用QT写UART串口曲线变化
做项目经常会调试一下有变化规律的器件，如果只是打印出来显得观察变化规律不明显，所以自己用QT写了个串口数据变化曲线。
效果图：（点击查看，将就）
使用方法：
串口数据格式 (ASCII)： 序号+空格+数据+空格。。。(后面数据不讲究)
如数据：642 22.4600 \r\n
序号为1的时候会重画另一条颜色不同的曲线。
缺点：不支持界面缩放（一开始没布局，差不多完成的时候才发现，屏幕分辩率1920*1080）
源码下载地址：https://download.csdn.net/download/sudaroot/11149854
源码：(因为程序用了一个第三方的qcustomplot库，下面我就不复制上来了，太大了，网上下载添加编译即可）
main.cpp
#include "mainwindow.h"
#include
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.setWindowTitle("Serial Port Curve Debugging");
w.show();
return a.exec();
}
mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include
#include
static const char blankString[] = QT_TRANSLATE_NOOP("SettingsDialog", "N/A");
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow),
serial(new QSerialPort)
{
ui->setupUi(this);
curveZoom_flag = 1;
fillPortsParameters();
fillPortsInfo();
SerialSetinfo();
connect(ui->refreshButton, &QPushButton::clicked, this, &MainWindow::fillPortsInfo); //按键刷新串口
connect(ui->serialCtrlButton, &QPushButton::clicked, this, &MainWindow::switchSerialPort); //串口开关
connect(serial, &QSerialPort::readyRead, this, &MainWindow::readData);
connect(serial, &QSerialPort::errorOccurred, this, &MainWindow::handleError);
connect(ui->clearDataButton, &QPushButton::clicked, this, &MainWindow::clearData);
connect(ui->sendDataButton, &QPushButton::clicked, this, &MainWindow::writeData);
connect(ui->curveZoomButton, &QPushButton::clicked, this, &MainWindow::curveZoom);
connect(ui->curveClearButton, &QPushButton::clicked, this, &MainWindow::curveClear);
connect(ui->allClearButton, &QPushButton::clicked, this, &MainWindow::allClear);
ui->curveShowWidget->setInteractions(QCP::iRangeDrag | QCP::iRangeZoom|
QCP :: iSelectPlottables|QCP::iSelectItems|
QCP :: iSelectAxes| QCP::iSelectLegend);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::fillPortsParameters()
{
ui->baudRateBox->addItem(QStringLiteral("9600"), QSerialPort::Baud9600);
ui->baudRateBox->addItem(QStringLiteral("19200"), QSerialPort::Baud19200);
ui->baudRateBox->addItem(QStringLiteral("38400"), QSerialPort::Baud38400);
ui->baudRateBox->addItem(QStringLiteral("115200"), QSerialPort::Baud115200);
ui->baudRateBox->addItem(tr("Custom"));
ui->dataBitsBox->addItem(QStringLiteral("5"), QSerialPort::Data5);
ui->dataBitsBox->addItem(QStringLiteral("6"), QSerialPort::Data6);
ui->dataBitsBox->addItem(QStringLiteral("7"), QSerialPort::Data7);
ui->dataBitsBox->addItem(QStringLiteral("8"), QSerialPort::Data8);
ui->dataBitsBox->setCurrentIndex(3);
ui->parityBox->addItem(tr("None"), QSerialPort::NoParity);
ui->parityBox->addItem(tr("Even"), QSerialPort::EvenParity);
ui->parityBox->addItem(tr("Odd"), QSerialPort::OddParity);
ui->parityBox->addItem(tr("Mark"), QSerialPort::MarkParity);
ui->parityBox->addItem(tr("Space"), QSerialPort::SpaceParity);
ui->stopBitsBox->addItem(QStringLiteral("1"), QSerialPort::OneStop);
ui->stopBitsBox->addItem(QStringLiteral("2"), QSerialPort::TwoStop);
ui->flowControlBox->addItem(tr("None"), QSerialPort::NoFlowControl);
ui->flowControlBox->addItem(tr("RTS/CTS"), QSerialPort::HardwareControl);
ui->flowControlBox->addItem(tr("XON/XOFF"), QSerialPort::SoftwareControl);
}
void MainWindow::fillPortsInfo()
{
QString description, manufacturer, serialNumber;
ui->serialPortInfoListBox->clear();
