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gr-osmosdr/lib/bladerf/bladerf_sink_c.cc

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/* -*- c++ -*- */
/*
* Copyright 2013 Nuand LLC
* Copyright 2013 Dimitri Stolnikov <horiz0n@gmx.net>
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
/*
* config.h is generated by configure. It contains the results
* of probing for features, options etc. It should be the first
* file included in your .cc file.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <iostream>
#include <boost/assign.hpp>
#include <boost/format.hpp>
#include <boost/lexical_cast.hpp>
#include <gnuradio/io_signature.h>
#include "arg_helpers.h"
#include "bladerf_sink_c.h"
#define NUM_BUFFERS 32
#define NUM_SAMPLES_PER_BUFFER 4096
using namespace boost::assign;
/*
* Create a new instance of bladerf_source_c and return
* a boost shared_ptr. This is effectively the public constructor.
*/
bladerf_sink_c_sptr make_bladerf_sink_c (const std::string &args)
{
return gnuradio::get_initial_sptr(new bladerf_sink_c (args));
}
/*
* Specify constraints on number of input and output streams.
* This info is used to construct the input and output signatures
* (2nd & 3rd args to gr_block's constructor). The input and
* output signatures are used by the runtime system to
* check that a valid number and type of inputs and outputs
* are connected to this block. In this case, we accept
* only 0 input and 1 output.
*/
static const int MIN_IN = 1; // mininum number of input streams
static const int MAX_IN = 1; // maximum number of input streams
static const int MIN_OUT = 0; // minimum number of output streams
static const int MAX_OUT = 0; // maximum number of output streams
/*
* The private constructor
*/
bladerf_sink_c::bladerf_sink_c (const std::string &args)
: gr::sync_block ("bladerf_sink_c",
gr::io_signature::make (MIN_IN, MAX_IN, sizeof (gr_complex)),
gr::io_signature::make (MIN_OUT, MAX_OUT, sizeof (gr_complex)))
{
int ret;
unsigned int device_number = 0;
std::string device_name;
dict_t dict = params_to_dict(args);
if (dict.count("bladerf"))
{
std::string value = dict["bladerf"];
if ( value.length() )
{
try {
device_number = boost::lexical_cast< unsigned int >( value );
} catch ( std::exception &ex ) {
throw std::runtime_error(
"Failed to use '" + value + "' as device number: " + ex.what());
}
}
}
device_name = boost::str(boost::format( "libusb:instance=%d" ) % device_number);
/* Open a handle to the device */
ret = bladerf_open( &_dev, device_name.c_str() );
if ( ret != 0 ) {
throw std::runtime_error( std::string(__FUNCTION__) + " " +
"failed to open bladeRF device " + device_name );
}
if (dict.count("fw"))
{
std::string fw = dict["fw"];
std::cerr << "Flashing firmware image " << fw << "..., DO NOT INTERRUPT!"
<< std::endl;
ret = bladerf_flash_firmware( _dev, fw.c_str() );
if ( ret != 0 )
std::cerr << "bladerf_flash_firmware has failed with " << ret << std::endl;
else
std::cerr << "The firmware has been successfully flashed." << std::endl;
}
if (dict.count("fpga"))
{
std::string fpga = dict["fpga"];
std::cerr << "Loading FPGA bitstream " << fpga << "..." << std::endl;
ret = bladerf_load_fpga( _dev, fpga.c_str() );
if ( ret != 0 && ret != 1 )
std::cerr << "bladerf_load_fpga has failed with " << ret << std::endl;
else
std::cerr << "The FPGA bitstream has been successfully loaded." << std::endl;
}
std::cerr << "Using nuand LLC bladeRF #" << device_number;
char serial[BLADERF_SERIAL_LENGTH];
if ( bladerf_get_serial( _dev, serial ) == 0 )
std::cerr << " SN " << serial;
struct bladerf_version ver;
if ( bladerf_fw_version( _dev, &ver ) == 0 )
std::cerr << " FW v" << ver.major << "." << ver.minor << "." << ver.patch;
if ( bladerf_fpga_version( _dev, &ver ) == 0 )
std::cerr << " FPGA v" << ver.major << "." << ver.minor << "." << ver.patch;
std::cerr << std::endl;
if ( bladerf_is_fpga_configured( _dev ) != 1 )
{
std::ostringstream oss;
oss << "The FPGA is not configured! "
<< "Provide device argument fpga=/path/to/the/bitstream.rbf to load it.";
throw std::runtime_error( oss.str() );
