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USRP driver improvements.

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Set bit size to be 16 for interpolators and decimators.
Match buffer size to UHD.
Don't destroy TX stream, as there appears to be a bug when recreating it.
Catch exception when checking for TX underflow.
Increase RX FIFO size, to reduce overflows at high sample rates.
Allow RX to continue streaming after receiving timeout.
This commit is contained in:
Jon Beniston
2020-10-23 13:12:37 +01:00
parent 8b05670814
commit 209be94947
9 changed files with 115 additions and 59 deletions
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plugins/samplesource/usrpinput/usrpinputthread.h
+5 -3
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@@ -36,7 +36,7 @@ class USRPInputThread : public QThread, public DeviceUSRPShared::ThreadInterface
Q_OBJECT
public:
USRPInputThread(uhd::rx_streamer::sptr stream, SampleSinkFifo* sampleFifo, QObject* parent = 0);
USRPInputThread(uhd::rx_streamer::sptr stream, size_t bufSamples, SampleSinkFifo* sampleFifo, QObject* parent = 0);
~USRPInputThread();
virtual void startWork();
@@ -45,6 +45,7 @@ public:
virtual bool isRunning() { return m_running; }
void setLog2Decimation(unsigned int log2_decim);
void getStreamStatus(bool& active, quint32& overflows, quint32& m_timeouts);
void issueStreamCmd(bool start);
private:
QMutex m_startWaitMutex;
@@ -56,13 +57,14 @@ private:
quint32 m_timeouts;
uhd::rx_streamer::sptr m_stream;
qint16 m_buf[2*DeviceUSRP::blockSize]; //must hold I+Q values of each sample hence 2xcomplex size
qint16 *m_buf;
size_t m_bufSamples;
SampleVector m_convertBuffer;
SampleSinkFifo* m_sampleFifo;
unsigned int m_log2Decim; // soft decimation
Decimators<qint32, qint16, SDR_RX_SAMP_SZ, 12, true> m_decimatorsIQ;
Decimators<qint32, qint16, SDR_RX_SAMP_SZ, 16, true> m_decimatorsIQ;
void run();
void callbackIQ(const qint16* buf, qint32 len);