123 lines
3.5 KiB
Matlab
123 lines
3.5 KiB
Matlab
classdef DC_supply
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% Simple control of DC supply via fixed GBIB address.
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% Agilent E3646A
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% No OVP or OCP implementation
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% Not tested what happens if this script asks for Voltage in higher V
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% Range (8V vs. 22V)
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properties(Access=public)
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active
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voltage
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end
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methods (Access=public)
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function obj = DC_supply(options)
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arguments
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options.active logical = true
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options.voltage double = [0,0];
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end
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%
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fn = fieldnames(options);
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for n = 1:numel(fn)
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try
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obj.(fn{n}) = options.(fn{n});
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end
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end
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assert(size(obj.voltage,1)==1,'Set Voltage for CH1 and CH2 must be given as vector [V1, V2]');
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assert(size(obj.voltage,2)==2,'Set Voltage for CH1 and CH2 must be given as vector [V1, V2]');
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end
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function success = set(obj,options)
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arguments
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obj
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options.voltage double = obj.voltage;
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end
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success = [0,0];
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try
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%connect to device
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v = visadev("GPIB1::19::INSTR");
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writeline(v, '*IDN?;');
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disp(['DC Source: ' readline(v)]);
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cmd = 'INST:SEL?';
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writeline(v, cmd);
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prev_selected_channel = readline(v);
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for ch = 1:2
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% choose channel
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cmd = ['INST:SEL OUT',num2str(ch)];
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writeline(v, cmd);
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% get current voltage level
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cmd = 'VOLT?';
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writeline(v, cmd);
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act_volt = str2num(readline(v));
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% desired voltage (round to two digits after comma)
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des_volt = round(options.voltage(ch),2);
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cnt = 0;
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while abs(act_volt-des_volt) > 0
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selected_channel = ['OUT',num2str(ch)];
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% get current voltage level
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cmd = 'VOLT?';
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writeline(v, cmd);
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act_volt = str2num(readline(v));
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% difference
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diff_volt = act_volt-des_volt;
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% set new voltage
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increment_voltage = -0.01* sign(diff_volt) ;
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cmd = ['VOLT ',num2str(act_volt+increment_voltage)];
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writeline(v, cmd);
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cnt = cnt+1;
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if mod(cnt,100) == 0
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wait(1);
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end
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% get current voltage level
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cmd = 'VOLT?';
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writeline(v, cmd);
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act_volt = str2num(readline(v));
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end
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% check if voltage is set
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if act_volt ~= des_volt
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hMsgBox = msgbox('An error occurred in dc supply module. Check if voltage is set correctly.');
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uiwait(hMsgBox);
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else
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success(ch) = 1;
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end
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end
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% choose channel
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cmd = ['INST:SEL ',prev_selected_channel];
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writeline(v, cmd);
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%disconnect
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delete(v);
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catch
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end
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end
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end
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end
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