[提问]qt子线程串口不能接收数据 [复制链接]

大家好，我最近在写一个程序，建立了一个子线程，子线程中使用串口进行数据的收发，但是实际测试在串口操作的时候只能发送，无法接收，进一步定位发现readyread信号未被触发，网上的方法基本都试了一遍都不行，想看看大家有没有类似的经历，可以给我提供一些建议，感激不尽！
贴一下代码
子线程

#ifndef APPTHREAD_H
#define APPTHREAD_H

#include <QObject>
#include <QSerialPort>
#include <QElapsedTimer>
#include <QDebug>
#include <qtimer.h>


class AppThread : public QObject
{
    Q_OBJECT
public:
    explicit AppThread(QObject *parent = nullptr);

    void AppTask();
    QSerialPort *port;
    QTimer *portTimer;
    QByteArray *dataArray;
    quint8 *portRecvData;
    bool portSendMsg( quint8* msg ,int msgLen);
    int msgLen;
    bool recvFlag;
    bool Init();

signals:

private slots:

    void recvData();
    void timerUpdate();

};

#endif // APPTHREAD_H



子线程cpp




#include "appthread.h"
#include <QDebug>
#include <QThread>
AppThread::AppThread(QObject *parent) : QObject(parent)
{

}


void AppThread::AppTask()
{
    qDebug() << "当前线程对象的地址: " << QThread::currentThread();



    if(Init())
    {
        qDebug()<<"init";
    }
    quint8 data[]={0x01,0x02,0x03,0x05,0x08};
    portSendMsg(data,5);

    while (1) {

    }

}


bool AppThread::Init()
{
    //串口初始化
    port=new QSerialPort();
    portTimer=new QTimer();

    connect(port,&QSerialPort::readyRead,this,&AppThread::recvData);
    connect(portTimer,&QTimer::timeout,this,&AppThread::timerUpdate);

    port->setParity(QSerialPort::NoParity);
    port->setDataBits(QSerialPort::Data8);
    port->setStopBits(QSerialPort::OneStop);
    port->setPortName("ttyUSB0");
    port->setBaudRate(QSerialPort::Baud115200);
    port->open(QIODevice::ReadWrite);
    return port->isOpen();
}


bool AppThread::portSendMsg( quint8* msg ,int msgLen)
{

    QByteArray sendDate;
    sendDate.resize(msgLen);
    for(int i=0;i<msgLen;i++)
    {
        sendDate[i]=msg[i];
    }
    port->write(sendDate);
    QTimer timer;
    timer.start(500);
    while (!port->waitForBytesWritten())
    {
        if(timer.remainingTime())
        {
            qDebug()<<"no11";
            timer.stop();
            return false;
        }
    }
    timer.stop();
    qDebug()<<"yes";
    return true;
}




void AppThread::recvData()
{
    portTimer->start(30);//30ms
    dataArray->append(port->readAll());
    qDebug()<<"111";

}


void AppThread::timerUpdate()
{
    portTimer->stop();
    msgLen=dataArray->size();
    qDebug()<<dataArray;
    recvFlag=true;
}

主线程cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QThread>
#include <QDebug>
#include "appthread.h"
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    qDebug() << "主线程对象的地址: " << QThread::currentThread();



    QThread *AppT=new QThread;
    AppThread *App=new AppThread;
    App->moveToThread(AppT);
    AppT->start();
    //connect(AppT,SIGNAL(started()),App,SLOT(AppTask()));
    connect(AppT,&QThread::started,App,&AppThread::AppTask);




}

MainWindow::~MainWindow()
{
    delete ui;
}

主线程头文件
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private:
    Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H