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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. see
## <https://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {} {@var{retval} =} __digitalPin__ (@var{obj})
## Private function
## @end deftypefn
function retval = __digitalPin__(obj, pin, value)
ARDUINO_DIGITAL = 3;
retval = 0;
if !ischar(pin) && !isnumeric(pin)
error ("@arduino.digitalPin: expected pin name as string");
endif
pininfo = obj.get_pin(pin);
if nargin == 2
mode = "digitalinput";
datain = uint8([pininfo.id]);
elseif nargin == 3
mode = "digitaloutput";
if value
val = 1;
else
val = 0;
endif
datain = uint8([pininfo.id val]);
endif
# first use ?
if strcmp(pininfo.mode, "unset")
configurePin(obj, pin, mode)
else
[pinstate, pinmode] = pinStateMode(pininfo.mode);
if !strcmp(pinmode, "digital")
error ("digitalPin: pin is in incompatable mode");
endif
endif
[dataout, status] = __sendCommand__ (obj, 0, ARDUINO_DIGITAL, datain);
if status != 0
error ("digitalPin: failed to set/get pin state err=%d", status);
endif
if nargin == 2
if dataout(2) != 0
retval = 1;
else
retval = 0;
endif
endif
endfunction
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