Qt上位机软件串口通讯，视频源码，免费下载

#include "mainwindow.h" #include "ui_mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); system_init();//系统初始化 } MainWindow::~MainWindow() { delete ui; } void MainWindow::system_init() { //n,8,1 global_port.setParity(QSerialPort::NoParity); global_port.setDataBits(QSerialPort::Data8); global_port.setStopBits(QSerialPort::OneStop); //链接槽函数 connect(ui->btn_JianCeChuanKou,&QPushButton::clicked,this,MainWindow::but_JianCeComm); connect(ui->but_Open,&QPushButton::clicked,this,MainWindow::btn_open_port); connect(ui->but_send,&QPushButton::clicked,this,MainWindow::btn_send_data); connect(&global_port,&QSerialPort::readyRead,this,&receive_data); connect(ui->but_close,&QPushButton::clicked,this,MainWindow::btn_close_port); connect(ui->btn_qingkong,&QPushButton::clicked,this,MainWindow::btn_QingKongJieShou); } void MainWindow::but_JianCeComm(bool)//检测系统内串口信息 { ui->com_Port_no->clear();//清空当前列表 //检索端口 foreach(const QSerialPortInfo &info, QSerialPortInfo::availablePorts()) { ui->com_Port_no->addItem(info.portName()); } } void MainWindow::btn_close_port(bool) { global_port.close(); ui->label->setText("串口未打开"); } void MainWindow::btn_open_port(bool) { qDebug()<<ui->com_Port_no->currentIndex(); /* switch (ui->com_Port_no->currentIndex()) { case 0: global_port.setPortName("COM1"); break; case 1: global_port.setPortName("COM2"); break; default: global_port.setPortName("COM3"); break; } */ global_port.setPortName(ui->com_Port_no->currentText());//设置端口号 qDebug()<<ui->com_Port_no->currentText(); /////////////////////////////// /* switch (ui->com_bot->currentIndex()) { case 0: global_port.setBaudRate(QSerialPort::Baud115200); break; default: global_port.setBaudRate(QSerialPort::Baud9600); break; } */ global_port.setBaudRate(ui->com_bot->currentText().toInt());//设置波特率 qDebug()<<ui->com_bot->currentText().toInt(); //////////////////////////////////////// global_port.open(QIODevice::ReadWrite);//读写模式打开串口 ui->label->setText("串口已打开"); } void MainWindow::btn_send_data(bool) { QString send_data = ui->lineEdit->text();//从LineEdit得到字符串 QByteArray senddata; if(ui->checkBox->checkState() == Qt::Checked) { String2Hex(send_data,senddata);//将str字符串转换为16进制的形式 global_port.write(senddata);//16进制发送数据 }else{ //文本模式发送数据 QByteArray send_array = send_data.toLatin1();//QString类型转换成 QByteArray global_port.write(send_array);//串口发送数据 } } void MainWindow::receive_data() { QByteArray array = global_port.readAll(); if(ui->checkBox->checkState() == Qt::Checked) { ui->plainTextEdit->insertPlainText(QString(array.toHex(' ').toUpper().append(' ')));//16进制显示 }else{ ui->plainTextEdit->insertPlainText(QString(array));//文本模式 } } void MainWindow::btn_QingKongJieShou() { ui->plainTextEdit->setPlainText(""); } void MainWindow::String2Hex(QString str, QByteArray &senddata) { int hexdata,lowhexdata; int hexdatalen = 0; int len = str.length(); senddata.resize(len/2); char lstr,hstr; for(int i=0; i<len; ) { //char lstr, //hstr=str[i].toAscii();//qt4 hstr=str[i].toLatin1();//qt5 if(hstr == ' ') { i++; continue; } i++; if(i >= len) break; //lstr = str[i].toAscii();//qt4 lstr = str[i].toLatin1();//qt5 hexdata = ConvertHexChar(hstr); lowhexdata = ConvertHexChar(lstr); if((hexdata == 16) || (lowhexdata == 16)) break; else hexdata = hexdata*16+lowhexdata; i++; senddata[hexdatalen] = (char)hexdata; hexdatalen++; } senddata.resize(hexdatalen); } char MainWindow::ConvertHexChar(char ch) { if((ch >= '0') && (ch <= '9')) return ch-0x30; else if((ch >= 'A') && (ch <= 'F')) return ch-'A'+10; else if((ch >= 'a') && (ch <= 'f')) return ch-'a'+10; else return (-1); }