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authorAndreas Eversberg <jolly@eversberg.eu>2017-11-17 22:51:18 +0100
committerAndreas Eversberg <jolly@eversberg.eu>2017-12-03 08:45:45 +0100
commit1650cc5ad2eba4fb8857ffc920170ae0f9f1a18d (patch)
tree8af7057e2205de7548c70998c46e5ede8eabbad4 /src/libsdr
parent45a5568f7032b11953d6ac4321970d5780eaf613 (diff)
Restructure: Move sdr from common code to 'libsdr'
Diffstat (limited to 'src/libsdr')
-rw-r--r--src/libsdr/Makefile.am26
-rw-r--r--src/libsdr/display_iq.c280
-rw-r--r--src/libsdr/display_spectrum.c292
-rw-r--r--src/libsdr/sdr.c865
-rw-r--r--src/libsdr/sdr.h8
-rw-r--r--src/libsdr/sdr_config.c262
-rw-r--r--src/libsdr/sdr_config.h32
-rw-r--r--src/libsdr/soapy.c468
-rw-r--r--src/libsdr/soapy.h8
-rw-r--r--src/libsdr/uhd.c585
-rw-r--r--src/libsdr/uhd.h8
11 files changed, 2834 insertions, 0 deletions
diff --git a/src/libsdr/Makefile.am b/src/libsdr/Makefile.am
new file mode 100644
index 0000000..5a00457
--- /dev/null
+++ b/src/libsdr/Makefile.am
@@ -0,0 +1,26 @@
+AM_CPPFLAGS = -Wall -Wextra -g $(all_includes)
+
+noinst_LIBRARIES = libsdr.a
+
+libsdr_a_SOURCES = \
+dd sdr_config.c \
+ sdr.c \
+ display_iq.c \
+ display_spectrum.c
+
+AM_CPPFLAGS += -DHAVE_SDR
+
+if HAVE_UHD
+AM_CPPFLAGS += -DHAVE_UHD
+
+libsdr_a_SOURCES += \
+ uhd.c
+endif
+
+if HAVE_SOAPY
+AM_CPPFLAGS += -DHAVE_SOAPY
+
+libsdr_a_SOURCES += \
+ soapy.c
+endif
+
diff --git a/src/libsdr/display_iq.c b/src/libsdr/display_iq.c
new file mode 100644
index 0000000..350d076
--- /dev/null
+++ b/src/libsdr/display_iq.c
@@ -0,0 +1,280 @@
+/* display IQ data form functions
+ *
+ * (C) 2016 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 <stdint.h>
+#include <string.h>
+#include <math.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include "../common/sample.h"
+#include "../common/sender.h"
+
+/* must be odd value! */
+#define SIZE 23
+
+static char screen[SIZE][MAX_DISPLAY_WIDTH];
+static uint8_t screen_color[SIZE][MAX_DISPLAY_WIDTH];
+static uint8_t screen_history[SIZE * 2][MAX_DISPLAY_WIDTH];
+static int iq_on = 0;
+static double db = 80;
+
+static dispiq_t disp;
+
+void display_iq_init(int samplerate)
+{
+ memset(&disp, 0, sizeof(disp));
+ memset(&screen_history, 0, sizeof(screen_history));
+ disp.interval_max = (double)samplerate * DISPLAY_INTERVAL + 0.5;
+ /* should not happen due to low interval */
+ if (disp.interval_max < MAX_DISPLAY_IQ - 1)
+ disp.interval_max = MAX_DISPLAY_IQ - 1;
+}
+
+void display_iq_on(int on)
+{
+ int j;
+ int w, h;
+
+ get_win_size(&w, &h);
+
+ if (iq_on) {
+ memset(&screen, ' ', sizeof(screen));
+ memset(&screen_history, 0, sizeof(screen_history));
+ printf("\0337\033[H");
+ for (j = 0; j < SIZE; j++) {
+ screen[j][w] = '\0';
+ puts(screen[j]);
+ }
+ printf("\0338"); fflush(stdout);
+ }
+
+ if (on < 0) {
+ if (++iq_on == 3)
+ iq_on = 0;
+ } else
+ iq_on = on;
+}
+
+void display_iq_limit_scroll(int on)
+{
+ int w, h;
+
+ if (!iq_on)
+ return;
+
+ get_win_size(&w, &h);
+
+ printf("\0337");
+ printf("\033[%d;%dr", (on) ? SIZE + 1 : 1, h);
+ printf("\0338");
+}
+
+/*
+ * plot IQ data:
+ *
+ * theoretical example: SIZE = 3 allows 6 steps plotted as dots
+ *
+ * Line 0: :
+ * Line 1: :
+ * Line 2: :
+ *
+ * The level of -1.0 .. 1.0 is scaled to -3 and 3.
+ *
+ * The lowest of the upper 3 dots ranges from 0.0 .. <1.5.
+ * The upper most dot ranges from 2.5 .. <3.5.
+ * The highest of the lower 3 dots ranges from <0.0 .. >-1.5;
+ * The lower most dot ranges from -2.5 .. >-3.5.
+ *
+ * The center column ranges from -0.5 .. <0.5.
+ * The columns about the center from -1.5 .. <1.5.
+ */
+void display_iq(float *samples, int length)
+{
+ int pos, max;
+ float *buffer;
+ int i, j, k;
+ int color = 9; /* default color */
+ int x_center, y_center;
+ double I, Q, L, l, s;
+ int x, y;
+ int v, r;
+ int width, h;
+
+ if (!iq_on)
+ return;
+
+ get_win_size(&width, &h);
+
+ /* at what line we draw our zero-line and what character we use */
+ x_center = width >> 1;
+ y_center = (SIZE - 1) >> 1;
+
+ pos = disp.interval_pos;
+ max = disp.interval_max;
+ buffer = disp.buffer;
+
+ for (i = 0; i < length; i++) {
+ if (pos >= MAX_DISPLAY_IQ) {
+ if (++pos == max)
+ pos = 0;
+ continue;
+ }
+ buffer[pos * 2] = samples[i * 2];
+ buffer[pos * 2 + 1] = samples[i * 2 + 1];
+ pos++;
+ if (pos == MAX_DISPLAY_IQ) {
+ memset(&screen, ' ', sizeof(screen));
+ memset(&screen_color, 7, sizeof(screen_color));
+ /* render screen history to screen */
+ for (y = 0; y < SIZE * 2; y++) {
+ for (x = 0; x < width; x++) {
+ v = screen_history[y][x];
+ v -= 8;
+ if (v < 0)
+ v = 0;
+ screen_history[y][x] = v;
+ r = random() & 0x3f;
+ if (r >= v)
+ continue;
+ if (screen[y/2][x] == ':')
+ continue;
+ if (screen[y/2][x] == '.') {
+ if ((y & 1) == 0)
+ screen[y/2][x] = ':';
+ continue;
+ }
+ if (screen[y/2][x] == '\'') {
+ if ((y & 1))
+ screen[y/2][x] = ':';
+ continue;
+ }
+ if ((y & 1) == 0)
+ screen[y/2][x] = '\'';
+ else
+ screen[y/2][x] = '.';
+ screen_color[y/2][x] = 4;
+ }
+ }
+ /* plot current IQ date */
+ for (j = 0; j < MAX_DISPLAY_IQ; j++) {
+ I = buffer[j * 2];
+ Q = buffer[j * 2 + 1];
+ L = I*I + Q*Q;
+ if (iq_on > 1) {
+ /* logarithmic scale */
+ l = sqrt(L);
+ s = log10(l) * 20 + db;
+ if (s < 0)
+ s = 0;
+ I = (I / l) * (s / db);
+ Q = (Q / l) * (s / db);
+ }
+ x = x_center + (int)(I * (double)SIZE + (double)width + 0.5) - width;
+ if (x < 0)
+ continue;
+ if (x > width - 1)
+ continue;
+ if (Q >= 0)
+ y = SIZE - 1 - (int)(Q * (double)SIZE - 0.5);
+ else
+ y = SIZE - (int)(Q * (double)SIZE + 0.5);
+ if (y < 0)
+ continue;
+ if (y > SIZE * 2 - 1)
+ continue;
+ if (screen[y/2][x] == ':' && screen_color[y/2][x] >= 10)
+ goto cont;
+ if (screen[y/2][x] == '.' && screen_color[y/2][x] >= 10) {
+ if ((y & 1) == 0)
+ screen[y/2][x] = ':';
+ goto cont;
+ }
+ if (screen[y/2][x] == '\'' && screen_color[y/2][x] >= 10) {
+ if ((y & 1))
+ screen[y/2][x] = ':';
+ goto cont;
+ }
+ if ((y & 1) == 0)
+ screen[y/2][x] = '\'';
+ else
+ screen[y/2][x] = '.';
+cont:
+ screen_history[y][x] = 255;
+ /* overdrive:
+ * red = close to -1..1 or above
+ * yellow = close to -0.5..0.5 or above
+ * Note: L is square of vector length,
+ * so we compare with square values.
