Astronics 407661-001, User Manual

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Publication No. 980824-114 Rev. A 1260-114 User Manual
Astronics Test Systems Module Operation 3-3
Figure 3-1, Message-Based Mode of Operation
In the register-based mode, the user writes directly to the port
registers on the 1260-114 module. The 1260-01T command
module does not monitor these operations, and does not keep
track of the port states on the 1260-114 module in this mode.
A conceptual view of the register-based mode is shown in
Figure 3-2 below.
Figure 3-2, Register-Based Mode of Operation
Since the 1260-01T switch controller does not keep track of port
and control register states during the register-based mode, it is
advisable to use
either the message-based or the register-based
mode consistently, and use the chosen mode exclusively
throughout the application program.
In general, the message-based mode of operation is easier to use
with utility software such as the National Instruments VXI
Interactive Control (VIC) program. The message-based mode
allows the user to send ASCII text commands to the 1260-01T and
to read replies from the 1260-01T. In addition, some features,
such as synchronous port operation, are available only in the
message-based mode. An added benefit of message-based
operation is that it obviates the need to manually configure control
registers on the 1260-114, controlling such things as port data
direction, since these are handled automatically by the 1260-01T.
PC (MXI) 1260-01T
1260-114
VXIbus
"DIG:INP? (@1(1))" Read from A24 Address {base
a 0x401}
PC (MXI) 1260-114
Read from A24 Address {base a
0x401}