-------- In message <[email protected]>, Chuck Harris writes: >Talk-only mode is by intention, an exclusive mode, where >there is one talker, and one listener on the bus.
Wrong. There can *always* be multiple listeners on GPIB, this is why it has a three wire handshake. The slowest listener sets the pace, individually for each byte. >GPIB is half duplex. Correct. >You have to turn the line around to tell it >give-me-the-next-sample. Wrong. There is no requirement to turn the line around (= send commands) between measurements. EOI is only indicative, it does not require an UNTALK+TALK sequence. Most instruments can be commanded to measure and spew data at you in "talk-only" fashion. > Talk-only avoids that. Talk-only is one way to avoid that. As I said from the start: Talk-Only doesn't really make that much difference, the three-wire handshake is sufficient to cause trouble. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [email protected] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
