Qt实现Kermit协议(六)

3 实现

3.5 KermitFileRecver

该模块实现了Kermit异步接收文件功能。

3.5.1 KermitFileRecver定义

class QSerialPort;
class KermitFileRecver : public QObject
{Q_OBJECT
public:explicit KermitFileRecver(QSerialPort *serial, QObject *parent = nullptr);~KermitFileRecver();
signals:void start_recv(QString const& fileName);void cancel_recv();void gotFileSize(quint64 filesize);void progressInfo(quint32 blockNumber, quint64 bytesOfSend);void finished();void error(QString const& e);
public:void start(QString const& fileName);void stop();void cancel();
private:QThread workerThread;
};

公共接口：

start 开始接收文件
stop 停止传输文件
cancel 中断传输文件

信号：

gotFileSize 文件大小信号
progressInfo 传输进度信号
error 出错信号
finished 传输结束信号
start_recv 开始接收文件信号
cancel_recv 中断传输文件信号

3.5.2 KermitFileRecver实现

3.5.2.1 构造函数/析构函数

KermitFileRecver::KermitFileRecver(QSerialPort *serial, QObject *parent): QObject(parent)
{KermitRecvFile* worker = new KermitRecvFile(serial);serial->moveToThread(&workerThread);worker->moveToThread(&workerThread);connect(&workerThread, &QThread::finished, worker, &QObject::deleteLater);connect(this, &KermitFileRecver::start_recv, worker, &KermitRecvFile::start);connect(this, &KermitFileRecver::cancel_recv, worker, &KermitRecvFile::cancel);connect(worker, &KermitRecvFile::gotFileSize, this, &KermitFileRecver::gotFileSize);connect(worker, &KermitRecvFile::progressInfo, this, &KermitFileRecver::progressInfo);connect(worker, &KermitRecvFile::finished, this, &KermitFileRecver::finished);connect(worker, &KermitRecvFile::error, this, &KermitFileRecver::error);workerThread.start();
}KermitFileRecver::~KermitFileRecver()
{workerThread.quit();workerThread.wait();
}

函数说明:

构造函数
- 将serial和worker移动到workerThread线程
- 连接信号和槽函数
- 启动线程
析构函数
- 退出线程
- 等待线程退出

3.5.2.2 start/stop/cancel

void KermitFileRecver::start(QString const& fileName)
{emit start_recv(fileName);
}void KermitFileRecver::stop()
{worker->stop();
}void KermitFileRecver::cancel()
{emit cancel_recv();
}