}
/* Set the range of VGA1, VGA1GAINT[7:0] */
_vga1_range = osmosdr::gain_range_t( -35, -4, 1 );
/* Set the range of VGA2, VGA2GAIN[4:0] */
_vga2_range = osmosdr::gain_range_t( 0, 25, 1 );
_num_buffers = _samples_per_buffer = 0;
/* Initialize buffer and sample configuration */
if (dict.count("buffers")) {
_num_buffers = boost::lexical_cast< size_t >( dict["buffers"] );
}
if (dict.count("buflen")) {
_samples_per_buffer = boost::lexical_cast< size_t >( dict["buflen"] );
}
unsigned int transfers = 0;
if (dict.count("transfers")) {
transfers = boost::lexical_cast< size_t >( dict["transfers"] );
}
/* Require value to be >= 2 so we can ensure we have twice as many
* buffers as transfers */
if (_num_buffers <= 1) {
_num_buffers = NUM_BUFFERS;
}
if (0 == _samples_per_buffer) {
_samples_per_buffer = NUM_SAMPLES_PER_BUFFER;
} else {
/* For SC16_Q12, 1 sample = 2 int16_t's */
_samples_per_buffer /= 2 * sizeof(int16_t);
if (_samples_per_buffer < 1024 || _samples_per_buffer % 1024 != 0)
_samples_per_buffer = NUM_SAMPLES_PER_BUFFER;
}
if (transfers == 0 || transfers > (_num_buffers / 2)) {
transfers = _num_buffers / 2;
}
/* Initialize the stream */
ret = bladerf_init_stream( &_stream, _dev, stream_callback,
&_buffers, _num_buffers, BLADERF_FORMAT_SC16_Q12,
_samples_per_buffer, transfers, this );
if ( ret != 0 )
std::cerr << "bladerf_init_stream has failed with " << ret << std::endl;
/* Initialize buffer management */
_buf_index = _next_to_tx = 0;
_next_value = static_cast<int16_t*>(_buffers[0]);
_samples_left = _samples_per_buffer;
_filled = new bool[_num_buffers];
if (!_filled) {
throw std::runtime_error( std::string(__FUNCTION__) + ": " +
"Failed to allocate _filled[]");
}
for (size_t i = 0; i < _num_buffers; ++i) {
_filled[i] = false;
}
ret = bladerf_enable_module( _dev, BLADERF_MODULE_TX, true );
if ( ret != 0 )
std::cerr << "bladerf_enable_module has failed with " << ret << std::endl;
set_running( true );
_thread = gr::thread::thread( boost::bind(&bladerf_sink_c::write_task, this) );
}
/*
* Our virtual destructor.
*/
bladerf_sink_c::~bladerf_sink_c ()
{
int ret;
set_running(false);
/* Ensure work() or callbacks return from wait() calls */
_buf_status_lock.lock();
_samp_avail.notify_all();
_buffer_emptied.notify_all();
_buf_status_lock.unlock();
_thread.join();
ret = bladerf_enable_module( _dev, BLADERF_MODULE_TX, false );
if ( ret != 0 )
std::cerr << "bladerf_enable_module has failed with " << ret << std::endl;
/* Release stream resources */
bladerf_deinit_stream(_stream);
/* Close the device */
bladerf_close( _dev );
delete[] _filled;
}
void *bladerf_sink_c::stream_callback( struct bladerf *dev,
struct bladerf_stream *stream,
struct bladerf_metadata *metadata,
void *samples,
size_t num_samples,
void *user_data )
{
bladerf_sink_c *obj = (bladerf_sink_c *) user_data;
return obj->get_next_buffer( samples, num_samples );
}
static size_t buffer2index(void **buffers, void *current, size_t num_buffers)
{
for (size_t i = 0; i < num_buffers; ++i) {
if (static_cast<char*>(current) == static_cast<char*>(buffers[i]))
return i;
}
throw std::runtime_error( std::string(__FUNCTION__) + " " +
"Has hit unexpected condition");
}
/* Fetch the next full buffer to pass down to the device */
void *bladerf_sink_c::get_next_buffer( void *samples, size_t num_samples)
{
void *ret;
bool running;
{
boost::unique_lock<boost::mutex> lock(_buf_status_lock);
/* Mark the incoming buffer empty and notify work() */
if (samples) {
size_t buffer_emptied_index = buffer2index(_buffers, samples, _num_buffers);
_filled[buffer_emptied_index] = false;
_buffer_emptied.notify_one();
}
/* Wait for our next buffer to become filled */
while ((running = is_running()) && !_filled[_next_to_tx]) {
_samp_avail.wait(lock);
}
if (running) {
ret = _buffers[_next_to_tx];
_next_to_tx = (_next_to_tx + 1) % _num_buffers;
} else {
ret = NULL;
}
}
return ret;
}
void bladerf_sink_c::write_task()
{
int status;
/* Start stream and stay there until we kill the stream */
status = bladerf_stream(_stream, BLADERF_MODULE_TX);
if (status < 0)
