Как отобразить данные из uart на Raspberry PI 4 ⇐ C++

[Гость]

I'm new in the raspbian bios and programming language, I have problem with receiving data from the raspberry pi 4 uart (ttyS0). I have ADC converter of course, which returns me hexadecimal string with data. The Przemytnik class is for connecting c++ language with qml, I would like to add a few classes in the future that's why I'm using the other class to reconvert data to qml. Sorry for my bad English, I'm still learning I'm using QSerialPort library Could you help me with this?
SerialReader.h:

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#ifndef SERIALREADER_H
#define SERIALREADER_H

#include 
#include 

class SerialReader : public QObject
{
Q_OBJECT
Q_PROPERTY(QString data READ data NOTIFY dataChanged)

public:
explicit SerialReader(QObject *parent = nullptr);

QString data() const;
Q_INVOKABLE void readData();
void writeData(const QString &data);

signals:
void dataChanged();

private:
QSerialPort m_serialPort;
QString m_data;
};

#endif // SERIALREADER_H

SerialReader.cpp:

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#include 
#include 

SerialReader::SerialReader(QObject *parent) : QObject(parent) {
m_serialPort.setPortName("/dev/ttyS0");
m_serialPort.setBaudRate(QSerialPort::Baud115200);
m_serialPort.setDataBits(QSerialPort::Data8);
m_serialPort.setParity(QSerialPort::NoParity);
m_serialPort.setStopBits(QSerialPort::OneStop);
m_serialPort.setFlowControl(QSerialPort::NoFlowControl);

if (!m_serialPort.open(QIODevice::ReadOnly)) {
std::cerr readData();
}

SerialReader* Przemytnik::serialReader() const { return m_serialReader; }

void Przemytnik::setSerialReader(SerialReader* serialReader) {
if (serialReader != m_serialReader) {
m_serialReader = serialReader;
emit serialReaderChanged();
}
}

I also used

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qmlRegisteredType

in main.cpp
And my simple main.qml code:

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import QtQuick 2.9
import QtQuick.Window 2.3
import port 1.0

Window {
width: 640
height: 480
visible: true
title: qsTr("Hello World")

Item{
Przemytnik{
id: przemytnik
}
Text {
text: przemytnik.serialReader.data
}
}
}

I tried to change the code, but with no results. I don't know what I can do to fix that. I'm hoping that someone can help me.


Источник: https://stackoverflow.com/questions/781 ... berry-pi-4