QT读取bin文件

QT 读取 bin 文件

书接上回，bootloader 升级都做了，自然要用 QT 实现一下啦

# 选择文件

拿到路径

QString updatafilepath;

void MainWindow::on_pushButton_updata_seletbin_clicked()
{
    QString filename = QFileDialog::getOpenFileName(
           this,
           tr("请选择升级包的Bin文件"),
           QDir::currentPath(),
           "Bin files (*.bin);;All files(*.*)");
    updatafilepath=getFileInfo(filename);
}

# 获取信息

获得文件基本信息

QString MainWindow::getFileInfo(const QString fileFullName)
{
    QStringList slFileInfo;
    if(!fileFullName.isEmpty())
    {
        QFileInfo fileInfo(fileFullName);

        slFileInfo<< tr("File Path: ") + fileInfo.absolutePath();
        slFileInfo<< tr("File Full Name: ") + fileInfo.fileName();
        ui->textBrowser->append("File Path: "+fileInfo.absolutePath()+"/"+fileInfo.fileName()+"\n");
        //---------------拿到文件的路径-----------------------------------
        updatafilepath=fileInfo.absolutePath()+"/"+fileInfo.fileName();
        ui->lineEdit_updata->setText(updatafilepath);
        //---------------拿到文件的路径-----------------------------------
        slFileInfo<< tr("File Base Name: ") + fileInfo.baseName();
        slFileInfo<< tr("File Type: ") + fileInfo.suffix();
        qint64 size = fileInfo.size();
        size = size / 1024;
        slFileInfo<< tr("File Size: ") + QString::number(size) + "KB";
        ui->textBrowser->append("File Size: "+QString::number(size) + "KB"+"\n");
        QDateTime timeInfo = fileInfo.created();
        slFileInfo<< tr("Create Time: ") + timeInfo.toString("yyyy-MM-dd hh:mm:ss");
        slFileInfo<<   tr("Modifed Time: ") + fileInfo.lastModified().toString("yyyy-MM-dd hh:mm:ss");
        slFileInfo<<  tr("Latest Read: ") + fileInfo.lastRead().toString("yyyy-MM-dd hh:mm:ss");

        QString strInfo = slFileInfo.join('\n');
        QMessageBox::information(this,tr("File Info"),strInfo);
    }
	//读取文件
    OnReadBin(updatafilepath);
    return updatafilepath;
}

# 读取数据

QFile updatafile;
long lastLen,fileLen,sendCnt;
volatile uint8_t myupdatafilepBuf[64*1024];

const int PACKET_SIZE = 768;//每次发送的字节数

void MainWindow::OnReadBin(QString filepathstr)
{
    if(filepathstr==""){
        QMessageBox::information(this, tr("提示消息"), tr("请先选择正确的Bin文件！"), QMessageBox::Ok);
        return;
    }
    QString filePath(filepathstr);
    updatafile.setFileName(filePath);
    QFileInfo fileInfo(filePath);
    //数据信息计算
    fileLen = fileInfo.size();//待发送文件大小
    sendCnt = (int)ceil(fileLen / (PACKET_SIZE * 1.0));//发送次数
    lastLen = fileLen % PACKET_SIZE;//最后一次发送的大小
    if (0 == lastLen) {//恰巧是PACKET_SIZE的整数倍
        lastLen = PACKET_SIZE;
    }
    qDebug() << "fileLen,lastLen,sendCnt:" << fileLen << lastLen << sendCnt;

	//----------------------------读取---------------------------------
    if (updatafile.open(QIODevice::ReadOnly)){
        QDataStream dataStream(&updatafile);
        dataStream.readRawData((char *)myupdatafilepBuf, fileLen);
    }
    updatafile.close();
}

读出来之后就靠大家的发挥啦，我的业务场景是：读出来后拆包，每 768 字节是一包，分包发送给下位机。下位机接收完成后进行升级。