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## Copyright (C) 2019 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{val} = } subsref (@var{dev}, @var{sub})
## subref for device
##
## @seealso{device}
## @end deftypefn
function val = subsref (this, s)
if isempty(s)
error ("device.subsref missing index");
endif
if strcmp(this.interface, "SPI")
if s(1).type == "."
fld = tolower(s(1).subs);
switch (fld)
case "pins"
val = {};
for i = 1:numel(this.pins)
val{end+1} = this.pins{i}.name;
endfor
case "interface"
val = this.interface;
case "parent"
val = this.parent;
case "spimode"
val = this.devinfo.mode;
case "bitrate"
val = this.devinfo.bitrate;
case "bitorder"
val = this.devinfo.bitorder;
case "spichipselectpin"
val = this.devinfo.chipselectpin;
case "misopin"
val = get_func_pin(this.pins, "miso");
case "mosipin"
val = get_func_pin(this.pins, "mosi");
case "sckpin"
val = get_func_pin(this.pins, "sck");
otherwise
error ("device.subsref invalid property '%s'", fld);
endswitch
else
error("unimplemented device.subsref type");
endif
elseif strcmp(this.interface, "Serial")
if s(1).type == "."
fld = tolower(s(1).subs);
switch (fld)
case "pins"
val = {};
for i = 1:numel(this.pins)
val{end+1} = this.pins{i}.name;
endfor
case "interface"
val = this.interface;
case "parent"
val = this.parent;
case "baudrate"
val = this.devinfo.baudrate;
case "databits"
val = this.devinfo.databits;
case "stopbits"
val = this.devinfo.stopbits;
case "parity"
val = this.devinfo.parity;
case "timeout"
val = this.devinfo.timeout;
case "numbytesavailable"
val = __getBytesAvailable__(this);
case "serialport"
val = this.devinfo.id;
otherwise
error ("device.subsref invalid property '%s'", fld);
endswitch
else
error("unimplemented device.subsref type");
endif
else # I2C
if s(1).type == "."
fld = tolower(s(1).subs);
switch (fld)
case "pins"
val = {};
for i = 1:numel(this.pins)
val{end+1} = this.pins{i}.name;
endfor
case "interface"
val = this.interface;
case "parent"
val = this.parent;
case "bus"
val = this.devinfo.bus;
case "i2caddress"
val = this.devinfo.address;
case "bitrate"
val = this.devinfo.bitrate;
case "sdapin"
val = get_func_pin(this.pins, "sda");
case "sclpin"
val = get_func_pin(this.pins, "scl");
otherwise
error ("device.subsref invalid property '%s'", fld);
endswitch
else
error("unimplemented device.subsref type");
endif
endif
if (numel (s) > 1)
val = subsref (val, s(2:end));
endif
endfunction
function val = get_func_pin(pins, func)
val = [];
for i=1:numel(pins)
pin = pins{i};
if strcmp(pin.func, func)
val = pin.name;
endif
endfor
endfunction
%!test
%! ar = arduino();
%! spi = device (ar, "spichipselectpin", "d10");
%! assert (spi.spichipselectpin, "d10")
%! assert (isarduino(spi.parent))
%! assert (ar.port, spi.parent.port)
%! assert (spi.spimode, 0)
%! assert (spi.bitorder, "msbfirst")
%! assert (spi.interface, "SPI")
%! assert (numel(spi.pins) >= 4)
%! fail ("spi.invalid")
%! delete(spi)
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