QT实现串口的十六进制发送



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);

}