100 lines
2.7 KiB
C++
100 lines
2.7 KiB
C++
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#include "mainwindow.h"
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#include "ui_mainwindow.h"
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#include <QVBoxLayout>
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#include <QMessageBox>
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#include <QDebug>
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#include "libmodbus/modbus.h"
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MainWindow::MainWindow(QWidget *parent)
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: QMainWindow(parent)
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, ui(new Ui::MainWindow)
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{
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ui->setupUi(this);
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this->resize(200, 60);
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this->setWindowTitle("libmodbus slave test");
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//pbRtu = new QPushButton("以modbus rtu方式读取地址1中前20个寄存器值", this);
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pbRtu = new QPushButton("modbus rtu", this);
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pbRtu->resize(200, 30);
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//pbTcp=new QPushButton("以modbus tcp方式读取地址1中前20个寄存器值", this);
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pbTcp = new QPushButton("modbus tcp", this);
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pbTcp->resize(200, 30);
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QWidget *w=new QWidget();
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QVBoxLayout *layout=new QVBoxLayout();
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layout->addWidget(pbRtu);
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layout->addWidget(pbTcp);
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w->setLayout(layout);
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this->setCentralWidget(w);
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connect(pbRtu, SIGNAL(clicked()), this, SLOT(doRtuQuery()));
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connect(pbTcp, SIGNAL(clicked()), this, SLOT(doTcpQuery()));
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}
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MainWindow::~MainWindow()
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{
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delete ui;
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}
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void MainWindow::doRtuQuery()
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{
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modbus_t *mb;
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uint16_t tab_reg[32]= {0};
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mb = modbus_new_rtu("\\\\.\\COM20", 9600, 'N', 8, 1); //相同的端口只能同时打开一个
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//modbus_set_debug(mb, true);
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modbus_set_slave(mb, 1); //设置modbus从机地址
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modbus_rtu_set_serial_mode(mb, MODBUS_RTU_RS485);
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modbus_connect(mb);
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struct timeval t;
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t.tv_sec=0;
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t.tv_usec=1000000; //设置modbus超时时间为1000毫秒
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modbus_set_response_timeout(mb, t.tv_usec,t.tv_usec);
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// uint16_t buffer[8] = { 0 };
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// for (int i = 0; i < 8; i++)
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// {
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// buffer[i] = rand();
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// qDebug() << buffer[i];
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// }
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// modbus_write_registers(mb, 40001, 8, buffer);
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int regs=modbus_read_registers(mb, 40001, 10, tab_reg);
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QMessageBox::about(NULL, "报告", QString("Rtu读取寄存器的个数:%1").arg(regs));
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modbus_close(mb);
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modbus_free(mb);
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}
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void MainWindow::doTcpQuery()
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{
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modbus_t *mb;
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uint16_t tab_reg[32]= {0};
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mb = modbus_new_tcp("127.0.0.1", 502); //由于是tcp client连接，在同一个程序中相同的端口可以连接多次。
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modbus_set_slave(mb, 1); //从机地址
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modbus_connect(mb);
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struct timeval t;
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t.tv_sec=0;
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t.tv_usec=1000000; //设置modbus超时时间为1000毫秒，注意：经测试，如果没有成功建立tcp连接，则该设置无效。
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modbus_set_response_timeout(mb,t.tv_usec,t.tv_usec);
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int regs=modbus_read_registers(mb, 40001, 10, tab_reg);
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QMessageBox::about(NULL, "报告", QString("Tcp读取寄存器的个数:%1").arg(regs));
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modbus_close(mb);
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modbus_free(mb);
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}
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