Linux QT串口通信遇到的问题_linux qt打不开ttyusb0-优快云博客

本文链接：https://blog.youkuaiyun.com/qyczyr/article/details/38320001

本文介绍了使用QT库在Linux下进行串口通信的实现，包括设置串口参数、读取数据以及信号槽的连接与断开。通过读取串口接收到的数据，解析并更新角度、油门和高度等信息。

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问题:遇到device can not open

解决：sudo chown young /dev/ttyUSB0

程序如下:

uart.h:

#ifndef UART_H
#define UART_H

#include <QObject>
#include <QTimer>
#include <QtSerialPort/QSerialPort>
class Uart : public QObject
{
    Q_OBJECT
public:
    explicit Uart(QObject *parent = 0);
    ~Uart();
    void InitUart();
    short roll;
    short pitch;
    short yaw;
    short m_throttle;
    float m_altitude;
    short gl_Angle;
private:
    QSerialPort *my_serialport;
    QByteArray requestData;
    unsigned char *buffer;
signals:
    void changeAngle(short,short,short);
    void changeThrottle(short);
    void changeAltitude(float);
    void changeYawGL(short);
    void changeAngleToUI(short,short,short);
    void isOpenUart(bool);
    void IsConnectControl(int);
public slots:
    void readUartSlot();
    void connectUart();
    void disconnectUart();
};

#endif // UART_H

uat.cpp:

#include "uart.h"
#include <QDebug>
#include <QMessageBox>
Uart::Uart(QObject *parent) :
    QObject(parent)
{
    roll = 0;
    pitch = 0;
    yaw = 0;
    m_throttle = 0;
    gl_Angle = 0;
    my_serialport = new QSerialPort();
    QString portName = "ttyUSB0";
    my_serialport->setPortName(portName);
    if(my_serialport->open(QIODevice::ReadOnly))
    {
        my_serialport->setBaudRate(115200);
        my_serialport->setDataBits(QSerialPort::Data8);
        my_serialport->setParity(QSerialPor