Binary data in SerialPort

[Tirupathi Korla]

@yasinn
Are you getting binary value in ASCII format??
i.e., you are getting 10101010 when you read but as ASCII values..

[yasinn]

Yes,
let me explain again, I send 10101010 data from fpga and when I read from Qt for ex;

QByteArray data= serial->readAll();
QString s_data = QString(data);
ui->textEdit->setText(s_data);

I saw ascii characters in text edit. for ex,
that image.

[yasinn]

sorry for adding but;
when I send 00100101 data I saw "%" as ex, or
when I send 00100110 data I saw "& " that symbol.

How can I turn those symbol into binary

[aha_1980]

@yasinn said in Binary data in SerialPort:

sorry for adding but;
when I send 00100101 data I saw "%" as ex, or
when I send 00100110 data I saw "& " that symbol.

How can I turn those symbol into binary

Hello, the data is already binary, but you are interpreting them as ASCII characters (when you append the chars to a text edit).

What do you actually want to do with the data you receive?

[yasinn]

@aha_1980
firstly thanks for your reply, I send distance data in binary and I wanna read as decimal as result.
for ex if I send 00000111 data , I wanna read 7.

you said that " the data is already binary, but you are interpreting them as ASCII characters" , yes I know but how can I convert ıt into decimal ?

[aha_1980]

@yasinn said in Binary data in SerialPort:

@aha_1980
firstly thanks for your reply, I send distance data in binary and I wanna read as decimal as result.
for ex if I send 00000111 data , I wanna read 7.

you said that " the data is already binary, but you are interpreting them as ASCII characters" , yes I know but how can I convert ıt into decimal ?

There's no need to convert, the binary data 00000111 is already 7. The problem you might facing is, that each byte is stored as a char and usally these are used to encode text.

Nevertheless, a char is an int and you can do arithmetics with it and compare it, etc.

[yasinn]

This post is deleted!

[yasinn]

@aha_1980 said in Binary data in SerialPort:

@yasinn said in Binary data in SerialPort:

@aha_1980
firstly thanks for your reply, I send distance data in binary and I wanna read as decimal as result.
for ex if I send 00000111 data , I wanna read 7.

you said that " the data is already binary, but you are interpreting them as ASCII characters" , yes I know but how can I convert ıt into decimal ?

There's no need to convert, the binary data 00000111 is already 7. The problem you might facing is, that each byte is stored as a char and usally these are used to encode text.

Nevertheless, a char is an int and you can do arithmetics with it and compare it, etc.

thaks for advice, but ı dont wanna do arithmatics with data, I just want to saw it as deciamal. I work on a radar project, I cant say "your target is 01010111 meters away from you " :)

Should I compare 255 characters for it ?

[aha_1980]

@yasinn said in Binary data in SerialPort:

thaks for advice, but ı dont wanna do arithmatics with data, I just want to saw it as deciamal. I work on a radar project, I cant say "your target is 01010111 meters away from you " :)

I'm sorry, but it seems you should really learn basic C programming - you will stuck soon again otherwise.

Given, that each byte you receive from the serial port is a distance in meters, you could do something like:

const QByteArray data = serial.readAll();
for (int i = 0; i < data.size(); ++i) {
    QString text = QObject::tr("The target is %1 meters away").arg(int(data.at(i)));
    ui->textEdit->append(text);
}

[VRonin]

    QByteArray data= serial->readAll();
    QString s_data;
    for (char singleByte : data)
        s_data.append(ui->textEdit->locale().toString(ststic_cast<qint16>(singleByte))); //if it's unsigned change qint16 to quint16
    ui->textEdit->setText(s_data);

[yasinn]

@aha_1980 said in Binary data in SerialPort:

@yasinn said in Binary data in SerialPort:

thaks for advice, but ı dont wanna do arithmatics with data, I just want to saw it as deciamal. I work on a radar project, I cant say "your target is 01010111 meters away from you " :)

I'm sorry, but it seems you should really learn basic C programming - you will stuck soon again otherwise.

Given, that each byte you receive from the serial port is a distance in meters, you could do something like:

const QByteArray data = serial.readAll();
for (int i = 0; i < data.size(); ++i) {
    QString text = QObject::tr("The target is %1 meters away").arg(int(data.at(i)));
    ui->textEdit->append(text);
}

Thank u so much. Sorry for my ignorance..

[aha_1980]

@yasinn said in Binary data in SerialPort:

for (int i = 0; i < data.size(); ++i) {
QString text = QObject::tr("The target is %1 meters away").arg(int(data.at(i)));
ui->textEdit->append(text);
}

Thank u so much. Sorry for my ignorance..

Never mind! We all have started at the bottom... Good luck with your project.

[aha_1980]

@yasinn

Thinking about the problem again, casting to uchar seems better so you also get the distances between 128 and 255 meters.

const QByteArray data = serial.readAll();
for (int i = 0; i < data.size(); ++i) {
    QString text = QObject::tr("The target is %1 meters away").arg(uchar(data.at(i)));
    ui->textEdit->append(text);
}