ibdev() is used to obtain a device descriptor, which can then be used by
other functions in the library. The argument board_index
specifies which GPIB interface board the device is connected to.
The pad
and sad
arguments specify
the GPIB address of the device to be opened (see ibpad() and ibsad()).
The timeout for io operations is specified by timeout
(see ibtmo()). If
send_eoi
is nonzero, then the EOI
line will be asserted with the last byte sent during writes (see
ibeot()).
Finally, the eos
argument specifies the end-of-string character and whether or not its
reception should terminate reads (see ibeos()).