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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "mainwindow.h"
#include "settingsdialog.h"
#include "ui_mainwindow.h"
#if QT_CONFIG(modbus_serialport)
# include <QModbusRtuSerialServer>
# include <QSerialPortInfo>
#endif
#include <QModbusTcpServer>
#include <QRegularExpression>
#include <QRegularExpressionValidator>
#include <QStatusBar>
#include <QUrl>
enum ModbusConnection {
Serial,
Tcp
};
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
setupWidgetContainers();
ui->portEdit->setToolTip(tr("For serial connection enter COM port name\n"
"(eg. COM1, ttyS0, etc).\n"
"For TCP connection enter\n<ip address>:<port> pair."));
#if QT_CONFIG(modbus_serialport)
ui->connectType->setCurrentIndex(0);
onCurrentConnectTypeChanged(0);
#else
// lock out the serial port option
ui->connectType->setCurrentIndex(1);
onCurrentConnectTypeChanged(1);
ui->connectType->setEnabled(false);
#endif
m_settingsDialog = new SettingsDialog(this);
initActions();
}
MainWindow::~MainWindow()
{
if (modbusDevice)
modbusDevice->disconnectDevice();
delete modbusDevice;
delete ui;
}
void MainWindow::initActions()
{
ui->actionConnect->setEnabled(true);
ui->actionDisconnect->setEnabled(false);
ui->actionExit->setEnabled(true);
ui->actionOptions->setEnabled(true);
connect(ui->connectButton, &QPushButton::clicked,
this, &MainWindow::onConnectButtonClicked);
connect(ui->actionConnect, &QAction::triggered,
this, &MainWindow::onConnectButtonClicked);
connect(ui->actionDisconnect, &QAction::triggered,
this, &MainWindow::onConnectButtonClicked);
connect(ui->connectType, &QComboBox::currentIndexChanged,
this, &MainWindow::onCurrentConnectTypeChanged);
connect(ui->actionExit, &QAction::triggered, this, &QMainWindow::close);
connect(ui->actionOptions, &QAction::triggered, m_settingsDialog, &QDialog::show);
}
void MainWindow::onCurrentConnectTypeChanged(int index)
{
if (modbusDevice) {
modbusDevice->disconnect();
delete modbusDevice;
modbusDevice = nullptr;
}
//! [create_server_0]
auto type = static_cast<ModbusConnection>(index);
if (type == Serial) {
#if QT_CONFIG(modbus_serialport)
modbusDevice = new QModbusRtuSerialServer(this);
// Try to fill in the first available serial port name if the line edit
// is empty, or contains a url (assume that ':' is only a part of url).
const auto ports = QSerialPortInfo::availablePorts();
const auto currentText = ui->portEdit->text();
if (!ports.isEmpty() && (currentText.isEmpty() || currentText.contains(u':')))
ui->portEdit->setText(ports.front().portName());
#endif
} else if (type == Tcp) {
modbusDevice = new QModbusTcpServer(this);
const QUrl currentUrl = QUrl::fromUserInput(ui->portEdit->text());
// Check if we already have <ip address>:<port>
if (currentUrl.port() <= 0)
ui->portEdit->setText(QLatin1String("127.0.0.1:50200"));
}
//! [create_server_0]
ui->listenOnlyBox->setEnabled(type == Serial);
if (!modbusDevice) {
ui->connectButton->setDisabled(true);
statusBar()->showMessage(tr("Could not create Modbus server."), 5000);
} else {
//! [create_server_1]
QModbusDataUnitMap reg;
reg.insert(QModbusDataUnit::Coils, { QModbusDataUnit::Coils, 0, 10 });
reg.insert(QModbusDataUnit::DiscreteInputs, { QModbusDataUnit::DiscreteInputs, 0, 10 });
reg.insert(QModbusDataUnit::InputRegisters, { QModbusDataUnit::InputRegisters, 0, 10 });
reg.insert(QModbusDataUnit::HoldingRegisters, { QModbusDataUnit::HoldingRegisters, 0, 10 });
modbusDevice->setMap(reg);
//! [create_server_1]
//! [connect_data_written]
connect(modbusDevice, &QModbusServer::dataWritten,
this, &MainWindow::updateWidgets);
