Unsolved How to write code that enters lines in the Command Arguments Section
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That would take 2 lines of my text file , and insert them one by one there
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I will check but that is my tutor who told me to do something like this..
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@lolilol78
but are u sure he didnt mean that APP should read text file ?
and not Creator ? -
@mrjj
I created a code in exe that reads the text file and sort itbut then how can i do the connection com5 and baudrate 9600 if not typed manually inside the edit tab
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@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. -
@mrjj not sure i understood really well, do you have any example please ?
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@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(); }
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@mrjj ok thanks for your time ,
i will try to test something. -
@lolilol78
hi
i would tryfor (int pcount = 0; pcount < argc; ++pcount) { qDebug() << argv[pcount]; }
with and without parameters in "run"/Creator
else just ask.
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@mrjj thanks for the line but i didnt really understand what that means ? it is gonna print something ?
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@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. -
@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..
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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 QFileQFile 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();
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@mrjj Thank you mrjj
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@lolilol78
so tutor said ok to read from file?
Note that sample read one line at a time -
@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? -
Hi @lolilol78
You are searching for QSerialPort
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@aha_1980 hello aha,
i am really having troubles searching through the site of qt, i am a novice and i cant really manage to code properly every time i try.
after having my text file read and every line read as QString, i want to send each line to Arduino via Serial. how can I do it ?
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No no, it's not working that way - I'm not going to do your homework. I gave you two links and there are several examples.
The minimum you can do now is to have a look at the examples. Hint: this one looks close to your task :)
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@lolilol78
You will use http://doc.qt.io/qt-5/qserialport.html#open to open your serial device for write and something like http://doc.qt.io/qt-5/qserialport.html#writeData or http://doc.qt.io/qt-5/qiodevice.html#write-2 to send the strings down the line.