std::cerr << "Sink stream error: " << bladerf_strerror(status) << std::endl;
set_running( false );
}
int bladerf_sink_c::work( int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items )
{
const gr_complex *in = (const gr_complex *) input_items[0];
int num_samples;
bool running = is_running();
/* Total samples we want to process */
num_samples = noutput_items;
/* While there are still samples to copy out ... */
while (running && num_samples > 0) {
while (_samples_left && num_samples) {
/* Scale and sign extend I and then Q */
*_next_value = (int16_t)(real(*in) * 2000);
_next_value++;
*_next_value = (int16_t)(imag(*in) * 2000);
_next_value++;
/* Advance to next sample */
in++;
num_samples--;
_samples_left--;
}
/* Advance to the next buffer if the current one is filled */
if (_samples_left == 0) {
{
boost::unique_lock<boost::mutex> lock(_buf_status_lock);
_filled[_buf_index] = true;
_buf_index = (_buf_index + 1) % _num_buffers;
_next_value = static_cast<int16_t*>(_buffers[_buf_index]);
_samples_left = _samples_per_buffer;
/* Signal that we have filled a buffer */
_samp_avail.notify_one();
/* Wait here if the next buffer isn't full. The callback will
* signal us when it has freed up a buffer */
while (_filled[_buf_index] && running) {
_buffer_emptied.wait(lock);
running = is_running();
}
}
}
}
return running ? noutput_items : 0;
}
std::vector<std::string> bladerf_sink_c::get_devices()
{
return bladerf_common::devices();
}
size_t bladerf_sink_c::get_num_channels()
{
/* We only support a single channel for each bladeRF */
return 1;
}
osmosdr::meta_range_t bladerf_sink_c::get_sample_rates()
{
return sample_rates();
}
double bladerf_sink_c::set_sample_rate(double rate)
{
int ret;
uint32_t actual;
/* Set the Si5338 to be 2x this sample rate */
/* Check to see if the sample rate is an integer */
if( (uint32_t)round(rate) == (uint32_t)rate )
{
ret = bladerf_set_sample_rate( _dev, BLADERF_MODULE_TX, (uint32_t)rate, &actual );
if( ret ) {
throw std::runtime_error( std::string(__FUNCTION__) + " " +
"has failed to set integer rate, error " +
boost::lexical_cast<std::string>(ret) );
}
} else {
/* TODO: Fractional sample rate */
ret = bladerf_set_sample_rate( _dev, BLADERF_MODULE_TX, (uint32_t)rate, &actual );
if( ret ) {
throw std::runtime_error( std::string(__FUNCTION__) + " " +
"has failed to set fractional rate, error " +
boost::lexical_cast<std::string>(ret) );
}
}
return get_sample_rate();
}
double bladerf_sink_c::get_sample_rate()
{
int ret;
unsigned int rate = 0;
ret = bladerf_get_sample_rate( _dev, BLADERF_MODULE_TX, &rate );
if( ret ) {
throw std::runtime_error( std::string(__FUNCTION__) + " " +
"has failed to get sample rate, error " +
boost::lexical_cast<std::string>(ret) );
}
return (double)rate;
}
osmosdr::freq_range_t bladerf_sink_c::get_freq_range( size_t chan )
{
return freq_range();
}
double bladerf_sink_c::set_center_freq( double freq, size_t chan )
{
int ret;
/* Check frequency range */
if( freq < get_freq_range( chan ).start() ||
freq > get_freq_range( chan ).stop() ) {
std::cerr << "Failed to set out of bound frequency: " << freq << std::endl;
} else {
ret = bladerf_set_frequency( _dev, BLADERF_MODULE_TX, (uint32_t)freq );
if( ret ) {
throw std::runtime_error( std::string(__FUNCTION__) + " " +
"failed to set center frequency " +
boost::lexical_cast<std::string>(freq) +
", error " +
boost::lexical_cast<std::string>(ret) );
}
}
return get_center_freq( chan );
}
double bladerf_sink_c::get_center_freq( size_t chan )
{
uint32_t freq;
int ret;
ret = bladerf_get_frequency( _dev, BLADERF_MODULE_TX, &freq );
if( ret ) {
throw std::runtime_error( std::string(__FUNCTION__) + " " +
"failed to get center frequency, error " +
boost::lexical_cast<std::string>(ret) );
}
return (double)freq;
}
double bladerf_sink_c::set_freq_corr( double ppm, size_t chan )
{
/* TODO: Write the VCTCXO with a correction value (also changes RX ppm value!) */
return get_freq_corr( chan );
}
double bladerf_sink_c::get_freq_corr( size_t chan )
{
/* TODO: Return back the frequency correction in ppm */