//! [connect_data_written]
connect(modbusDevice, &QModbusServer::stateChanged,
this, &MainWindow::onStateChanged);
connect(modbusDevice, &QModbusServer::errorOccurred,
this, &MainWindow::handleDeviceError);
connect(ui->listenOnlyBox, &QCheckBox::toggled, this, [this](bool toggled) {
if (modbusDevice)
modbusDevice->setValue(QModbusServer::ListenOnlyMode, toggled);
});
emit ui->listenOnlyBox->toggled(ui->listenOnlyBox->isChecked());
connect(ui->setBusyBox, &QCheckBox::toggled, this, [this](bool toggled) {
if (modbusDevice)
modbusDevice->setValue(QModbusServer::DeviceBusy, toggled ? 0xffff : 0x0000);
});
emit ui->setBusyBox->toggled(ui->setBusyBox->isChecked());
setupDeviceData();
}
}
void MainWindow::handleDeviceError(QModbusDevice::Error newError)
{
if (newError == QModbusDevice::NoError || !modbusDevice)
return;
statusBar()->showMessage(modbusDevice->errorString(), 5000);
}
void MainWindow::onConnectButtonClicked()
{
bool intendToConnect = (modbusDevice->state() == QModbusDevice::UnconnectedState);
statusBar()->clearMessage();
if (intendToConnect) {
//! [create_server_2]
if (static_cast<ModbusConnection>(ui->connectType->currentIndex()) == Serial) {
modbusDevice->setConnectionParameter(QModbusDevice::SerialPortNameParameter,
ui->portEdit->text());
#if QT_CONFIG(modbus_serialport)
modbusDevice->setConnectionParameter(QModbusDevice::SerialParityParameter,
m_settingsDialog->settings().parity);
modbusDevice->setConnectionParameter(QModbusDevice::SerialBaudRateParameter,
m_settingsDialog->settings().baud);
modbusDevice->setConnectionParameter(QModbusDevice::SerialDataBitsParameter,
m_settingsDialog->settings().dataBits);
modbusDevice->setConnectionParameter(QModbusDevice::SerialStopBitsParameter,
m_settingsDialog->settings().stopBits);
#endif
} else {
const QUrl url = QUrl::fromUserInput(ui->portEdit->text());
modbusDevice->setConnectionParameter(QModbusDevice::NetworkPortParameter, url.port());
modbusDevice->setConnectionParameter(QModbusDevice::NetworkAddressParameter, url.host());
}
modbusDevice->setServerAddress(ui->serverEdit->text().toInt());
//! [create_server_2]
if (!modbusDevice->connectDevice()) {
statusBar()->showMessage(tr("Connect failed: ") + modbusDevice->errorString(), 5000);
} else {
ui->actionConnect->setEnabled(false);
ui->actionDisconnect->setEnabled(true);
}
} else {
modbusDevice->disconnectDevice();
ui->actionConnect->setEnabled(true);
ui->actionDisconnect->setEnabled(false);
}
}
void MainWindow::onStateChanged(int state)
{
bool connected = (state != QModbusDevice::UnconnectedState);
ui->actionConnect->setEnabled(!connected);
ui->actionDisconnect->setEnabled(connected);
if (state == QModbusDevice::UnconnectedState)
ui->connectButton->setText(tr("Connect"));
else if (state == QModbusDevice::ConnectedState)
ui->connectButton->setText(tr("Disconnect"));
ui->connectType->setEnabled(!connected);
ui->portEdit->setEnabled(!connected);
ui->serverEdit->setEnabled(!connected);
}
void MainWindow::coilChanged(int id)
{
QAbstractButton *button = coilButtons.button(id);
bitChanged(id, QModbusDataUnit::Coils, button->isChecked());
}
void MainWindow::discreteInputChanged(int id)
{
QAbstractButton *button = discreteButtons.button(id);
bitChanged(id, QModbusDataUnit::DiscreteInputs, button->isChecked());
}
//! [update_data_locally]
void MainWindow::bitChanged(int id, QModbusDataUnit::RegisterType table, bool value)
{
if (!modbusDevice)
return;
if (!modbusDevice->setData(table, quint16(id), value))
statusBar()->showMessage(tr("Could not set data: ") + modbusDevice->errorString(), 5000);
}
