Snap7 and Qt ,PLC communication

mrjj

@ZekDe
Hi , yes you might be able to include the source files directly in the Qt app unless snap7 is
designed to be a lib. Installing multiple version of mingw will open up for a mess with paths etc.

If directly including them (and fixing the .pro file so it can find its headers) still produces errors, it might not
allow direct use and must be build as DLL.

ZekDe

as a result,What is your offer now?

mrjj

@ZekDe
Offer ?
All info is there. they even made .bat files to compile the DLL
so build it and link it to the Qt app.
It has clear build instruction.

ZekDe

I suppose I have lack of knowledge,I dont know about .bat file.How will I use it?What does it do

mrjj

@ZekDe
First read its build dosc.
You might need to alter paths to where it looks for compiler
Then open a Command prompt and run the bat file for
mingw32 or 64 (depending on what u use)
It should produce a DLL you can link to your app as described.

ZekDe

Check me then if I understand right.
1-->I will build a .dll using .bat according to mingw file path,I will chance in bat file.
2-->I will put in my Qt app .dll, .lib and I include the snap7.lib in .pro file
Then Qt will see both because of the .dll and .lib same folder.

ZekDe

Okay I said wrong as far as I see.
To build Snap7, open a command prompt into the working folder build\windows\MinGW32 and run "make all" (or "make clean" if you want to clean the project).
How can I open a command promt in working folder ,it means a txt file?and then convert .bat.Still I am confused.How can I assembly all.I have Makefile,.bat,.lib..dll.I have new version Mingw this is why I need to change in .bat file.When I click this what will happen,will it produce a makefile? then How will I make out with them all in Qt

mrjj

@ZekDe
Hi
seems fine if 2:
is
INCLUDEPATH += /path/include ( points to where ever Snap7 .h file livrd
LIBS += -L"c:/fullpath/lib" -lCatWhisperer

and "c:/fullpath/lib" is corrected to point to the folder that contains the DLL you just build
and CatWhisperer be replaced with actual filename

mrjj

how can I open a command prompt in working folder

just open one and navigate to the folder using command. :)
like
cd c:\xxx\yyy

You dont convert the BAT file. u run it

It might produce a make file and you can run mingw make on it

ZekDe

path=c:\MinGW32\bin;c:\MinGW32\mingw32\bin;%PATH
mingw32-make %1
this is in .bat
and he said me
It is assumed that MinGW compiler is installed in C:\MinGW32 and its release is 4.7.2.
If not, you need to modify make.bat and makefile.
My mingw like you know in another folder.I will change it in the command line? and How?And I don't stil lunderstand how the makefile will be used in Qt,Am I missing something.And Thank you so much your helps,I learned very important knowledges

mmiacca

Hi... i'm using SNAP7 compiled with mingw inside qtcreator... i can compile and also debug SNAP7 along with my HMI software...
If you can wait until monday i'll send you the complete project so you can have an easy start...

ZekDe

Thank you mmiacca ,I can wait and also How did you manage it if you explain I will be so happy.

ZekDe

Are you able to do it with mingw 5.3.0?

ZekDe

Hi mmiacca ,could you give me an example ?,I need like you ssay,I need easy start

mmiacca

Hi (excuse my english please)

Here is the project file to compile a gui example with snap7, no libraries, all in one..

#-------------------------------------------------
#
# Project created by QtCreator 2016-11-17T17:37:17
#
#-------------------------------------------------

QT += core gui network

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = test1

TEMPLATE = app

# Desde http://stackoverflow.com
# Finally, CONFIG(debug, debug|release) evaluates to true if CONFIG contains "debug" but not "release", or if it contains both
# "debug" and "release" but "release" doesn't appear after the last occurrence of "debug".
CONFIG(debug, debug|release){
 DESTDIR = $$_PRO_FILE_PWD_/../debug
 #DEFINES += QT_NO_DEBUG
}
else{
 DESTDIR = $$_PRO_FILE_PWD_/../release
}

win32:LIBS += C:\Qt\Tools\mingw530_32\i686-w64-mingw32\lib\libws2_32.a
win32:LIBS += C:\Qt\Tools\mingw530_32\i686-w64-mingw32\lib\libwinmm.a

INCLUDEPATH += ../snap7-full-1.4.1/release/Wrappers/c-cpp/ \
               ../snap7-full-1.4.1/src/lib/ \
               ../snap7-full-1.4.1/src/core/ \
               ../snap7-full-1.4.1/src/sys/

