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Highlights from
Tune And Listen

Tune And Listen

by

 

01 Feb 2008 (Updated )

This application allows the user to capture an AM or FM signal, demodulate it and play it out the

tuneAndListen(varargin)
function varargout = tuneAndListen(varargin)
% TUNEANDLISTEN M-file for tuneAndListen.fig
%      TUNEANDLISTEN, by itself, creates a new TUNEANDLISTEN or raises the existing
%      singleton*.
%
%      H = TUNEANDLISTEN returns the handle to a new TUNEANDLISTEN or the handle to
%      the existing singleton*.
%
%      TUNEANDLISTEN('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in TUNEANDLISTEN.M with the given input arguments.
%
%      TUNEANDLISTEN('Property','Value',...) creates a new TUNEANDLISTEN or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before tuneAndListen_OpeningFunction gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to tuneAndListen_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE's Tools menu.  Choose "GUI allows only one
%      instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help tuneAndListen

% Last Modified by GUIDE v2.5 23-Apr-2007 21:33:57

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @tuneAndListen_OpeningFcn, ...
                   'gui_OutputFcn',  @tuneAndListen_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT


% --- Executes just before tuneAndListen is made visible.
function tuneAndListen_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to tuneAndListen (see VARARGIN)

% Choose default command line output for tuneAndListen
handles.output = hObject;
handles.hAcqTimer = timer('Name','Acquisition Timer',...
    'ExecutionMode','fixedSpacing',...
    'Period', .2, ...
    'TimerFcn',@gooseAcquisition,...
    'StopFcn',@acquisitionStop, ...
    'UserData',hObject);

handles.QueryState = 'none';
handles.acqState = 'stopped';
handles.groupName = 'AgilentTechnologiesTuneAndListen';
handles.data = zeros(2,1);  % space for acquisition data
handles.samplePeriod = 1;
handles.preAmpAvail = false;
handles.params = struct('Frequency',getpref(handles.groupName,'Frequency',100.1e6),...
    'Bandwidth',getpref(handles.groupName,'Bandwidth',100e3),...
    'DemodulationType',getpref(handles.groupName,'DemodulationType','am'),...
    'DemodulationTime',getpref(handles.groupName,'DemodulationTime',1),...
    'MaxRange',getpref(handles.groupName,'MaxRange',-10),...
    'AutoRange',getpref(handles.groupName,'AutoRange','on'),...
    'HostName',getpref(handles.groupName,'HostName','localhost'));
updateGuiFromParams(handles);
handles.mxa = visa('agilent','tcpip0::localhost::instr');

set(hObject,'UserData','nothing');

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes tuneAndListen wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = tuneAndListen_OutputFcn(hObject, eventdata, handles) 
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;


function updateGuiFromParams(handles)
set(handles.frequencyText, 'String', sprintf('%f', handles.params.Frequency/1e6));
set(handles.bandwidthText, 'String', sprintf('%8.2f', handles.params.Bandwidth/1e3));
set(handles.timeText, 'String', sprintf('%8.0f', handles.params.DemodulationTime * 1000));
set(handles.powerText, 'String', sprintf('%8.0f', handles.params.MaxRange));

if strcmp(handles.params.DemodulationType,'fm'),
    hObject = handles.fmRadioButton;
else
    hObject = handles.amRadioButton;
end
set(handles.demodPanel,'SelectedObject', hObject);

if strcmp(handles.params.AutoRange,'on'),
    value = get(handles.autoRangeCheckBox,'Max');
    set(handles.powerText,'Enable','off');
else
    value = get(handles.autoRangeCheckBox,'Min');
    set(handles.powerText,'Enable','on');
end
set(handles.autoRangeCheckBox,'Value',value);

% --- Executes on button press in startButton.
function startButton_Callback(hObject, eventdata, handles)
% hObject    handle to startButton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
buttonText = get(hObject, 'String');
if strcmp(buttonText, 'Start'),
    set(handles.startButton,'String','Stop');
    set(hObject,'UserData','acquire');
    enableParameterControls(handles,false);
    start(handles.hAcqTimer);
else
    updateStatus(handles.statusText, 'stopping acquisition...')
    set(handles.startButton,'String','Start');
    stop(handles.hAcqTimer);
end
% drawnow

% ---- Executes on figure close.
function CloseFigure_Callback(hObject,eventdata,handles)
disconnect(hObject,handles, true);
closereq

function gooseAcquisition(hTimer,varargin)
hGui = get(hTimer,'UserData');
handles = guidata(hGui);
updateStatus(handles.statusText, 'acquiring data...');

% setup attenuation, centerfrequency, bwTag, acq_time, and preamp
if strcmp(handles.params.AutoRange, 'on')
    range = -100;
else
    range = handles.params.MaxRange;
end
try
    saListen(handles.mxa, handles.params.Frequency, ...
        handles.params.Bandwidth, ...
        handles.params.DemodulationTime, ...
        range, ...
        handles.params.DemodulationType, ...
        1, 1, ...
        @updateStatus, handles.statusText);
catch
    updateStatus(handles.statusText, 'Error occured.');
    lerrInfo = lasterror;
    updateStatus(handles.statusText, lerrInfo.message);
    stop(handles.hAcqTimer);
end
    