+ */
+ if (L > 0.9 * 0.9)
+ screen_color[y/2][x] = 11;
+ else if (L > 0.45 * 0.45 && screen_color[y/2][x] != 11)
+ screen_color[y/2][x] = 13;
+ else if (screen_color[y/2][x] < 10)
+ screen_color[y/2][x] = 12;
+ }
+ if (iq_on == 1)
+ sprintf(screen[0], "(IQ linear");
+ else
+ sprintf(screen[0], "(IQ log %.0f dB", db);
+ *strchr(screen[0], '\0') = ')';
+ printf("\0337\033[H");
+ for (j = 0; j < SIZE; j++) {
+ for (k = 0; k < width; k++) {
+ if ((j == y_center || k == x_center) && screen[j][k] == ' ') {
+ /* cross */
+ if (color != 4) {
+ color = 4;
+ printf("\033[0;34m");
+ }
+ if (j == y_center) {
+ if (k == x_center)
+ putchar('o');
+ else if (k == x_center - SIZE)
+ putchar('+');
+ else if (k == x_center + SIZE)
+ putchar('+');
+ else
+ putchar('-');
+ } else {
+ if (j == 0 || j == SIZE - 1)
+ putchar('+');
+ else
+ putchar('|');
+ }
+ } else {
+ if (screen_color[j][k] != color) {
+ color = screen_color[j][k];
+ printf("\033[%d;3%dm", color / 10, color % 10);
+ }
+ putchar(screen[j][k]);
+ }
+ }
+ printf("\n");
+ }
+ /* reset color and position */
+ printf("\033[0;39m\0338"); fflush(stdout);
+ }
+ }
+
+ disp.interval_pos = pos;
+}
+
+
diff --git a/src/libsdr/display_spectrum.c b/src/libsdr/display_spectrum.c
new file mode 100644
index 0000000..6c60237
--- /dev/null
+++ b/src/libsdr/display_spectrum.c
@@ -0,0 +1,292 @@
+/* display spectrum of IQ data
+ *
+ * (C) 2016 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 <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include "../common/sample.h"
+#include "../common/sender.h"
+#include "../libfft/fft.h"
+
+#define HEIGHT 20
+
+static double buffer_max[MAX_DISPLAY_SPECTRUM];
+static char screen[HEIGHT][MAX_DISPLAY_WIDTH];
+static uint8_t screen_color[HEIGHT][MAX_DISPLAY_WIDTH];
+static int spectrum_on = 0;
+static double db = 120;
+static double center_frequency, frequency_range;
+
+static dispspectrum_t disp;
+
+void display_spectrum_init(int samplerate, double _center_frequency)
+{
+ memset(&disp, 0, sizeof(disp));
+ disp.interval_max = (double)samplerate * DISPLAY_INTERVAL + 0.5;
+ /* should not happen due to low interval */
+ if (disp.interval_max < MAX_DISPLAY_SPECTRUM - 1)
+ disp.interval_max = MAX_DISPLAY_SPECTRUM - 1;
+ memset(buffer_max, 0, sizeof(buffer_max));
+
+ center_frequency = _center_frequency;
+ frequency_range = (double)samplerate;
+}
+
+void display_spectrum_on(int on)
+{
+ int j;
+ int w, h;
+
+ get_win_size(&w, &h);
+
+ if (spectrum_on) {
+ memset(&screen, ' ', sizeof(screen));
+ printf("\0337\033[H");
+ for (j = 0; j < HEIGHT; j++) {
+ screen[j][w] = '\0';
+ puts(screen[j]);
+ }
+ printf("\0338"); fflush(stdout);
+ }
+
+ if (on < 0) {
+ if (++spectrum_on == 2)
+ spectrum_on = 0;
+ } else
+ spectrum_on = on;
+}
+
+void display_spectrum_limit_scroll(int on)
+{
+ int w, h;
+
+ if (!spectrum_on)
+ return;
+
+ get_win_size(&w, &h);
+
+ printf("\0337");
+ printf("\033[%d;%dr", (on) ? HEIGHT + 1 : 1, h);
+ printf("\0338");
+}
+
+/*
+ * plot spectrum data:
+ *
+ */
+void display_spectrum(float *samples, int length)
+{
+ sender_t *sender;
+ char print_channel[32], print_frequency[32];
+ int width, h;
+ int pos, max;
+ double *buffer_I, *buffer_Q;
+ int color = 9; /* default color */
+ int i, j, k, o;
+ double I, Q, v;
+ int s, e, l, n;
+
+ if (!spectrum_on)
+ return;
+
+ get_win_size(&width, &h);
+ if (width > MAX_DISPLAY_WIDTH)
+ width = MAX_DISPLAY_WIDTH;
+
+ /* calculate size of FFT */
+ int m, fft_size = 0, fft_taps = 0;
+ for (m = 0; m < 16; m++) {
+ if ((1 << m) > MAX_DISPLAY_SPECTRUM)
+ break;
+ if ((1 << m) <= width) {
+ fft_taps = m;
+ fft_size = 1 << m;
+ }
+ }
+ if (m == 16) {
+ fprintf(stderr, "Size of spectrum is not a power of 2, please fix!\n");
+ abort();
+ }
+
+ int heigh[fft_size], low[fft_size];
+
+ pos = disp.interval_pos;
+ max = disp.interval_max;
+ buffer_I = disp.buffer_I;
+ buffer_Q = disp.buffer_Q;
+
+ for (i = 0; i < length; i++) {
+ if (pos >= fft_size) {
+ if (++pos == max)
+ pos = 0;
+ continue;
+ }
+ buffer_I[pos] = samples[i * 2];
+ buffer_Q[pos] = samples[i * 2 + 1];
+ pos++;
+ if (pos == fft_size) {
+ fft_process(1, fft_taps, buffer_I, buffer_Q);
+ k = 0;
+ for (j = 0; j < fft_size; j++) {
+ /* scale result vertically */
+ I = buffer_I[(j + fft_size / 2) % fft_size];
+ Q = buffer_Q[(j + fft_size / 2) % fft_size];
+ v = sqrt(I*I + Q*Q);
+ v = log10(v) * 20 + db;
+ if (v < 0)
+ v = 0;
+ v /= db;
+ buffer_max[j] -= DISPLAY_INTERVAL / 10.0;
+ if (v > buffer_max[j])
+ buffer_max[j] = v;
+
+ /* heigh is the maximum value */
+ heigh[j] = (double)(HEIGHT * 2 - 1) * (1.0 - buffer_max[j]);
+ if (heigh[j] < 0)
+ heigh[j] = 0;
+ if (heigh[j] >= (HEIGHT * 2))
+ heigh[j] = (HEIGHT * 2) - 1;
+ /* low is the current value */
+ low[j] = (double)(HEIGHT * 2 - 1) * (1.0 - v);
+ if (low[j] < 0)
+ low[j] = 0;
+ if (low[j] >= (HEIGHT * 2))
+ low[j] = (HEIGHT * 2) - 1;
+ }
+ /* plot scaled buffer */
+ memset(&screen, ' ', sizeof(screen));
+ memset(&screen_color, 7, sizeof(screen_color)); /* all white */
+ sprintf(screen[0], "(spectrum log %.0f dB", db);
+ *strchr(screen[0], '\0') = ')';
+ o = (width - fft_size) / 2; /* offset from left border */
+ for (j = 0; j < fft_size; j++) {
+ s = l = n = low[j];
+ /* get last and next value */
+ if (j > 0)
+ l = (low[j - 1] + s) / 2;
+ if (j < fft_size - 1)
+ n = (low[j + 1] + s) / 2;
+ if (s > l && s > n) {
+ /* current value is a minimum */
+ e = s;
+ s = (l < n) ? (l + 1) : (n + 1);
+ } else if (s < l && s < n) {
+ /* current value is a maximum */
+ e = (l > n) ? l : n;
+ } else if (l < n) {
+ /* last value is higher, next value is lower */
+ s = l + 1;
+ e = n;
+ } else if (l > n) {
+ /* last value is lower, next value is higher */
+ s = n + 1;
+ e = l;
+ } else {
+ /* current, last and next values are equal */
+ e = s;
+ }
+ if (s == e) {
+ if ((s & 1) == 0)
+ screen[s >> 1][j + o] = '\'';
+ else
+ screen[s >> 1][j + o] = '.';
+ screen_color[s >> 1][j + o] = 13;
+ } else {
+ if ((s & 1) == 0)
+ screen[s >> 1][j + o] = '|';
+ else
+ screen[s >> 1][j + o] = '.';
+ screen_color[s >> 1][j + o] = 13;
+ if ((e & 1) == 0)
+ screen[e >> 1][j + o] = '\'';
+ else
+ screen[e >> 1][j + o] = '|';
+ screen_color[e >> 1][j + o] = 13;
+ for (k = (s >> 1) + 1; k < (e >> 1); k++) {
+ screen[k][j + o] = '|';
+ screen_color[k][j + o] = 13;
+ }
+ }
+ e = s;
+ s = heigh[j];
+ if ((s >> 1) < (e >> 1)) {
+ if ((s & 1) == 0)
+ screen[s >> 1][j + o] = '|';
+ else
+ screen[s >> 1][j + o] = '.';
+ screen_color[s >> 1][j + o] = 4;
+ for (k = (s >> 1) + 1; k < (e >> 1); k++) {
+ screen[k][j + o] = '|';
+ screen_color[k][j + o] = 4;
+ }
+ }
+ }
+ for (sender = sender_head; sender; sender = sender->next) {
+ j = (int)((sender->empfangsfrequenz - center_frequency) / frequency_range * (double) fft_size + width / 2 + 0.5);
+ if (j < 0 || j >= width) /* check out-of-range, should not happen */
+ continue;
+ for (k = 0; k < HEIGHT; k++) {
+ /* skip yellow graph */
+ if (screen_color[k][j] == 13)
+ continue;
+ screen[k][j] = ':';
+ screen_color[k][j] = 12;
+ }
+ sprintf(print_channel, "Ch%d", sender->kanal);
+ for (o = 0; o < (int)strlen(print_channel); o++) {
+ s = j - strlen(print_channel) + o;
+ if (s >= 0 && s < width) {
+ screen[HEIGHT - 1][s] = print_channel[o];
+ screen_color[HEIGHT - 1][s] = 7;
+ }
+ }
+ if (fmod(sender->empfangsfrequenz, 1000.0))
+ sprintf(print_frequency, "%.4f", sender->empfangsfrequenz / 1e6);
+ else
+ sprintf(print_frequency, "%.3f", sender->empfangsfrequenz / 1e6);
+ for (o = 0; o < (int)strlen(print_frequency); o++) {
+ s = j + o + 1;
+ if (s >= 0 && s < width) {
+ screen[HEIGHT - 1][s] = print_frequency[o];
+ screen_color[HEIGHT - 1][s] = 7;
+ }
+ }
+ }
+ printf("\0337\033[H");
+ for (j = 0; j < HEIGHT; j++) {
+ for (k = 0; k < width; k++) {
+ if (screen_color[j][k] != color) {
+ color = screen_color[j][k];
+ printf("\033[%d;3%dm", color / 10, color % 10);
+ }
+ putchar(screen[j][k]);
+ }
+ printf("\n");
+ }
+ /* reset color and position */
+ printf("\033[0;39m\0338"); fflush(stdout);
+ }
+ }
+
+ disp.interval_pos = pos;
+}
+
+
diff --git a/src/libsdr/sdr.c b/src/libsdr/sdr.c
new file mode 100644
index 0000000..69e07c1
--- /dev/null
+++ b/src/libsdr/sdr.c
@@ -0,0 +1,865 @@
+/* SDR processing
+ *
+ * (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/>.
