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C++ Qt(C+;+;)中的Serial.write崩溃程序_C++_Qt_Serialization_Serial Port - Fatal编程技术网

C++ Qt(C+;+;)中的Serial.write崩溃程序

C++ Qt(C+;+;)中的Serial.write崩溃程序,c++,qt,serialization,serial-port,C++,Qt,Serialization,Serial Port,我试图将命令写入一个串行端口,该端口将改变我的电视输入,但当我试图将必要的命令写入端口时,我得到一个非常奇怪的输出 #include <QCoreApplication> #include <QSerialPort> #include <Windows.h> int set_id = 0; int fd = -1; int main(int argc, char *argv[]) { QCoreApplication app{argc, argv};

我试图将命令写入一个串行端口,该端口将改变我的电视输入,但当我试图将必要的命令写入端口时,我得到一个非常奇怪的输出

#include <QCoreApplication>
#include <QSerialPort>
#include <Windows.h>

int set_id = 0;
int fd = -1;
int main(int argc, char *argv[])
{
    QCoreApplication app{argc, argv};

int timeInSeconds=0;
while(timeInSeconds>0)
{
    printf("%d...\n",timeInSeconds);
    Sleep(1000);
    timeInSeconds--;
}


QSerialPort serial;
serial.setBaudRate(QSerialPort::Baud9600);
serial.setDataBits(QSerialPort::Data8);
serial.setParity(QSerialPort::NoParity);
serial.setStopBits(QSerialPort::OneStop);
serial.setFlowControl(QSerialPort::NoFlowControl);
serial.setPortName("com3");

serial.open(QIODevice::ReadWrite);

/*char cmd1='x';
char cmd2='b';
int value=20;
char cmd[20];
int len;
if (value >= 0x100)
    len = sprintf(cmd, "%c%c %02x %02x %02x\r", cmd1, cmd2, set_id, value>>8, value&255);
else
{
    len = sprintf(cmd, "%c%c %02x %02x\r", cmd1, cmd2, set_id, value);
}

serial.write(cmd, len);
*/

char cmdHex[5]="0xc5";
serial.write(cmdHex);
serial.close();

int stall;
scanf("%d",&stall);

//return a.exec();
}
#包括
#包括
#包括
int set_id=0;
int-fd=-1;
int main(int argc,char*argv[])
{
QCoreApplication{argc,argv};
int-timeinsectonds=0;
while(timeUnseconds>0)
{
printf(“%d..\n”,timeinsonds);
睡眠(1000);
时间不稳定--;
}
QSerialPort系列;
串行.setBaudRate(QSerialPort::Baud9600);
serial.setDataBits(QSerialPort::Data8);
serial.setParity(QSerialPort::NoParity);
串行.setStopBits(QSerialPort::OneStop);
serial.setFlowControl(QSerialPort::NoFlowControl);
serial.setPortName(“com3”);
serial.open(QIODevice::ReadWrite);
/*char cmd1='x';
char cmd2='b';
整数值=20;
char-cmd[20];
内伦;
如果(值>=0x100)
len=sprintf(cmd,“%c%c%02x%02x%02x\r”,cmd1,cmd2,set\u id,值>>8,值&255);
其他的
{
len=sprintf(cmd,“%c%c%02x%02x\r”,cmd1,cmd2,set\u id,value);
}
串行写入(cmd,len);
*/
char cmdHex[5]=“0xc5”;
串行写入(CMDEX);
serial.close();
内失速;
scanf(“%d”和“暂停”);
//返回a.exec();
}

该代码用于将电视输入更改为av。(从HDMI 1开始)另外,注释掉的块是我第一次尝试发送命令。

您应该学习Qt附带的QSerialPort示例。 还有
终端
项目,它是交互式的(对于测试端口来说很好),而
cwritersync
完成了您想要做的事情

以下是完整的
cwritersync
代码:

/****************************************************************************
**
** Copyright (C) 2013 Laszlo Papp <lpapp@kde.org>
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtSerialPort module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtSerialPort/QSerialPort>

#include <QTextStream>
#include <QCoreApplication>
#include <QFile>
#include <QStringList>

QT_USE_NAMESPACE

int main(int argc, char *argv[])
{
    QCoreApplication coreApplication(argc, argv);
    int argumentCount = QCoreApplication::arguments().size();
    QStringList argumentList = QCoreApplication::arguments();