const auto infos = QSerialPortInfo::availablePorts();
for(const QSerialPortInfo &info : infos)
{
QStringList list;
description = info.description();
manufacturer = info.manufacturer();
serialNumber = info.serialNumber();
list << info.portName()
<< (!description.isEmpty() ? description : blankString)
<< (!manufacturer.isEmpty() ? manufacturer : blankString)
<< (!serialNumber.isEmpty() ? serialNumber : blankString)
<< info.systemLocation()
<< (info.vendorIdentifier() ? QString::number(info.vendorIdentifier(), 16) : blankString)
<<(info.productIdentifier() ? QString::number(info.productIdentifier(), 16) : blankString);
ui->serialPortInfoListBox->addItem(list.first(), list.size());
}
ui->serialPortInfoListBox->addItem(tr("Custom"));
}
void MainWindow::SerialSetinfo()
{
//串口名
currentSerialSetings.name = ui->serialPortInfoListBox->currentText();
//波特率
if(ui->baudRateBox->currentIndex() == 4){
currentSerialSetings.baudRate = ui->baudRateBox->currentText().toInt();
}
else{
currentSerialSetings.baudRate = static_cast(ui->baudRateBox->itemData(ui->baudRateBox->currentIndex()).toInt());
}
currentSerialSetings.stringBaudRate = QString::number(currentSerialSetings.baudRate);
//数据位
currentSerialSetings.dataBits = static_cast(ui->dataBitsBox->itemData(ui->dataBitsBox->currentIndex()).toInt());
currentSerialSetings.stringDataBits = ui->dataBitsBox->currentText();
//校验位
currentSerialSetings.parity = static_cast(ui->parityBox->itemData(ui->parityBox->currentIndex()).toInt());
currentSerialSetings.stringParity = ui->parityBox->currentText();
//停止位
currentSerialSetings.stopBits = static_cast(ui->stopBitsBox->itemData(ui->stopBitsBox->currentIndex()).toInt());
currentSerialSetings.stringStopBits = ui->stopBitsBox->currentText();
//流控
currentSerialSetings.flowControl = static_cast(ui->flowControlBox->itemData(ui->flowControlBox->currentIndex()).toInt());
currentSerialSetings.stringFlowControl = ui->flowControlBox->currentText();
}
void MainWindow::openSerialPort()
{
serial->setPortName(currentSerialSetings.name);
serial->setBaudRate(currentSerialSetings.baudRate);
serial->setDataBits(currentSerialSetings.dataBits);
serial->setStopBits(currentSerialSetings.stopBits);
serial->setParity(currentSerialSetings.parity);
serial->setFlowControl(currentSerialSetings.flowControl);
if(serial->open(QIODevice::ReadWrite)){
qDebug() << "OK";
ui->refreshButton->setEnabled(false);
ui->serialPortInfoListBox->setEnabled(false);
ui->baudRateBox->setEnabled(false);
ui->dataBitsBox->setEnabled(false);
ui->parityBox->setEnabled(false);
ui->stopBitsBox->setEnabled(false);
ui->flowControlBox->setEnabled(false);
ui->serialCtrlButton->setText("关闭串口");
}
else {
qDebug() << "ERROR";
QMessageBox::critical(this, tr("Error"), serial->errorString());
}
}
void MainWindow::closeSerialPort()
{
if (serial->isOpen())
serial->close();
ui->refreshButton->setEnabled(true);
ui->serialPortInfoListBox->setEnabled(true);
ui->baudRateBox->setEnabled(true);
ui->dataBitsBox->setEnabled(true);
ui->parityBox->setEnabled(true);
ui->stopBitsBox->setEnabled(true);
ui->flowControlBox->setEnabled(true);
ui->serialCtrlButton->setText("打开串口");
}
void MainWindow::switchSerialPort()
{
SerialSetinfo();
if(serial_flag == 0){
serial_flag = 1;
openSerialPort();
}
else {
serial_flag = 0;
closeSerialPort();
}
}
