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MyLakeshore336.m
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Tue, May 21, 22:08

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
% output modes{{mode, cntl_inp, powerup_en},...}
out_mode = {{[0,0,0]},{[0,0,0]},{[0,0,0]},{[0,0,0]}};
end
properties (SetAccess=private, GetAccess=public)
% Correspondense lists. Indexing starts from 0
inp_list = {'None','A','B','C','D'};
out_mode_list = {'Off','Closed loop PID','Zone',...
'Open loop','Monitor out','Warmup supply'};
heater12_rng_list = {'Off','Low','Medium','High'};
heater34_rng_list = {'Off','On'};
end
properties (Dependent=true)
heater_rng_str % heater range
temp_str % temperatures with measurement unit
out_mode_str %
cntl_inp_str %
powerup_en_str %
end
methods (Access=public)
function this=MyLakeshore336(interface, address, varargin)
this@MyInstrument(interface, address, varargin{:});
connectDevice(this);
end
% read
function temp_arr = readAllHedged(this)
openDevice(this);
temp_arr = readTemperature(this);
readHeaterRange(this);
readSetpoint(this);
readInputSensorName(this);
readOutMode(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_str = sprintf('SETP %i,%.3f', out_channel, val);
fprintf(this.Device, cmd_str);
% 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
function ret = readOutMode(this)
cmd_str = 'OUTMODE? 1;OUTMODE? 2;OUTMODE? 3;OUTMODE? 4';
resp_str = query(this.Device, cmd_str);
resp_split = strsplit(resp_str,';','CollapseDelimiters',false);
this.out_mode = cellfun(@(s)sscanf(s, '%i,%i,%i'),...
resp_split,'UniformOutput',false);
ret = this.out_mode;
end
function writeOutMode(this,out_channel,mode,cntl_inp,powerup_en)
cmd_str = sprintf('OUTMODE %i,%i,%i,%i',out_channel,...
mode,cntl_inp,powerup_en);
fprintf(this.Device, cmd_str);
% verify by reading the actual value
readOutMode(this);
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})
ind = int32(this.heater_rng{i}+1);
else
ind=0;
end
if i<=2
str_cell{i} = this.heater12_rng_list{ind};
else
str_cell{i} = this.heater34_rng_list{ind};
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 str_cell = get.out_mode_str(this)
str_cell = {'','','',''};
try
for i=1:4
ind = int32(this.out_mode{i}(1)+1);
str_cell{i} = this.out_mode_list{ind};
end
catch
warning(['Output mode could not be interpreted ',...
'from code. Code should be between 0 and 5.'])
end
end
function str_cell = get.cntl_inp_str(this)
str_cell = {'','','',''};
try
for i=1:4
ind = int32(this.out_mode{i}(2)+1);
str_cell{i} = this.inp_list{ind};
end
catch
warning(['Input channel could not be interpreted ',...
'from index. Index should be between 0 and 4.'])
end
end
function str_cell = get.powerup_en_str(this)
str_cell = {'','','',''};
for i=1:4
if this.out_mode{i}(3)
str_cell{i} = 'On';
else
str_cell{i} = 'Off';
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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