QT实现串口的十六进制发送

本文主要是介绍QT实现串口的十六进制发送，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

void MainWindow ::on_pushBUtton_clicked () //发送数据

        QString strTXData;

        QByteArray hexdata;

       // strTXData = ui->lineEdit->text().toAscii();//txTextEdit

        strTXData = ui->txTextEdit->toPlainText().toAscii();

        if(ui->txHexcheckBox->isChecked()==true)

            QByteArray temp;

                QString strHex;

            //count1=stringToHex(strTXData,hexdata);

            stringToHex(strTXData,hexdata);

            myCom->write(hexdata);

            temp =hexdata;

            QDataStream out(&temp,QIODevice::ReadWrite);//将字节数组读入

            while(!out.atEnd()) {

                qint8 outChar = 0;

                out >> outChar;//每字节填充一次,直到结束

                QString str = QString("%1").arg(outChar&0xFF, 2, 16, QLatin1Char('0'));//十六进制的转换

                count1++;

                strHex += str;

            ui->TxlineEdit->setText(QString::number(count1));

……………………………………………………

int MainWindow::stringToHex(QString str,QByteArray &senddata)
{
    int hexdata,lowhexdata;
        int hexdatalen = 0;
        int len = str.length();
        senddata.resize(len/2);//
        char lstr,hstr;
        str[len]=' ';
        for(int i=0; i<len; )
        {
            hstr=str[i].toAscii();
            //if(hstr == 0x0a)
             //   continue;
            i++;
            lstr=str[i].toAscii();
            if(lstr == ' ')
            {
                lstr=hstr;
                hstr='0';
                i++;
            }
            else
            {
                i++;
                if(str[i]!=' ')
                {
                }
                else
                {
                    i++;
                }
            }
            if(i >= len+2)
               break;
            hexdata = ConverToHexChar(hstr);
            lowhexdata = ConverToHexChar(lstr);
            if((hexdata == 16) || (lowhexdata == 16))
                break;
           else
               hexdata = hexdata*16+lowhexdata;
            senddata[hexdatalen] = (char)hexdata;
            hexdatalen++;
        }
        senddata.resize(hexdatalen);
        return hexdatalen;
}
char MainWindow::ConverToHexChar(char ch)
{
    if((ch >= '0') && (ch <= '9'))
            return ch-0x30;
        else if((ch >= 'A') && (ch <= 'F'))
            return ch-'A'+10;
        else if((ch >= 'a') && (ch <= 'f'))
            return ch-'a'+10;
        else return (-1);
}