Talk-only mode is by intention, an exclusive mode, where
there is one talker, and one listener on the bus. There
can be exceptions where there are more than one listener,
but that tends to be unusual.
Addressed mode can have one or more instrument on the
bus. Although addressed mode is fully orchestrated by
the controller, the controller can easily interleave
things in a way that can cause unintended latency in a
critical instrument.
-Chuck Harris
Magnus Danielson wrote:
Poul-Henning,
On 01/17/2016 12:52 PM, Poul-Henning Kamp wrote:
--------
In message <[email protected]>, Magnus Danielson writes:
This is a common misunderstanding: Talk-only does *not* protecting you
against timing issues on GPIB.
On RS-232, yes, but not on GPIB.
Agree, to some degree. It's not a guarantee.
I think you should develop that line of thought, to detail why it helps
on GPIB and why not on serial.
It's really very simple: RS-232 sends blind, you don't even need to
know if there is a receiver or what it does. If the receiver cannot
keep op, data is simply lost.
GPIB handshakes every byte, so the actions of the receiving end affects
the transmitting end - in particular if the receiver cannot keep up.
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