Controlline, Disarm – Measurement Computing Personal488 rev.3.0 For DOS & Windows 3.Xi User Manual
Page 334
III. COMMAND REFERENCES - 15. Command References
15B. Driver488/SUB, W31, W95, & WNT
Personal488 User’s Manual, Rev. 3.0
III-319
Bus State
Bus Lines
Data Transfer (DIO) Lines
8
7
6
5
4
3
2
1
IEEE 488 Interface
ATN
Attention (&H04)
0
0
0
0
0
1
0
0
EOI
End-Or-Identify (&H80)
1
0
0
0
0
0
0
0
SRQ
Service Request (&H40)
0
1
0
0
0
0
0
0
DAV
Data Valid (&H08)
0
0
0
0
1
0
0
0
NDAC
Not Data Accepted (&H10)
0
0
0
1
0
0
0
0
NRFD
Not Ready For Data (&H20)
0
0
1
0
0
0
0
0
Serial Interface
DTR
Data Terminal Ready (&H02)
0
0
0
0
0
0
1
0
RI
Ring Indicator (&H10)
0
0
0
1
0
0
0
0
RTS
Request To Send (&H01)
0
0
0
0
0
0
0
1
CTS
Clear To Send (&H04)
0
0
0
0
0
1
0
0
DCD
Data Carrier Detect (&H08)
0
0
0
0
1
0
0
0
DSR
Data Set Ready (&H20)
0
0
1
0
0
0
0
0
ControlLine
Driver488/W31 and Driver488/W95 only
SYNTAX
int pascal ControlLine(DevHandleT devHandle);
ControlLine
returns a bit mapped number.
devHandle
refers to the I/O adapter. If
devHandle
refers to an external device,
the
ControlLine
command acts on the hardware interface to which the
external device is attached.
RESPONSE
-1 if error,
otherwise, a bit mapped integer indicating the value of the
control lines.
MODE
Any
BUS STATES
None
SEE ALSO
TimeOut, ControlLine (Driver488/SUB only)
EXAMPLES
result = ControlLine(ieee);
printf(“The response is %X\n”,result);
The
ControlLine
command applies to IEEE 488 devices only. It returns the status of the IEEE 488
bus control lines as an 8-bit unsigned value (bits 2 and 1 are reserved for future use), as shown below:
8
7
6
5
4
3
2
1
EOI
SRQ
NRFD
NDAC
DAV
ATN
0
0
Disarm
SYNTAX
int pascal Disarm(DevHandleT devHandle, ArmCondT condition);
devHandle
refers to either an IEEE 488 interface or an external device. If
devHandle
refers to an external device, then the
Disarm
command acts on
the hardware interface to which the external device is attached.
condition
specifies which of the conditions are no longer to be monitored. If
condition is
0
, then all conditions are
Disarm
ed.
RETURNS
-1 if error
MODE
Any
BUS STATES
None
SEE ALSO
Arm, OnEvent, LightPen
EXAMPLES
errorcode=Disarm(ieee,acTalk|acListen|acChange);