QT做串口:
main.cpp
#include "myserial.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MySerial w;
w.show();
return a.exec();
}
myserial.cpp
#include "myserial.h"
#include "ui_myserial.h"
#include <QDebug>
MySerial::MySerial(QWidget *parent)
: QWidget(parent)
, ui(new Ui::MySerial)
{
ui->setupUi(this);
//获取系统所有可用的串口
foreach(const QSerialPortInfo &info,QSerialPortInfo::availablePorts()){
qDebug()<<info.portName()<<info.description();
//ui->comboBox_serialport->addItem(info.portName());
QSerialPort serial(info);
//测试串口是否可用
if(serial.open(QIODevice::ReadWrite)){//空闲
//将串口名加入选项列表
ui->comboBox_serialport->addItem(serial.portName());
//关闭串口
serial.close();
}
else{//被占用
ui->comboBox_serialport->addItem(serial.portName()+"(被占用)");
}
}
ui->pushButton_send->setEnabled(false);
}
MySerial::~MySerial()
{
delete ui;
}
//打开/关闭串口
void MySerial::on_pushButton_openclose_clicked()
{
if(ui->pushButton_openclose->text()=="打 开 串 口"){//打开
ser = new QSerialPort(ui->comboBox_serialport->currentText(),this);
//打开串口
if(!ser->open(QIODevice::ReadWrite)){
qDebug()<<"打开失败";
ser->deleteLater();
return;
}
//设置波特率
switch (ui->comboBox_baudrate->currentIndex()) {
case 0:
ser->setBaudRate(QSerialPort::Baud2400);
break;
case 1:
ser->setBaudRate(QSerialPort::Baud4800);
break;
case 2:
ser->setBaudRate(QSerialPort::Baud9600);
break;
case 3:
ser->setBaudRate(QSerialPort::Baud38400);
break;
case 4:
ser->setBaudRate(QSerialPort::Baud115200);
break;
}
//设置数据位位数
switch (ui->comboBox_databits->currentIndex()) {
case 0:
ser->setDataBits(QSerialPort::Data5);
break;
case 1:
ser->setDataBits(QSerialPort::Data6);
break;
case 2:
ser->setDataBits(QSerialPort::Data7);
break;
case 3:
ser->setDataBits(QSerialPort::Data8);
break;
}
//设置校验位
switch (ui->comboBox_parity->currentIndex()) {
case 0:
ser->setParity(QSerialPort::NoParity);
break;
case 1:
ser->setParity(QSerialPort::OddParity);
break;
case 2:
ser->setParity(QSerialPort::EvenParity);
break;
}
//设置停止位
switch (ui->comboBox_parity->currentIndex()) {
case 0:
ser->setStopBits(QSerialPort::OneStop);
break;
case 1:
ser->setStopBits(QSerialPort::TwoStop);
break;
}
//关闭流控
ser->setFlowControl(QSerialPort::NoFlowControl);
//关闭选项菜单
ui->comboBox_parity->setEnabled(false);
ui->comboBox_baudrate->setEnabled(false);
ui->comboBox_databits->setEnabled(false);
ui->comboBox_stopbits->setEnabled(false);
ui->comboBox_serialport->setEnabled(false);
ui->pushButton_send->setEnabled(true);
//修改按钮显示
ui->pushButton_openclose->setText("关 闭 串 口");
//连接信号和槽
QObject::connect(ser,&QSerialPort::readyRead,this,&MySerial::readData);
}
else{//关闭
ser->clear();
ser->close();
ser->deleteLater();
ui->comboBox_parity->setEnabled(true);
ui->comboBox_baudrate->setEnabled(true);
ui->comboBox_databits->setEnabled(true);
ui->comboBox_stopbits->setEnabled(true);
ui->comboBox_serialport->setEnabled(true);
ui->pushButton_send->setEnabled(false);
ui->pushButton_openclose->setText("打 开 串 口");
}
}
//接收数据
void MySerial::readData()
{
//接收所有数据
QByteArray data = ser->readAll();
if(!data.isEmpty()){
ui->textBrowser->append(QString(data));
}
//data.clear();
}
//发送数据
void MySerial::on_pushButton_send_clicked()
{
//获取要发送的数据
QByteArray data = ui->textEdit->toPlainText().toUtf8();
ser->write(data);
}
myserial.h
#ifndef MYSERIAL_H
#define MYSERIAL_H
#include <QWidget>
#include <QSerialPortInfo>
#include <QSerialPort>
QT_BEGIN_NAMESPACE
namespace Ui { class MySerial; }
QT_END_NAMESPACE
class MySerial : public QWidget
{
Q_OBJECT
public:
MySerial(QWidget *parent = nullptr);
~MySerial();
private slots:
void on_pushButton_openclose_clicked();
//接收串口数据槽函数
void readData();
void on_pushButton_send_clicked();
private:
Ui::MySerial *ui;
//串口类
QSerialPort *ser;
};
#endif // MYSERIAL_H
4.5.6行的 #include问题 的解决方案:
https://blog.csdn.net/qq_52926110/article/details/122780655
mySerial.pro
QT += core gui serialport
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
CONFIG += c++11
# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
SOURCES += \
main.cpp \
myserial.cpp
HEADERS += \
myserial.h
