#include "widget.h"
#include "ui_widget.h"
#include <QSerialPortInfo>//添加串口头文件
#include <QMessageBox>//提示头文件


Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);

    serialPort = new QSerialPort(this);//创建串口对象

    //定义串口号
    QStringList serialPortNums;


    //获取串口号并显示
    foreach (const QSerialPortInfo &info, QSerialPortInfo::availablePorts()) {
        serialPortNums<<info.portName();
    }
    ui->serialPortNum->addItems(serialPortNums);

    //关联数据接收槽函数
    connect(serialPort,SIGNAL(readyRead()),this,SLOT(serialDataReadReady_Slot()));
}

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

//数据接收槽函数
void Widget::serialDataReadReady_Slot(){
    QString buff;//暂存数据
    buff = QString(serialPort->readAll());//读取串口的数据
    ui->dataRCV->appendPlainText(buff);//将数据发送到接受区内
}

void Widget::on_btnOpenSerial_clicked()//打开串口-点击信号对应的槽函数
{
    //声明变量
    QSerialPort::BaudRate baudRate;
    QSerialPort::DataBits dataBits;
    QSerialPort::StopBits stopBits;
    QSerialPort::Parity parity;
    //赋值，初始化
    //波特率
    if(ui->baudRate->currentText() == "4800"){
        baudRate = QSerialPort::Baud4800;
    }else if(ui->baudRate->currentText() == "9600"){
        baudRate = QSerialPort::Baud9600;
    }else if(ui->baudRate->currentText() == "115200"){
        baudRate = QSerialPort::Baud115200;
    }
    //数据位
    if(ui->dataBits->currentText()=="5"){
        dataBits = QSerialPort::Data5;
    }else if(ui->dataBits->currentText()=="6"){
        dataBits = QSerialPort::Data6;
    }else if(ui->dataBits->currentText()=="7"){
        dataBits = QSerialPort::Data7;
    }else if(ui->dataBits->currentText()=="8"){
        dataBits = QSerialPort::Data8;
    }
    //停止位
    if(ui->stopBits->currentText()=="1"){
        stopBits = QSerialPort::OneStop;
    }else if(ui->stopBits->currentText()=="1.5"){
        stopBits = QSerialPort::OneAndHalfStop;
    }else if(ui->stopBits->currentText()=="2"){
        stopBits = QSerialPort::TwoStop;
    }
    //校验位
    if(ui->parity->currentText()=="none"){
        parity = QSerialPort::NoParity;
    }

    //获取当前选择的串口号
    serialPort->setPortName(ui->serialPortNum->currentText());
    //设置串口参数
    serialPort->setBaudRate(baudRate);
    serialPort->setDataBits(dataBits);
    serialPort->setStopBits(stopBits);
    serialPort->setParity(parity);

    //判断串口是否打开成功，并提示，需要添加<QMessgaeBox>头文件
    if(serialPort->open(QIODevice::ReadWrite) == true){
        QMessageBox::information(this,"提示","成功");
    }else {
        QMessageBox::critical(this,"提示","失败");
    }

}

void Widget::on_btnCloseSerial_clicked()//关闭串口
{
    serialPort->close();
}


void Widget::on_btnSend_clicked()//数据发送槽函数
{
    serialPort->write(ui->dataInput->text().toLocal8Bit().data());
}

void Widget::on_btnClear_clicked()//清空槽函数
{
    ui->dataRCV->clear();
}