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PlutoSDR input: corrected I/Q loop processing as interleaved and not I/Q sample block

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This commit is contained in:
f4exb 2017-09-10 16:58:48 +02:00
parent 6a229bef10
commit ccb1563299
4 changed files with 61 additions and 19 deletions
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28
devices/plutosdr/deviceplutosdrbox.cpp
View File

@ -41,6 +41,14 @@ DevicePlutoSDRBox::DevicePlutoSDRBox(const std::string& uri) :
if (m_valid) {
getXO();
setTracking();
// int nb_channels = iio_device_get_channels_count(m_devRx);
// for (int i = 0; i < nb_channels; i++) {
// iio_channel_disable(iio_device_get_channel(m_devRx, i));
// }
// nb_channels = iio_device_get_channels_count(m_devTx);
// for (int i = 0; i < nb_channels; i++) {
// iio_channel_disable(iio_device_get_channel(m_devTx, i));
// }
}
}
@ -213,6 +221,16 @@ bool DevicePlutoSDRBox::openRx()
if (m_chnRx0) {
iio_channel_enable(m_chnRx0);
const struct iio_data_format *df = iio_channel_get_data_format(m_chnRx0);
qDebug("DevicePlutoSDRBox::openRx: length: %u bits: %u shift: %u signed: %s be: %s with_scale: %s scale: %lf repeat: %u",
df->length,
df->bits,
df->shift,
df->is_signed ? "true" : "false",
df->is_be ? "true" : "false",
df->with_scale? "true" : "false",
df->scale,
df->repeat);
return true;
} else {
std::cerr << "DevicePlutoSDRBox::openRx: failed" << std::endl;
@ -228,6 +246,16 @@ bool DevicePlutoSDRBox::openTx()
if (m_chnTx0) {
iio_channel_enable(m_chnTx0);
const struct iio_data_format *df = iio_channel_get_data_format(m_chnTx0);
qDebug("DevicePlutoSDRBox::openTx: length: %u bits: %u shift: %u signed: %s be: %s with_scale: %s scale: %lf repeat: %u",
df->length,
df->bits,
df->shift,
df->is_signed ? "true" : "false",
df->is_be ? "true" : "false",
df->with_scale? "true" : "false",
df->scale,
df->repeat);
return true;
} else {
std::cerr << "DevicePlutoSDRBox::openTx: failed" << std::endl;

8
plugins/samplesource/plutosdrinput/plutosdrinput.cpp
View File

@ -26,7 +26,7 @@
#include "plutosdrinput.h"
#include "plutosdrinputthread.h"
#define PLUTOSDR_BLOCKSIZE (128*1024) //complex samples per buffer (must be multiple of 64)
#define PLUTOSDR_BLOCKSIZE_SAMPLES (128*1024) //complex samples per buffer (must be multiple of 64)
MESSAGE_CLASS_DEFINITION(PlutoSDRInput::MsgConfigurePlutoSDR, Message)
MESSAGE_CLASS_DEFINITION(PlutoSDRInput::MsgFileRecord, Message)
@ -70,7 +70,7 @@ bool PlutoSDRInput::start()
// start / stop streaming is done in the thread.
if ((m_plutoSDRInputThread = new PlutoSDRInputThread(PLUTOSDR_BLOCKSIZE, m_deviceShared.m_deviceParams->getBox(), &m_sampleFifo)) == 0)
if ((m_plutoSDRInputThread = new PlutoSDRInputThread(PLUTOSDR_BLOCKSIZE_SAMPLES, m_deviceShared.m_deviceParams->getBox(), &m_sampleFifo)) == 0)
{
qFatal("PlutoSDRInput::start: cannot create thread");
stop();
@ -153,7 +153,7 @@ bool PlutoSDRInput::handleMessage(const Message& message)
bool PlutoSDRInput::openDevice()
{
if (!m_sampleFifo.setSize(PLUTOSDR_BLOCKSIZE))
if (!m_sampleFifo.setSize(PLUTOSDR_BLOCKSIZE_SAMPLES))
{
qCritical("PlutoSDRInput::openDevice: could not allocate SampleFifo");
return false;
@ -198,7 +198,7 @@ bool PlutoSDRInput::openDevice()
// acquire the channel
DevicePlutoSDRBox *plutoBox = m_deviceShared.m_deviceParams->getBox();
plutoBox->openRx();
m_plutoRxBuffer = plutoBox->createRxBuffer(PLUTOSDR_BLOCKSIZE, false);
m_plutoRxBuffer = plutoBox->createRxBuffer(PLUTOSDR_BLOCKSIZE_SAMPLES*2, false); // PlutoSDR buffer size is counted in number of I or Q samples not the combination
return true;
}

