211 lines
4.9 KiB
Markdown
211 lines
4.9 KiB
Markdown
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# 1.引入头文件错误import error
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## 错误信息error info
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OS : Windows 7 64bit CN
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VS : 2013 、 2015 update 3
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CSerialPort : 4.0.0.181210 beta
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```
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1>CST2.obj : error LNK2019: 无法解析的外部符号 "public: virtual __thiscall itas109::CSerialPort::~CSerialPort(void)" (??1CSerialPort@itas109@@UAE@XZ)，该符号在函数 "public: virtual void * __thiscall itas109::CSerialPort::`vector deleting destructor'(unsigned int)" (??_ECSerialPort@itas109@@UAEPAXI@Z) 中被引用
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1>CST2Dlg.obj : error LNK2001: 无法解析的外部符号 "public: virtual __thiscall itas109::CSerialPort::~CSerialPort(void)" (??1CSerialPort@itas109@@UAE@XZ)
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```
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## 原因分析analysis
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暂无
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## 解决方案solution
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需要导入全部的文件到工程，不能只引用头文件，并且将cpp文件的预编译头修改为"不使用预编译头"。
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后续会出一个操作视频。
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# 2.this->m_mutex-> is nullptr
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## 错误信息error info
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OS : Windows 7 64bit CN
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VS : 2013 、 2015 update 3
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CSerialPort : 4.0.0.181210 beta
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```
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template<class mt_policy>
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class lock_block
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{
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public:
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mt_policy *m_mutex;
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lock_block(mt_policy *mtx)
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: m_mutex(mtx)
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{
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m_mutex->lock();//error code line
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}
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~lock_block()
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{
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m_mutex->unlock();
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}
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};
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```
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## 原因分析analysis
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1.VS2015 update 3 测试发现，在CSerialPort声明为全局变量时，sigslot.h类库会引发空指针异常。
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目前原因未完全定位
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2.VS2013未发现该问题
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3.目前测试发现在MFC自动生成的类内定义CSerialPort成员变量正常，但是其他类中也会有崩溃问题，等待后续分析
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## 解决方案solution
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在MFC自动生成的类内定义CSerialPort成员变量
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# 3.CommQT连续接收数据是程序崩溃
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## 错误信息error info
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```
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QTextLine: Can't set a line width while not layouting.
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QTextLayout::createLine: Called without layouting
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QTextLayout::endLayout: Called without beginLayout()
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```
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## 原因分析analysis
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## 解决方案solution
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# 4.QT的ui控件写数据异常
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## 错误信息error info
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```
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QObject::connect: Cannot queue arguments of type 'QTextBlock'
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(Make sure 'QTextBlock' is registered using qRegisterMetaType().)
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QObject: Cannot create children for a parent that is in a different thread.
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(Parent is QTextDocument(0x966ae0), parent's thread is QThread(0x93a328), current thread is QThread(0x25f5d88)
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QObject::connect: Cannot queue arguments of type 'QTextCursor'
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(Make sure 'QTextCursor' is registered using qRegisterMetaType().)
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```
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## 原因分析analysis
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不能在不用线程中操作UI
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## 解决方案solution
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```
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// mainwindow.h
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class MainWindow : public QMainWindow, public has_slots<>
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{
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Q_OBJECT
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public:
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explicit MainWindow(QWidget *parent = 0);
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~MainWindow();
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private slots:
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void OnReceive();
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void OnUpdateReceive(QString str);
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signals:
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void emitUpdateReceive(QString str);
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...
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};
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```
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```
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// mainwindow.cpp
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MainWindow::MainWindow(QWidget *parent) :
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QMainWindow(parent),
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ui(new Ui::MainWindow)
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{
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ui->setupUi(this);
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connect(this,&MainWindow::emitUpdateReceive,this,&MainWindow::OnUpdateReceive,Qt::QueuedConnection);
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...
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}
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void MainWindow::OnReceive()
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{
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...
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emitUpdateReceive(m_str);
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...
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}
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void MainWindow::OnUpdateReceive(QString str)
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{
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// update ui
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}
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```
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# 5.fatal error C1010预编译头错误
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## 错误信息error info
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```
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fatal error C1010: 在查找预编译头时遇到意外的文件结尾。是否忘记了向源中添加“#include "stdafx.h"”?
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fatal error C1010: unexpected end of file while looking for precompiled header. Did you forget to add '#include "stdafx.h"' to your source?
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```
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## 原因分析analysis
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建立工程时默认勾选了`预编译头`选项导致的
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## 解决方案solution
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关闭相应cpp的预处理头 :
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`cpp文件右键属性 -> C/C++ -> 预编译头`
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设置`预编译头`选项为`不使用预编译头`
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`cpp Properties -> C/C++ -> Precompiled Headers`
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set `Precompiled Header` to `Not Using Precompiled Header`
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## 6.接收数据缺少
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## 错误信息error info
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仅测试了windows
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A.数据缺少
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CSerialPort::CSerialPort()
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{
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p_serialPortBase = new CSERIALPORTBASE();
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p_serialPortBase->setMinByteReadNoify(2);
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//p_serialPortBase->setMinByteReadNoify(1);
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((CSERIALPORTBASE *)p_serialPortBase)->readReady.connect(this, &CSerialPort::onReadReady);
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}
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B.数据正常
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{
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p_serialPortBase = new CSERIALPORTBASE();
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//p_serialPortBase->setMinByteReadNoify(2);
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p_serialPortBase->setMinByteReadNoify(1);
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((CSERIALPORTBASE *)p_serialPortBase)->readReady.connect(this, &CSerialPort::onReadReady);
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}
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## 原因分析analysis
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可能原因：
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单个字符每次都触发
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但是2个及2个以上字符，只有超过最小数才能触发，所以数据会少，只有等待下次满足条件能触发。
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## 解决方案solution
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合理的优化：
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设置等待超时，例如最小数设置为2，但是如果两次接收间隔超过50ms，则认为已经不会再来数据，同样要触发接收。
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