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rINSTCONTROL/@MyInstrument/MyInstrument.m
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MyInstrument.m
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classdef MyInstrument < dynamicprops
properties (SetAccess=protected, GetAccess=public)
name='';
interface='';
address='';
%Logical for whether gui is enabled
enable_gui=false;
%Contains the GUI handles
Gui;
%Contains the device object
Device;
%Input parser for class constructor
Parser;
%Contains a list of the commands available for the instrument as
%well as the default values and input requirements
CommandList;
%Parses commands using an inputParser object
CommandParser;
%Trace object for storing data
Trace=MyTrace();
end
properties (Dependent=true)
command_names;
command_no;
end
events
NewData;
end
methods (Access=public)
function this=MyInstrument(name, interface, address, varargin)
createParser(this);
parse(this.Parser,name,interface,address,varargin{:});
%Loads parsed variables into class properties
this.name=this.Parser.Results.name;
this.interface=this.Parser.Results.interface;
this.address=this.Parser.Results.address;
this.enable_gui=~ismember('gui',this.Parser.UsingDefaults);
%If a gui input is given, load the gui
if this.enable_gui
%Loads the gui from the input gui string
this.Gui=guihandles(eval(this.Parser.Results.gui));
%Sets figure close function such that class will know when
%figure is closed
set(this.Gui.figure1, 'CloseRequestFcn',...
@(hObject,eventdata) closeFigure(this, hObject, ...
eventdata));
end
end
function delete(this)
%Removes close function from figure, prevents infinite loop
if this.enable_gui
set(this.Gui.figure1,'CloseRequestFcn','');
%Deletes the figure handles
structfun(@(x) delete(x), this.Gui);
%Removes the figure handle to prevent memory leaks
this.Gui=[];
end
%Closes the connection to the device
closeDevice(this);
%Deletes the device object
delete(this.Device);
clear('this.Device');
end
%Clears data from trace to save memory.
function clearData(this)
this.Trace.x=[];
this.Trace.y=[];
end
%Writes properties to device. Can take multiple inputs. With the
%option init_device, the function writes default to all the
%available writeable parameters.
function writeProperty(this, varargin)
%Parses the inputs using the CommandParser
parse(this.CommandParser, varargin{:});
if ~this.CommandParser.Results.write_all_defaults
%Finds the writeable commands that are supplied by the user
ind=~ismember(this.CommandParser.Parameters,...
this.CommandParser.UsingDefaults);
%Creates a list of commands to be executed
exec=this.CommandParser.Parameters(ind);
else
exec=this.CommandParser.Parameters;
%Removes write_all_defaults from the list of commands to be
%executed
exec(strcmp(exec,'write_all_defaults'))=[];
end
for i=1:length(exec)
%Creates the write command using the right string spec
write_command=[this.CommandList.(exec{i}).command,...
' %',this.CommandList.(exec{i}).str_spec];
%Gets the value to write to the device
this.(exec{i})=this.CommandParser.Results.(exec{i});
command=sprintf(write_command, this.(exec{i}));
%Sends command to device
fprintf(this.Device, command);
end
end
%Wrapper for writeProperty that opens the device
function writePropertyHedged(this, varargin)
this.openDevice();
try
this.writeProperty(varargin{:});
catch
disp('Error while writing the properties:');
disp(varargin);
end
this.readAll();
closeDevice(this);
end
function result=readProperty(this, varargin)
result=struct();
ind=cellfun(@(x) contains(this.CommandList.(x).access,'r'),...
varargin);
exec=varargin(ind);
if any(~ind)
disp('Some specified properties are write-only:')
non_exec=varargin(~ind);
disp(non_exec{:});
end
for i=1:length(exec)
%Creates the correct read command
read_command=[this.CommandList.(exec{i}).command,'?'];
%Reads the property from the device and stores it in the
%correct place
res_str = query(this.Device,read_command);
if strcmp(this.CommandList.(exec{i}).attributes{1},'string')
result.(exec{i})= res_str(1:(end-1));
else
result.(exec{i})= str2double(res_str);
end
end
end
function result = readPropertyHedged(this, varargin)
this.openDevice();
try
result = this.readProperty(varargin{:});
catch
disp('Error while reading the properties:');
disp(varargin);
end
this.closeDevice();
end
% Execute all the read commands and update corresponding properties
function readAll(this)
ind=cellfun(@(x) contains(this.CommandList.(x).access,'r'),...