% --- Called when the acquisition timer stops
function acquisitionStop(hTimer, varargin)
hObject = get(hTimer,'UserData');
handles = guidata(hObject);
enableParameterControls(handles,true)
updateStatus(handles.statusText, 'Acquisition stopped.');
set(handles.startButton, 'String', 'Start');
% updateStatus(handles.statusText, 'Acquisition stopping...');

function updateStatus(hStatus, str)
existing_str = get(hStatus,'String');
[m,n] = size(existing_str);
if m > 4,
    existing_str = existing_str(m-3:m,:);
end
new_str = strvcat(existing_str, str);
set(hStatus, 'String', new_str);
drawnow

% --- Executes on button press in closeButton.
function closeButton_Callback(hObject, eventdata, handles)
% hObject    handle to closeButton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
close(gcbf)

% --- displays an error dialog if an error occurs
function dispErrorDialog(errorMessage, dialogTitle, hStatus, statusText)
errordlg(errorMessage,dialogTitle);
updateStatus(hStatus, statusText);

% --- Executes on button press in connectButton.
function connectButton_Callback(hObject, eventdata, handles)
% hObject    handle to connectButton (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
stateText = get(hObject,'String');
    
if strcmp(stateText,'Connect'),
    answer = inputdlg({'Enter hostname of MXA or PSA:'},...
        'MXA Hostname',1, {handles.params.HostName});
    
    if isempty(answer),
        % the user pressed the cancel button so get out of here.
        return
    end
    fclose(handles.mxa);
    delete(handles.mxa);
    handles.params.HostName = answer{1};
    updateStatus(handles.statusText, sprintf('Connecting to %s',handles.params.HostName));
    errorOccurred=0;
    try
        handles.mxa = visa('agilent',['tcpip0::' handles.params.HostName '::instr']);
        % set(handles.mxa,'RemoteHost',handles.params.HostName);
        fopen(handles.mxa);
        fclose(handles.mxa);
    catch
        errorOccurred=1;
    end
    if ~errorOccurred,
        updateStatus(handles.statusText, 'Successfully connected.')
        setpref(handles.groupName,'HostName',handles.params.HostName)
        set(handles.startButton,'Enable','on');
        set(hObject, 'String', 'Disconnect');
    else
        err=lasterror();
        dispErrorDialog(err.message, 'Instrument Connect Error', ...
            handles.statusText, 'Instrument connect failed.');
        disconnect(hObject,handles,false);
    end
else
    disconnect(hObject, handles, false);
    set(hObject, 'String', 'Connect');
end    
guidata(handles.output, handles);

function disconnect(hObject, handles, deleteObjects)
running = get(handles.hAcqTimer,'Running');
if strcmp(running,'on'),
    stop(handles.hAcqTimer)
end
if strcmp(get(handles.mxa,'Status'),'open'),
    fclose(handles.mxa)
    set(handles.startButton, 'Enable', 'off');
end
if deleteObjects
    delete(handles.hAcqTimer);
    delete(handles.mxa)
end
% waitfor(hObject,'UserData','nothing');

function text_Callback(hObject, eventdata, handles)
% hObject    handle to Text object (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of bandwidthText as text
%        str2double(get(hObject,'String')) returns contents of bandwidthText as a double
tag = get(hObject,'Tag');
if strcmp(tag,'autoRangeCheckBox'),
    val=get(hObject,'Value');
    if val == 0,
        handles.params.AutoRange='off';
    else
        handles.params.AutoRange='on';
    end
else
    val=str2double(get(hObject,'String'));
    if ~isnan(val),
        switch tag
            case 'bandwidthText'
                if val<10,
                    val = 10;
                elseif val > 10e6,
                    val = 10e6;
                end
                handles.params.Bandwidth = val * 1e3;
                setpref(handles.groupName,'Bandwidth',handles.params.Bandwidth);
            case 'frequencyText'
                if val < 0,
                    val = 0;
                end
                handles.params.Frequency = val * 1e6;
                setpref(handles.groupName,'Frequency',handles.params.Frequency);
            case 'powerText'
                if val ~= round(val),
                    val = round(val);
                end
                handles.params.MaxRange = val;
                setpref(handles.groupName,'MaxRange',handles.params.MaxRange);
            case 'timeText'
                if val ~= round(val),
                    val = round(val);
                end
                if val < 250,
                    val = 250;
                end
                handles.params.DemodulationTime = val/1000;
                setpref(handles.groupName,'DemodulationTime',handles.params.DemodulationTime);
        end
    end
end
updateGuiFromParams(handles);
guidata(handles.output, handles);

% --- Executes during object creation, after setting all properties.
function text_CreateFcn(hObject, eventdata, handles)
% hObject    handle to bandwidthText (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end

% --------------------------------------------------------------------
function demodPanel_SelectionChangeFcn(hObject, eventdata, handles)
% hObject    handle to demodPanel (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
tag=get(hObject,'Tag');
if strcmp(tag,'fmRadioButton'),
    val = 'fm';
else
    val = 'am';
end
handles.params.DemodulationType = val;
setpref(handles.groupName,'DemodulationType',val);
guidata(handles.output, handles);

function enableParameterControls(handles,enable)
if enable,
    str = 'on';
else
    str = 'off';
end
set(handles.frequencyText,'Enable',str);
set(handles.bandwidthText,'Enable',str);
set(handles.timeText,'Enable',str);
set(handles.frequencyText,'Enable',str);
set(handles.amRadioButton,'Enable',str);
set(handles.fmRadioButton,'Enable',str);
set(handles.powerText,'Enable',str);
set(handles.autoRangeCheckBox,'Enable',str);

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