C++ Q与Arduino通信时出现串行错误
我编写了一个简单的程序来使用Qt(从VisualStudio2013的源代码构建的版本5.5)与Arduino通信 下面是一个简单的固件,它从串口读取,10秒后打印“1”: 这是一个Qt程序,当我按下开始按钮时,它会以串行方式发送“1”,并持续侦听要读取的消息: main.cppC++ Q与Arduino通信时出现串行错误,c++,qt,arduino,serial-communication,C++,Qt,Arduino,Serial Communication,我编写了一个简单的程序来使用Qt(从VisualStudio2013的源代码构建的版本5.5)与Arduino通信 下面是一个简单的固件,它从串口读取,10秒后打印“1”: 这是一个Qt程序,当我按下开始按钮时,它会以串行方式发送“1”,并持续侦听要读取的消息: main.cpp #include "mainwindow.h" #include <QApplication> #pragma comment(lib, "advapi32") int main(int argc, c
#include "mainwindow.h"
#include <QApplication>
#pragma comment(lib, "advapi32")
int main(int argc, char *argv[]) {
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
SerialHandler.h
#pragma once
#include <QString>
#include <QtSerialPort>
#include <QtSerialPort/QSerialPort>
class SerialHandler {
public:
SerialHandler(QString& serialName);
~SerialHandler();
void moveForward();
private:
QSerialPort serial;
void writeOnSerial(QByteArray& msg);
private slots:
void handleReadyRead();
};
“1”以串行方式写入,由arduino读取,但计算机在10秒后从未收到任何回复,readyRead()信号从未触发
我在中看到了相同的错误,但在我的例子中,exec循环就在那里
有什么建议吗?这个最小的测试用例适用于我在Windows和OS X上的Arduino,使用最新的Qt 5.5 这种最小化是属于你的问题。演示这种简单的故障不需要多个文件(以及缺少的.ui)
// https://github.com/KubaO/stackoverflown/tree/master/questions/miniserial-36431493
#include <QtWidgets>
#include <QtSerialPort>
int main(int argc, char ** argv) {
QApplication app(argc, argv);
QWidget w;
QFormLayout layout(&w);
QPushButton ping("Send");
QTextBrowser output;
layout.addRow(&ping);
layout.addRow(&output);
w.show();
QSerialPort port("COM6");
port.setBaudRate(QSerialPort::Baud9600); // these are guaranteed to return true
port.setDataBits(QSerialPort::Data8);
port.setParity(QSerialPort::NoParity);
port.setStopBits(QSerialPort::OneStop);
port.setFlowControl(QSerialPort::NoFlowControl);
if (!port.open(QIODevice::ReadWrite))
output.append("! Can't open the port :(<br/>");
QObject::connect(&ping, &QPushButton::clicked, &port, [&]{
if (port.isOpen()) {
port.write("1");
output.append("> 1<br/>");
} else
output.append("! Write failed :(<br/>");
});
QObject::connect(&port, &QIODevice::readyRead, &output, [&]{
auto data = port.readAll();
output.append(QStringLiteral("< %1<br/>")
.arg(QString::fromLatin1(data).toHtmlEscaped()));
});
return app.exec();
}
//https://github.com/KubaO/stackoverflown/tree/master/questions/miniserial-36431493
#包括
#包括
int main(int argc,字符**argv){
QApplication应用程序(argc、argv);
qw;
QFormLayout布局图(&w);
QPushButton ping(“发送”);
QTextBrowser输出;
布局。添加行(&P);
布局。添加行(&O)输出;
w、 show();
QSerialPort端口(“COM6”);
port.setBaudRate(QSerialPort::Baud9600);//保证返回true
setDataBits(QSerialPort::Data8);
setParity(QSerialPort::NoParity);
端口.setStopBits(QSerialPort::OneStop);
port.setFlowControl(QSerialPort::NoFlowControl);
如果(!port.open(QIODevice::ReadWrite))
output.append(“!无法打开端口:(
”);
QObject::connect(&ping,&QPushButton::单击,&port,[&]{
if(port.isOpen()){
端口。写入(“1”);
输出。追加(“>1
”);
}否则
output.append(“!Write failed:(
”);
});
QObject::connect(&port,&QIODevice::readyRead,&output,[&]{
auto data=port.readAll();
output.append(QStringLiteral(<%1
))
.arg(QString::fromLatin1(data).toHtmlEscaped());
});
返回app.exec();
}
我认为您的构建也有一半缺陷:您不需要包含
,也不需要包含#pragma注释(lib,“advapi32”)
。只需包含
(或
但不能同时包含两者!)。如果它不起作用,则.pro
文件缺少QT+=serialport
行(和/或您没有重新运行qmake)。请注意,如果您在打开端口之前设置端口的参数,则这些方法都将返回设计为true
。这些设置将在打开端口时设置,如果设置失败,open
将失败并返回false。这完全足以检测故障,不管它在何处发生故障-工作端口将不要失败,一个即将消亡的设备可能会失败,但失败的轨迹将毫无帮助。这也会消除一些可翻译字符串,因此减轻翻译人员的负担。谢谢你的回答!明天早上我将测试它,我将试着找出我做错了什么!正如你在对我的问题的评论中所说,我的构建有问题。我把ba换成了ba感谢qtCreator,一切都完美无瑕,感谢您的帮助!