35
plugins/samplesource/plutosdrinput/plutosdrinputthread.cpp
View File

@ -18,19 +18,22 @@
#include "plutosdrinputsettings.h"
#include "plutosdrinputthread.h"
PlutoSDRInputThread::PlutoSDRInputThread(uint32_t blocksize, DevicePlutoSDRBox* plutoBox, SampleSinkFifo* sampleFifo, QObject* parent) :
#include "iio.h"
PlutoSDRInputThread::PlutoSDRInputThread(uint32_t blocksizeSamples, DevicePlutoSDRBox* plutoBox, SampleSinkFifo* sampleFifo, QObject* parent) :
QThread(parent),
m_running(false),
m_plutoBox(plutoBox),
m_blockSize(blocksize),
m_convertBuffer(blocksize),
m_sampleFifo(sampleFifo),
m_blockSizeSamples(blocksizeSamples),
m_convertBuffer(blocksizeSamples),
m_convertIt(m_convertBuffer.begin()),
m_sampleFifo(sampleFifo),
m_log2Decim(0),
m_fcPos(PlutoSDRInputSettings::FC_POS_CENTER),
m_phasor(0)
{
m_buf = new qint16[blocksize*(sizeof(Sample)/sizeof(qint16))];
m_buf = new qint16[blocksizeSamples*(sizeof(Sample)/sizeof(qint16))];
m_bufConv = new qint16[blocksizeSamples*(sizeof(Sample)/sizeof(qint16))];
}
PlutoSDRInputThread::~PlutoSDRInputThread()
@ -78,7 +81,7 @@ void PlutoSDRInputThread::run()
ssize_t nbytes_rx;
char *p_dat, *p_end;
std::ptrdiff_t p_inc;
int is;
int ihs; // half sample index (I then Q to make a sample)
// Refill RX buffer
nbytes_rx = m_plutoBox->rxBufferRefill();
@ -87,16 +90,26 @@ void PlutoSDRInputThread::run()
// READ: Get pointers to RX buf and read IQ from RX buf port 0
p_inc = m_plutoBox->rxBufferStep();
p_end = m_plutoBox->rxBufferEnd();
is = 0;
ihs = 0;
// qDebug("PlutoSDRInputThread::run: %ld samples read step: %ld", nbytes_rx / p_inc, p_inc);
// p_inc is 2 on a char* buffer therefore each iteration processes only the I or Q sample
// I and Q samples are processed one at a time
// conversion is not needed as samples are little endian
for (p_dat = m_plutoBox->rxBufferFirst(); p_dat < p_end; p_dat += p_inc)
{
memcpy(&m_buf[2*is], p_dat, 2*sizeof(int16_t));
is++;
// m_buf[2*is] = ((int16_t *) p_dat)[0];
// m_buf[2*is+1] = ((int16_t *) p_dat)[1];
// memcpy(&m_buf[2*ihs], p_dat, 2*sizeof(int16_t));
m_buf[ihs] = *((int16_t *) p_dat);
// iio_channel_convert(m_plutoBox->getRxChannel0(), (void *) &m_bufConv[2*ihs], (const void *) &m_buf[2*ihs]);
// iio_channel_convert(m_plutoBox->getRxChannel0(), (void *) &m_bufConv[ihs], (const void *) &m_buf[ihs]);
ihs++;
}
//m_sampleFifo->write((unsigned char *) m_buf, is*2*sizeof(int16_t));
convert(m_buf, 2 * m_blockSize);
m_sampleFifo->write((unsigned char *) m_buf, ihs*sizeof(int16_t));
//convert(m_bufConv, 2 * m_blockSize);
}
m_running = false;

9
plugins/samplesource/plutosdrinput/plutosdrinputthread.h
View File

@ -48,11 +48,12 @@ private:
bool m_running;
DevicePlutoSDRBox *m_plutoBox;
int16_t *m_buf; // holds I+Q values of each sample
uint32_t m_blockSize;
SampleVector m_convertBuffer;
SampleSinkFifo* m_sampleFifo;
int16_t *m_buf; //!< holds I+Q values of each sample from devce
int16_t *m_bufConv; //!< holds I+Q values of each sample converted to host format via iio_channel_convert
uint32_t m_blockSizeSamples; //!< buffer sizes in number of (I,Q) samples
SampleVector m_convertBuffer; //!< vector of (I,Q) samples used for decimation and scaling conversion
SampleVector::iterator m_convertIt;
SampleSinkFifo* m_sampleFifo; //!< DSP sample FIFO (I,Q)
unsigned int m_log2Decim; // soft decimation
int m_fcPos;