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Chapter 3 Software Overview
© National Instruments Corporation 3-21 NI-VXI User Manual
WSSabort (abortop)
WSSabort
aborts the Servant Word Serial operation(s) in progress. It
returns an error code of
ForcedAbort
to the
WSSrd
or
WSSwrt
interrupt handlers in response to the corresponding pending functions.
This may be necessary if the application needs to abort for some
application-specific reason, or if the Commander of this device sends a
Word Serial Clear, End Normal Operation, or Abort command.
WSSdisable ()
WSSdisable
disables all Servant Word Serial functions from being
used. More precisely, this function desensitizes the local CPU to
interrupts generated when writing a Word Serial command to the Data
Low register or reading a response from the Data Low register.
WSSenable ()
WSSenable
enables all Servant Word Serial functions. More precisely,
this function sensitizes the local CPU to interrupts generated when
writing a Word Serial command to the Data Low register or reading a
response from the Data Low register. By default, the Servant Word
Serial functions are disabled. At any time after
InitVXIlibrary
initializes the NI-VXI software, you can call
WSSenable
to set up
processing of Servant Word Serial commands and queries.
WSSLnoResp ()
WSSLnoResp
sets the WR bit so that it is ready to accept any further
Longword Serial commands. The
WSSLcmd
interrupt handler should
call
WSSLnoResp
after processing a Longword Serial command (it
calls
WSSLsendResp
for Longword Serial queries).
WSSLsendResp (response)
WSSLsendResp
responds to a Longword Serial Protocol query from a
VXI message-based Commander device. The
WSSLcmd
interrupt
handler calls this function to respond to a Longword Serial query. If a
previous response has not been read yet, a
WSSLsendResp
call
generates a Multiple Query Error (MQE). Otherwise, it writes a
response value to the Data High and Data Low registers and sets the
RR bit. It also sets the WR bit so that it is ready to accept any further
Word Serial commands.