+ */
+
+enum paging_signal;
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+#include <math.h>
+#include <getopt.h>
+#define __USE_GNU
+#include <pthread.h>
+#include <unistd.h>
+#include "../common/sample.h"
+#include "../libfm/fm.h"
+#include "../libtimer/timer.h"
+#include "../common/sender.h"
+#include "sdr_config.h"
+#include "sdr.h"
+#ifdef HAVE_UHD
+#include "uhd.h"
+#endif
+#ifdef HAVE_SOAPY
+#include "soapy.h"
+#endif
+#include "../common/debug.h"
+
+/* enable to debug buffer handling */
+//#define DEBUG_BUFFER
+
+/* enable to test without oversampling filter */
+//#define DISABLE_FILTER
+
+/* usable bandwidth of IQ rate, because no filter is perfect */
+#define USABLE_BANDWIDTH 0.75
+
+int sdr_rx_overflow = 0;
+
+typedef struct sdr_thread {
+ int use;
+ volatile int running, exit; /* flags to control exit of threads */
+ int buffer_size;
+ volatile float *buffer;
+ float *buffer2;
+ volatile int in, out; /* in and out pointers (atomic, so no locking required) */
+ int max_fill; /* measure maximum buffer fill */
+ double max_fill_timer; /* timer to display/reset maximum fill */
+ iir_filter_t lp[2]; /* filter for upsample/downsample IQ data */
+} sdr_thread_t;
+
+typedef struct sdr_chan {
+ double tx_frequency; /* frequency used */
+ double rx_frequency; /* frequency used */
+ fm_mod_t mod; /* modulator instance */
+ fm_demod_t demod; /* demodulator instance */
+ dispmeasparam_t *dmp_rf_level;
+ dispmeasparam_t *dmp_freq_offset;
+ dispmeasparam_t *dmp_deviation;
+} sdr_chan_t;
+
+typedef struct sdr {
+ int threads; /* use threads */
+ int oversample; /* oversample IQ rate */
+ sdr_thread_t thread_read,
+ thread_write;
+ sdr_chan_t *chan; /* settings for all channels */
+ int paging_channel; /* if set, points to paging channel */
+ sdr_chan_t paging_chan; /* settings for extra paging channel */
+ int channels; /* number of frequencies */
+ double amplitude; /* amplitude of each carrier */
+ int samplerate; /* sample rate of audio data */
+ int latspl; /* latency in audio samples */
+ wave_rec_t wave_rx_rec;
+ wave_rec_t wave_tx_rec;
+ wave_play_t wave_rx_play;
+ wave_play_t wave_tx_play;
+ float *modbuff; /* buffer for FM transmodulation */
+ sample_t *modbuff_I;
+ sample_t *modbuff_Q;
+ sample_t *wavespl0; /* sample buffer for wave generation */
+ sample_t *wavespl1;
+} sdr_t;
+
+void *sdr_open(const char __attribute__((__unused__)) *audiodev, double *tx_frequency, double *rx_frequency, int channels, double paging_frequency, int samplerate, int latspl, double max_deviation, double max_modulation)
+{
+ sdr_t *sdr;
+ int threads = 1, oversample = 1; /* always use threads */
+ double bandwidth;
+ double tx_center_frequency = 0.0, rx_center_frequency = 0.0;
+ int rc;
+ int c;
+
+ PDEBUG(DSDR, DEBUG_DEBUG, "Open SDR device\n");
+
+ if (sdr_config->samplerate != samplerate) {
+ if (samplerate > sdr_config->samplerate) {
+ PDEBUG(DSDR, DEBUG_ERROR, "SDR sample rate must be greater than audio sample rate!\n");
+ PDEBUG(DSDR, DEBUG_ERROR, "You selected an SDR rate of %d and an audio rate of %d.\n", sdr_config->samplerate, samplerate);
+ return NULL;
+ }
+ if ((sdr_config->samplerate % samplerate)) {
+ PDEBUG(DSDR, DEBUG_ERROR, "SDR sample rate must be a multiple of audio sample rate!\n");
+ PDEBUG(DSDR, DEBUG_ERROR, "You selected an SDR rate of %d and an audio rate of %d.\n", sdr_config->samplerate, samplerate);
+ return NULL;
+ }
+ oversample = sdr_config->samplerate / samplerate;
+ threads = 1;
+ }
+
+ bandwidth = 2.0 * (max_deviation + max_modulation);
+ PDEBUG(DSDR, DEBUG_INFO, "Require bandwidth of each channel is 2 * (%.1f deviation + %.1f modulation) = %.1f KHz\n", max_deviation / 1e3, max_modulation / 1e3, bandwidth / 1e3);
+
+ if (channels < 1) {
+ PDEBUG(DSDR, DEBUG_ERROR, "No channel given, please fix!\n");
+ abort();
+ }
+
+ sdr = calloc(sizeof(*sdr), 1);
+ if (!sdr) {
+ PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
+ goto error;
+ }
+ sdr->channels = channels;
+ sdr->amplitude = 1.0 / (double)channels;
+ sdr->samplerate = samplerate;
+ sdr->latspl = latspl;
+ sdr->threads = threads; /* always requried, because write may block */
+ sdr->oversample = oversample;
+
+ if (threads) {
+ memset(&sdr->thread_read, 0, sizeof(sdr->thread_read));
+ sdr->thread_read.buffer_size = sdr->latspl * 2 * sdr->oversample + 2;
+ sdr->thread_read.buffer = calloc(sdr->thread_read.buffer_size, sizeof(*sdr->thread_read.buffer));
+ if (!sdr->thread_read.buffer) {
+ PDEBUG(DSDR, DEBUG_ERROR, "No mem!\n");
+ goto error;
+ }
+ sdr->thread_read.buffer2 = calloc(sdr->thread_read.buffer_size, sizeof(*sdr->thread_read.buffer2));
+ if (!sdr->thread_read.buffer2) {
+ PDEBUG(DSDR, DEBUG_ERROR, "No mem!\n");
+ goto error;
+ }
+ sdr->thread_read.in = sdr->thread_read.out = 0;
+ if (oversample > 1) {
+ iir_lowpass_init(&sdr->thread_read.lp[0], samplerate / 2.0, sdr_config->samplerate, 2);
+ iir_lowpass_init(&sdr->thread_read.lp[1], samplerate / 2.0, sdr_config->samplerate, 2);
+ }
+ memset(&sdr->thread_write, 0, sizeof(sdr->thread_write));
+ sdr->thread_write.buffer_size = sdr->latspl * 2 + 2;
+ sdr->thread_write.buffer = calloc(sdr->thread_write.buffer_size, sizeof(*sdr->thread_write.buffer));
+ if (!sdr->thread_write.buffer) {
+ PDEBUG(DSDR, DEBUG_ERROR, "No mem!\n");
+ goto error;
+ }
+ sdr->thread_write.buffer2 = calloc(sdr->thread_write.buffer_size * sdr->oversample, sizeof(*sdr->thread_write.buffer2));
+ if (!sdr->thread_write.buffer2) {
+ PDEBUG(DSDR, DEBUG_ERROR, "No mem!\n");
+ goto error;
+ }
+ sdr->thread_write.in = sdr->thread_write.out = 0;
+ if (oversample > 1) {
+ iir_lowpass_init(&sdr->thread_write.lp[0], samplerate / 2.0, sdr_config->samplerate, 2);
+ iir_lowpass_init(&sdr->thread_write.lp[1], samplerate / 2.0, sdr_config->samplerate, 2);
+ }
+ }
+
+ /* alloc fm modulation buffers */
+ sdr->modbuff = calloc(sdr->latspl * 2, sizeof(*sdr->modbuff));
+ if (!sdr->modbuff) {
+ PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
+ goto error;
+ }
+ sdr->modbuff_I = calloc(sdr->latspl, sizeof(*sdr->modbuff_I));
+ if (!sdr->modbuff_I) {
+ PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
+ goto error;
+ }
+ sdr->modbuff_Q = calloc(sdr->latspl, sizeof(*sdr->modbuff_Q));
+ if (!sdr->modbuff_Q) {
+ PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
+ goto error;
+ }
+ sdr->wavespl0 = calloc(sdr->latspl, sizeof(*sdr->wavespl0));
+ if (!sdr->wavespl0) {
+ PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
+ goto error;
+ }
+ sdr->wavespl1 = calloc(sdr->latspl, sizeof(*sdr->wavespl1));
+ if (!sdr->wavespl1) {
+ PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
+ goto error;
+ }
+
+ /* special case where we use a paging frequency */
+ if (paging_frequency) {
+ /* add extra paging channel */
+ sdr->paging_channel = channels;
+ }
+
+ /* create list of channel states */
+ sdr->chan = calloc(sizeof(*sdr->chan), channels + (sdr->paging_channel != 0));
+ if (!sdr->chan) {
+ PDEBUG(DSDR, DEBUG_ERROR, "NO MEM!\n");
+ goto error;
+ }
+
+ if (tx_frequency) {
+ /* calculate required bandwidth (IQ rate) */
+ for (c = 0; c < channels; c++) {
+ PDEBUG(DSDR, DEBUG_INFO, "Frequency #%d: TX = %.6f MHz\n", c, tx_frequency[c] / 1e6);
+ sdr->chan[c].tx_frequency = tx_frequency[c];
+ }
+ if (sdr->paging_channel) {
+ PDEBUG(DSDR, DEBUG_INFO, "Paging Frequency: TX = %.6f MHz\n", paging_frequency / 1e6);
+ sdr->chan[sdr->paging_channel].tx_frequency = paging_frequency;
+ }
+
+ double tx_low_frequency = sdr->chan[0].tx_frequency, tx_high_frequency = sdr->chan[0].tx_frequency;
+ for (c = 1; c < channels; c++) {
+ if (sdr->chan[c].tx_frequency < tx_low_frequency)
+ tx_low_frequency = sdr->chan[c].tx_frequency;
+ if (sdr->chan[c].tx_frequency > tx_high_frequency)
+ tx_high_frequency = sdr->chan[c].tx_frequency;
+ }
+ if (sdr->paging_channel) {
+ if (sdr->chan[sdr->paging_channel].tx_frequency < tx_low_frequency)
+ tx_low_frequency = sdr->chan[sdr->paging_channel].tx_frequency;
+ if (sdr->chan[sdr->paging_channel].tx_frequency > tx_high_frequency)
+ tx_high_frequency = sdr->chan[sdr->paging_channel].tx_frequency;
+ }
+ /* range of TX */
+ double range = tx_high_frequency - tx_low_frequency + bandwidth;
+ PDEBUG(DSDR, DEBUG_INFO, "Total bandwidth for all TX Frequencies: %.0f Hz\n", range);
+ if (range > samplerate * USABLE_BANDWIDTH) {
+ PDEBUG(DSDR, DEBUG_NOTICE, "*******************************************************************************\n");
+ PDEBUG(DSDR, DEBUG_NOTICE, "The required bandwidth of %.0f Hz exceeds %.0f%% of the sample rate.\n", range, USABLE_BANDWIDTH * 100.0);
+ PDEBUG(DSDR, DEBUG_NOTICE, "Please increase samplerate!\n");
+ PDEBUG(DSDR, DEBUG_NOTICE, "*******************************************************************************\n");
+ goto error;
+ }
+ tx_center_frequency = (tx_high_frequency + tx_low_frequency) / 2.0;
+ PDEBUG(DSDR, DEBUG_INFO, "Using center frequency: TX %.6f MHz\n", tx_center_frequency / 1e6);
+ /* set offsets to center frequency */
+ for (c = 0; c < channels; c++) {
+ double tx_offset;
+ tx_offset = sdr->chan[c].tx_frequency - tx_center_frequency;
+ PDEBUG(DSDR, DEBUG_DEBUG, "Frequency #%d: TX offset: %.6f MHz\n", c, tx_offset / 1e6);
+ rc = fm_mod_init(&sdr->chan[c].mod, samplerate, tx_offset, sdr->amplitude);
+ if (rc < 0)
+ goto error;
+ }
+ if (sdr->paging_channel) {
+ double tx_offset;
+ tx_offset = sdr->chan[sdr->paging_channel].tx_frequency - tx_center_frequency;
+ PDEBUG(DSDR, DEBUG_DEBUG, "Paging Frequency: TX offset: %.6f MHz\n", tx_offset / 1e6);
