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rINSTCONTROL/@MyLakeshore336/MyLakeshore336.m
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MyLakeshore336.m
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% Class communication with Lakeshore Model 336 temperature controller.
classdef MyLakeshore336 < MyInstrument
properties (Access=public)
temp_unit = 'K'; % temperature unit, K or C
end
properties (SetAccess=protected, GetAccess=public)
temp = {[],[],[],[]}; % cell array of temperatures
setpoint = {[],[],[],[]};
inp_sens_names = {'','','',''}; % input sensor names
heater_rng = {[],[],[],[]}; % cell array of heater range codes
end
properties (Dependent=true)
heater_rng_str % heater range
temp_str % temperatures with measurement unit
end
methods (Access=public)
function this=MyLakeshore336(interface, address, varargin)
this@MyInstrument(interface, address, varargin{:});
connectDevice(this, interface, address);
end
% read
function temp_arr = readAllHedged(this)
openDevice(this);
temp_arr = readTemperature(this);
readHeaterRange(this, 'all');
readSetpoint(this, 'all');
readInputSensorName(this);
closeDevice(this);
end
function temp_arr = readTemperature(this)
% unit = C or K;
tu = this.temp_unit;
cmd_str = [tu,'RDG? A;',tu,'RDG? B;',tu,'RDG? C;',tu,'RDG? D'];
resp_str = query(this.Device, cmd_str);
resp_split = strsplit(resp_str,';','CollapseDelimiters',false);
% convert to numbers
this.temp = cellfun(@str2num,resp_split,'UniformOutput',false);
% create an output array replacing missing readings with NaN
temp_arr = [NaN, NaN, NaN, NaN];
for i=1:4
if ~isempty(this.temp{i})
temp_arr(i) = this.temp{i};
end
end
end
% out_channel is 1-4, in_channel is A-D
function ret = readHeaterRange(this)
cmd_str = 'RANGE? 1;RANGE? 2;RANGE? 3;RANGE? 4';
resp_str = query(this.Device, cmd_str);
resp_split = strsplit(resp_str,';','CollapseDelimiters',false);
this.heater_rng = cellfun(@(s)sscanf(s, '%i'),...
resp_split,'UniformOutput',false);
ret = this.heater_rng;
end
function writeHeaterRange(this, out_channel, val)
if isHeaterRangeOk(this, out_channel, val)
cmd = sprintf('RANGE %i,%i', out_channel, val);
fprintf(this.Device, cmd);
% verify by reading the actual value
readHeaterRange(this);
end
end
function ret = readSetpoint(this)
cmd_str = 'SETP? 1;SETP? 2;SETP? 3;SETP? 4';
resp_str = query(this.Device, cmd_str);
resp_split = strsplit(resp_str,';','CollapseDelimiters',false);
this.setpoint = cellfun(@(s)sscanf(s, '%e'),...
resp_split,'UniformOutput',false);
ret = this.setpoint;
end
function writeSetpoint(this, out_channel, val)
cmd = sprintf('SETP %i,%e', out_channel, val);
fprintf(this.Device, cmd);
% verify by reading the actual value
readSetpoint(this);
end
function ret = readInputSensorName(this)
cmd_str = 'INNAME? A;INNAME? B;INNAME? C;INNAME? D';
resp_str = query(this.Device, cmd_str);
this.inp_sens_names = strtrim(strsplit(resp_str,';',...
'CollapseDelimiters',false));
ret = this.inp_sens_names;
end
function writeInputSensorName(this, in_channel, name)
fprintf(this.Device, ['INNAME ',in_channel, name]);
readInputSensorName(this)
ch_n = inChannelToNumber(this, in_channel);
if ~strcmpi(this.inp_sens_names{ch_n}, name)
warning(['Name of input sensor ',in_channel,...
' could not be changed'])
end
end
end
%% auxiliary method
methods (Access=private)
% check if the heater range code takes a proper value, which is
% channel-dependent
function bool = isHeaterRangeOk(~, out_channel, val)
bool = false;
switch out_channel
case {1,2}
if val>=0 && val <=3
bool = true;
else
warning(['Wrong heater range. Heater range for '...
'channels 1 or 2 can '...
'take only integer values between 0 and 3'])
end
case {3,4}
if val>=0 && val <=1
bool = true;
else
warning(['Wrong heater range. Heater range for '...
'channels 3 or 4 can '...
'take only values 1 or 2.'])
end
end
end
function num = inChannelToNumber(~,in_channel)
switch in_channel
case 'A'
num = int32(1);
case 'B'
num = int32(2);
case 'C'
num = int32(3);
case 'D'
num = int32(4);
otherwise
error('Input channel should be A, B, C or D.')
end
end
end
%% Set and get methods
methods
function str_cell = get.heater_rng_str(this)
str_cell = {'','','',''};
% Channels 1-2 and 3-4 have different possible states
for i=1:4
if ~isempty(this.heater_rng{i})
code = this.heater_rng{i};
else
code=0;
end
if i<=2
switch code
case 0
str_cell{i} = 'Off';
case 1
str_cell{i} = 'Low';
case 2
str_cell{i} = 'Medium';
case 3
str_cell{i} = 'High';
otherwise
end
else
switch code
case 0
str_cell{i} = 'Off';
case 1
str_cell{i} = 'On';
otherwise
end
end
end
end
function str_cell = get.temp_str(this)
str_cell = {'','','',''};
for i=1:4
if ~isempty(this.temp{i})
str_cell{i} = sprintf('%.3f %s', this.temp{i},...
this.temp_unit);
end
end
end
function set.temp_unit(this, val)
if strcmpi(val,'K')||strcmpi(val,'C')
this.temp_unit = upper(val);
else
warning(['Temperature unit needs to be K or C, ',...
'value has not been changed'])
end
end
end
end
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