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :QMainWindow(parent), ui(new Ui::MainWindow), serialHandler(QString("COM6")) {
ui->setupUi(this);
QObject::connect(ui->startButton, SIGNAL(released()), this, SLOT(onStart()));
}
MainWindow::~MainWindow() {
delete ui;
}
void MainWindow::onStart() {
serialHandler.moveForward();
}
#pragma once
#include <QString>
#include <QtSerialPort>
#include <QtSerialPort/QSerialPort>
class SerialHandler {
public:
SerialHandler(QString& serialName);
~SerialHandler();
void moveForward();
private:
QSerialPort serial;
void writeOnSerial(QByteArray& msg);
private slots:
void handleReadyRead();
};
#include "SerialHandler.h"
#include <QDebug>
#include <QObject>
SerialHandler::SerialHandler(QString& serialName){
connect(&serial, SIGNAL(readyRead()), this, SLOT(handleReadyRead()));
// Initialize Serial
serial.setPortName(serialName);
if (!serial.setBaudRate(QSerialPort::Baud9600)) {
throw std::runtime_error(QObject::tr("Can't set rate 9600 baud to port %1, error code %2")
.arg(serial.portName()).arg(serial.error()).toStdString());
}
if (!serial.open(QIODevice::ReadWrite)) {
throw std::runtime_error(QObject::tr("Can't open %1, error code %2")
.arg(serial.portName()).arg(serial.error()).toStdString());
}
if (!serial.setDataBits(QSerialPort::Data8)) {
throw std::runtime_error(QObject::tr("Can't set 8 data bits to port %1, error code %2")
.arg(serial.portName()).arg(serial.error()).toStdString());
}
if (!serial.setParity(QSerialPort::NoParity)) {
throw std::runtime_error(QObject::tr("Can't set no patity to port %1, error code %2")
.arg(serial.portName()).arg(serial.error()).toStdString());
}
if (!serial.setStopBits(QSerialPort::OneStop)) {
throw std::runtime_error(QObject::tr("Can't set 1 stop bit to port %1, error code %2")
.arg(serial.portName()).arg(serial.error()).toStdString());
}
if (!serial.setFlowControl(QSerialPort::NoFlowControl)) {
throw std::runtime_error(QObject::tr("Can't set no flow control to port %1, error code %2")
.arg(serial.portName()).arg(serial.error()).toStdString());
}
}
SerialHandler::~SerialHandler(){
if (serial.isOpen()) {
serial.close();
}
}
void SerialHandler::handleReadyRead() {
qDebug() << serial.readAll();
}
void SerialHandler::writeOnSerial(QByteArray& msg) {
if (serial.isOpen() && serial.isWritable()) {
serial.write(msg);
serial.flush();
}
}
void SerialHandler::moveForward(){
QByteArray msg("1");
writeOnSerial(msg);
}
QObject::startTimer: Timers can only be used with threads started with QThread
// https://github.com/KubaO/stackoverflown/tree/master/questions/miniserial-36431493
#include <QtWidgets>
#include <QtSerialPort>
int main(int argc, char ** argv) {
QApplication app(argc, argv);
QWidget w;
QFormLayout layout(&w);
QPushButton ping("Send");
QTextBrowser output;
layout.addRow(&ping);
layout.addRow(&output);
w.show();
QSerialPort port("COM6");
port.setBaudRate(QSerialPort::Baud9600); // these are guaranteed to return true
port.setDataBits(QSerialPort::Data8);
port.setParity(QSerialPort::NoParity);
port.setStopBits(QSerialPort::OneStop);
port.setFlowControl(QSerialPort::NoFlowControl);
if (!port.open(QIODevice::ReadWrite))
output.append("! Can't open the port :(<br/>");
QObject::connect(&ping, &QPushButton::clicked, &port, [&]{
if (port.isOpen()) {
port.write("1");
output.append("> 1<br/>");
} else
output.append("! Write failed :(<br/>");
});
QObject::connect(&port, &QIODevice::readyRead, &output, [&]{
auto data = port.readAll();
output.append(QStringLiteral("< %1<br/>")
.arg(QString::fromLatin1(data).toHtmlEscaped()));
});
return app.exec();
}