Interactive.src.CServer

Communication functions

Information

CServer package

CServer package package includes Modelica functions encapsulating external C-functions.
The goal of these external C-functions is to communicate the simulation of the model and the graphic user interface (C++ program automatically generated during the initialization process).
The communication is based on a client-server architecture. The C++ view and the simulation of the model are the client and the server respectively. The communication is performed using TCP sockets. The external C-functions perform the following communication tasks:

Establishment of the Tcp connection of the server (executable file generated by the Modelica environment) with the client (C++ program automatically generated during the model initialization process). The server waits until the predifined number of clients asks for a connection to its server port. The server accepts all these connections.
Reception and processing of the data sent by the client through the Tcp connection.
Sending of data to each client through the Tcp connection.
Closure of the Tcp connection.

Package Content

Name	Description
startCserver	Start the C server
shutdownConnection	Shutdown connection
getVarValues	Function that gets information from the view
sendOutput	Function that sends information to the view
startNClientCserver	Start the server for nClients
sendChalk	The client receives the chalk that allows to perform changes

Interactive.src.CServer.startCserver

Start the C server

Inputs

Name	Description
nPort	Port number

Outputs

Name	Description
fd	Socket descriptor

Interactive.src.CServer.shutdownConnection

Shutdown connection

Inputs

Name	Description
fd	Socket descriptor

Outputs

Name	Description
sdStatus	Status of the connection

Interactive.src.CServer.getVarValues

Function that gets information from the view

Inputs

Name	Description
fd	Socket descriptor
lenCKI	Lenght of the arrays CK/I

Outputs

Name	Description
out
CK[lenCKI]	CK[i]=1 implies that the variable associated to the interactive control identified by the number i has changed its value
I[lenCKI]	Vector with the new values of the interactive variables modified due to a user action

Interactive.src.CServer.sendOutput

Function that sends information to the view

Inputs

Name	Description
fd	Socket descriptor
len	Length of array O
O[len]	Array containing the value of the interactive graphic properties sent to the view
intLen	Length of the array intO
intO[intLen]	Array containing the value of the interactive colors sent to the view
num	Number that identifies the component sending the values

Outputs

Name	Description
out	=1 if the main window of the view has been closed

Interactive.src.CServer.startNClientCserver

Start the server for nClients

Inputs

Name	Description
nPort	Port number
nClients	Number of clients to be connected
launchView	0/1 not/yes launch the view

Outputs

Name	Description
nC	Number of clients actually connected
fd[nClients]	Socket descriptor

Interactive.src.CServer.sendChalk

The client receives the chalk that allows to perform changes

Inputs

Name	Description
fd	Socket descriptor
chalk	Deliver or not (1/0) then chalk

Outputs

Name	Description
out	=1 if the main window of the view has been closed

Automatically generated Thu Apr 28 12:24:24 2022.