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rINSTCONTROL/@MyLogger/MyLogger.m
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MyLogger.m
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% Generic logger that executes MeasFcn according to MeasTimer, stores the
% results and optionally continuously saves them.
% MeasFcn should be a function with no arguments.
% MeasFcn need to return a row vector of numbers in order to save the log
% in text format or display it. With other kinds of returned values the
% log can still be recorded, but not saved or dispalyed.
classdef MyLogger < handle
properties (Access=public)
% timer object
MeasTimer
% Function that provides data to be recorded
MeasFcn = @()0
save_cont = false
% MyLog object to store the recorded data
Record
end
properties (SetAccess=protected, GetAccess=public)
% If last measurement was succesful
% 0-false, 1-true, 2-never measured
last_meas_stat = 2
end
events
% Event that is triggered each time MeasFcn is successfully executed
NewData
end
methods (Access=public)
function this = MyLogger(varargin)
P=MyClassParser(this);
processInputs(P, this, varargin{:});
this.Record=MyLog(P.unmatched_nv{:});
% Create and confitugure timer
this.MeasTimer = timer();
this.MeasTimer.BusyMode = 'drop';
% Fixed spacing mode of operation does not follow the
% period very well, but is robust with respect to
% function execution delays
this.MeasTimer.ExecutionMode = 'fixedSpacing';
this.MeasTimer.TimerFcn = @(~,event)LoggerFcn(this,event);
end
function delete(this)
%stop and delete the timer
stop(this.MeasTimer);
delete(this.MeasTimer);
end
% Redefine start/stop functions for the brevity of use
function start(this)
start(this.MeasTimer);
end
function stop(this)
stop(this.MeasTimer);
end
end
methods (Access=protected)
% Perform measurement and append point to the log
function LoggerFcn(this, event)
time = datetime(event.Data.time);
try
meas_result = this.MeasFcn();
this.last_meas_stat=1; % last measurement ok
catch
warning(['Logger cannot take measurement at time = ',...
datestr(time)]);
this.last_meas_stat=0; % last measurement not ok
end
if this.last_meas_stat==1
% append measurement result together with time stamp
appendData(this.Record, time, meas_result,...
'save', this.save_cont);
triggerNewData(this);
end
end
%Triggers event for acquired data
function triggerNewData(this)
notify(this,'NewData')
end
end
%% Set and get functions
methods
function set.MeasFcn(this, val)
assert(isa(val,'function_handle'), ...
'''MeasFcn'' must be a function handle.');
this.MeasFcn=val;
end
function set.Record(this, val)
assert(isa(val,'MyLog'), '''Record'' must be a MyLog object')
this.Record=val;
end
function set.save_cont(this, val)
this.save_cont=logical(val);
end
function set.MeasTimer(this, val)
assert(isa(val,'timer'), '''MeasTimer'' must be a timer object')
this.MeasTimer=val;
end
end
end
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