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From: Hugo Serrat on 24 Feb 2010 05:45
Hello,

I 'am triyng to build a link between my simulink model or just a m file and my c++ applicaton but i 'am having an issue. I don't really understand how matlab receive the data. and for simulink in which form should i send the data to the block ? I would like to send coordinates like xyz to matlab and with matlab scatter3 the stream of coordinates in real time. is it possible ?

here is the c++ extract code : (sorry comments are in french)
/* Démarrage du listage (mode server) */
sock_err = listen(sock, 5);
printf("Listage du port %d...\n", PORT);

/* Si la socket fonctionne */
if(sock_err != SOCKET_ERROR)
{
/* Attente pendant laquelle le client se connecte */
printf("Patientez pendant que le client se connecte sur le port %d...\n", PORT);

csock = accept(sock, (SOCKADDR*)&csin, &recsize);
printf("Un client se connecte avec la socket %d de %s:%d\n", csock, inet_ntoa(csin.sin_addr), htons(csin.sin_port));
// double buff = 25;

mxArray *datasend;
datasend = mxCreateDoubleMatrix(1, 1, mxREAL);
mlfPrintmatrix(datasend);

sock_err = send(csock, T, 3*sizeof(double), 0);

if(sock_err != SOCKET_ERROR)
printf("Send : %s\n", buffer[0]);
//printf("send : [10 20 30]");
else
printf("Erreur de transmission\n");

/* Il ne faut pas oublier de fermer la connexion (fermée dans les deux sens) */
shutdown(csock, 2);
}

Simulink errors:
Error evaluating registered method 'Outputs' of M-S-Function 'stcpiprb' in 'trajectory2/TCP//IP Receive'. The specified amount of data was not returned within the Timeout period.
Please ensure that data is being sent to the specified port or specify a greater timeout value.

The specified amount of data was not returned within the Timeout period.
Please ensure that data is being sent to the specified port or specify a greater timeout value.

simulink model :
Model {
Name "trajectory2"
Version 7.4
MdlSubVersion 0
GraphicalInterface {
NumRootInports 0
NumRootOutports 0
ParameterArgumentNames ""
ComputedModelVersion "1.3"
NumModelReferences 0
NumTestPointedSignals 0
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SavedCharacterEncoding "UTF-8"
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ScopeRefreshTime 0.035000
OverrideScopeRefreshTime on
DisableAllScopes off
DataTypeOverride "UseLocalSettings"
MinMaxOverflowLogging "UseLocalSettings"
MinMaxOverflowArchiveMode "Overwrite"
MaxMDLFileLineLength 120
Created "Tue Feb 23 11:53:02 2010"
Creator "root"
UpdateHistory "UpdateHistoryNever"
ModifiedByFormat "%<Auto>"
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ModifiedDateFormat "%<Auto>"
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RTWModifiedTimeStamp 188862533
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LinearizationMsg "none"
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AlgebraicLoopMsg "warning"
ArtificialAlgebraicLoopMsg "warning"
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CheckExecutionContextPreStartOutputMsg off
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SignalResolutionControl "UseLocalSettings"
BlockPriorityViolationMsg "warning"
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hdlcoderui.hdlcc {
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LatchByCopyingInsideSignal off
Interpolate on
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Block {
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DataTypeOverride "UseLocalSettings"
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Block {
BlockType Terminator
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System {
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Location [715, 251, 1295, 511]
Open on
ModelBrowserVisibility off
ModelBrowserWidth 200
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SIDPrevWatermark 11
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}
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# Finite State Machines
#
# Stateflow Version 7.1 (R2009a) dated Jul 17 2009, 00:35:51
#
#


Stateflow {
machine {
id 1
name "trajectory2"
created "23-Feb-2010 11:53:03"
isLibrary 0
firstTarget 8
sfVersion 71014000.00001
}
chart {
id 2
name "Embedded\nMATLAB Function"
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viewLimits [0 156.75 0 153.75]
screen [1 1 1440 900 1.25]
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machine 1
toolbarMode LIBRARY_TOOLBAR
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editorLayout "100 M4x1[205 142 1080 733]"
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junction {
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position [23.5747 49.5747 7]
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type CONNECTIVE_JUNCTION
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midPoint [23.5747 24.9468]
chart 2
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dataLimits [23.575 23.575 14.625 34.575]
subviewer 2
drawStyle SMART
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ssIdNumber 2
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data {
id 6
ssIdNumber 4
name "data"
linkNode [2 0 0]
scope INPUT_DATA
machine 1
props {
array {
size "-1"
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type {
method SF_INHERITED_TYPE
primitive SF_DOUBLE_TYPE
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complexity SF_COMPLEX_INHERITED
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dataType "Inherit: Same as Simulink"
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instance {
id 7
name "Embedded\nMATLAB Function"
machine 1
chart 2
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target {
id 8
name "sfun"
description "Default Simulink S-Function Target."
machine 1
linkNode [1 0 0]
}
}

sincerely,
Hugo
 | 
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