An implementation of Analog cellular networks like A-Netz, B-Netz, C-Netz, NMT, AMPS, TACS, JTACS, Radiocom 2000, IMTS, MPT1327, Eurosignal and more http://osmocom-analog.eversberg.eu/
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osmocom-analog/src/libsdr/soapy.c

515 lines
16 KiB

/* SoapySDR device access
*
* (C) 2017 by Andreas Eversberg <jolly@eversberg.eu>
* All Rights Reserved
*
* This program 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 of the License, or
* (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <math.h>
#include <SoapySDR/Device.h>
#include <SoapySDR/Formats.h>
#include "soapy.h"
#include "../libdebug/debug.h"
extern int sdr_rx_overflow;
static SoapySDRDevice *sdr = NULL;
SoapySDRStream *rxStream = NULL;
SoapySDRStream *txStream = NULL;
static int tx_samps_per_buff, rx_samps_per_buff;
static double samplerate;
static uint64_t rx_count = 0;
static uint64_t tx_count = 0;
static int parse_args(SoapySDRKwargs *args, const char *_args_string)
{
char *args_string = strdup(_args_string), *key, *val;
memset(args, 0, sizeof(*args));
while (args_string && *args_string) {
key = args_string;
val = strchr(key, '=');
if (!val) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Error parsing SDR args: No '=' after key\n");
soapy_close();
return -EIO;
}
*val++ = '\0';
args_string = strchr(val, ',');
if (args_string)
*args_string++ = '\0';
PDEBUG(DSOAPY, DEBUG_DEBUG, "SDR device args: key='%s' value='%s'\n", key, val);
SoapySDRKwargs_set(args, key, val);
}
return 0;
}
int soapy_open(size_t channel, const char *_device_args, const char *_stream_args, const char *_tune_args, const char *tx_antenna, const char *rx_antenna, const char *clock_source, double tx_frequency, double rx_frequency, double lo_offset, double rate, double tx_gain, double rx_gain, double bandwidth)
{
double got_frequency, got_rate, got_gain, got_bandwidth;
const char *got_antenna, *got_clock;
size_t num_channels;
SoapySDRKwargs device_args;
SoapySDRKwargs stream_args;
SoapySDRKwargs tune_args;
int rc;
samplerate = rate;
/* parsing ARGS */
PDEBUG(DSOAPY, DEBUG_INFO, "Using device args \"%s\"\n", _device_args);
rc = parse_args(&device_args, _device_args);
if (rc < 0)
return rc;
PDEBUG(DSOAPY, DEBUG_INFO, "Using stream args \"%s\"\n", _stream_args);
rc = parse_args(&stream_args, _stream_args);
if (rc < 0)
return rc;
PDEBUG(DSOAPY, DEBUG_INFO, "Using tune args \"%s\"\n", _tune_args);
rc = parse_args(&tune_args, _tune_args);
if (rc < 0)
return rc;
if (lo_offset) {
char val[32];
snprintf(val, sizeof(val), "%.0f", lo_offset);
val[sizeof(val) - 1] = '\0';
SoapySDRKwargs_set(&tune_args, "OFFSET", val);
}
/* create SoapySDR device */
sdr = SoapySDRDevice_make(&device_args);
if (!sdr) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to create SoapySDR\n");
soapy_close();
return -EIO;
}
/* clock source */
if (clock_source && clock_source[0]) {
if (!strcasecmp(clock_source, "list")) {
char **clocks;
size_t clocks_length;
int i;
clocks = SoapySDRDevice_listClockSources(sdr, &clocks_length);
if (!clocks) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to request list of clock sources!\n");
soapy_close();
return -EIO;
}
if (clocks_length) {
for (i = 0; i < (int)clocks_length; i++)
PDEBUG(DSOAPY, DEBUG_NOTICE, "Clock source: '%s'\n", clocks[i]);
got_clock = SoapySDRDevice_getClockSource(sdr);
PDEBUG(DSOAPY, DEBUG_NOTICE, "Default clock source: '%s'\n", got_clock);
} else
PDEBUG(DSOAPY, DEBUG_NOTICE, "There are no clock sources configurable for this device.\n");
soapy_close();
return 1;
}
if (SoapySDRDevice_setClockSource(sdr, clock_source) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to set clock source to '%s'\n", clock_source);
soapy_close();
return -EIO;
}
got_clock = SoapySDRDevice_getClockSource(sdr);
if (!!strcasecmp(clock_source, got_clock)) {
