Enter (controller mode) – Measurement Computing Micro 488/EX rev.2.1 User Manual

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Section 5

Command Descriptions

5.30

ENTER (Controller mode)

The ENTER command reads data from the IEEE bus. If a device address (with

optional secondary address) is specified, that device will be addressed to talk. If no
address is specified, the Micro488/EX must already be configured to receive data,
either as a result of an immediately preceding ENTER command, or as a result of a
SEND

sub-command. A time-out error will occur (if enabled) if the Micro488/EX does

not receive a data byte within the time out period after issuing the ENTER command.

If the character count, count, is specified, then exactly that number of characters

will be read from the device with the serial output terminators appended. Otherwise,
ENTER

terminates reception on detection of the line feed (LF) character, which may be

overridden by specifying the terminator in the ENTER command.

If a terminator, term, option is specified, all CR and LF characters in the input

data are unconditionally discarded. When the specified terminator is detected, it is
discarded and replaced with the serial terminator(s) before being returned to the serial
host. The optional terminator applies ONLY to the ENTER command it is sent with.
The terminator returns to a Line Feed on subsequent ENTER commands.

If the EOI option is specified, all characters are returned to the host until the EOI

line is detected. The character sent with EOI asserted is also returned followed by the
serial output terminator(s).

SYNTAX

addr

is the IEEE bus device address.

count

is the number of characters to ENTER.

term

and EOI override the normal IEEE bus input LF terminator.

RESPONSE

Device-dependent data. If count is specified, then count characters
will be returned followed by the serial output terminators. Otherwise
the response ends when the IEEE bus input terminator is detected and
the serial output terminators are appended to the returned data.