Keithley KPCI-488 LPA, User Manual

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2-20 Return to Section Topics KPCI-488LPA-900-01 Rev. A / December 2008
Section 2: NI Command Compatible Functions Model KPCI-488LPA GPIB Controller Interface Card User’s Manual
ibist
Description This command sets or clears the board individual status (ist) bit for parallel polling.
Support Level Board level
Syntax Microsoft C/C++ and Borland C++
int ibist (int ud, int ist)
Visual Basic
ibist (ByVal ud As Integer, ByVal v As Integer)
As Integer
- or -
call ibist (ByVal ud As Integer, ByVal v As Integer)
Parameters ud : board descriptor
v : shows whether to set or clear the ist bit
Return Value The value of the ibsta
Error Codes EARG, EDVR, ENEB, EOIP
iblines
Description Returns the GPIB control lines status. The low-order lines byte (bits 0 to 7) shows
that the GPIB interface has the capability to automatically detect the status of each
GPIB control line. The upper byte (bits 8 to 15) shows the status of the GPIB control
line. A description of each byte is listed in
Table 2-10 .
To determine whether a GPIB line is controlled, complete the following steps:
1. Check the appropriate bit of the low byte to ensure the line can be monitored.
2. Check whether the corresponding bit of the upper byte can be monitored (the
appropriate bit of the low byte is 1).
If the checked bit of the upper byte is set (1), the corresponding line is in controlled
status; if the checked bit of the upper byte is clear (0), the corresponding line is not in
controlled status.
Support Level Board level
Syntax Microsoft C/C++ and Borland C++
int iblines (int ud, short *line_status)
Visual Basic
iblines (ByVal ud As Integer, lines As Integer)
As Integer
- or -
call iblines (ByVal ud As Integer, lines As Integer)
Table 2-10
iblines
7 6 5 4 3 2 1 0
EOI ATN SRQ REN INF NRFD NDAC DAV