Plotting data acquired through NI DAQ inside a GUI window

Hey everyone,

So I am trying to acquire data in a GUI by pressing a Start Button.

First, in the code below I created a DAQ session that is a handles, and it updates all the handles to include the DAQ session (by guidata function)

% --- Executes just before FlowLoopGUI is made visible.
function FlowLoopGUI_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 FlowLoopGUI (see VARARGIN)

% Choose default command line output for FlowLoopGUI
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);
   
 % Start data aquisition for Temperature///////////////////////////////
   s_temp=daq.createSession('ni');
    addAnalogInputChannel(s_temp,'Dev2',0, 'Thermocouple');

    s_temp.Rate = 6; %sampling rate

    %sets TC type and units
    tc = s_temp.Channels(1);
    set(tc);
    tc.ThermocoupleType = 'T';
    tc.Units = 'Celsius';
    
    %lh_temp = s_temp.addlistener('DataAvailable',@(src, event)logData(src, event, name));
    %lh1_temp = s_temp.addlistener('DataAvailable', @(src,event) plot(event.TimeStamps, event.Data));

    
     handles.s_temp = s_temp;
     guidata(hObject, handles);
% UIWAIT makes FlowLoopGUI wait for user response (see UIRESUME)
% uiwait(handles.figure1);

Next, pressing the StartButton, I want to acquire data from the DAQ onto the GUI window. This is where I am having trouble...

The data isn't popping up on the window.

% --- 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)

FileName = get(handles.FileName,'String')
power = get(handles.HeatPower,'String')
TestNumber = get(handles.TestNumber,'String')
Date = get(handles.DateText,'String')

FileID = fopen(sprintf('%s.txt', FileName) , 'w');
fid = FileID;
set(handles.StartButton, 'UserData', fid);

fprintf(fid, ['Test Number: ', TestNumber '\n']);
fprintf(fid, ['Date: ', Date '\n']);
fprintf(fid, ['Wattage [W]: ' ,power  '\n']);


%%%%/////THIS IS WHERE THE DAQ STARTS ACQUIRING DATA%%%%%%%%//////
handles.s_temp.IsContinuous = true;

    lh_temp = addlistener(handles.s_temp,'DataAvailable',@(src, event)logData(src, event, name));
   %lh_temp_temp = addlistener(handles.s_temp, 'DataAvailable',{@collectData,handles.axes1});
    lh1_temp = addlistener(handles.s_temp,'DataAvailable', @(src,event) plotDataCont(event.TimeStamps, event.Data);
    startBackground(handles.s_temp);

Here is the plotDataCont function

    function plotDataCont(src,event)
     hold on 
     axes(handles.axes1)
     plot(event.TimeStamps, event.Data(:,1), 'r.');%...
     % event.TimeStamps, event.Data(:,2), 'b.')
     xlabel('time (sec)');
     ylabel('Temperature (Celsius)');
     legend( 'TC_1')
end

Thank you!