Source handshake, See also, Programmed i/o – National Instruments NI-488.2 User Manual
Page 127: Serial poll
Glossary
© National Instruments Corporation
G-7
PPU
Parallel Poll Unconfigure—The GPIB command used to disable any device
from participating in polls.
programmed I/O
Low-speed data transfer between the GPIB interface and memory in
which the CPU moves each data byte according to program instructions.
See also
.
R
resynchronize
When the driver indicates to the application that asynchronous I/O
operations have completed.
RQS
Request Service.
S
s
Seconds.
SDC
Selected Device Clear—The GPIB command used to reset internal or
device functions of an addressed Listener. See also
.
semaphore
An object that maintains a count between zero and some maximum value,
limiting the number of threads that are simultaneously accessing a shared
resource.
serial poll
The process of polling and reading the status byte of one device at a time.
See also
service request
See SRQ.
source handshake
The GPIB interface function that transmits data and commands. Talkers use
this function to send data, and the Controller uses it to send commands.
See also
and
SPD
Serial Poll Disable—The GPIB command used to cancel an SPE command.
SPE
Serial Poll Enable—The GPIB command used to enable a specific device
to be polled. That device must also be addressed to talk. See also SPD.
SRQ
Service Request—The GPIB line that a device asserts to notify the CIC that
the device needs servicing.