8-16 HP IBASIC Supplement
Interfacing with External Devices
General Bus Management
Passing and Regaining Control
Active control of the bus can be passed between controllers using the
PASS CONTROL command. The following statements first define the
GPIB interface's select code and the new active controller's primary
address and then pass control to that controller.
100 Hp_ib=7
110 New_ac_addr=20
120 PASS CONTROL 100*Hp_ib+New_ac_addr
Once the new active controller has accepted active control, the controller
passing control assumes the role of a non-active controller on the
specified GPIB interface. The concept of using pass control with IBASIC
is discussed in the next section, “The IBASIC GPIB Model.”
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