pc-system/serial/serialtool.cpp

#include "SerialTool.h"
#include <QDebug>

// 定义静态成员变量并初始化为 nullptr
SerialTool* SerialTool::instance = nullptr;
QMutex SerialTool::globalMutex;
SerialTool::SerialTool(QObject *parent) : QObject(parent)
{

}
SerialTool::~SerialTool()
{
    if (serialPort.isOpen()) {
        serialPort.close();
    }
}

SerialTool* SerialTool::getInstance(QObject *parent, bool* success)
{

    if (instance == nullptr) {
        instance = new SerialTool(parent);
    }
    if (instance->isInUse) {
        if (success) {
            *success = false;
        }
        return nullptr;
    }
    instance->isInUse = true;
    if (success) {
        *success = true;
    }
//    globalMutex.unlock();
    return instance;
}
// 打开串口的函数
void SerialTool::openSerialPort()
{
    const QString portName = "COM8";
    const qint32 baudRate = 9600;

    if (!serialPort.isOpen()) {
        serialPort.setPortName(portName);
        serialPort.setBaudRate(baudRate);

        serialPort.setDataBits(QSerialPort::Data8);
        serialPort.setStopBits(QSerialPort::OneStop);
        serialPort.setParity(QSerialPort::NoParity);
        if (serialPort.open(QIODevice::ReadWrite)) {
            emit serialPortOpened(); // 发射新信号
        } else {
            emit openError();
        }
    }
}

// 关闭串口的函数
void SerialTool::closeSerialPort()
{
    if (serialPort.isOpen()) {
        serialPort.close();
        emit openCloseButtonTextChanged("打开串口");
    }
}

bool SerialTool::sendData(const QByteArray& data)
{
    if (serialPort.isOpen()) {
        qint64 bytesWritten = serialPort.write(data);
        return bytesWritten == data.size();
    }
    return false;
}

void SerialTool::handleSendDataReques(const QByteArray &data)
{
    sendData(data);
}

void SerialTool::readData()
{
    QByteArray newData = serialPort.readAll();
    buffer.append(newData);

    int startIndex = buffer.indexOf("\r\n");
    while (startIndex != -1) {
        int endIndex = buffer.indexOf("\r\n", startIndex + 2);
        if (endIndex != -1) {
            QByteArray command = buffer.mid(startIndex + 2, endIndex - startIndex - 2);
            emit dataReceived(newData);
            // 根据 command 的值发射相应的信号
                if (command == "BUTTON_DISABLED") {
                    emit disableButtonReceived();
                } else if (command == "BUTTON_PRESSED") {
                        emit buttonPressedReceived();
                } else if (command == "BUTTON_ENABLE") {
                        emit enableButtonReceived();
                }

            buffer = buffer.mid(endIndex + 2);
        } else {
            break;
        }
        startIndex = buffer.indexOf("\r\n");
    }

}


void SerialTool::setupSerialPort()
{
    openSerialPort();
    connect(&serialPort, &QSerialPort::readyRead, this, &SerialTool::readData);
}

void SerialTool::releaseInstance()
{
    isInUse = false;
}

bool SerialTool::getIsInUse()
{
    return isInUse ;
}