DSP

udp通信笔记（一）

2019-07-13 11:38发布

站内文章 / DSP
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实验环境：Ubuntu14.04，qt5.5.0，dsp板。 实验描述：dsp板会不断发送udp数据包，数据包是float类型的数据。
#ifndef UDPRECEIVER #define UDPRECEIVER #include #include"radardata.h" class QUdpSocket; class UdpReceiver:public QObject { Q_OBJECT public: UdpReceiver(QObject *parent = 0); ~UdpReceiver(); private slots: void processPendingDatagrams(); private: QUdpSocket* udpSocket; QByteArray udppak1; int pNum; RadarData rd; RadarData::Trace tra; }; #endif // UDPRECEIVER #include"udpreceiver.h" #include #include #include UdpReceiver::UdpReceiver(QObject* parent) :QObject(parent) { pNum = 1; udpSocket = new QUdpSocket(this); udpSocket->bind(50000); connect(udpSocket,SIGNAL(readyRead()), this,SLOT(processPendingDatagrams())); } UdpReceiver::~UdpReceiver() { } void UdpReceiver::processPendingDatagrams() { while(udpSocket->hasPendingDatagrams()) { QByteArray datagram; datagram.resize(udpSocket->pendingDatagramSize()); udpSocket->readDatagram(datagram.data(),datagram.size()); if(datagram.size()!=1204) { pNum = 1; continue; } qDebug()<<"receive data: "; if(pNum == 1) { if(datagram.at(0)!=1) { continue; } udppak1 = datagram; pNum = 2; } else if(pNum == 2) { if(datagram.at(0)!=2) { pNum=1; continue; } QTime time; time.start(); datagram.remove(0,4); udppak1.remove(0,4); udppak1.append(datagram); pNum = 1; QDataStream in(&udppak1,QIODevice::ReadOnly); in.setByteOrder(QDataStream::LittleEndian);//重要！读取设置小端模式 in.setFloatingPointPrecision(QDataStream::SinglePrecision);//重要！默认double，float需要设置 in>>rd.targets_num>>rd.type>>rd.version>>rd.curtime; qDebug()<<"tracedata:"<>tra.targetId>>tra.target_time>>tra.r>>tra.ah>>tra.av>>tra. v>>tra. x>>tra. y>>tra. z>>tra. vx>>tra. vy>>tra. vz>>tra. ax>>tra. ay>>tra. az; qDebug()<<"trace:"<


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