+ rc = fm_mod_init(&sdr->chan[sdr->paging_channel].mod, samplerate, tx_offset, sdr->amplitude);
+ if (rc < 0)
+ goto error;
+ }
+ /* show gain */
+ PDEBUG(DSDR, DEBUG_INFO, "Using gain: TX %.1f dB\n", sdr_config->tx_gain);
+ /* open wave */
+ if (sdr_config->write_iq_tx_wave) {
+ rc = wave_create_record(&sdr->wave_tx_rec, sdr_config->write_iq_tx_wave, samplerate, 2, 1.0);
+ if (rc < 0) {
+ PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE recoding instance!\n");
+ goto error;
+ }
+ }
+ if (sdr_config->read_iq_tx_wave) {
+ rc = wave_create_playback(&sdr->wave_tx_play, sdr_config->read_iq_tx_wave, samplerate, 2, 1.0);
+ if (rc < 0) {
+ PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE playback instance!\n");
+ goto error;
+ }
+ }
+ }
+
+ if (rx_frequency) {
+ for (c = 0; c < channels; c++) {
+ PDEBUG(DSDR, DEBUG_INFO, "Frequency #%d: RX = %.6f MHz\n", c, rx_frequency[c] / 1e6);
+ sdr->chan[c].rx_frequency = rx_frequency[c];
+ }
+
+ /* calculate required bandwidth (IQ rate) */
+ double rx_low_frequency = sdr->chan[0].rx_frequency, rx_high_frequency = sdr->chan[0].rx_frequency;
+ for (c = 1; c < channels; c++) {
+ if (sdr->chan[c].rx_frequency < rx_low_frequency)
+ rx_low_frequency = sdr->chan[c].rx_frequency;
+ if (sdr->chan[c].rx_frequency > rx_high_frequency)
+ rx_high_frequency = sdr->chan[c].rx_frequency;
+ }
+ /* range of RX */
+ double range = rx_high_frequency - rx_low_frequency + bandwidth;
+ PDEBUG(DSDR, DEBUG_INFO, "Total bandwidth for all RX Frequencies: %.0f Hz\n", range);
+ if (range > samplerate * USABLE_BANDWIDTH) {
+ PDEBUG(DSDR, DEBUG_NOTICE, "*******************************************************************************\n");
+ PDEBUG(DSDR, DEBUG_NOTICE, "The required bandwidth of %.0f Hz exceeds %.0f%% of the sample rate.\n", range, USABLE_BANDWIDTH * 100.0);
+ PDEBUG(DSDR, DEBUG_NOTICE, "Please increase samplerate!\n");
+ PDEBUG(DSDR, DEBUG_NOTICE, "*******************************************************************************\n");
+ goto error;
+ }
+ rx_center_frequency = (rx_high_frequency + rx_low_frequency) / 2.0;
+ PDEBUG(DSDR, DEBUG_INFO, "Using center frequency: RX %.6f MHz\n", rx_center_frequency / 1e6);
+ /* set offsets to center frequency */
+ for (c = 0; c < channels; c++) {
+ double rx_offset;
+ rx_offset = sdr->chan[c].rx_frequency - rx_center_frequency;
+ PDEBUG(DSDR, DEBUG_DEBUG, "Frequency #%d: RX offset: %.6f MHz\n", c, rx_offset / 1e6);
+ rc = fm_demod_init(&sdr->chan[c].demod, samplerate, rx_offset, bandwidth);
+ if (rc < 0)
+ goto error;
+ }
+ /* show gain */
+ PDEBUG(DSDR, DEBUG_INFO, "Using gain: RX %.1f dB\n", sdr_config->rx_gain);
+ /* open wave */
+ if (sdr_config->write_iq_rx_wave) {
+ rc = wave_create_record(&sdr->wave_rx_rec, sdr_config->write_iq_rx_wave, samplerate, 2, 1.0);
+ if (rc < 0) {
+ PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE recoding instance!\n");
+ goto error;
+ }
+ }
+ if (sdr_config->read_iq_rx_wave) {
+ rc = wave_create_playback(&sdr->wave_rx_play, sdr_config->read_iq_rx_wave, samplerate, 2, 1.0);
+ if (rc < 0) {
+ PDEBUG(DSDR, DEBUG_ERROR, "Failed to create WAVE playback instance!\n");
+ goto error;
+ }
+ }
+ /* init measurements display */
+ for (c = 0; c < channels; c++) {
+ sender_t *sender = get_sender_by_empfangsfrequenz(sdr->chan[c].rx_frequency);
+ if (!sender)
+ continue;
+ sdr->chan[c].dmp_rf_level = display_measurements_add(sender, "RF Level", "%.1f dB", DISPLAY_MEAS_AVG, DISPLAY_MEAS_LEFT, -96.0, 0.0, -INFINITY);
+ sdr->chan[c].dmp_freq_offset = display_measurements_add(sender, "Freq. Offset", "%+.2f KHz", DISPLAY_MEAS_AVG, DISPLAY_MEAS_CENTER, -max_deviation / 1000.0 * 2.0, max_deviation / 1000.0 * 2.0, 0.0);
+ sdr->chan[c].dmp_deviation = display_measurements_add(sender, "Deviation", "%.2f KHz", DISPLAY_MEAS_PEAK2PEAK, DISPLAY_MEAS_LEFT, 0.0, max_deviation / 1000.0 * 1.5, max_deviation / 1000.0);
+ }
+ }
+
+ if (sdr_config->swap_links) {
+ double temp;
+ PDEBUG(DSDR, DEBUG_NOTICE, "Sapping RX and TX frequencies!\n");
+ temp = rx_center_frequency;
+ rx_center_frequency = tx_center_frequency;
+ tx_center_frequency = temp;
+ }
+
+ display_iq_init(samplerate);
+ display_spectrum_init(samplerate, rx_center_frequency);
+
+#ifdef HAVE_UHD
+ if (sdr_config->uhd) {
+ rc = uhd_open(sdr_config->channel, sdr_config->device_args, sdr_config->stream_args, sdr_config->tune_args, sdr_config->tx_antenna, sdr_config->rx_antenna, tx_center_frequency, rx_center_frequency, sdr_config->samplerate, sdr_config->tx_gain, sdr_config->rx_gain, sdr_config->bandwidth, sdr_config->uhd_tx_timestamps);
+ if (rc)
+ goto error;
+ }
+#endif
+
+#ifdef HAVE_SOAPY
+ if (sdr_config->soapy) {
+ rc = soapy_open(sdr_config->channel, sdr_config->device_args, sdr_config->stream_args, sdr_config->tune_args, sdr_config->tx_antenna, sdr_config->rx_antenna, tx_center_frequency, rx_center_frequency, sdr_config->samplerate, sdr_config->tx_gain, sdr_config->rx_gain, sdr_config->bandwidth);
+ if (rc)
+ goto error;
+ }
+#endif
+
+ return sdr;
+
+error:
+ sdr_close(sdr);
+ return NULL;
+}
+
+static void *sdr_write_child(void *arg)
+{
+ sdr_t *sdr = (sdr_t *)arg;
+ int num;
+ int fill, out;
+ int s, ss, o;
+
+ while (sdr->thread_write.running) {
+ /* write to SDR */
+ fill = (sdr->thread_write.in - sdr->thread_write.out + sdr->thread_write.buffer_size) % sdr->thread_write.buffer_size;
+ num = fill / 2;
+ if (num) {
+#ifdef DEBUG_BUFFER
+ printf("Thread found %d samples in write buffer and forwards them to SDR.\n", num);
+#endif
+ out = sdr->thread_write.out;
+ for (s = 0, ss = 0; s < num; s++) {
+ for (o = 0; o < sdr->oversample; o++) {
+ sdr->thread_write.buffer2[ss++] = sdr->thread_write.buffer[out];
+ sdr->thread_write.buffer2[ss++] = sdr->thread_write.buffer[out + 1];
+ }
+ out = (out + 2) % sdr->thread_write.buffer_size;
+ }
+ sdr->thread_write.out = out;
+#ifndef DISABLE_FILTER
+ /* filter spectrum */
+ if (sdr->oversample > 1) {
+ iir_process_baseband(&sdr->thread_write.lp[0], sdr->thread_write.buffer2, num * sdr->oversample);
+ iir_process_baseband(&sdr->thread_write.lp[1], sdr->thread_write.buffer2 + 1, num * sdr->oversample);
+ }
+#endif
+#ifdef HAVE_UHD
+ if (sdr_config->uhd)
+ uhd_send(sdr->thread_write.buffer2, num * sdr->oversample);
+#endif
+#ifdef HAVE_SOAPY
+ if (sdr_config->soapy)
+ soapy_send(sdr->thread_write.buffer2, num * sdr->oversample);
+#endif
+ }
+
+ /* delay some time */
+ usleep(1000);
+ }
+
+ PDEBUG(DSDR, DEBUG_DEBUG, "Thread received exit!\n");
+ sdr->thread_write.exit = 1;
+ return NULL;
+}
+
+static void *sdr_read_child(void *arg)
+{
+ sdr_t *sdr = (sdr_t *)arg;
+ int num, count = 0;
+ int space, in;
+ int s, ss;
+
+ while (sdr->thread_read.running) {
+ /* read from SDR */
+ space = (sdr->thread_read.out - sdr->thread_read.in - 2 + sdr->thread_read.buffer_size) % sdr->thread_read.buffer_size;
+ num = space / 2;
+ if (num) {
+#ifdef HAVE_UHD
+ if (sdr_config->uhd)
+ count = uhd_receive(sdr->thread_read.buffer2, num);
+#endif
+#ifdef HAVE_SOAPY
+ if (sdr_config->soapy)
+ count = soapy_receive(sdr->thread_read.buffer2, num);
+#endif
+ if (count > 0) {
+#ifdef DEBUG_BUFFER
+ printf("Thread read %d samples from SDR and writes them to read buffer.\n", count);
+#endif
+#ifndef DISABLE_FILTER
+ /* filter spectrum */
+ if (sdr->oversample > 1) {
+ iir_process_baseband(&sdr->thread_read.lp[0], sdr->thread_read.buffer2, count);
+ iir_process_baseband(&sdr->thread_read.lp[1], sdr->thread_read.buffer2 + 1, count);
+ }
+#endif
+ in = sdr->thread_read.in;
+ for (s = 0, ss = 0; s < count; s++) {
+ sdr->thread_read.buffer[in++] = sdr->thread_read.buffer2[ss++];
+ sdr->thread_read.buffer[in++] = sdr->thread_read.buffer2[ss++];
+ in %= sdr->thread_read.buffer_size;
+ }
+ sdr->thread_read.in = in;
+ }
+ }
+
+ /* delay some time */
+ usleep(1000);
+ }
+
+ PDEBUG(DSDR, DEBUG_DEBUG, "Thread received exit!\n");
+ sdr->thread_read.exit = 1;
+ return NULL;
+}
+
+/* start streaming */
+int sdr_start(void *inst)
+{
+ sdr_t *sdr = (sdr_t *)inst;
+ int rc = -EINVAL;
+
+#ifdef HAVE_UHD
+ if (sdr_config->uhd)
+ rc = uhd_start();
+#endif
+#ifdef HAVE_SOAPY
+ if (sdr_config->soapy)
+ rc = soapy_start();
+#endif
+ if (rc < 0)
+ return rc;
+
+ if (sdr->threads) {
+ int rc;
+ pthread_t tid;
+ char tname[64];
+
+ PDEBUG(DSDR, DEBUG_DEBUG, "Create threads!\n");
+ sdr->thread_write.running = 1;
+ sdr->thread_write.exit = 0;
+ rc = pthread_create(&tid, NULL, sdr_write_child, inst);
+ if (rc < 0) {
+ sdr->thread_write.running = 0;
+ PDEBUG(DSDR, DEBUG_ERROR, "Failed to create thread!\n");
+ return rc;
+ }
+ pthread_getname_np(tid, tname, sizeof(tname));
+ strncat(tname, "-sdr_tx", sizeof(tname));
+ tname[sizeof(tname) - 1] = '\0';
+ pthread_setname_np(tid, tname);
+ sdr->thread_read.running = 1;
+ sdr->thread_read.exit = 0;
+ rc = pthread_create(&tid, NULL, sdr_read_child, inst);
+ if (rc < 0) {
+ sdr->thread_read.running = 0;
+ PDEBUG(DSDR, DEBUG_ERROR, "Failed to create thread!\n");
+ return rc;
+ }
+ pthread_getname_np(tid, tname, sizeof(tname));
+ strncat(tname, "-sdr_rx", sizeof(tname));
+ tname[sizeof(tname) - 1] = '\0';
+ pthread_setname_np(tid, tname);
+ }
+
+ return 0;
+}
+
+void sdr_close(void *inst)
+{
+ sdr_t *sdr = (sdr_t *)inst;
+
+ PDEBUG(DSDR, DEBUG_DEBUG, "Close SDR device\n");
+
+ if (sdr->threads) {
+ if (sdr->thread_write.running) {
+ PDEBUG(DSDR, DEBUG_DEBUG, "Thread sending exit!\n");
+ sdr->thread_write.running = 0;
+ while (sdr->thread_write.exit == 0)
+ usleep(1000);
+ }
+ if (sdr->thread_read.running) {
