基于qt的usb串口通信

#include "widget.h" #include "ui_widget.h" #include <QFile> #include <QTextStream> #include <QFileDialog> #include <QMessageBox> Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) { ui->setupUi(this); this->setWindowTitle("UartAssistant"); //this->setMaximumSize(500); this->setMinimumSize(600,500); int WIDTH = 40; //上下Y间隔 int LENGTH = 400; //X坐标 //按钮 button_open_port = new QPushButton(this); button_send = new QPushButton(this); button_open_port->setText("Open Port"); button_open_port->setGeometry(QRect(260,100,100,30)); button_send->setText("Send"); button_send->setGeometry(QRect(260,330,100,30)); button_clearRec = new QPushButton(this); button_clearSend = new QPushButton(this); button_clearRec->setText("清空接收区"); button_clearRec->setGeometry(QRect(260,150,100,30)); button_clearSend->setText("清空发送区"); button_clearSend->setGeometry(QRect(260,380,100,30)); button_save = new QPushButton(this); button_save->setText("保存"); button_save->setGeometry(QRect(LENGTH,345,120,50)); //文本框 label1 = new QLabel(this); label1->setText("RecvBuffer"); label1->setGeometry(QRect(50,25,100,20)); label2 = new QLabel(this); label2->setText("SendBuffer"); label2->setGeometry(QRect(50,260,100,20)); //多行文本 text_RecvBuffer = new QTextEdit(this); text_SendBuffer = new QTextEdit(this); text_RecvBuffer->setGeometry(QRect(50,45,200,200)); text_RecvBuffer->setReadOnly(true); text_SendBuffer->setGeometry(QRect(50,280,200,200)); //列表框 //串口 label_Serial_port = new QLabel(this); label_Serial_port->setText("串 口"); label_Serial_port->setGeometry(QRect(LENGTH,WIDTH,80,20)); label_BaudRate = new QLabel(this); label_BaudRate->setText("波特率"); label_BaudRate->setGeometry(QRect(LENGTH,2*WIDTH,80,20)); label_Data = new QLabel(this); label_Data->setText("数据位"); label_Data->setGeometry(QRect(LENGTH,3*WIDTH,80,20)); Parity = new QLabel(this); Parity->setText("校验位"); Parity->setGeometry(QRect(LENGTH,4*WIDTH,80,20)); Stop = new QLabel(this); Stop->setText("停止位"); Stop->setGeometry(QRect(LENGTH,5*WIDTH,80,20)); ComboBox_port = new QComboBox(this); ComboBox_port->setGeometry(QRect(LENGTH+40,WIDTH,80,20)); QStringList com; com<<"COM1"<<"COM2"<<"COM3"<<"COM4"; ComboBox_port->addItems(com); ComboBox_port->setCurrentIndex(2); //波特率 ComboBox_BaudRate = new QComboBox(this); ComboBox_BaudRate->setGeometry(QRect(LENGTH+40,2*WIDTH,80,20)); QStringList baud; baud<<"1200"<<"2400"<<"4800"<<"9600"<<"19200"<<"38400"<<"57600"<<"115200"; ComboBox_BaudRate->addItems(baud); ComboBox_BaudRate->setCurrentIndex(3); //数据位 ComboBox_Data = new QComboBox(this); ComboBox_Data->setGeometry(QRect(LENGTH+40,3*WIDTH,80,20)); QStringList data; data<<"8"<<"7"<<"6"<<"5"; ComboBox_Data->addItems(data); //校验位 ComboBox_Parity = new QComboBox(this); ComboBox_Parity->setGeometry(QRect(LENGTH+40,4*WIDTH,80,20)); QStringList parity; parity<<"NONE"<<"ODD"<<"EVEN"; ComboBox_Parity->addItems(parity); //停止位 Combobox_Stop = new QComboBox(this); Combobox_Stop->setGeometry(QRect(LENGTH+40,5*WIDTH,80,20)); QStringList stop; stop<<"1"<<"1.5"<<"2"; Combobox_Stop->addItems(stop); Combobox_Stop->setCurrentIndex(0); //十六进制复选框 Send16 = new QCheckBox(this); Send16->setGeometry(QRect(260,430,100,30)); Send16->setText("十六进制发送"); Recv16 = new QCheckBox(this); Recv16->setGeometry(QRect(260,200,100,30)); Recv16->setText("十六进制接收"); Recv16->setCheckState(Qt::Checked); connect(button_open_port,SIGNAL(clicked()),this,SLOT(on_openPortBtn_clicked())); connect(button_send,SIGNAL(clicked()),this,SLOT(on_SendBtn_clicked())); connect(button_clearRec,SIGNAL(clicked(bool)),text_RecvBuffer,SLOT(clear())); connect(button_clearSend,SIGNAL(clicked(bool)),text_SendBuffer,SLOT(clear())); connect(button_save,SIGNAL(clicked(bool)),this,SLOT(file_save())); connect(Recv16,SIGNAL(clicked(bool)),this,SLOT(checkChange())); } void Widget::on_openPortBtn_clicked() { if(ComboBox_port->isEnabled()) { serial = new QSerialPort(ComboBox_port->currentText()); serial->setPortName(ComboBox_port->currentText()); serial->setBaudRate(ComboBox_BaudRate->currentText().toInt(),QSerialPort::AllDirections); serial->setDataBits(static_cast<QSerialPort::DataBits>(ComboBox_Data->currentText().toInt())); serial->setFlowControl(QSerialPort::NoFlowControl); serial->setParity(static_cast<QSerialPort::Parity>(ComboBox_Parity->currentText().toInt())); serial->setStopBits(static_cast<QSerialPort::StopBits>(Combobox_Stop->currentText().toInt())); serial->close(); if(serial->open(QIODevice::ReadWrite)) { //打开串口后无法更改设置 ComboBox_port->setDisabled(true); ComboBox_BaudRate->setDisabled(true); ComboBox_Data->setDisabled(true); ComboBox_port->setDisabled(true); ComboBox_Parity->setDisabled(true); Combobox_Stop->setDisabled(true); button_open_port->setText("ClosePort"); is_open_port = true; connect(serial,&QSerialPort::readyRead,this,Widget::read_Com); }else{ QMessageBox::critical(this, tr("打开串口失败！"), tr("无法打开串口") + ComboBox_port->currentText() + tr("\n (The serial unvaliable)"), QMessageBox::Ok); } }else{ button_open_port->setText("Open Port"); ComboBox_port->setEnabled(true); ComboBox_BaudRate->setEnabled(true); ComboBox_Data->setEnabled(true); ComboBox_port->setEnabled(true); ComboBox_Parity->setEnabled(true); Combobox_Stop->setEnabled(true); serial->close(); is_open_port = false; } } void Widget::on_SendBtn_clicked() { if(is_open_port) { if(Send16->checkState() == Qt::Checked) { QByteArray senddata = Widget::QString2Hex(text_SendBuffer->toPlainText()); //转换为16进制 serial->write(senddata); }else{ serial->write(text_SendBuffer->toPlainText().toLocal8Bit()); //text_SendBuffer->clear(); } }else{ QMessageBox::critical(this, tr("发送数据失败！"), tr("未选择或打开有效串口") + tr("\n (请打开有效的串口)"), QMessageBox::Ok); } } void Widget::read_Com() { QByteArray temp = serial->readAll(); if(!temp.isEmpty()) { if(Recv16->checkState() == Qt::Checked) { text_RecvBuffer->insertPlainText("0x"); text_RecvBuffer->insertPlainText(temp.toHex().toUpper()); text_RecvBuffer->insertPlainText(" "); }else{ text_RecvBuffer->insertPlainText(QString(temp)); } } } void Widget::file_save() { QString path = QFileDialog::getSaveFileName( this, "Open File", ".", "Text Files(*.txt)"); if(!path.isEmpty()) { QFile file(path); if(!file.open(QIODevice::WriteOnly | QIODevice::Text)) { QMessageBox::warning(this,tr("Write File"), tr("Cannot open file:\n%1").arg(path)); return; } QTextStream out(&file); out << "SendBuffer:\n " << qSetFie