void MainWindow::readData()
{
static int graph_count = 0;
static unsigned long count = 0;
QColor test[12] = {
Qt:: black, Qt:: red, Qt:: green, Qt:: blue, Qt:: cyan,
Qt:: magenta, Qt:: darkRed, Qt:: darkGreen,
Qt:: darkBlue, Qt:: darkCyan, Qt:: darkMagenta, Qt:: darkYellow
};
QByteArray temp = serial->readAll();
if(temp.isEmpty() != true){
#if 1
QString str = ui->receiveDataText->toPlainText(); //添加文本
str+=tr(temp);
ui->receiveDataText->clear();
ui->receiveDataText->append(str);
#else
ui->receiveDataText->append(temp); //添加文本
#endif
QByteArrayList list = temp.split(' '); //分割字符串
if(list.count() < 2) //数据缺失，丢包
return;
unsigned int num = list[0].toUInt();
double r_data = list[1].toDouble();
graph_count = ui->curveShowWidget->graphCount();
if(num == 1 || graph_count == 0 )
{
ui->curveShowWidget->addGraph();
graph_count = ui->curveShowWidget->graphCount();
qDebug() << graph_count;
ui->curveShowWidget->graph(graph_count - 1)->setPen(QPen(test[graph_count % 12 - 1]));
count = 0;
}
ui->curveShowWidget->graph(graph_count - 1)->addData(count++, r_data);
if(curveZoom_flag == 1){
ui->curveShowWidget->graph(graph_count - 1)->rescaleKeyAxis(true);
ui->curveShowWidget->graph(graph_count - 1)->rescaleValueAxis(true);
ui->curveShowWidget->graph(graph_count - 1)->rescaleAxes(true);
}
ui->curveShowWidget->replot();
}
}
void MainWindow::clearData()
{
ui->receiveDataText->clear();
}
void MainWindow::writeData()
{
if(ui->sendDataText->toPlainText().isEmpty() != true){
serial->write(ui->sendDataText->toPlainText().toLatin1());
}
}
void MainWindow::curveZoom()
{
if(curveZoom_flag == 0){
ui->curveZoomButton->setText("关闭缩放");
curveZoom_flag = 1;
}
else {
ui->curveZoomButton->setText("自动缩放");
curveZoom_flag = 0;
}
}
void MainWindow::curveClear()
{
int i = 0;
int graph_count = ui->curveShowWidget->graphCount();
for(i = 0; i < graph_count; i++)
{
ui->curveShowWidget->removeGraph(i);
}
}
void MainWindow::allClear()
{
curveClear();
clearData();
}
void MainWindow::handleError(QSerialPort::SerialPortError error)
{
if (error == QSerialPort::ResourceError) {
closeSerialPort();
}
}
mainwindow.ui
MainWindow
0
0
1920
1000
MainWindow
0
970
101
20
Author:sudaroot
159
39
1461
921
20
40
124
921
-
宋体
14
串口设置：
Qt::AlignCenter
-
Qt::Vertical
122
13
-
Qt::Horizontal
宋体
12
端 口
-1
-1
-
Qt::Vertical
17
13
-
Qt::Horizontal
宋体
12
波特率
-
Qt::Vertical
122
13
-
Qt::Horizontal
宋体
12
数据位
-
Qt::Vertical
17
13
-
Qt::Horizontal
宋体
12
校验位
-
Qt::Vertical
122
13
-
Qt::Horizontal
宋体
12
停止位
-
Qt::Vertical
122
13
-
Qt::Horizontal
宋体
12
流 控
-
Qt::Vertical
105
50
-
宋体
12
刷新
-
Qt::Vertical
122
30
-
宋体
12
打开串口
-
Qt::Vertical
122
80
-
宋体
12
曲线设置:
Qt::AlignCenter
-
Qt::Vertical
115
13
-
宋体
12
关闭缩放
-
Qt::Vertical
122
13
-
宋体
12
清除曲线
-
Qt::Vertical
20
100
-
宋体
12
全部清除
-
Qt::Vertical
122
13
830
12
111
24
宋体
18
曲线显示
Qt::AlignCenter
1630
32
263
610
-
-
Qt::Horizontal
78
20
-
宋体
14
接收数据
Qt::AlignCenter
-
Qt::Horizontal
88
20
-
true
261
531
-
-
Qt::Horizontal
40
38
-
101
41
清空
-
Qt::Horizontal
30
35
1633
690
263
271
-
-
Qt::Horizontal
40
20
-
76
20
宋体
14
发送数据
Qt::AlignCenter
-
Qt::Horizontal
40
20
-
261
191
-
-
Qt::Horizontal
40
20
-
101
41
发送
-
Qt::Horizontal
40
20
TopToolBarArea
false
QCustomPlot
QWidget
qcustomplot.h
1
全篇完。
本人博客仅仅代表我个人见解方便记录成长笔记。
若有与 看官老爷见解有冲突，我坚信看官老爷见解是对的，我的是错的。
感谢~！