    QTextStream standardOutput(stdout);

    if (argumentCount == 1) {
        standardOutput << QObject::tr("Usage: %1 <serialportname> [baudrate]").arg(argumentList.first()) << endl;
        return 1;
    }

    QSerialPort serialPort;
    QString serialPortName = argumentList.at(1);
    serialPort.setPortName(serialPortName);

    int serialPortBaudRate = (argumentCount > 2) ? argumentList.at(2).toInt() : QSerialPort::Baud9600;
    serialPort.setBaudRate(serialPortBaudRate);

    if (!serialPort.open(QIODevice::WriteOnly)) {
        standardOutput << QObject::tr("Failed to open port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
        return 1;
    }

    QFile dataFile;
    if (!dataFile.open(stdin, QIODevice::ReadOnly)) {
        standardOutput << QObject::tr("Failed to open stdin for reading") << endl;
        return 1;
    }

    QByteArray writeData(dataFile.readAll());
    dataFile.close();

    if (writeData.isEmpty()) {
        standardOutput << QObject::tr("Either no data was currently available on the standard input for reading, or an error occurred for port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
        return 1;
    }

    qint64 bytesWritten = serialPort.write(writeData);

    if (bytesWritten == -1) {
        standardOutput << QObject::tr("Failed to write the data to port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
        return 1;
    } else if (bytesWritten != writeData.size()) {
        standardOutput << QObject::tr("Failed to write all the data to port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
        return 1;
    } else if (!serialPort.waitForBytesWritten(5000)) {
        standardOutput << QObject::tr("Operation timed out or an error occurred for port %1, error: %2").arg(serialPortName).arg(serialPort.errorString()) << endl;
        return 1;
    }

    standardOutput << QObject::tr("Data successfully sent to port %1").arg(serialPortName) << endl;

    return 0;
}
/****************************************************************************
**
**版权所有(C)2013 Laszlo Papp
**联系人:http://www.qt.io/licensing/
**
**此文件是Qt工具箱的QtSerialPort模块的一部分。
**
**$QT_开始_许可证:LGPL21$
**商业许可证使用
**持有有效商业Qt许可证的被许可人可以在
**根据提供的商业许可协议
**软件或,或者,根据
**您与Qt公司之间的书面协议。牌照条款
**条件见http://www.qt.io/terms-conditions. 进一步
**信息请使用以下地址的联系方式:http://www.qt.io/contact-us.
**
**GNU次要通用公共许可证使用
**或者,该文件可根据GNU协议条款使用
**通用公共许可证版本2.1或免费发布的版本3
**软件基础并出现在文件许可证LGPLV21中
**此文件的打包中包含LICENSE.LGPLv3。请检查
**以下信息确保GNU Lesser通用公共许可证
**将满足以下要求:https://www.gnu.org/licenses/lgpl.html 和
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
**作为一个特殊的例外,Qt公司为您提供了某些额外的
**权利。Qt公司LGPL例外中描述了这些权利
**版本1.1,包含在此包中的文件LGPL_EXCEPTION.txt中。
**
**$QT_END_许可证$
**
****************************************************************************/
#包括
#包括
#包括
#包括
#包括
QT_使用名称空间
int main(int argc,char*argv[])
{
QCoreApplication coreApplication(argc、argv);
int argumentCount=QCoreApplication::arguments().size();
QStringList argumentList=QCoreApplication::arguments();
QTextStream标准输出(stdout);
if(argumentCount==1){

standardOutput Oops。当输出为:“QObject::startTimer:计时器只能用于以QThread启动的线程”时,我忘记添加了
您可能无法像那样使用串行端口。您应该启动事件循环,并在写入完成后退出它。此外,此代码不会输出您声称的错误-无论是在Windows上还是在OS X上。最后,当您可以简单地写入
serial.write(“0xc5”)时
。您应该使用
QByteArray
和或
qsnprintf
而不是固定大小的缓冲区。@KubaOber是正确的,并且只有在端口打开成功时(即如果可以打开com3)才会发生错误。谢谢!这段代码非常有用。我只有两个问题:如何确定stdin文件的位置,以及如何修改它?另外,当我在安装了Qt的计算机上运行它时,这段代码会运行。有没有办法通过将.dll文件与应用程序文件打包来实现这一点?在您的情况下,您不需要stdin,c用你的数据只填写一个代码>写DeDATA < /Cord>。对于部署,请查看DOC()和Win Apple QuoT。如果你觉得它有用,可以考虑对其进行投票,谢谢。