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## Copyright (C) 2018 John Donoghue <john.donoghue@ieee.org>
##
## 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.
## -*- texinfo -*-
## @deftypefn {} {@var{ret} = } isTerminalDigital(@var{obj}, @var{terminal})
## Return true if pin is capable of digital functions
##
## @subsubheading Inputs
## @var{ar} - the connected arduino object
##
## @var{terminal} is a terminal number to check
##
## @subsubheading Outputs
## @var{ret} return 1 if terminal is a digital pin, 0 otherwise
## @end deftypefn
function retvalue = isTerminalDigital (obj, terminal)
if nargin != 2
error ('@arduino.isTerminalDigital: expected single terminal value');
endif
pininfo = obj.get_pin (terminal);
idx = find (cellfun(@(x) strcmpi (x, "digital"), pininfo.modes), 1);
if isempty (idx)
retvalue = false;
else
retvalue = true;
endif
endfunction
%!shared ar
%! ar = arduino();
%!assert(isTerminalDigital(ar,"d0"), true);
%!assert(isTerminalDigital(ar,getTerminalsFromPins(ar, "d0")), true);
%!assert(isTerminalDigital(ar,"a0"), true);
%!error <undefined> isTerminalDigital()
%!error <expected single terminal value> isTerminalDigital(ar)
# octave 7 returns: # function called with too many inputs
# octave 6 returns: expected single terminal value
%!error isTerminalDigital(ar, "d1", 1)
%!error <unknown pin> isTerminalDigital(ar, -1)
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