FORMS += \
myserial.ui
# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target
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QT的新建工程文件部分:
最简单的结构:
main.cpp:
#include "mainwindow.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = nullptr);
~MainWindow();
private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H
重点详解步骤:
mySerial.pro
qt串口这里需要用到一个很关键的类serialport
,要现在.pro工程文件里面添加该模块(在QT += core gui
代码后面加上该模块)
.pro
QT += core gui serialport
myserial.cpp
接下来,使用代码将串口号给加进去。打开“myserial.cpp文件”,对文件进行编写和修改。
#include "myserial.h"
#include "ui_myserial.h"
#include <QDebug> /************************/
myserial::myserial(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::myserial)
{
ui->setupUi(this);
/******************获取系统所有可用的串口(后加的功能)*******************/
//获取系统所有可用的串口
foreach(const QSerialPortInfo &info,QSerialPortInfo::availablePorts()){
qDebug()<<info.portName()<<info.description();
//ui->comboBox_serialport->addItem(info.portName());
QSerialPort serial(info);
//测试串口是否可用
if(serial.open(QIODevice::ReadWrite)){//空闲
//将串口名加入选项列表
ui->comboBox_serialport->addItem(serial.portName());
//关闭串口
serial.close();
}
else{//被占用
ui->comboBox_serialport->addItem(serial.portName()+"(被占用)");
}
}
ui->pushButton_send->setEnabled(false);
/***************************************************************/
}
myserial::~myserial()
{
delete ui;
}
打开或者关闭串口功能(myserial.cpp)
/****************************打开/关闭串口***************************/
void myserial::on_pushButton_openclose_clicked()
{
if(ui->pushButton_openclose->text()=="打 开 串 口"){//打开
ser = new QSerialPort(ui->comboBox_serialport->currentText(),this);
//打开串口
if(!ser->open(QIODevice::ReadWrite)){
qDebug()<<"打开失败";
ser->deleteLater();
return;
}
//设置波特率
switch (ui->comboBox_baudrate->currentIndex()) {
case 0:
ser->setBaudRate(QSerialPort::Baud2400);
break;
case 1:
ser->setBaudRate(QSerialPort::Baud4800);
break;
case 2:
ser->setBaudRate(QSerialPort::Baud9600);
break;
case 3:
ser->setBaudRate(QSerialPort::Baud38400);
break;
case 4:
ser->setBaudRate(QSerialPort::Baud115200);
break;
}
//设置数据位位数
switch (ui->comboBox_databits->currentIndex()) {
case 0:
ser->setDataBits(QSerialPort::Data5);
break;
case 1:
ser->setDataBits(QSerialPort::Data6);
break;
case 2:
ser->setDataBits(QSerialPort::Data7);
break;
case 3:
ser->setDataBits(QSerialPort::Data8);
break;
}
//设置校验位
switch (ui->comboBox_parity->currentIndex()) {
case 0:
ser->setParity(QSerialPort::NoParity);
break;
case 1:
ser->setParity(QSerialPort::OddParity);
break;
case 2:
ser->setParity(QSerialPort::EvenParity);
break;
}
//设置停止位
switch (ui->comboBox_parity->currentIndex()) {
case 0:
ser->setStopBits(QSerialPort::OneStop);
break;
case 1:
ser->setStopBits(QSerialPort::TwoStop);
break;
}
//关闭流控
ser->setFlowControl(QSerialPort::NoFlowControl);
//关闭选项菜单
ui->comboBox_parity->setEnabled(false);
ui->comboBox_baudrate->setEnabled(false);
ui->comboBox_databits->setEnabled(false);
ui->comboBox_stopbits->setEnabled(false);
ui->comboBox_serialport->setEnabled(false);
ui->pushButton_send->setEnabled(true);
//修改按钮显示
ui->pushButton_openclose->setText("关 闭 串 口");
//连接信号和槽
QObject::connect(ser,&QSerialPort::readyRead,this,&myserial::readData);
}
else{//关闭
ser->clear();
ser->close();
ser->deleteLater();
ui->comboBox_parity->setEnabled(true);
ui->comboBox_baudrate->setEnabled(true);
ui->comboBox_databits->setEnabled(true);
ui->comboBox_stopbits->setEnabled(true);
ui->comboBox_serialport->setEnabled(true);
ui->pushButton_send->setEnabled(false);
ui->pushButton_openclose->setText("打 开 串 口");
}
}
接收数据功能(myserial.cpp)
//接收数据
void myserial::readData()
{
//接收所有数据
QByteArray data = ser->readAll();
QString str = QString(data);
if(!data.isEmpty()){
ui->textBrowser->append(QString(str));
}
//data.clear();
}
发送数据功能(myserial.cpp)
//发送数据
void myserial::on_pushButton_send_clicked()
{
//获取要发送的数据
QByteArray data = ui->textEdit->toPlainText().toUtf8();
ser->write(data);
}
标签:case,ser,comboBox,QSerialPort,break,助手,ui,串口,QT
From: https://www.cnblogs.com/L707/p/17144742.html