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|
/*=============================================================================|
| PROJECT SNAP7 1.4.0 |
|==============================================================================|
| Copyright (C) 2013, 2014 Davide Nardella |
| All rights reserved. |
|==============================================================================|
| SNAP7 is free software: you can redistribute it and/or modify |
| it under the terms of the Lesser GNU General Public License as published by |
| the Free Software Foundation, either version 3 of the License, or |
| (at your option) any later version. |
| |
| It means that you can distribute your commercial software linked with |
| SNAP7 without the requirement to distribute the source code of your |
| application and without the requirement that your application be itself |
| distributed under LGPL. |
| |
| SNAP7 is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| Lesser GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License and a |
| copy of Lesser GNU General Public License along with Snap7. |
| If not, see http://www.gnu.org/licenses/ |
|==============================================================================|
| |
| New Server Example (1.1.0) |
| Here we set ReadEventCallback to get in advance which area the client needs |
| then we fill this area with a counter. |
| The purpose is to show how to modify an area before it be trasferred to the |
| client |
| |
|=============================================================================*/
#include <stdio.h>
#include <stdlib.h>
#include <cstring>
#include "snap7.h"
TS7Server *Server;
unsigned char DB21[512]; // Our DB1
unsigned char DB103[1280]; // Our DB2
unsigned char DB3[1024]; // Our DB3
byte cnt = 0;
// Here we use the callback to show the log, this is not the best choice since
// the callback is synchronous with the client access, i.e. the server cannot
// handle futher request from that client until the callback is complete.
// The right choice is to use the log queue via the method PickEvent.
void S7API EventCallBack(void *usrPtr, PSrvEvent PEvent, int Size)
{
// print the event
printf("%s\n",SrvEventText(PEvent).c_str());
};
// The read event callback is called multiple times in presence of multiread var request
void S7API ReadEventCallBack(void *usrPtr, PSrvEvent PEvent, int Size)
{
// print the read event
printf("%s\n",SrvEventText(PEvent).c_str());
if (PEvent->EvtParam1==S7AreaDB)
{
// As example the DB requested is filled before transferred
// EvtParam1 contains the DB number.
switch (PEvent->EvtParam2)
{
case 1 : memset(&DB21, ++cnt, sizeof(DB21));break;
case 2 : memset(&DB103, ++cnt, sizeof(DB103));break;
case 3 : memset(&DB3, ++cnt, sizeof(DB3));break;
}
}
};
int main(int argc, char* argv[])
{
int Error;
Server = new TS7Server;
// Share some resources with our virtual PLC
Server->RegisterArea(srvAreaDB, // We are registering a DB
21, // Its number is 1 (DB1)
&DB21, // Our buffer for DB1
sizeof(DB21)); // Its size
// Do the same for DB2 and DB3
Server->RegisterArea(srvAreaDB, 103, &DB103, sizeof(DB103));
Server->RegisterArea(srvAreaDB, 3, &DB3, sizeof(DB3));
// We mask the read event to avoid the double trigger for the same event
Server->SetEventsMask(~evcDataRead);
Server->SetEventsCallback(EventCallBack, NULL);
// Set the Read Callback
Server->SetReadEventsCallback(ReadEventCallBack, NULL);
// Start the server onto the default adapter.
// To select an adapter we have to use Server->StartTo("192.168.x.y").
// Start() is the same of StartTo("0.0.0.0");
Error=Server->Start();
if (Error==0)
{
// Now the server is running ... wait a key to terminate
getchar();
}
else
printf("%s\n",SrvErrorText(Error).c_str());
// If you got a start error:
// Windows - most likely you ar running the server in a pc on wich is
// installed step 7 : open a command prompt and type
// "net stop s7oiehsx" (Win32) or
// "net stop s7oiehsx64" (Win64)
// And after this test :
// "net start s7oiehsx" (Win32) or
// "net start s7oiehsx64" (Win64)
// Unix - you need root rights :-( because the isotcp port (102) is
// low and so it's considered "privileged".
Server->Stop(); // <- not strictly needed, every server is stopped on deletion
// and every client is gracefully disconnected.
delete Server;
}
// Finally, this is a very minimalist (but working) server :
/*
int main(int argc, char* argv[])
{
TS7Server *Server = new TS7Server;
Server->Start();
getchar();
delete Server;
}
*/
|
