ibrsc — request system control (board)
#include <gpib/ib.h>
int ibrsc( | ud, | |
request_control) ; |
int ud
;int request_control
;
If request_control
is nonzero, then the board
specified by the board descriptor ud
is
made system controller. If request_control
is zero, then the board releases system control.
The system controller has the ability to assert the REN and IFC lines, and is typically also the controller-in-charge. A GPIB bus may not have more than one system controller.
The value of ibsta is returned.