printerclient.cpp


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#include "printerclient.h"

#include <exception>

#include <QDebug>
#include <QFile>
#include <QSerialPort>

PrinterClient::PrinterClient(QObject *parent)
    : QObject { parent }
    , m_serialPort { new QSerialPort { "/dev/ttyUSB0", this } }
{
    if (!m_serialPort->setBaudRate(QSerialPort::Baud115200)) {
        throw std::runtime_error(
            "serial port: cannot set baud rate: " +
            m_serialPort->errorString().toStdString());

        return;
    }

    if (!m_serialPort->open(QFile::ReadWrite)) {
        throw std::runtime_error(
            "cannot open serial port: " +
            m_serialPort->errorString().toStdString());

        return;
    }

    qDebug() << "serial port baud rate:" << m_serialPort->baudRate();

    qDebug() << "serial port data bits:" << m_serialPort->dataBits();
    qDebug() << "serial port parity:" << m_serialPort->parity();
    qDebug() << "serial port stop bits:" << m_serialPort->stopBits();

    QObject::connect(m_serialPort, &QSerialPort::readyRead,
                     this, &PrinterClient::onReadyRead);

    QObject::connect(m_serialPort, &QSerialPort::errorOccurred,
                     this, &PrinterClient::onErrorOccured);

    // m_serialPort->write(QByteArray { "G91\n" });
    // m_serialPort->flush();
    // m_serialPort->write(QByteArray { "G1 Z10\n" });
    // m_serialPort->flush();
    sendCommand("G91");
    // sendCommand("G1 Z10");
    // sendCommand("G1 Z-10");

    onErrorOccured(QSerialPort::SerialPortError::PermissionError);
}

void PrinterClient::sendCommand(const QString command)
{
    const auto written = m_serialPort->write(command.toUtf8() + "\n");

    qDebug() << QString("serialPort: send '%1': (written %2 bytes)")
                    .arg(command).arg(written);

    m_serialPort->flush();
}

void PrinterClient::onReadyRead()
{
    const auto data = m_serialPort->readAll();
    qDebug() << "serialPort: " << data;

    emit newData(data);
}

void PrinterClient::onErrorOccured(QSerialPort::SerialPortError error)
{
    qWarning() << "serial port error:" << m_serialPort->errorString()
               << "-" << error;
}