return 0;
}
std::vector<std::string> bladerf_sink_c::get_gain_names( size_t chan )
{
std::vector< std::string > names;
names += "VGA1", "VGA2";
return names;
}
osmosdr::gain_range_t bladerf_sink_c::get_gain_range( size_t chan )
{
/* TODO: This is an overall system gain range. Given the VGA1 and VGA2
how much total gain can we have in the system */
return get_gain_range( "VGA2", chan ); /* we use only VGA2 here for now */
}
osmosdr::gain_range_t bladerf_sink_c::get_gain_range( const std::string & name, size_t chan )
{
osmosdr::gain_range_t range;
if( name == "VGA1" ) {
range = _vga1_range;
} else if( name == "VGA2" ) {
range = _vga2_range;
} else {
throw std::runtime_error( std::string(__FUNCTION__) + " " +
"requested an invalid gain element " + name );
}
return range;
}
bool bladerf_sink_c::set_gain_mode( bool automatic, size_t chan )
{
return false;
}
bool bladerf_sink_c::get_gain_mode( size_t chan )
{
return false;
}
double bladerf_sink_c::set_gain( double gain, size_t chan )
{
return set_gain( gain, "VGA2", chan ); /* we use only VGA2 here for now */
}
double bladerf_sink_c::set_gain( double gain, const std::string & name, size_t chan)
{
int ret = 0;
if( name == "VGA1" ) {
ret = bladerf_set_txvga1( _dev, (int)gain );
} else if( name == "VGA2" ) {
ret = bladerf_set_txvga2( _dev, (int)gain );
} else {
throw std::runtime_error( std::string(__FUNCTION__) + " " +
"requested to set the gain "
"of an unknown gain element " + name );
}
/* Check for errors */
if( ret ) {
throw std::runtime_error( std::string(__FUNCTION__) + " " +
"could not set " + name + " gain, error " +
boost::lexical_cast<std::string>(ret) );
}
return get_gain( name, chan );
}
double bladerf_sink_c::get_gain( size_t chan )
{
return get_gain( "VGA2", chan ); /* we use only VGA2 here for now */
}
double bladerf_sink_c::get_gain( const std::string & name, size_t chan )
{
int g;
int ret = 0;
if( name == "VGA1" ) {
ret = bladerf_get_txvga1( _dev, &g );
} else if( name == "VGA2" ) {
ret = bladerf_get_txvga2( _dev, &g );
} else {
throw std::runtime_error( std::string(__FUNCTION__) + " " +
"requested to get the gain "
"of an unknown gain element " + name );
}
/* Check for errors */
if( ret ) {
throw std::runtime_error( std::string(__FUNCTION__) + " " +
"could not get " + name + " gain, error " +
boost::lexical_cast<std::string>(ret) );
}
return (double)g;
}
double bladerf_sink_c::set_bb_gain( double gain, size_t chan )
{
/* for TX, only VGA1 is in the BB path */
osmosdr::gain_range_t bb_gains = get_gain_range( "VGA1", chan );
double clip_gain = bb_gains.clip( gain, true );
gain = set_gain( clip_gain, "VGA1", chan );
return gain;
}
std::vector< std::string > bladerf_sink_c::get_antennas( size_t chan )
{
std::vector< std::string > antennas;
antennas += get_antenna( chan );
return antennas;
}
std::string bladerf_sink_c::set_antenna( const std::string & antenna, size_t chan )
{
return get_antenna( chan );
}
std::string bladerf_sink_c::get_antenna( size_t chan )
{
/* We only have a single transmit antenna here */
return "TX";
}
double bladerf_sink_c::set_bandwidth( double bandwidth, size_t chan )
{
int ret;
uint32_t actual;
if ( bandwidth == 0.0 ) /* bandwidth of 0 means automatic filter selection */
bandwidth = get_sample_rate() * 0.75; /* select narrower filters to prevent aliasing */
ret = bladerf_set_bandwidth( _dev, BLADERF_MODULE_TX, (uint32_t)bandwidth, &actual );
if( ret ) {
throw std::runtime_error( std::string(__FUNCTION__) + " " +
"could not set bandwidth, error " +
boost::lexical_cast<std::string>(ret) );
}
return get_bandwidth();
}
double bladerf_sink_c::get_bandwidth( size_t chan )
{
uint32_t bandwidth;
int ret;
ret = bladerf_get_bandwidth( _dev, BLADERF_MODULE_TX, &bandwidth );
if( ret ) {
throw std::runtime_error( std::string(__FUNCTION__) + " " +
"could not get bandwidth, error " +
boost::lexical_cast<std::string>(ret) );
}
return (double)bandwidth;
}
osmosdr::freq_range_t bladerf_sink_c::get_bandwidth_range( size_t chan )
{
return filter_bandwidths();
}
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