PDEBUG(DSOAPY, DEBUG_NOTICE, "Given clock source '%s' was accepted, but driver claims to use '%s'\n", clock_source, got_clock);
soapy_close();
return -EINVAL;
}
}
if (rx_frequency) {
/* get number of channels and check if requested channel is in range */
num_channels = SoapySDRDevice_getNumChannels(sdr, SOAPY_SDR_RX);
PDEBUG(DSOAPY, DEBUG_DEBUG, "We have %d RX channel, selecting channel #%d\n", (int)num_channels, (int)channel);
if (channel >= num_channels) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Requested channel #%d (capable of RX) does not exist. Please select channel %d..%d!\n", (int)channel, 0, (int)num_channels - 1);
soapy_close();
return -EIO;
}
/* antenna */
if (rx_antenna && rx_antenna[0]) {
if (!strcasecmp(rx_antenna, "list")) {
char **antennas;
size_t antennas_length;
int i;
antennas = SoapySDRDevice_listAntennas(sdr, SOAPY_SDR_RX, channel, &antennas_length);
if (!antennas) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to request list of RX antennas!\n");
soapy_close();
return -EIO;
}
for (i = 0; i < (int)antennas_length; i++)
PDEBUG(DSOAPY, DEBUG_NOTICE, "RX Antenna: '%s'\n", antennas[i]);
got_antenna = SoapySDRDevice_getAntenna(sdr, SOAPY_SDR_RX, channel);
PDEBUG(DSOAPY, DEBUG_NOTICE, "Default RX Antenna: '%s'\n", got_antenna);
soapy_close();
return 1;
}
if (SoapySDRDevice_setAntenna(sdr, SOAPY_SDR_RX, channel, rx_antenna) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to set RX antenna to '%s'\n", rx_antenna);
soapy_close();
return -EIO;
}
got_antenna = SoapySDRDevice_getAntenna(sdr, SOAPY_SDR_RX, channel);
if (!!strcasecmp(rx_antenna, got_antenna)) {
PDEBUG(DSOAPY, DEBUG_NOTICE, "Given RX antenna '%s' was accepted, but driver claims to use '%s'\n", rx_antenna, got_antenna);
soapy_close();
return -EINVAL;
}
}
/* set rate */
if (SoapySDRDevice_setSampleRate(sdr, SOAPY_SDR_RX, channel, rate) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to set RX rate to %.0f Hz\n", rate);
soapy_close();
return -EIO;
}
/* see what rate actually is */
got_rate = SoapySDRDevice_getSampleRate(sdr, SOAPY_SDR_RX, channel);
if (fabs(got_rate - rate) > 1.0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Given RX rate %.3f Hz is not supported, try %.3f Hz\n", rate, got_rate);
soapy_close();
return -EINVAL;
}
if (rx_gain) {
/* set gain */
if (SoapySDRDevice_setGain(sdr, SOAPY_SDR_RX, channel, rx_gain) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to set RX gain to %.0f\n", rx_gain);
soapy_close();
return -EIO;
}
/* see what gain actually is */
got_gain = SoapySDRDevice_getGain(sdr, SOAPY_SDR_RX, channel);
if (fabs(got_gain - rx_gain) > 0.001) {
PDEBUG(DSOAPY, DEBUG_NOTICE, "Given RX gain %.3f is not supported, we use %.3f\n", rx_gain, got_gain);
rx_gain = got_gain;
}
}
/* hack to make limesdr tune rx to tx */
if (tx_frequency == rx_frequency)
rx_frequency += 1.0;
/* set frequency */
if (SoapySDRDevice_setFrequency(sdr, SOAPY_SDR_RX, channel, rx_frequency, &tune_args) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to set RX frequency to %.0f Hz\n", rx_frequency);
soapy_close();
return -EIO;
}
/* see what frequency actually is */
got_frequency = SoapySDRDevice_getFrequency(sdr, SOAPY_SDR_RX, channel);
if (fabs(got_frequency - rx_frequency) > 100.0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Given RX frequency %.0f Hz is not supported, try %.0f Hz\n", rx_frequency, got_frequency);
soapy_close();
return -EINVAL;
}
/* set bandwidth */
if (SoapySDRDevice_setBandwidth(sdr, SOAPY_SDR_RX, channel, bandwidth) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to set RX bandwidth to %.0f Hz\n", bandwidth);
soapy_close();
return -EIO;
}
/* see what bandwidth actually is */
got_bandwidth = SoapySDRDevice_getBandwidth(sdr, SOAPY_SDR_RX, channel);
