NAME

       ibrsc - request system control (board)

SYNOPSIS

       #include <gpib/ib.h>

       int ibrsc(int ud, int request_control);

DESCRIPTION

       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. Automatic assertion of REN is controlled with ibconfig(). If the IbcSRE
       configuration option has been set for the board descriptor ud then REN will automatically be asserted
       when the board becomes system controller. The configuration option IbcSRE is set by default. A GPIB bus
       may not have more than one system controller.

RETURN VALUE

       The value of ibsta is returned.

COPYRIGHT

       Copyright © 2003-2006, 2008 Frank Mori Hess

linux-gpib 4.3.7                                   11/28/2025                                           IBRSC(3)