+ PDEBUG(DSDR, DEBUG_DEBUG, "Thread sending exit!\n");
+ sdr->thread_read.running = 0;
+ while (sdr->thread_read.exit == 0)
+ usleep(1000);
+ }
+ }
+
+ if (sdr->thread_read.buffer)
+ free((void *)sdr->thread_read.buffer);
+ if (sdr->thread_read.buffer2)
+ free((void *)sdr->thread_read.buffer2);
+ if (sdr->thread_write.buffer)
+ free((void *)sdr->thread_write.buffer);
+ if (sdr->thread_write.buffer2)
+ free((void *)sdr->thread_write.buffer2);
+
+#ifdef HAVE_UHD
+ if (sdr_config->uhd)
+ uhd_close();
+#endif
+
+#ifdef HAVE_SOAPY
+ if (sdr_config->soapy)
+ soapy_close();
+#endif
+
+ if (sdr) {
+ free(sdr->modbuff);
+ free(sdr->modbuff_I);
+ free(sdr->modbuff_Q);
+ free(sdr->wavespl0);
+ free(sdr->wavespl1);
+ wave_destroy_record(&sdr->wave_rx_rec);
+ wave_destroy_record(&sdr->wave_tx_rec);
+ wave_destroy_playback(&sdr->wave_rx_play);
+ wave_destroy_playback(&sdr->wave_tx_play);
+ if (sdr->chan) {
+ int c;
+
+ for (c = 0; c < sdr->channels; c++) {
+ fm_mod_exit(&sdr->chan[c].mod);
+ fm_demod_exit(&sdr->chan[c].demod);
+ }
+ if (sdr->paging_channel)
+ fm_mod_exit(&sdr->chan[sdr->paging_channel].mod);
+ free(sdr->chan);
+ }
+ free(sdr);
+ sdr = NULL;
+ }
+}
+
+int sdr_write(void *inst, sample_t **samples, uint8_t **power, int num, enum paging_signal __attribute__((unused)) *paging_signal, int *on, int channels)
+{
+ sdr_t *sdr = (sdr_t *)inst;
+ float *buff = NULL;
+ int c, s, ss;
+ int sent = 0;
+
+ if (num > sdr->latspl) {
+ fprintf(stderr, "exceeding maximum size given by sdr_latspl, please fix!\n");
+ abort();
+ }
+ if (channels != sdr->channels && channels != 0) {
+ PDEBUG(DSDR, DEBUG_ERROR, "Invalid number of channels, please fix!\n");
+ abort();
+ }
+
+ /* process all channels */
+ if (channels) {
+ buff = sdr->modbuff;
+ memset(buff, 0, sizeof(*buff) * num * 2);
+ for (c = 0; c < channels; c++) {
+ /* switch to paging channel, if requested */
+ if (on[c] && sdr->paging_channel)
+ fm_modulate_complex(&sdr->chan[sdr->paging_channel].mod, samples[c], power[c], num, buff);
+ else
+ fm_modulate_complex(&sdr->chan[c].mod, samples[c], power[c], num, buff);
+ }
+ } else {
+ buff = (float *)samples;
+ }
+
+ if (sdr->wave_tx_rec.fp) {
+ sample_t *spl_list[2] = { sdr->wavespl0, sdr->wavespl1 };
+ for (s = 0, ss = 0; s < num; s++) {
+ spl_list[0][s] = buff[ss++];
+ spl_list[1][s] = buff[ss++];
+ }
+ wave_write(&sdr->wave_tx_rec, spl_list, num);
+ }
+ if (sdr->wave_tx_play.fp) {
+ sample_t *spl_list[2] = { sdr->wavespl0, sdr->wavespl1 };
+ wave_read(&sdr->wave_tx_play, spl_list, num);
+ for (s = 0, ss = 0; s < num; s++) {
+ buff[ss++] = spl_list[0][s];
+ buff[ss++] = spl_list[1][s];
+ }
+ }
+
+ if (sdr->threads) {
+ /* store data towards SDR in ring buffer */
+ int fill, space, in;
+
+ fill = (sdr->thread_write.in - sdr->thread_write.out + sdr->thread_write.buffer_size) % sdr->thread_write.buffer_size;
+ space = (sdr->thread_write.out - sdr->thread_write.in - 2 + sdr->thread_write.buffer_size) % sdr->thread_write.buffer_size;
+
+ /* debug fill level */
+ if (fill > sdr->thread_write.max_fill)
+ sdr->thread_write.max_fill = fill;
+ if (sdr->thread_write.max_fill_timer == 0.0)
+ sdr->thread_write.max_fill_timer = get_time();
+ if (get_time() - sdr->thread_write.max_fill_timer > 1.0) {
+ double delay;
+ delay = (double)sdr->thread_write.max_fill / 2.0 / (double)sdr->samplerate;
+ sdr->thread_write.max_fill = 0;
+ sdr->thread_write.max_fill_timer += 1.0;
+ PDEBUG(DSDR, DEBUG_DEBUG, "write delay = %.3f ms\n", delay * 1000.0);
+ }
+
+ if (space < num * 2) {
+ PDEBUG(DSDR, DEBUG_ERROR, "Write SDR buffer overflow!\n");
+ num = space / 2;
+ }
+#ifdef DEBUG_BUFFER
+ printf("Writing %d samples to write buffer.\n", num);
+#endif
+ in = sdr->thread_write.in;
+ for (s = 0, ss = 0; s < num; s++) {
+ sdr->thread_write.buffer[in++] = buff[ss++];
+ sdr->thread_write.buffer[in++] = buff[ss++];
+ in %= sdr->thread_write.buffer_size;
+ }
+ sdr->thread_write.in = in;
+ sent = num;
+ } else {
+#ifdef HAVE_UHD
+ if (sdr_config->uhd)
+ sent = uhd_send(buff, num);
+#endif
+#ifdef HAVE_SOAPY
+ if (sdr_config->soapy)
+ sent = soapy_send(buff, num);
+#endif
+ if (sent < 0)
+ return sent;
+ }
+
+ return sent;
+}
+
+int sdr_read(void *inst, sample_t **samples, int num, int channels, double *rf_level_db)
+{
+ sdr_t *sdr = (sdr_t *)inst;
+ float *buff = NULL;
+ int count = 0;
+ int c, s, ss;
+
+ if (num > sdr->latspl) {
+ fprintf(stderr, "exceeding maximum size given by sdr_latspl, please fix!\n");
+ abort();
+ }
+
+ if (channels) {
+ buff = sdr->modbuff;
+ } else {
+ buff = (float *)samples;
+ }
+
+ if (sdr->threads) {
+ /* load data from SDR out of ring buffer */
+ int fill, out;
+
+ fill = (sdr->thread_read.in - sdr->thread_read.out + sdr->thread_read.buffer_size) % sdr->thread_read.buffer_size;
+
+ /* debug fill level */
+ if (fill > sdr->thread_read.max_fill)
+ sdr->thread_read.max_fill = fill;
+ if (sdr->thread_read.max_fill_timer == 0.0)
+ sdr->thread_read.max_fill_timer = get_time();
+ if (get_time() - sdr->thread_read.max_fill_timer > 1.0) {
+ double delay;
+ delay = (double)sdr->thread_read.max_fill / 2.0 / (double)sdr_config->samplerate;
+ sdr->thread_read.max_fill = 0;
+ sdr->thread_read.max_fill_timer += 1.0;
+ PDEBUG(DSDR, DEBUG_DEBUG, "read delay = %.3f ms\n", delay * 1000.0);
+ }
+
+ if (fill / 2 / sdr->oversample < num)
+ num = fill / 2 / sdr->oversample;
+#ifdef DEBUG_BUFFER
+ printf("Reading %d samples from read buffer.\n", num);
+#endif
+ out = sdr->thread_read.out;
+ for (s = 0, ss = 0; s < num; s++) {
+ buff[ss++] = sdr->thread_read.buffer[out];
+ buff[ss++] = sdr->thread_read.buffer[out + 1];
+ out = (out + 2 * sdr->oversample) % sdr->thread_read.buffer_size;
+ }
+ sdr->thread_read.out = out;
+ count = num;
+ } else {
+#ifdef HAVE_UHD
+ if (sdr_config->uhd)
+ count = uhd_receive(buff, num);
+#endif
+#ifdef HAVE_SOAPY
+ if (sdr_config->soapy)
+ count = soapy_receive(buff, num);
+#endif
+ if (count <= 0)
+ return count;
+ }
+
+ if (sdr_rx_overflow) {
+ PDEBUG(DSDR, DEBUG_ERROR, "SDR RX overflow!\n");
+ sdr_rx_overflow = 0;
+ }
+
+ if (sdr->wave_rx_rec.fp) {
+ sample_t *spl_list[2] = { sdr->wavespl0, sdr->wavespl1 };
+ for (s = 0, ss = 0; s < count; s++) {
+ spl_list[0][s] = buff[ss++];
+ spl_list[1][s] = buff[ss++];
+ }
+ wave_write(&sdr->wave_rx_rec, spl_list, count);
+ }
+ if (sdr->wave_rx_play.fp) {
+ sample_t *spl_list[2] = { sdr->wavespl0, sdr->wavespl1 };
+ wave_read(&sdr->wave_rx_play, spl_list, count);
+ for (s = 0, ss = 0; s < count; s++) {
+ buff[ss++] = spl_list[0][s];
+ buff[ss++] = spl_list[1][s];
+ }
+ }
+ display_iq(buff, count);
+ display_spectrum(buff, count);
+
+ if (channels) {
+ for (c = 0; c < channels; c++) {
+ fm_demodulate_complex(&sdr->chan[c].demod, samples[c], count, buff, sdr->modbuff_I, sdr->modbuff_Q);
+ sender_t *sender = get_sender_by_empfangsfrequenz(sdr->chan[c].rx_frequency);
+ if (!sender || !count)
+ continue;
+ double min, max, avg;
+ avg = 0.0;
+ for (s = 0; s < count; s++) {
+ /* average the square length of vector */
+ avg += sdr->modbuff_I[s] * sdr->modbuff_I[s] + sdr->modbuff_Q[s] * sdr->modbuff_Q[s];
+ }
+ avg = sqrt(avg /(double)count); /* RMS */
+ avg = log10(avg) * 20;
+ display_measurements_update(sdr->chan[c].dmp_rf_level, avg, 0.0);
+ rf_level_db[c] = avg;
+ min = 0.0;
+ max = 0.0;
+ avg = 0.0;
+ for (s = 0; s < count; s++) {
+ avg += samples[c][s];
+ if (s == 0 || samples[c][s] > max)
+ max = samples[c][s];
+ if (s == 0 || samples[c][s] < min)
+ min = samples[c][s];
+ }
+ avg /= (double)count;
+ display_measurements_update(sdr->chan[c].dmp_freq_offset, avg / 1000.0, 0.0);
+ /* use half min and max, because we want the deviation above/below (+-) center frequency. */
+ display_measurements_update(sdr->chan[c].dmp_deviation, min / 2.0 / 1000.0, max / 2.0 / 1000.0);
+ }
+ }
+
+ return count;
+}
+
+/* how much do we need to send (in audio sample duration) to get the target delay (latspl) */
+int sdr_get_tosend(void *inst, int latspl)
+{
+ sdr_t *sdr = (sdr_t *)inst;
+ int count = 0;
+
+#ifdef HAVE_UHD
+ if (sdr_config->uhd)
+ count = uhd_get_tosend(latspl * sdr->oversample);
+#endif
+#ifdef HAVE_SOAPY
+ if (sdr_config->soapy)
+ count = soapy_get_tosend(latspl * sdr->oversample);
+#endif
+ if (count < 0)
+ return count;
+ count /= sdr->oversample;
+
+ if (sdr->threads) {
+ /* substract what we have in write buffer, because this is not jent sent to the SDR */
+ int fill;
+
+ fill = (sdr->thread_write.in - sdr->thread_write.out + sdr->thread_write.buffer_size) % sdr->thread_write.buffer_size;
+ count -= fill / 2;
+ if (count < 0)
+ count = 0;
+ }
+
+ return count;
+}
+
+
diff --git a/src/libsdr/sdr.h b/src/libsdr/sdr.h
new file mode 100644
index 0000000..360f424
--- /dev/null
+++ b/src/libsdr/sdr.h
@@ -0,0 +1,8 @@
+
+int sdr_start(void *inst);
+void *sdr_open(const char *audiodev, double *tx_frequency, double *rx_frequency, int channels, double paging_frequency, int samplerate, int latspl, double bandwidth, double sample_deviation);
+void sdr_close(void *inst);
+int sdr_write(void *inst, sample_t **samples, uint8_t **power, int num, enum paging_signal *paging_signal, int *on, int channels);
+int sdr_read(void *inst, sample_t **samples, int num, int channels, double *rf_level_db);
+int sdr_get_tosend(void *inst, int latspl);
+
diff --git a/src/libsdr/sdr_config.c b/src/libsdr/sdr_config.c
new file mode 100644
index 0000000..0ab24bf
--- /dev/null
+++ b/src/libsdr/sdr_config.c
@@ -0,0 +1,262 @@
+/* Config for SDR
+ *
+ * (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/>.