if (fabs(got_bandwidth - bandwidth) > 100.0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Given RX bandwidth %.0f Hz is not supported, try %.0f Hz\n", bandwidth, got_bandwidth);
soapy_close();
return -EINVAL;
}
/* set up streamer */
if (SoapySDRDevice_setupStream(sdr, &rxStream, SOAPY_SDR_RX, SOAPY_SDR_CF32, &channel, 1, &stream_args) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to set RX streamer args\n");
soapy_close();
return -EIO;
}
/* get buffer sizes */
rx_samps_per_buff = SoapySDRDevice_getStreamMTU(sdr, rxStream);
if (rx_samps_per_buff == 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to get RX streamer sample buffer\n");
soapy_close();
return -EIO;
}
}
if (tx_frequency) {
/* get number of channels and check if requested channel is in range */
num_channels = SoapySDRDevice_getNumChannels(sdr, SOAPY_SDR_TX);
PDEBUG(DSOAPY, DEBUG_DEBUG, "We have %d TX channel, selecting channel #%d\n", (int)num_channels, (int)channel);
if (channel >= num_channels) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Requested channel #%d (capable of TX) does not exist. Please select channel %d..%d!\n", (int)channel, 0, (int)num_channels - 1);
soapy_close();
return -EIO;
}
/* antenna */
if (tx_antenna && tx_antenna[0]) {
if (!strcasecmp(tx_antenna, "list")) {
char **antennas;
size_t antennas_length;
int i;
antennas = SoapySDRDevice_listAntennas(sdr, SOAPY_SDR_TX, channel, &antennas_length);
if (!antennas) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to request list of TX antennas!\n");
soapy_close();
return -EIO;
}
for (i = 0; i < (int)antennas_length; i++)
PDEBUG(DSOAPY, DEBUG_NOTICE, "TX Antenna: '%s'\n", antennas[i]);
got_antenna = SoapySDRDevice_getAntenna(sdr, SOAPY_SDR_TX, channel);
PDEBUG(DSOAPY, DEBUG_NOTICE, "Default TX Antenna: '%s'\n", got_antenna);
soapy_close();
return 1;
}
if (SoapySDRDevice_setAntenna(sdr, SOAPY_SDR_TX, channel, tx_antenna) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to set TX antenna to '%s'\n", tx_antenna);
soapy_close();
return -EIO;
}
got_antenna = SoapySDRDevice_getAntenna(sdr, SOAPY_SDR_TX, channel);
if (!!strcasecmp(tx_antenna, got_antenna)) {
PDEBUG(DSOAPY, DEBUG_NOTICE, "Given TX antenna '%s' was accepted, but driver claims to use '%s'\n", tx_antenna, got_antenna);
soapy_close();
return -EINVAL;
}
}
/* set rate */
if (SoapySDRDevice_setSampleRate(sdr, SOAPY_SDR_TX, channel, rate) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to set TX rate to %.0f Hz\n", rate);
soapy_close();
return -EIO;
}
/* see what rate actually is */
got_rate = SoapySDRDevice_getSampleRate(sdr, SOAPY_SDR_TX, channel);
if (fabs(got_rate - rate) > 1.0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Given TX rate %.3f Hz is not supported, try %.3f Hz\n", rate, got_rate);
soapy_close();
return -EINVAL;
}
if (tx_gain) {
/* set gain */
if (SoapySDRDevice_setGain(sdr, SOAPY_SDR_TX, channel, tx_gain) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to set TX gain to %.0f\n", tx_gain);
soapy_close();
return -EIO;
}
/* see what gain actually is */
got_gain = SoapySDRDevice_getGain(sdr, SOAPY_SDR_TX, channel);
if (fabs(got_gain - tx_gain) > 0.001) {
PDEBUG(DSOAPY, DEBUG_NOTICE, "Given TX gain %.3f is not supported, we use %.3f\n", tx_gain, got_gain);
tx_gain = got_gain;
}
}
/* set frequency */
if (SoapySDRDevice_setFrequency(sdr, SOAPY_SDR_TX, channel, tx_frequency, &tune_args) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to set TX frequency to %.0f Hz\n", tx_frequency);
soapy_close();
return -EIO;
}
/* see what frequency actually is */
got_frequency = SoapySDRDevice_getFrequency(sdr, SOAPY_SDR_TX, channel);
if (fabs(got_frequency - tx_frequency) > 100.0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Given TX frequency %.0f Hz is not supported, try %.0f Hz\n", tx_frequency, got_frequency);
soapy_close();
return -EINVAL;