void MainWindow::setRegister(const QString &value)
{
if (!modbusDevice)
return;
const QString objectName = QObject::sender()->objectName();
if (registers.contains(objectName)) {
bool ok = true;
const quint16 id = quint16(QObject::sender()->property("ID").toUInt());
if (objectName.startsWith(QStringLiteral("inReg"))) {
const auto uval = value.toUShort(&ok, 16);
if (ok)
ok = modbusDevice->setData(QModbusDataUnit::InputRegisters, id, uval);
} else if (objectName.startsWith(QStringLiteral("holdReg"))) {
const auto uval = value.toUShort(&ok, 16);
if (ok)
ok = modbusDevice->setData(QModbusDataUnit::HoldingRegisters, id, uval);
}
if (!ok)
statusBar()->showMessage(tr("Could not set register: ") + modbusDevice->errorString(),
5000);
}
}
//! [update_data_locally]
//! [update_data_from_remote]
void MainWindow::updateWidgets(QModbusDataUnit::RegisterType table, int address, int size)
{
for (int i = 0; i < size; ++i) {
quint16 value;
QString text;
switch (table) {
case QModbusDataUnit::Coils:
modbusDevice->data(QModbusDataUnit::Coils, quint16(address + i), &value);
coilButtons.button(address + i)->setChecked(value);
break;
case QModbusDataUnit::HoldingRegisters:
modbusDevice->data(QModbusDataUnit::HoldingRegisters, quint16(address + i), &value);
registers.value(QStringLiteral("holdReg_%1").arg(address + i))->setText(text
.setNum(value, 16));
break;
default:
break;
}
}
}
//! [update_data_from_remote]
// -- private
void MainWindow::setupDeviceData()
{
if (!modbusDevice)
return;
for (quint16 i = 0; i < coilButtons.buttons().count(); ++i)
modbusDevice->setData(QModbusDataUnit::Coils, i, coilButtons.button(i)->isChecked());
for (quint16 i = 0; i < discreteButtons.buttons().count(); ++i) {
modbusDevice->setData(QModbusDataUnit::DiscreteInputs, i,
discreteButtons.button(i)->isChecked());
}
bool ok;
for (QLineEdit *widget : std::as_const(registers)) {
if (widget->objectName().startsWith(QStringLiteral("inReg"))) {
modbusDevice->setData(QModbusDataUnit::InputRegisters, quint16(widget->property("ID").toUInt()),
widget->text().toUShort(&ok, 16));
} else if (widget->objectName().startsWith(QStringLiteral("holdReg"))) {
modbusDevice->setData(QModbusDataUnit::HoldingRegisters, quint16(widget->property("ID").toUInt()),
widget->text().toUShort(&ok, 16));
}
}
}
void MainWindow::setupWidgetContainers()
{
coilButtons.setExclusive(false);
discreteButtons.setExclusive(false);
QRegularExpression regexp(QStringLiteral("coils_(?<ID>\\d+)"));
const QList<QCheckBox *> coils = findChildren<QCheckBox *>(regexp);
for (QCheckBox *cbx : coils)
coilButtons.addButton(cbx, regexp.match(cbx->objectName()).captured("ID").toInt());
connect(&coilButtons, &QButtonGroup::idClicked, this, &MainWindow::coilChanged);
regexp.setPattern(QStringLiteral("disc_(?<ID>\\d+)"));
const QList<QCheckBox *> discs = findChildren<QCheckBox *>(regexp);
for (QCheckBox *cbx : discs)
discreteButtons.addButton(cbx, regexp.match(cbx->objectName()).captured("ID").toInt());
connect(&discreteButtons, &QButtonGroup::idClicked, this, &MainWindow::discreteInputChanged);
regexp.setPattern(QLatin1String("(in|hold)Reg_(?<ID>\\d+)"));
const QList<QLineEdit *> qle = findChildren<QLineEdit *>(regexp);
for (QLineEdit *lineEdit : qle) {
registers.insert(lineEdit->objectName(), lineEdit);
lineEdit->setProperty("ID", regexp.match(lineEdit->objectName()).captured("ID").toInt());
lineEdit->setValidator(new QRegularExpressionValidator(QRegularExpression(QStringLiteral("[0-9a-f]{0,4}"),
QRegularExpression::CaseInsensitiveOption), this));
connect(lineEdit, &QLineEdit::textChanged, this, &MainWindow::setRegister);
}
}