+ */
+
+enum paging_signal;
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <getopt.h>
+#include "../common/sample.h"
+#include "sdr.h"
+#include "sdr_config.h"
+
+static int got_init = 0;
+extern int use_sdr;
+sdr_config_t *sdr_config = NULL;
+
+void sdr_config_init(void)
+{
+ sdr_config = calloc(1, sizeof(*sdr_config));
+ memset(sdr_config, 0, sizeof(*sdr_config));
+ sdr_config->device_args = "";
+ sdr_config->stream_args = "";
+ sdr_config->tune_args = "";
+
+ got_init = 1;
+}
+
+void sdr_config_print_help(void)
+{
+ printf("\nSDR options:\n");
+ /* - - */
+#ifdef HAVE_UHD
+ printf(" --sdr-uhd\n");
+ printf(" Force UHD driver\n");
+#endif
+#ifdef HAVE_SOAPY
+ printf(" --sdr-soapy\n");
+ printf(" Force SoapySDR driver\n");
+#endif
+ printf(" --sdr-channel <channel #>\n");
+ printf(" Give channel number for multi channel SDR device (default = %d)\n", sdr_config->channel);
+ printf(" --sdr-device-args <args>\n");
+ printf(" --sdr-stream-args <args>\n");
+ printf(" --sdr-tune-args <args>\n");
+ printf(" Optional SDR device arguments, seperated by comma\n");
+ printf(" e.g. --sdr-device-args <key>=<value>[,<key>=<value>[,...]]\n");
+ printf(" --sdr-samplerate <samplerate>\n");
+ printf(" Sample rate to use with SDR. By default it equals the regular sample\n");
+ printf(" rate.\n");
+ printf(" --sdr-bandwidth <bandwidth>\n");
+ printf(" Give IF filter bandwidth to use. If not, sample rate is used.\n");
+ printf(" --sdr-rx-antenna <name>\n");
+ printf(" SDR device's RX antenna name, use 'list' to get a list\n");
+ printf(" --sdr-tx-antenna <name>\n");
+ printf(" SDR device's TX antenna name, use 'list' to get a list\n");
+ printf(" --sdr-rx-gain <gain>\n");
+ printf(" SDR device's RX gain in dB (default = %.1f)\n", sdr_config->rx_gain);
+ printf(" --sdr-tx-gain <gain>\n");
+ printf(" SDR device's TX gain in dB (default = %.1f)\n", sdr_config->tx_gain);
+ printf(" --write-iq-rx-wave <file>\n");
+ printf(" Write received IQ data to given wave file.\n");
+ printf(" --write-iq-tx-wave <file>\n");
+ printf(" Write transmitted IQ data to given wave file.\n");
+ printf(" --read-iq-rx-wave <file>\n");
+ printf(" Replace received IQ data by given wave file.\n");
+ printf(" --read-iq-tx-wave <file>\n");
+ printf(" Replace transmitted IQ data by given wave file.\n");
+ printf(" --sdr-swap-links\n");
+ printf(" Swap RX and TX frequencies for loopback tests over the air.\n");
+#ifdef HAVE_UHD
+ printf(" --sdr-uhd-tx-timestamps\n");
+ printf(" Use TX timestamps on UHD device. (May not work with some devices!)\n");
+#endif
+}
+
+void sdr_config_print_hotkeys(void)
+{
+ printf("Press 'q' key to toggle display of RX I/Q vector.\n");
+ printf("Press 's' key to toggle display of RX spectrum.\n");
+}
+
+#define OPT_SDR_UHD 1500
+#define OPT_SDR_SOAPY 1501
+#define OPT_SDR_CHANNEL 1502
+#define OPT_SDR_DEVICE_ARGS 1503
+#define OPT_SDR_STREAM_ARGS 1504
+#define OPT_SDR_TUNE_ARGS 1505
+#define OPT_SDR_RX_ANTENNA 1506
+#define OPT_SDR_TX_ANTENNA 1507
+#define OPT_SDR_RX_GAIN 1508
+#define OPT_SDR_TX_GAIN 1509
+#define OPT_SDR_SAMPLERATE 1510
+#define OPT_SDR_BANDWIDTH 1511
+#define OPT_WRITE_IQ_RX_WAVE 1512
+#define OPT_WRITE_IQ_TX_WAVE 1513
+#define OPT_READ_IQ_RX_WAVE 1514
+#define OPT_READ_IQ_TX_WAVE 1515
+#define OPT_SDR_SWAP_LINKS 1516
+#define OPT_SDR_UHD_TX_TS 1517
+
+struct option sdr_config_long_options[] = {
+ {"sdr-uhd", 0, 0, OPT_SDR_UHD},
+ {"sdr-soapy", 0, 0, OPT_SDR_SOAPY},
+ {"sdr-channel", 1, 0, OPT_SDR_CHANNEL},
+ {"sdr-device-args", 1, 0, OPT_SDR_DEVICE_ARGS},
+ {"sdr-stream-args", 1, 0, OPT_SDR_STREAM_ARGS},
+ {"sdr-tune-args", 1, 0, OPT_SDR_TUNE_ARGS},
+ {"sdr-samplerate", 1, 0, OPT_SDR_SAMPLERATE},
+ {"sdr-bandwidth", 1, 0, OPT_SDR_BANDWIDTH},
+ {"sdr-rx-antenna", 1, 0, OPT_SDR_RX_ANTENNA},
+ {"sdr-tx-antenna", 1, 0, OPT_SDR_TX_ANTENNA},
+ {"sdr-rx-gain", 1, 0, OPT_SDR_RX_GAIN},
+ {"sdr-tx-gain", 1, 0, OPT_SDR_TX_GAIN},
+ {"write-iq-rx-wave", 1, 0, OPT_WRITE_IQ_RX_WAVE},
+ {"write-iq-tx-wave", 1, 0, OPT_WRITE_IQ_TX_WAVE},
+ {"read-iq-rx-wave", 1, 0, OPT_READ_IQ_RX_WAVE},
+ {"read-iq-tx-wave", 1, 0, OPT_READ_IQ_TX_WAVE},
+ {"sdr-swap-links", 0, 0, OPT_SDR_SWAP_LINKS},
+ {"sdr-uhd-tx-timestamps", 0, 0, OPT_SDR_UHD_TX_TS},
+ {0, 0, 0, 0}
+};
+
+const char *sdr_config_optstring = "";
+
+int sdr_config_opt_switch(int c, int *skip_args)
+{
+ switch (c) {
+ case OPT_SDR_UHD:
+#ifdef HAVE_UHD
+ sdr_config->uhd = 1;
+ use_sdr = 1;
+#else
+ fprintf(stderr, "UHD SDR support not compiled in!\n");
+ exit(0);
+#endif
+ *skip_args += 1;
+ break;
+ case OPT_SDR_SOAPY:
+#ifdef HAVE_SOAPY
+ sdr_config->soapy = 1;
+ use_sdr = 1;
+#else
+ fprintf(stderr, "SoapySDR support not compiled in!\n");
+ exit(0);
+#endif
+ *skip_args += 1;
+ break;
+ case OPT_SDR_CHANNEL:
+ sdr_config->channel = atoi(optarg);
+ *skip_args += 2;
+ break;
+ case OPT_SDR_DEVICE_ARGS:
+ sdr_config->device_args = strdup(optarg);
+ *skip_args += 2;
+ break;
+ case OPT_SDR_STREAM_ARGS:
+ sdr_config->stream_args = strdup(optarg);
+ *skip_args += 2;
+ break;
+ case OPT_SDR_TUNE_ARGS:
+ sdr_config->tune_args = strdup(optarg);
+ *skip_args += 2;
+ break;
+ case OPT_SDR_SAMPLERATE:
+ sdr_config->samplerate = atoi(optarg);
+ *skip_args += 2;
+ break;
+ case OPT_SDR_BANDWIDTH:
+ sdr_config->bandwidth = atof(optarg);
+ *skip_args += 2;
+ break;
+ case OPT_SDR_RX_ANTENNA:
+ sdr_config->rx_antenna = strdup(optarg);
+ *skip_args += 2;
+ break;
+ case OPT_SDR_TX_ANTENNA:
+ sdr_config->tx_antenna = strdup(optarg);
+ *skip_args += 2;
+ break;
+ case OPT_SDR_RX_GAIN:
+ sdr_config->rx_gain = atof(optarg);
+ *skip_args += 2;
+ break;
+ case OPT_SDR_TX_GAIN:
+ sdr_config->tx_gain = atof(optarg);
+ *skip_args += 2;
+ break;
+ case OPT_WRITE_IQ_RX_WAVE:
+ sdr_config->write_iq_rx_wave = strdup(optarg);
+ *skip_args += 2;
+ break;
+ case OPT_WRITE_IQ_TX_WAVE:
+ sdr_config->write_iq_tx_wave = strdup(optarg);
+ *skip_args += 2;
+ break;
+ case OPT_READ_IQ_RX_WAVE:
+ sdr_config->read_iq_rx_wave = strdup(optarg);
+ *skip_args += 2;
+ break;
+ case OPT_READ_IQ_TX_WAVE:
+ sdr_config->read_iq_tx_wave = strdup(optarg);
+ *skip_args += 2;
+ break;
+ case OPT_SDR_SWAP_LINKS:
+ sdr_config->swap_links = 1;
+ *skip_args += 1;
+ break;
+ case OPT_SDR_UHD_TX_TS:
+ sdr_config->uhd_tx_timestamps = 1;
+ *skip_args += 1;
+ break;
+ default:
+ return -1;
+ }
+
+ return 0;
+}
+
+int sdr_configure(int samplerate)
+{
+ if (!got_init) {
+ fprintf(stderr, "sdr_config_init was not called, please fix!\n");
+ abort();
+ }
+
+ /* no sdr selected -> return 0 */
+ if (!sdr_config->uhd && !sdr_config->soapy)
+ return 0;
+
+ if ((sdr_config->uhd == 1 && sdr_config->soapy == 1)) {
+ fprintf(stderr, "You must choose which one you want: --sdr-uhd or --sdr-soapy\n");
+ exit(0);
+ }
+
+ if (sdr_config->samplerate == 0)
+ sdr_config->samplerate = samplerate;
+ if (sdr_config->bandwidth == 0.0)
+ sdr_config->bandwidth = (double)sdr_config->samplerate;
+
+ /* sdr selected -> return 1 */
+ return 1;
+}
+
+
diff --git a/src/libsdr/sdr_config.h b/src/libsdr/sdr_config.h
new file mode 100644
index 0000000..b64424d
--- /dev/null
+++ b/src/libsdr/sdr_config.h
@@ -0,0 +1,32 @@
+
+typedef struct sdr_config {
+ int uhd, /* select UHD API */
+ soapy; /* select Soapy SDR API */
+ int channel; /* channel number */
+ const char *device_args, /* arguments */
+ *stream_args,
+ *tune_args;
+ int samplerate; /* ADC/DAC sample rate */
+ double bandwidth; /* IF bandwidth */
+ double tx_gain, /* gain */
+ rx_gain;
+ const char *tx_antenna, /* list/override antennas */
+ *rx_antenna;
+ const char *write_iq_tx_wave; /* wave recording and playback */
+ const char *write_iq_rx_wave;
+ const char *read_iq_tx_wave;
+ const char *read_iq_rx_wave;
+ int swap_links; /* swap DL and UL frequency */
+ int uhd_tx_timestamps; /* use UHD time stamps */
+} sdr_config_t;
+
+extern sdr_config_t *sdr_config;
+
+void sdr_config_init(void);
+void sdr_config_print_help(void);
+void sdr_config_print_hotkeys(void);
+extern struct option sdr_config_long_options[];
+extern const char *sdr_config_optstring;
+int sdr_config_opt_switch(int c, int *skip_args);
+int sdr_configure(int samplerate);
+
diff --git a/src/libsdr/soapy.c b/src/libsdr/soapy.c
new file mode 100644
index 0000000..5def101
--- /dev/null
+++ b/src/libsdr/soapy.c
@@ -0,0 +1,468 @@
+/* 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 "../common/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, double tx_frequency, double rx_frequency, double rate, double tx_gain, double rx_gain, double bandwidth)
+{
+ double got_frequency, got_rate, got_gain, got_bandwidth;
+ const char *got_antenna;
+ 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;
+
+ /* create SoapySDR device */
+ sdr = SoapySDRDevice_make(&device_args);
+ if (!sdr) {
