qt串口

最新推荐文章于 2025-02-25 00:00:00 发布

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最新推荐文章于 2025-02-25 00:00:00 发布

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分类专栏： qt

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https://blog.youkuaiyun.com/weixin_42837024/article/details/81669540
https://www.cnblogs.com/hysea2019/p/10972543.html


char get_hex_char(const 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 ch -  ch;
}



void string_to_hex(const QString& str, QByteArray& send_data)
{
    int hexdata,lowhexdata;
    int hexdatalen = 0;
    int len = str.length();
    send_data.resize(len / 2);
    char lstr,hstr;
    for(int i = 0; i < len; )
    {
        hstr = str[i].toLatin1();
        if( hstr == ' ' )
        {
            ++i;
            continue;
        }
        ++i;
        if( i  >= len ) break;
        lstr = str[i].toLatin1();
        hexdata = get_hex_char(hstr);
        lowhexdata = get_hex_char(lstr);
        if( (hexdata == 16) || (lowhexdata == 16) )
            break;
        else
            hexdata = hexdata*16 + lowhexdata;
        ++i;
        send_data[hexdatalen] = (char)hexdata;
        ++hexdatalen;
    }
    send_data.resize(hexdatalen);
}