Measurement Computing Personal488 rev.3.0 - Manual (Page 70)

Personal488 for Windows 95/98/Me/NT/2000 04-10-01 API Reference 6-2
Arm
Syntax INT WINAPI Arm(DevHandleT devHandle, ArmCondT condition);
devHandle refers to either an IEEE 488 hardware interface or an external device. If
devHandle refers to an external device, the Arm command acts on the hardware
interface to which the external device is attached.
condition is one of the following: acSRQ , acDigMatch
Returns -1 if DevHandleT is an illegal device or interface
otherwise, the current state of the event trigger flag
Bus States None
Example errorflag = Arm(ieee, acSRQ);
See Also Disarm, OnEvent, DigArmSetup, DigSetup
The Arm command allows Driver488 to signal to the user-specified function when one or more of the
specified conditions occurs. Arm sets a flag for each implementation of the conditions that are user-
indicated. Arm conditions may be combined using the bitwise OR operator.
The following Arm conditions are supported:
Condition Description
acSRQ The Service Request bus line is asserted.
acDigMatch The digital port match condition has occurred. See notes.
Notes:
(1) The acDigMatch event is only available with the Personal488/ATpnp and the Personal488/PCI.
(2) The use of the acDigMatch event requires configuration of the digital port via DigSetup and
setting a match value via DigArmSetup.