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xPC File Scope Tools

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xPC File Scope Tools


Robyn Jackey (view profile)


26 Jul 2007 (Updated )

Functions to easily save xPC File Scope data to the target PC as MAT files.

function getxpcFileData(ModelName,OutFilePath,Description)
% getxpcFileData - Retrieve file scope data from target PC
% -------------------------------------------------------------------------
% Abstract: This function retrieves the data from xPC file scopes.  It
% searches the specified model for any xPC Target scopes of type 'file' and
% looks for the target filename specified in each of these scopes.  It
% collects the data on the target PC file system, and saves it on the host
% PC in a .mat file format.  In the .mat file, each target scope will be
% stored in a structure called 'xpcdataN', where N is the scope number.
% Each signal is stored as a field of the structure by its signal name, for
% example 'xpcdata1.signal_name_1'.
% Syntax:
%       getxpcFileData;
%       getxpcFileData('ModelName');
%       getxpcFileData('ModelName','OutFilePath','Description');
% Inputs:
%           ModelName - name of the Simulink model
%           OutFilePath - output file path
%           Description - description of this data set
% Outputs:
%           none
% Examples:
%       getxpcFileData('test_model');
%       load DataFileName.mat % to load the mat file (or click the link)
%       xpcdata1  %to show what is in the structure for this scope
%       f = fields(xpcdata1) %to return the field names in this structure
%       xpcdata1.signal_name %to return the raw data of a signal
%       plot(xpcdata1.time,xpcdata1.signal_name) %to plot a signal
% Notes:
%   - You can optionally specify the output file path and description at
%     the command line.  If you do not, a dialog will ask for this info.
%   - Vector signals are not fully supported. If an xPC scope is recording
%     a vector signal, the names and data retrieved will not match correctly.
%   - Signal names will be modified to ensure they are valid MATLAB variable
%     names.
%   - This function assumes you are using the object named 'tg' for the
%     target PC object, and that it exists in the base workspace.  If it
%     does not exist, this function will attempt to search the file system
%     on the default target PC that your host PC is configured to use.

% Copyright 2007 - 2009 The MathWorks, Inc.
% Auth/Revision:
%   The MathWorks Consulting Group
%   $Author: rjackey $
%   $Revision: 10 $  $Date: 2007-07-26 15:56:29 -0400 (Thu, 26 Jul 2007) $
% -------------------------------------------------------------------------

% Check input arguments
if nargin < 1
    ModelName = bdroot;
elseif nargin == 1

    % Prompt the user for the output file name and description

    % Default save file name
    DefaultName = ['xPC_Data_' datestr(now, 'yyyymmdd_HHMMSS') '.mat'];

    % Bring up a dialog asking where to save the file
    [OutFileName,OutPath] = uiputfile('*.mat','Save Target File Scope Data to Host',DefaultName);

    % If the user cancelled, just return
    if isequal(OutFileName,0)

    % Put together the full path to the output file
    OutFilePath = fullfile(OutPath,OutFileName);

    % Bring up a dialog to get the description
    Answer = inputdlg('Enter a description for all xPC file scope data:',...
    if isempty(Answer)
        Description = '';
        Description = Answer{1};

elseif nargin == 3
    % Clean up the filename and path info
    [OutPath,OutFileName,OutFileExt] = fileparts(OutFilePath);
    if isempty(OutPath)
        OutPath = pwd;
        OutFilePath = fullfile(OutPath,[OutFileName OutFileExt]);
    error('Improper input arguments');

%% Get info on all file scopes in the model

% Get handles to all xPC file scope blocks
hFileScopes = find_system(ModelName,'LookUnderMasks','all',...