this.command_names);
result=readProperty(this, this.command_names{ind});
res_names=fieldnames(result);
for i=1:length(res_names)
this.(res_names{i})=result.(res_names{i});
end
end
end
methods (Access=private)
function createParser(this)
p=inputParser;
addRequired(p,'name',@ischar);
addRequired(p,'interface',@ischar);
addRequired(p,'address',@ischar);
addParameter(p,'gui','placeholder',@ischar);
this.Parser=p;
end
end
methods (Access=protected)
%Triggers event for acquired data
function triggerNewData(this)
notify(this,'NewData')
end
%Checks if the connection to the device is open
function bool=isopen(this)
bool=strcmp(this.Device.Status, 'open');
end
%Adds a command to the CommandList
function addCommand(this, tag, command, varargin)
p=inputParser;
addRequired(p,'tag',@ischar);
addRequired(p,'command',@ischar);
addParameter(p,'default','placeholder');
addParameter(p,'attributes','placeholder',@iscell);
addParameter(p,'str_spec','d',@ischar);
%If the write flag is on, it means this command can be used to
%write a parameter to the device
addParameter(p,'access','rw',@ischar);
addParameter(p,'conv_factor',1,@isnumeric);
parse(p,tag,command,varargin{:});
%Adds the command to be sent to the device
this.CommandList.(tag).command=command;
this.CommandList.(tag).access=p.Results.access;
write_flag=contains(p.Results.access,'w');
% read_flag=contains(p.Results.access,'r');
%Adds a default value and the attributes the inputs must have
%and creates a new property in the class
if write_flag
%Adds the string specifier to the list
this.CommandList.(tag).str_spec=p.Results.str_spec;
%Adds the default value
this.CommandList.(tag).default=p.Results.default;
%Adds the necessary attributes for the input to the command
this.CommandList.(tag).attributes=p.Results.attributes;
%Adds a conversion factor for displaying the value
this.CommandList.(tag).conv_factor=p.Results.conv_factor;
%Adds a property to the class corresponding to the tag
addprop(this,tag);
end
end
%Creates inputParser using the command list
function createCommandParser(this)
%Use input parser
%Requires input of the appropriate class
p=inputParser;
p.StructExpand=0;
%Flag for whether the command should initialize the device with
%defaults
addParameter(p, 'write_all_defaults',false,@islogical);
for i=1:this.command_no
%Adds optional inputs for each command, with the
%appropriate default value from the command list and the
%required attributes for the command input.
addParameter(p, this.command_names{i},...
this.CommandList.(this.command_names{i}).default),...
@(x) validateattributes(x,...
this.CommandList.(this.command_names{i}).attributes{1:end});
end
this.CommandParser=p;
end
%Connects to the device if it is not connected
function openDevice(this)
if ~isopen(this)
try
fopen(this.Device);
catch
try
instr_list=instrfind('RemoteHost',this.address);
fclose(instr_list);
fopen(this.Device);
warning('Multiple instrument objects of address %s exist',...
this.address);
catch
error('Could not open device')
end
end
end
end
%Closes the connection to the device
function closeDevice(this)
if isopen(this)
try
fclose(this.Device);
catch
error('Could not close device')
end
end
end
%Close figure callback simply calls delete function for class
function closeFigure(this,~,~)
delete(this);
end
end
%% Get functions
methods
function command_names=get.command_names(this)
command_names=fieldnames(this.CommandList);
end
function command_no=get.command_no(this)
command_no=length(this.command_names);
end
end
end
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