Accelerometer data MatLab GUI

Question

Amed 2013-2-1

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/60864-accelerometer-data-matlab-gui

回答： ASHISHREDDY THUMMALA 2019-4-14

Hello i'm trying to read in raw data from an accelerometer thru my matlab GUI. I have a pushbutton for serial read, calibration, and port closing that all work fine but i'm trying to create a button that will read in raw data from the accelerometer port.

% START DATA - PUSHBUTTON6
function pushbutton6_Callback(hObject, eventdata, handles)
function [gx gy gz] = readAcc(out,calCo)
          %mapping between analog inputs and X,Y,Z axes.
  %         Xch = 1;
  %         Ych = 3;
  %         Zch = 2;
          fprintf(out.s,'R');
          %read voltages from accelerometer and reorder
          reordered(1)= fscanf(out.s,'%u');
          reordered(2)= fscanf(out.s,'%u');
          reordered(3)= fscanf(out.s,'%u');
          %determine what offset and gain values to use
          offset = calCo.offset;
          gain = calCo.g;
          accel = (reordered - offset) ./ gain;
          %map analog inputs to axes
          gx = accel(1);
          gy = accel(2);
          gz = accel(3);
  end
guidata(hObject, handles);

The error i'm getting is

Error: File: BW2.m Line: 161 Column: 1 The function "readAcc" was closed with an 'end', but at least one other function definition was not. To avoid confusion when using nested functions, it is illegal to use both conventions in the same file.

even if I delete the bottom 'end' function, I press the pushbutton and nothing reads out.

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Daniell Algar 2013-2-1

在 MATLAB Online 中打开

No, I ment

function pushbutton6_Callback(hObject, eventdata, handles)
            %mapping between analog inputs and X,Y,Z axes.
    %         Xch = 1;
    %         Ych = 3;
    %         Zch = 2;
            fprintf(out.s,'R');
            %read voltages from accelerometer and reorder
            reordered(1)= fscanf(out.s,'%u');
            reordered(2)= fscanf(out.s,'%u');
            reordered(3)= fscanf(out.s,'%u');
            %determine what offset and gain values to use
            offset = calCo.offset;
            gain = calCo.g;
            accel = (reordered - offset) ./ gain;
            %map analog inputs to axes
            handles.gx = accel(1);
            handles.gy = accel(2);
            handles.gz = accel(3);
            guidata(hObject, handles)

Notice that the readacc() function is gone, and you've put the data into handles instead. Not a must, but my suggestion.

Observe that you might need to initialise the handles.gx, .gy and .gz in your GUI's main_OpeningFcn(), found in the beginning of the .m-file of the GUI (if you've been using GUIDE, that is). I.e.

function main_OpeningFcn(hObject, eventdata, handles)
...
handles.gx= 0;
handles.gy= 0;
...

You can then access the variables from anywhere in the gui by the handles.

Amed 2013-2-1

在 MATLAB Online 中打开

Hi yes, sorry I was in class. I receive the following error: Undefined variable "out" or class "out.s".

Error in BW2>pushbutton6_Callback (line 132) fprintf(out.s,'R');

Error in gui_mainfcn (line 96) feval(varargin{:});

Error in BW2 (line 42) gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)BW2('pushbutton6_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback

>>

for this code

function pushbutton6_Callback(hObject, eventdata, handles)
            %mapping between analog inputs and X,Y,Z axes.
    %         Xch = 1;
    %         Ych = 3;
    %         Zch = 2;
            fprintf(out.s,'R');
            %read voltages from accelerometer and reorder
            reordered(1)= fscanf(out.s,'%u');
            reordered(2)= fscanf(out.s,'%u');
            reordered(3)= fscanf(out.s,'%u');
            %determine what offset and gain values to use
            offset = calCo.offset;
            gain = calCo.g;
            accel = (reordered - offset) ./ gain;
            %map analog inputs to axes
            handles.gx = accel(1);
            handles.gy = accel(2);
            handles.gz = accel(3);
            guidata(hObject, handles)

and in the openingfnc

guidata(hObject, handles);
handles.gx= 0;
handles.gy= 0;

Amed 2013-2-1

编辑：Amed 2013-2-1

I'm confused sorry, but what is my current out.s?

edit: I have this in my openingfnc guidata(hObject, handles); handles.out = out.s; handles.gx= 0; handles.gy= 0;

and recieved this error Undefined variable "out" or class "out.s".

Error in BW2>BW2_OpeningFcn (line 61) handles.out = out.s;

Error in gui_mainfcn (line 221) feval(gui_State.gui_OpeningFcn, gui_hFigure, [], guidata(gui_hFigure), varargin{:});

Error in BW2 (line 42) gui_mainfcn(gui_State, varargin{:});

>>

Daniell Algar 2013-2-1

Yes, it's the same problem as my last comment......

If you yourself do not know what out.s is, I cant help you. I guess it's the output from you sensor...

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Answer 1

ASHISHREDDY THUMMALA 2019-4-14

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/60864-accelerometer-data-matlab-gui#answer_370577

You have declared 2 functions in your script, then you should have end for both functions. That means two end's

What accelerometer are you using ?

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