SOURCES += main.cpp\
 mainwindow.cpp \
    client.cpp \
    ../snap7-full-1.4.1/release/Wrappers/c-cpp/snap7.cpp \
    ../snap7-full-1.4.1/src/core/s7_client.cpp \
    ../snap7-full-1.4.1/src/core/s7_isotcp.cpp \
    ../snap7-full-1.4.1/src/core/s7_micro_client.cpp \
    ../snap7-full-1.4.1/src/core/s7_partner.cpp \
    ../snap7-full-1.4.1/src/core/s7_peer.cpp \
    ../snap7-full-1.4.1/src/core/s7_server.cpp \
    ../snap7-full-1.4.1/src/core/s7_text.cpp \
    ../snap7-full-1.4.1/src/lib/snap7_libmain.cpp \
    ../snap7-full-1.4.1/src/sys/snap_msgsock.cpp \
    ../snap7-full-1.4.1/src/sys/snap_sysutils.cpp \
    ../snap7-full-1.4.1/src/sys/snap_tcpsrvr.cpp \
    ../snap7-full-1.4.1/src/sys/snap_threads.cpp

HEADERS += mainwindow.h \
    client.h \
    ../snap7-full-1.4.1/release/Wrappers/c-cpp/snap7.h \
    ../snap7-full-1.4.1/src/core/s7_client.h \
    ../snap7-full-1.4.1/src/core/s7_firmware.h \
    ../snap7-full-1.4.1/src/core/s7_isotcp.h \
    ../snap7-full-1.4.1/src/core/s7_micro_client.h \
    ../snap7-full-1.4.1/src/core/s7_partner.h \
    ../snap7-full-1.4.1/src/core/s7_peer.h \
    ../snap7-full-1.4.1/src/core/s7_server.h \
    ../snap7-full-1.4.1/src/core/s7_text.h \
    ../snap7-full-1.4.1/src/core/s7_types.h \
    ../snap7-full-1.4.1/src/lib/snap7_libmain.h \
    ../snap7-full-1.4.1/src/sys/snap_msgsock.h \
    ../snap7-full-1.4.1/src/sys/snap_platform.h \
    ../snap7-full-1.4.1/src/sys/snap_sysutils.h \
    ../snap7-full-1.4.1/src/sys/snap_tcpsrvr.h \
    ../snap7-full-1.4.1/src/sys/snap_threads.h \
    ../snap7-full-1.4.1/src/sys/sol_threads.h \
    ../snap7-full-1.4.1/src/sys/unix_threads.h \
    ../snap7-full-1.4.1/src/sys/win_threads.h

FORMS += mainwindow.ui

But the full project is here https://drive.google.com/file/d/1AWX3xe00D-WWrQwFGi18juR8KBkYkB7V/view?usp=sharing ... also the snap7 project... i'm using qt 5.9.2 with mingw... install it with default options...

Hope this help

ZekDe

This post is deleted!

Daminos

Hi,

I'am intersting of this to integrate Snap7 with QtCreator,
I test your example "test1", it's compiled, but when run the "test.exe" : there is nothing !!
Have you an idea please ?
thank you in advanced

mmiacca

@Daminos Nothing means? the windos has only two widget that show variables from plc, put a breakpoint in the following function...

void MainWindow::scan()
{
//ui->log->setText(logMessage);

union U
{
    unsigned char x[4];
    float f;
} u;

int err = Client->DBRead(380, 160, 4, u.x);
unsigned char aux;

aux = u.x[0];
u.x[0] = u.x[3];
u.x[3] = aux;

aux = u.x[1];
u.x[1] = u.x[2];
u.x[2] = aux;

if(!err)
{
    ui->value_0->setValue(u.f);
    ui->value_1->setValue(u.f);

    ui->value_0->setStyleSheet("");
    ui->value_1->setStyleSheet("");
}
else
{
    ui->value_0->setValue(0);
    ui->value_1->setValue(0);

    ui->value_0->setStyleSheet("background-color: rgb(255, 0, 0);");
    ui->value_1->setStyleSheet("background-color: rgb(255, 0, 0);");

    // Connection
    int error = CliConnect();
    if(!error)
    {

    };

}

char valor;
err = Client->DBRead(380, 151, 1, &valor);
ui->checkBox->setChecked(valor & 0x01);

}

Daminos

@mmiacca
Thanks a lot, it's worked now :D
I have another question please : are you tested this example with Logo_8 ?
Best regards,

mmiacca

@Daminos good.... i do not test this with logo, only S7-400... do you change the cpu TCP/IP address and slot in the logo and in the code?