How to write code that enters lines in the Command Arguments Section

[lolilol78]

Hello everybody,

I want my code to be able to make a connection with Arduino simply by running it.

com : Com5 and baud : 9600

It is in a text file as first lines

I would like to know if there is a code that can actually take those lines and put them inside "command line arguments" in the Run section?

Thanks for your help guys

[mrjj]

Hi
Do you mean something in creator that would take a text file and put first line here

I have never seen that.
Also normally the app itself could read the text file for default
parameters.

[lolilol78]

@mrjj Hello :)

Exactly this !

Dont know if this is possible..

[mrjj]

@lolilol78
hi
Not really. its stored in the project.pro.user file so while its possible to
change it from outside, but Creator will ignore it if already open.

Why dont u just make app use those as default ?
so if no parameters use, the defaults.
or make it read the text file.

Im not sure i understand why u simply cant just put in Creator directly then ?

[lolilol78]

That would take 2 lines of my text file , and insert them one by one there

[lolilol78]

@mrjj

I will check but that is my tutor who told me to do something like this..

[mrjj]

@lolilol78
but are u sure he didnt mean that APP should read text file ?
and not Creator ?

[lolilol78]

@mrjj
I created a code in exe that reads the text file and sort it

but then how can i do the connection com5 and baudrate 9600 if not typed manually inside the edit tab

[mrjj]

@lolilol78
hi
well
int main(int argc, char *argv[])
argc is tells the number of parameters to exe
so u can check that if any is given.

[lolilol78]

@mrjj not sure i understood really well, do you have any example please ?

[mrjj]

@lolilol78
hi
there is not much to it.
int argc tells the number of arguments.
often there is one. which is the path to exe.
so if argc is > 1 then there is (extra) parameters which are in the list
argv
argv is a char * array.

#include <QDebug>
int main(int argc, char* argv[]) {
  qDebug() << argv[0];
  if (argc == 1 ) {
    qDebug() << "no params given";
  }

  QApplication a(argc, argv);
  MainWindow w;
  w.show();

  return a.exec();
}

[lolilol78]

@mrjj ok thanks for your time ,
i will try to test something.

[mrjj]

@lolilol78
hi
i would try

  for (int pcount = 0; pcount < argc; ++pcount) {
    qDebug() <<  argv[pcount];
  }

with and without parameters in "run"/Creator

else just ask.

[lolilol78]

@mrjj thanks for the line but i didnt really understand what that means ? it is gonna print something ?

[mrjj]

@lolilol78
yes, it will show all parameters u give in creator / on command line when run
it was just for u to get a feeling on how it works.

[lolilol78]

@mrjj oh okay i understand thank you,

but actually the parameters are stock in my text file and i need some code to go get them parameters and make the serial connection between the console and the arduino.

then i dont know if it is possible..

[mrjj]

@lolilol78

well if if app sees that it got no parameter it could open the text file if u place it next to exe
yes it very possible.
You can use QFile

QFile file("comm.txt");
if(!file.open(QIODevice::ReadOnly)) {
    QMessageBox::information(0, "error", file.errorString());
}

QTextStream in(&file);

while(!in.atEnd()) {
    QString line = in.readLine();    // read first line
   qDebug() << line; // here u should set com port/ baud instead.
}

file.close();

[lolilol78]

@mrjj Thank you mrjj

[mrjj]

@lolilol78
so tutor said ok to read from file?
Note that sample read one line at a time

[lolilol78]

@mrjj yes the fils has already been read with another function, but now :
how to actually send those lines one by one to Arduino via Serial Com?