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## Copyright (C) 2013 Stefan Mahr <dac922@gmx.de>
##
## This program is free software; you can redistribute it and/or modify it under
## the terms of the GNU General Public License as published by the Free Software
## Foundation; either version 3 of the License, or (at your option) any later
## version.
##
## This program is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
## details.
##
## You should have received a copy of the GNU General Public License along with
## this program; if not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {} fwrite (@var{obj}, @var{data})
## @deftypefnx {Function File} {} fwrite (@var{obj}, @var{data}, @var{precision})
## @deftypefnx {Function File} {} fwrite (@var{obj}, @var{data}, @var{mode})
## @deftypefnx {Function File} {} fwrite (@var{obj}, @var{data}, @var{precision}, @var{mode})
## Writes @var{data} to GPIB instrument
##
## @var{obj} is a GPIB object
##
## @var{data} data to write
## @var{precision} precision of data
## @var{mode} sync
##
## @end deftypefn
## TODO:
function fwrite(obj, data, precision, mode)
defaultmode = "sync";
if (nargin < 2)
print_usage ();
elseif (nargin < 3)
precision = [];
mode = defaultmode;
elseif (nargin < 4)
%% is 3rd argument precision or mode
if (strcmp (precision,'sync') || strcmp (precision,'async'))
mode = precision;
precision = [];
else
mode = "sync";
end
end
if (strcmp (mode,'async'))
error ("async mode not supported yet");
end
switch (precision)
case {"char" "schar" "int8"}
data = int8 (data);
case {"uchar" "uint8"}
data = uint8 (data);
case {"int16" "short"}
data = int16 (data);
case {"uint16" "ushort"}
data = uint16 (data);
case {"int32" "int"}
data = int32 (data);
case {"uint32" "uint"}
data = uint32 (data);
case {"long" "int64"}
data = int64 (data);
case {"ulong" "uint64"}
data = uint64 (data);
case {"single" "float" "float32"}
data = single (data);
case {"double" "float64"}
data = double (data);
case []
%% use data as it is
otherwise
error ("precision not supported");
end
%% should we handle endianess ?
gpib_write (obj, typecast(data,'uint8'));
end
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