Filter
Top Products
Chapter 3 Software Overview
NI-VXI User Manual 3-20 © National Instruments Corporation
default handler provides examples of how to parse commands, respond
to queries, and generate protocol errors.
SetWSSEcmdHandler (func)
SetWSSEcmdHandler
replaces the current
WSSEcmd
interrupt handler
with an alternate handler. While Word Serial operations are enabled,
the
WSSEcmd
interrupt handler is called whenever an Extended
Longword Serial command is received. A default handler,
DefaultWSSEcmdHandler
, is supplied in source code as an example,
and is automatically installed when
InitVXIlibrary
is called.
SetWSSLcmdHandler (func)
SetWSSLcmdHandler
replaces the current
WSSLcmd
interrupt handler
with an alternate handler. While Word Serial operations are enabled,
the
WSSLcmd
interrupt handler is called whenever a Longword Serial
command is received. A default handler,
DefaultWSSLcmdHandler
,
is supplied in source code as an example, and is automatically installed
when
InitVXIlibrary
initializes the NI-VXI software.
SetWSSrdHandler (func)
SetWSSrdHandler
replaces the current
WSSrd
interrupt handler with
an alternate handler. When
WSSrd
reaches the specified count or an
END bit, or an error occurs, it calls the
WSSrd
interrupt handler with
the status of the call. A default handler,
DefaultWSSrdHandler
, is
automatically installed when
InitVXIlibrary
is called. The default
handler puts the status and read count in a global variable and flags the
operation complete.
SetWSSwrtHandler (func)
SetWSSwrtHandler
replaces the current
WSSwrt
interrupt handler
with an alternate handler. When
WSSwrt
reaches the specified count or
an error occurs, it calls the
WSSwrt
interrupt handler with the status of
the call. The DOR bit will be cleared before WR is set on the last byte
of transfer.
InitVXIlibrary
automatically installs a default handler,
DefaultWSSwrtHandler
, when it initializes the NI-VXI software.
The default handler puts the status and read count in a global variable
and flags the operation complete.