}
/* set bandwidth */
if (SoapySDRDevice_setBandwidth(sdr, SOAPY_SDR_TX, channel, bandwidth) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to set TX bandwidth to %.0f Hz\n", bandwidth);
soapy_close();
return -EIO;
}
/* see what bandwidth actually is */
got_bandwidth = SoapySDRDevice_getBandwidth(sdr, SOAPY_SDR_TX, channel);
if (fabs(got_bandwidth - bandwidth) > 100.0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Given TX bandwidth %.0f Hz is not supported, try %.0f Hz\n", bandwidth, got_bandwidth);
soapy_close();
return -EINVAL;
}
/* set up streamer */
if (SoapySDRDevice_setupStream(sdr, &txStream, SOAPY_SDR_TX, SOAPY_SDR_CF32, &channel, 1, &stream_args) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to set TX streamer args\n");
soapy_close();
return -EIO;
}
/* get buffer sizes */
tx_samps_per_buff = SoapySDRDevice_getStreamMTU(sdr, txStream);
if (tx_samps_per_buff == 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to get TX streamer sample buffer\n");
soapy_close();
return -EIO;
}
}
return 0;
}
/* start streaming */
int soapy_start(void)
{
/* enable rx stream */
if (SoapySDRDevice_activateStream(sdr, rxStream, 0, 0, 0) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to issue RX stream command\n");
return -EIO;
}
/* enable tx stream */
if (SoapySDRDevice_activateStream(sdr, txStream, 0, 0, 0) != 0) {
PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to issue TX stream command\n");
return -EIO;
}
return 0;
}
void soapy_close(void)
{
PDEBUG(DSOAPY, DEBUG_DEBUG, "Clean up SoapySDR\n");
if (txStream) {
SoapySDRDevice_deactivateStream(sdr, txStream, 0, 0);
SoapySDRDevice_closeStream(sdr, txStream);
txStream = NULL;
}
if (rxStream) {
SoapySDRDevice_deactivateStream(sdr, rxStream, 0, 0);
SoapySDRDevice_closeStream(sdr, rxStream);
rxStream = NULL;
}
if (sdr) {
SoapySDRDevice_unmake(sdr);
sdr = NULL;
}
}
int soapy_send(float *buff, int num)
{
const void *buffs_ptr[1];
int chunk;
int sent = 0, count;
int flags = 0;
while (num) {
chunk = num;
if (chunk > tx_samps_per_buff)
chunk = tx_samps_per_buff;
/* create tx metadata */
buffs_ptr[0] = buff;
count = SoapySDRDevice_writeStream(sdr, txStream, buffs_ptr, chunk, &flags, 0, 1000000);
if (count <= 0) {
PDEBUG(DUHD, DEBUG_ERROR, "Failed to write to TX streamer (error=%d)\n", count);
break;
}
sent += count;
buff += count * 2;
num -= count;
}
/* increment tx counter */
tx_count += sent;
return sent;
}
/* read what we got, return 0, if buffer is empty, otherwise return the number of samples */
int soapy_receive(float *buff, int max)
{
void *buffs_ptr[1];
int got = 0, count;
long long timeNs;
int flags = 0;
while (1) {
if (max < rx_samps_per_buff) {
/* no more space this time */
sdr_rx_overflow = 1;
break;
}
/* read RX stream */
buffs_ptr[0] = buff;
count = SoapySDRDevice_readStream(sdr, rxStream, buffs_ptr, rx_samps_per_buff, &flags, &timeNs, 0);
if (count > 0) {
/* commit received data to buffer */
got += count;
buff += count * 2;
max -= count;
} else {
/* got nothing this time */
break;
}
}
/* update current rx time */
rx_count += got;
return got;
}
/* estimate number of samples that can be sent */
int soapy_get_tosend(int latspl)
{
int tosend;
/* we need the rx time stamp to determine how much data is already sent in advance */
if (rx_count == 0)
return 0;
/* if we have not yet sent any data, we set initial tx time stamp */
if (tx_count == 0)
tx_count = rx_count;
/* we check how advance our transmitted time stamp is */
tosend = latspl - (tx_count - rx_count);
/* in case of underrun: */
if (tosend > latspl) {
// It is normal that we have underruns, prior initial filling of buffer.
// FIXME: better solution to detect underrun
// PDEBUG(DSOAPY, DEBUG_ERROR, "SDR TX underrun!\n");
tosend = 0;
tx_count = rx_count;
}
if (tosend < 0)
tosend = 0;
return tosend;
}