+ PDEBUG(DSOAPY, DEBUG_ERROR, "Failed to create SoapySDR\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;
+ }
+ }
+
+ 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;
+ }
+ }
+
+ /* 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;
+ }
+ }
+
+ 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 inital 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;
+}
+
diff --git a/src/libsdr/soapy.h b/src/libsdr/soapy.h
new file mode 100644
index 0000000..702890b
--- /dev/null
+++ b/src/libsdr/soapy.h
@@ -0,0 +1,8 @@
+
+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, double tx_frequency, double rx_frequency, double rate, double tx_gain, double rx_gain, double bandwidth);
+int soapy_start(void);
+void soapy_close(void);
+int soapy_send(float *buff, int num);
+int soapy_receive(float *buff, int max);
+int soapy_get_tosend(int latspl);
+
diff --git a/src/libsdr/uhd.c b/src/libsdr/uhd.c
new file mode 100644
index 0000000..185fdf6
--- /dev/null
+++ b/src/libsdr/uhd.c
@@ -0,0 +1,585 @@
+/* UHD 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 <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+#include <math.h>
+#include <uhd.h>
+#include <uhd/usrp/usrp.h>
+#include "uhd.h"
+#include "../common/debug.h"
+
+/* use to TX time stamp */
+//#define TX_TIMESTAMP
+
+extern int sdr_rx_overflow;
+
+static uhd_usrp_handle usrp = NULL;
+static uhd_tx_streamer_handle tx_streamer = NULL;
+static uhd_rx_streamer_handle rx_streamer = NULL;
+static uhd_tx_metadata_handle tx_metadata = NULL;
+static uhd_rx_metadata_handle rx_metadata = NULL;
+static uhd_tune_request_t tune_request;
+static uhd_tune_result_t tune_result;
+static uhd_stream_args_t stream_args;
+static uhd_stream_cmd_t stream_cmd;
+static size_t tx_samps_per_buff, rx_samps_per_buff;
+static double samplerate;
+static time_t rx_time_secs = 0;
+static double rx_time_fract_sec = 0.0;
+static time_t tx_time_secs = 0;
+static double tx_time_fract_sec = 0.0;
+static int tx_timestamps;
+
+int uhd_open(size_t channel, const char *_device_args, const char *_stream_args, const char *_tune_args, const char *tx_antenna, const char *rx_antenna, double tx_frequency, double rx_frequency, double rate, double tx_gain, double rx_gain, double bandwidth, int _tx_timestamps)
+{
+ uhd_error error;
+ double got_frequency, got_rate, got_gain, got_bandwidth;
+ char got_antenna[64];
+
+ samplerate = rate;
+ tx_timestamps = _tx_timestamps;
+
+ PDEBUG(DUHD, DEBUG_INFO, "Using device args \"%s\"\n", _device_args);
+ PDEBUG(DUHD, DEBUG_INFO, "Using stream args \"%s\"\n", _stream_args);
+ PDEBUG(DUHD, DEBUG_INFO, "Using tune args \"%s\"\n", _tune_args);
+
+ /* create USRP */
+ PDEBUG(DUHD, DEBUG_INFO, "Creating USRP with args \"%s\"...\n", _device_args);
+ error = uhd_usrp_make(&usrp, _device_args);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to create USRP\n");
+ uhd_close();
+ return -EIO;
+ }
+
+ if (tx_frequency) {
+ /* antenna */
+ if (tx_antenna && tx_antenna[0]) {
+ if (!strcasecmp(tx_antenna, "list")) {
+ uhd_string_vector_handle antennas;
+ size_t antennas_length;
+ int i;
+ error = uhd_string_vector_make(&antennas);
+ if (error) {
+ tx_vector_error:
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to hande UHD vector, please fix!\n");
+ uhd_close();
+ return -EIO;
+ }
+ error = uhd_usrp_get_tx_antennas(usrp, channel, &antennas);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to request list of TX antennas!\n");
+ uhd_close();
+ return -EIO;
+ }
+ error = uhd_string_vector_size(antennas, &antennas_length);
+ if (error)
+ goto tx_vector_error;
+ for (i = 0; i < (int)antennas_length; i++) {
+ error = uhd_string_vector_at(antennas, i, got_antenna, sizeof(got_antenna));
+ if (error)
+ goto tx_vector_error;
+ PDEBUG(DUHD, DEBUG_NOTICE, "TX Antenna: '%s'\n", got_antenna);
+ }
+ uhd_string_vector_free(&antennas);
+ error = uhd_usrp_get_tx_antenna(usrp, channel, got_antenna, sizeof(got_antenna));
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to get TX antenna\n");
+ uhd_close();
+ return -EINVAL;
+ }
+ PDEBUG(DUHD, DEBUG_NOTICE, "Default TX Antenna: '%s'\n", got_antenna);
+ uhd_close();
+ return 1;
+ }
+ error = uhd_usrp_set_tx_antenna(usrp, tx_antenna, channel);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to set TX antenna to '%s'\n", tx_antenna);
+ uhd_close();
+ return -EIO;
+ }
+ error = uhd_usrp_get_tx_antenna(usrp, channel, got_antenna, sizeof(got_antenna));
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to get TX antenna\n");
+ uhd_close();
+ return -EINVAL;
+ }
+ if (!!strcasecmp(tx_antenna, got_antenna)) {
+ PDEBUG(DUHD, DEBUG_NOTICE, "Given TX antenna '%s' was accepted, but driver claims to use '%s'\n", tx_antenna, got_antenna);
+ uhd_close();
+ return -EINVAL;
+ }
+ }
+
+ /* create streamers */
+ error = uhd_tx_streamer_make(&tx_streamer);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to create TX streamer\n");
+ uhd_close();
+ return -EIO;
+ }
+
+ /* set rate */
+ error = uhd_usrp_set_tx_rate(usrp, rate, channel);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to set TX rate to %.0f Hz\n", rate);
+ uhd_close();
+ return -EIO;
+ }
+
+ /* see what rate actually is */
+ error = uhd_usrp_get_tx_rate(usrp, channel, &got_rate);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to get TX rate\n");
+ uhd_close();
+ return -EIO;
+ }
+ if (fabs(got_rate - rate) > 0.001) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Given TX rate %.0f Hz is not supported, try %.0f Hz\n", rate, got_rate);
+ uhd_close();
+ return -EINVAL;
+ }
+
+ /* set gain */
+ error = uhd_usrp_set_tx_gain(usrp, tx_gain, channel, "");
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to set TX gain to %.0f\n", tx_gain);
+ uhd_close();
+ return -EIO;
+ }
+
+ /* see what gain actually is */
+ error = uhd_usrp_get_tx_gain(usrp, channel, "", &got_gain);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to get TX gain\n");
+ uhd_close();
+ return -EIO;
+ }
+ if (fabs(got_gain - tx_gain) > 0.001) {
+ PDEBUG(DUHD, DEBUG_NOTICE, "Given TX gain %.0f is not supported, we use %.0f\n", tx_gain, got_gain);
+ tx_gain = got_gain;
+ }
+
+ /* set frequency */
+ memset(&tune_request, 0, sizeof(tune_request));
+ tune_request.target_freq = tx_frequency;
+ tune_request.rf_freq_policy = UHD_TUNE_REQUEST_POLICY_AUTO;
+ tune_request.dsp_freq_policy = UHD_TUNE_REQUEST_POLICY_AUTO;
+ tune_request.args = strdup(_tune_args);
+ error = uhd_usrp_set_tx_freq(usrp, &tune_request, channel, &tune_result);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to set TX frequeny to %.0f Hz\n", tx_frequency);
+ uhd_close();
+ return -EIO;
+ }
+
+ /* see what frequency actually is */
+ error = uhd_usrp_get_tx_freq(usrp, channel, &got_frequency);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to get TX frequency\n");
+ uhd_close();
+ return -EIO;
+ }
+ if (fabs(got_frequency - tx_frequency) > 100.0) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Given TX frequency %.0f Hz is not supported, try %.0f Hz\n", tx_frequency, got_frequency);
+ uhd_close();
+ return -EINVAL;
+ }
+
+ /* set bandwidth */
+ if (uhd_usrp_set_tx_bandwidth(usrp, bandwidth, channel) != 0) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to set TX bandwidth to %.0f Hz\n", bandwidth);
+ uhd_close();
+ return -EIO;
+ }
+
+ /* see what bandwidth actually is */
+ error = uhd_usrp_get_tx_bandwidth(usrp, channel, &got_bandwidth);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to get TX bandwidth\n");
+ uhd_close();
+ return -EIO;
+ }
+ if (fabs(got_bandwidth - bandwidth) > 0.001) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Given TX bandwidth %.0f Hz is not supported, try %.0f Hz\n", bandwidth, got_bandwidth);
+ uhd_close();
+ return -EINVAL;
+ }
+
+ /* set up streamer */
+ memset(&stream_args, 0, sizeof(stream_args));
+ stream_args.cpu_format = "fc32";
+ stream_args.otw_format = "sc16";
+ stream_args.args = strdup(_stream_args);
+ stream_args.channel_list = &channel;
+ stream_args.n_channels = 1;
+ error = uhd_usrp_get_tx_stream(usrp, &stream_args, tx_streamer);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to set TX streamer args\n");
+ uhd_close();
+ return -EIO;
+ }
+
+ /* get buffer sizes */
+ error = uhd_tx_streamer_max_num_samps(tx_streamer, &tx_samps_per_buff);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to get TX streamer sample buffer\n");
+ uhd_close();
+ return -EIO;
+ }
+ }
+
+ if (rx_frequency) {
+ /* antenna */
+ if (rx_antenna && rx_antenna[0]) {
+ if (!strcasecmp(rx_antenna, "list")) {
+ uhd_string_vector_handle antennas;
+ size_t antennas_length;
+ int i;
+ error = uhd_string_vector_make(&antennas);
+ if (error) {
+ rx_vector_error:
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to hande UHD vector, please fix!\n");
+ uhd_close();
+ return -EIO;
+ }