% Get the file name that each scope writes to
ScopeFileNames = get_param(hFileScopes,'filename');

% Get the scope numbers
ScopeNumbers = get_param(hFileScopes,'scopeno');

% Make a list of variable names (e.g. 'xpcdata1','xpcdata4', where '1','4'
% correspond to the xPC scope numbers
VarNames = strcat({'xpcdata'},ScopeNumbers);

%% Read the data files from the target PC

% Get the name of the xPC target object from RTW options
% get_param(ModelName,'RTWOptions')
% -aRL32ObjectName="tg"

% Start a waitbar, in case the files are large
hWaitbar = waitbar(0,'Opening xPC Target File System');

% Get the xPC Target object from the base workspace
    tg = evalin('base','tg');

    % Get a target file system object
    filesys = tg.fs;

    % Make sure the file system is available
    if isempty(filesys)
        error('Unable to access target PC file system.')

    tg = xpctarget.xpc;

    % Get a target file system object
    filesys = tg.fs;

    % Make sure the file system is available
    if isempty(filesys)
        error('Unable to access target PC file system.')


% Loop through each data file
NumScopes = length(ScopeFileNames);
for i=1:NumScopes

    % Update the waitbar
    waitbar(i/NumScopes,hWaitbar,['Reading Target File ' int2str(i) '/' int2str(NumScopes)]);

    % Open the file for reading
    fid = filesys.fopen(ScopeFileNames{i});

    % If the file could not be opened, warn and skip to the next iteration
    if isequal(fid,-1)

            ['Unable to open target file ''' ScopeFileNames{i} '''.']);

        RawData = [];


        % Read the binary contents of the file
        BinaryData = filesys.fread(fid);

        % Close the file

        % Convert to MATLAB format
        MLData = readxpcfile(BinaryData);
        RawData =;


    % Change this format into a customized structure array

    % Make sure that 'ShowPropagatedSignals' is on for the SrcPort
        hPorts = get_param(hFileScopes{i},'PortHandles');
        hLine = get_param(hPorts.Inport,'Line');
        hSrcPort = get_param(hLine,'SrcPortHandle');

    % Get the input signal names for this file scope
    SigNamesStr = get_param(hFileScopes{i},'InputSignalNames');
    if ~isempty(SigNamesStr{1})
        SigNamesCell = textscan(SigNamesStr{1},'%s','whitespace',' \b\t<>','delimiter',',');
        SigNamesCell = strrep(SigNamesCell{1},'>','');

    % Initialize an empty struct into a temp variable
    % It initially has one field called 'time'
    xpcdata_temp = struct('time',[],'description',Description,'signals',{[]},...

    % Make sure that RawData is not empty
    if ~isempty(RawData)

        % Save the time vector
        xpcdata_temp.time = RawData(:,end);

        % Save the datestamp
        FileInfo = filesys.dir(ScopeFileNames{i});
        xpcdata_temp.datestamp = [ ' ' FileInfo.time];

        % Loop through each signal (each column of data, except the last)
        for j=1:(size(RawData,2)-1)

            % Get the signal name of this data
                % Get this signal name
                SigName = SigNamesCell{j};

                % Replace '%' with 'Pct'
                SigName = regexprep(SigName,'%','Pct');

                % Remove any non alpha/numeric/underscores from the signal name
                SigName = regexprep(SigName,'\W+','_');

                % Remove any underscores from the beginning or end
                SigName = regexprep(SigName,'(^_+)|(_+)$','');

                % Generate a valid variable name from the signal name,
                % excluding variable names that have already been used
                SigName = genvarname(SigName,fields(xpcdata_temp));
                SigName = ['noname' int2str(j)];

            % Save data column for this signal
            xpcdata_temp.(SigName) = RawData(:,j);

            % Save the signal name
            xpcdata_temp.signals{j} = SigName;



    % Put the temporary structure into the assigned variable name
    eval([VarNames{i} '=xpcdata_temp;']);


% Update the waitbar
waitbar(1,hWaitbar,['Saving Output ' OutFileName]);

%% Save the data to the host PC, and clean up

% Save the .mat file

% Close Waitbar

% Display a success message to the user
cr = sprintf('\n');
disp(['Successfully saved target file scope data to ''' OutFilePath '''. ' cr...
    'Click <a href="matlab: load(''' OutFilePath...
    ''');">here</a> to load this file into the MATLAB workspace.']);

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