NAME

       ibwrt - write data bytes (board or device)

SYNOPSIS

       #include <gpib/ib.h>

       int ibwrt(int ud, const void *data, long num_bytes);

DESCRIPTION

       ibwrt() is used to write data bytes to a device or board. The argument ud can be either a device or board
       descriptor.  num_bytes specifies how many bytes are written from the user-supplied array data. EOI may be
       asserted with the last byte sent or when the end-of-string character is sent (see ibeos() and ibeot()).
       The write operation may be interrupted by a timeout (see ibtmo()), the board receiving a device clear
       command, or receiving an interface clear.

       If ud is a device descriptor, then the library automatically handles addressing the device as listener
       and the interface board as talker, before sending the data bytes onto the bus.

       If ud is a board descriptor, the board simply writes the data onto the bus. The controller-in-charge must
       address the board as talker.

       After the ibwrt() call, ibcnt and ibcntl are set to the number of bytes written.

RETURN VALUE

       The value of ibsta is returned.

COPYRIGHT

       Copyright © 2003-2006, 2008 Frank Mori Hess

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