#include "mainwindow.h"
#include "ui_mainwindow.h"
#include<QMessageBox>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
create_modbus_client();
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::create_modbus_client()
{
modbus_client=new QModbusRtuSerialMaster(this);
connect(modbus_client, &QModbusClient::errorOccurred, this {
QMessageBox::warning(this,"QModbus is error",QString("%1").arg(modbus_client->error()));
QMessageBox::warning(this,"QModbus is error",QString("%1").arg(modbus_client->errorString()));
return false;
});
modbus_client->setConnectionParameter(QModbusDevice::SerialPortNameParameter,
tr("COM1"));
modbus_client->setConnectionParameter(QModbusDevice::SerialParityParameter,
QSerialPort::EvenParity);
modbus_client->setConnectionParameter(QModbusDevice::SerialBaudRateParameter,
QSerialPort::Baud9600);
modbus_client->setConnectionParameter(QModbusDevice::SerialDataBitsParameter,
QSerialPort::Data8);
modbus_client->setConnectionParameter(QModbusDevice::SerialStopBitsParameter,
QSerialPort::OneStop);
modbus_client->setTimeout(1000);
modbus_client->setNumberOfRetries(3);
if (!modbus_client->connectDevice()) {
QMessageBox::warning(this,"Error",tr("Connect failed: ") + modbus_client->errorString());
return;
}
else
{
QMessageBox::about(this,"Congratulation",QString("Create Serial Port Succefully,the name is %1,"
"the parity is %2,the bandrate is %3,the databits is %4,"
"the stopbits is %5").arg(modbus_client->connectionParameter(QModbusDevice::SerialPortNameParameter).toString()).
arg(modbus_client->connectionParameter(QModbusDevice::SerialParityParameter).toString()).
arg(modbus_client->connectionParameter(QModbusDevice::SerialBaudRateParameter).toInt()).
arg(modbus_client->connectionParameter(QModbusDevice::SerialDataBitsParameter).toInt()).
arg(modbus_client->connectionParameter(QModbusDevice::SerialStopBitsParameter).toInt()));
}
}
QModbusDataUnit MainWindow::return_data_unit()
{
QModbusDataUnit data_unit;
const auto table =
static_cast<QModbusDataUnit::RegisterType> (ui->RegisterType_comboBox->currentIndex()+1);
data_unit.setRegisterType(table);
data_unit.setStartAddress(ui->StartAddress_spinBox->value());
data_unit.setValueCount(ui->DataNnumber_spinBox->value());
return data_unit;
}
void MainWindow::on_read_pushButton_clicked()
{
read_reply=modbus_client->sendReadRequest(return_data_unit(),ui->ServerAddress_spinBox->value());
/*if(!read_reply->isFinished())
{*/
connect(read_reply,SIGNAL(finished()),this,SLOT(display_response_value()));
//}
}
void MainWindow::display_response_value()
{
if(read_reply->error()==QModbusDevice::NoError)
{
const QModbusDataUnit unit = read_reply->result();
for (uint i = 0; i < unit.valueCount(); i++)
{
const QString entry = tr("Address: %1, Value: %2").arg(unit.startAddress())
.arg(QString::number(unit.value(i),
unit.registerType() <= QModbusDataUnit::Coils ? 10 : 16));
ui->readvalue_listWidget->addItem(entry);
}
}
else if(read_reply->error() == QModbusDevice::ProtocolError)
{
QString entry =tr("Read response error: %1 (QModbusDevice::ProtocolError,Mobus exception: 0x%2)").
arg(read_reply->errorString()).
arg(read_reply->rawResult().exceptionCode(), -1, 16);
ui->readvalue_listWidget->addItem(entry);
}
else
{
QString entry =tr("Read response error: %1 (code: 0x%2)").
arg(read_reply->errorString()).
arg(read_reply->error(), -1, 16);
ui->readvalue_listWidget->addItem(entry);
}
read_reply->deleteLater();
}
