gui8000/uart.cpp

#include "uart.h"
#include "maindlg.h"
#include "includes.h"

Uart::Uart(QObject *parent)
    : QObject{parent}

{
    m_pMainDlg = static_cast<MainDlg*>(parent);//保存主窗口指针
    init();
}

Uart::~Uart(){
    if(m_pSerialPort != NULL){
        delete m_pSerialPort;
        m_pSerialPort = NULL;
    }

}

//模块初始化
void Uart::init(){

    m_pSerialPort = new QSerialPort();

    connect(this, &Uart::SignalSendDataToMainDlg, m_pMainDlg, &MainDlg::slotReceiveDataFromUart);
}

//获得本机可用串口列表
quint8 Uart::GetUartNameList(QList<QString> *pstrUartNameList, quint8 *pbyLen){
    QList<QSerialPortInfo> uartList; //本机串口列表
    quint8 byLen = 0;
    QString strUartName = "";//串口名称

    //获得本机可用串口
    uartList = QSerialPortInfo::availablePorts();
    byLen = uartList.size();
    if(byLen > 0){
        for(quint8 i = 0; i < byLen; i++){
            strUartName = uartList[i].portName();
            pstrUartNameList->append(strUartName);
        }
    }else{
        QMessageBox::information(m_pMainDlg, "提示", "本机暂无串口可用");
        return 0;
    }

    *pbyLen = byLen;

    return 1;
}

//打开串口
//uartName:串口名称
quint8 Uart::OpenUart(QString strUartName){
    //配置串口参数
    m_pSerialPort->setBaudRate(QSerialPort::Baud115200);
    m_pSerialPort->setDataBits(QSerialPort::Data8);
    m_pSerialPort->setStopBits(QSerialPort::OneStop);
    m_pSerialPort->setParity(QSerialPort::NoParity);
    m_pSerialPort->setPortName(strUartName);
    m_pSerialPort->setReadBufferSize(1024);

    //打开串口
    m_pSerialPort->open(QIODeviceBase::ReadWrite);
    if(m_pSerialPort->isOpen()){//打开成功
        //链接数据接收槽函数
        connect(m_pSerialPort, &QSerialPort::readyRead, this, &Uart::slotReceiveData);
    }else{//打开失败
        QMessageBox::critical(m_pMainDlg, "提示", "打开串口失败");
        return 0;
    }

    return 1;
}

//关闭串口
void Uart::CloseUart(){
    m_pSerialPort->close();
}

//接收数据的槽函数
void Uart::slotReceiveData(){
    QByteArray dataList;
    quint16 wLen = 0;

    dataList = m_pSerialPort->readAll();//读取缓存中全部数据
    wLen = dataList.size();//数据长度
    if(wLen){//收到了数据
        emit SignalSendDataToMainDlg(dataList, wLen);//将数据发送给主控模块
    }
}

// 发送数据
// 返回值: 本次发送的字节数，如果失败则返回 -1
qint64 Uart::SendData(QByteArray dataList) {
    quint16 wListLen = dataList.size();
    qint64 bytesSent = 0;  // 使用 qint64 以支持大文件传输
    bool result = false;

    if (m_pSerialPort->isOpen()) {
        for (quint8 i = 0; i < 3; i++) {
            bytesSent = m_pSerialPort->write(dataList);
            if ((bytesSent == wListLen) && (bytesSent != -1)) {
                result = m_pSerialPort->waitForBytesWritten(2000);
                if (result) {
                    break;  // 成功写入并等待完成
                } else {
                    bytesSent = -1;  // 写入成功但等待失败
                }
            } else {
                QThread::sleep(1);  // 使用 sleep 替代忙等待
            }
        }

        if(!result){
            QMessageBox::critical(m_pMainDlg, "提示", "发送数据到串口失败");
            bytesSent = -1;
        }
    } else {
        QMessageBox::information(m_pMainDlg, "提示", "请先打开串口");
        bytesSent = -1;
    }

    return bytesSent;
}