+ error = uhd_usrp_get_rx_antennas(usrp, channel, &antennas);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to request list of RX antennas!\n");
+ uhd_close();
+ return -EIO;
+ }
+ error = uhd_string_vector_size(antennas, &antennas_length);
+ if (error)
+ goto rx_vector_error;
+ for (i = 0; i < (int)antennas_length; i++) {
+ error = uhd_string_vector_at(antennas, i, got_antenna, sizeof(got_antenna));
+ if (error)
+ goto rx_vector_error;
+ PDEBUG(DUHD, DEBUG_NOTICE, "RX Antenna: '%s'\n", got_antenna);
+ }
+ uhd_string_vector_free(&antennas);
+ error = uhd_usrp_get_rx_antenna(usrp, channel, got_antenna, sizeof(got_antenna));
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to get RX antenna\n");
+ uhd_close();
+ return -EINVAL;
+ }
+ PDEBUG(DUHD, DEBUG_NOTICE, "Default RX Antenna: '%s'\n", got_antenna);
+ uhd_close();
+ return 1;
+ }
+ error = uhd_usrp_set_rx_antenna(usrp, rx_antenna, channel);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to set RX antenna to '%s'\n", rx_antenna);
+ uhd_close();
+ return -EIO;
+ }
+ error = uhd_usrp_get_rx_antenna(usrp, channel, got_antenna, sizeof(got_antenna));
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to get RX antenna\n");
+ uhd_close();
+ return -EINVAL;
+ }
+ if (!!strcasecmp(rx_antenna, got_antenna)) {
+ PDEBUG(DUHD, DEBUG_NOTICE, "Given RX antenna '%s' was accepted, but driver claims to use '%s'\n", rx_antenna, got_antenna);
+ uhd_close();
+ return -EINVAL;
+ }
+ }
+ /* create streamers */
+ error = uhd_rx_streamer_make(&rx_streamer);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to create RX streamer\n");
+ uhd_close();
+ return -EIO;
+ }
+
+ /* create metadata */
+ error = uhd_rx_metadata_make(&rx_metadata);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to create RX metadata\n");
+ uhd_close();
+ return -EIO;
+ }
+
+ /* set rate */
+ error = uhd_usrp_set_rx_rate(usrp, rate, channel);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to set RX rate to %.0f Hz\n", rate);
+ uhd_close();
+ return -EIO;
+ }
+
+ /* see what rate actually is */
+ error = uhd_usrp_get_rx_rate(usrp, channel, &got_rate);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to get RX rate\n");
+ uhd_close();
+ return -EIO;
+ }
+ if (fabs(got_rate - rate) > 0.001) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Given RX rate %.0f Hz is not supported, try %.0f Hz\n", rate, got_rate);
+ uhd_close();
+ return -EINVAL;
+ }
+
+ /* set gain */
+ error = uhd_usrp_set_rx_gain(usrp, rx_gain, channel, "");
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to set RX gain to %.0f\n", rx_gain);
+ uhd_close();
+ return -EIO;
+ }
+
+ /* see what gain actually is */
+ error = uhd_usrp_get_rx_gain(usrp, channel, "", &got_gain);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to get RX gain\n");
+ uhd_close();
+ return -EIO;
+ }
+ if (fabs(got_gain - rx_gain) > 0.001) {
+ PDEBUG(DUHD, DEBUG_NOTICE, "Given RX gain %.3f is not supported, we use %.3f\n", rx_gain, got_gain);
+ rx_gain = got_gain;
+ }
+
+ /* set frequency */
+ memset(&tune_request, 0, sizeof(tune_request));
+ tune_request.target_freq = rx_frequency;
+ tune_request.rf_freq_policy = UHD_TUNE_REQUEST_POLICY_AUTO;
+ tune_request.dsp_freq_policy = UHD_TUNE_REQUEST_POLICY_AUTO;
+ tune_request.args = strdup(_tune_args);
+ error = uhd_usrp_set_rx_freq(usrp, &tune_request, channel, &tune_result);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to set RX frequeny to %.0f Hz\n", rx_frequency);
+ uhd_close();
+ return -EIO;
+ }
+
+ /* see what frequency actually is */
+ error = uhd_usrp_get_rx_freq(usrp, channel, &got_frequency);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to get RX frequency\n");
+ uhd_close();
+ return -EIO;
+ }
+ if (fabs(got_frequency - rx_frequency) > 100.0) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Given RX frequency %.0f Hz is not supported, try %.0f Hz\n", rx_frequency, got_frequency);
+ uhd_close();
+ return -EINVAL;
+ }
+
+ /* set bandwidth */
+ if (uhd_usrp_set_rx_bandwidth(usrp, bandwidth, channel) != 0) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to set RX bandwidth to %.0f Hz\n", bandwidth);
+ uhd_close();
+ return -EIO;
+ }
+
+ /* see what bandwidth actually is */
+ error = uhd_usrp_get_rx_bandwidth(usrp, channel, &got_bandwidth);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to get RX bandwidth\n");
+ uhd_close();
+ return -EIO;
+ }
+ if (fabs(got_bandwidth - bandwidth) > 0.001) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Given RX bandwidth %.0f Hz is not supported, try %.0f Hz\n", bandwidth, got_bandwidth);
+ uhd_close();
+ return -EINVAL;
+ }
+
+ /* set up streamer */
+ memset(&stream_args, 0, sizeof(stream_args));
+ stream_args.cpu_format = "fc32";
+ stream_args.otw_format = "sc16";
+ stream_args.args = strdup(_stream_args);
+ stream_args.channel_list = &channel;
+ stream_args.n_channels = 1;
+ error = uhd_usrp_get_rx_stream(usrp, &stream_args, rx_streamer);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to set RX streamer args\n");
+ uhd_close();
+ return -EIO;
+ }
+
+ /* get buffer sizes */
+ error = uhd_rx_streamer_max_num_samps(rx_streamer, &rx_samps_per_buff);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to get RX streamer sample buffer\n");
+ uhd_close();
+ return -EIO;
+ }
+ }
+
+ return 0;
+}
+
+/* start streaming */
+int uhd_start(void)
+{
+ uhd_error error;
+
+ /* enable rx stream */
+ memset(&stream_cmd, 0, sizeof(stream_cmd));
+ stream_cmd.stream_mode = UHD_STREAM_MODE_START_CONTINUOUS;
+ stream_cmd.stream_now = true;
+ error = uhd_rx_streamer_issue_stream_cmd(rx_streamer, &stream_cmd);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to issue RX stream command\n");
+ return -EIO;
+ }
+ return 0;
+}
+
+void uhd_close(void)
+{
+ PDEBUG(DUHD, DEBUG_DEBUG, "Clean up UHD\n");
+ if (tx_metadata)
+ uhd_tx_metadata_free(&tx_metadata);
+ if (rx_metadata)
+ uhd_rx_metadata_free(&rx_metadata);
+ if (tx_streamer)
+ uhd_tx_streamer_free(&tx_streamer);
+ if (rx_streamer)
+ uhd_rx_streamer_free(&rx_streamer);
+ if (usrp)
+ uhd_usrp_free(&usrp);
+}
+
+int uhd_send(float *buff, int num)
+{
+ const void *buffs_ptr[1];
+ int chunk;
+ size_t sent = 0, count;
+ uhd_error error;
+
+ while (num) {
+ chunk = num;
+ if (chunk > (int)tx_samps_per_buff)
+ chunk = (int)tx_samps_per_buff;
+ /* create tx metadata */
+ if (tx_timestamps)
+ error = uhd_tx_metadata_make(&tx_metadata, true, tx_time_secs, tx_time_fract_sec, false, false);
+ else
+ error = uhd_tx_metadata_make(&tx_metadata, false, 0, 0.0, false, false);
+ if (error)
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to create TX metadata\n");
+ buffs_ptr[0] = buff;
+ count = 0;
+ error = uhd_tx_streamer_send(tx_streamer, buffs_ptr, chunk, &tx_metadata, 1.0, &count);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to write to TX streamer\n");
+ break;
+ }
+ if (count == 0)
+ break;
+
+ /* increment time stamp */
+ tx_time_fract_sec += (double)count / samplerate;
+ while (tx_time_fract_sec >= 1.0) {
+ tx_time_secs++;
+ tx_time_fract_sec -= 1.0;
+ }
+//printf("adv=%.3f\n", ((double)tx_time_secs + tx_time_fract_sec) - ((double)rx_time_secs + rx_time_fract_sec));
+
+ sent += count;
+ buff += count * 2;
+ num -= count;
+ }
+
+ return sent;
+}
+
+/* read what we got, return 0, if buffer is empty, otherwise return the number of samples */
+int uhd_receive(float *buff, int max)
+{
+ void *buffs_ptr[1];
+ size_t got = 0, count;
+ uhd_error error;
+
+ while (1) {
+ if (max < (int)rx_samps_per_buff) {
+ /* no more space this time */
+ sdr_rx_overflow = 1;
+ break;
+ }
+ /* read RX stream */
+ buffs_ptr[0] = buff;
+ count = 0;
+ error = uhd_rx_streamer_recv(rx_streamer, buffs_ptr, rx_samps_per_buff, &rx_metadata, 0.0, false, &count);
+ if (error) {
+ PDEBUG(DUHD, DEBUG_ERROR, "Failed to read from UHD device.\n");
+ break;
+ }
+ if (count) {
+ /* get time stamp of received RX packet */
+ uhd_rx_metadata_time_spec(rx_metadata, &rx_time_secs, &rx_time_fract_sec);
+ /* commit received data to buffer */
+ got += count;
+ buff += count * 2;
+ max -= count;
+ } else {
+ /* got nothing this time */
+ break;
+ }
+ }
+
+ return got;
+}
+
+/* estimate number of samples that can be sent */
+int uhd_get_tosend(int latspl)
+{
+ double advance;
+ int tosend;
+
+ /* we need the rx time stamp to determine how much data is already sent in advance */
+ if (rx_time_secs == 0 && rx_time_fract_sec == 0.0)
+ return 0;
+
+ /* if we have not yet sent any data, we set initial tx time stamp */
+ if (tx_time_secs == 0 && tx_time_fract_sec == 0.0) {
+ tx_time_secs = rx_time_secs;
+ tx_time_fract_sec = rx_time_fract_sec;
+ if (tx_timestamps) {
+ tx_time_fract_sec += (double)latspl / samplerate;
+ if (tx_time_fract_sec >= 1.0) {
+ tx_time_fract_sec -= 1.0;
+ tx_time_secs++;
+ }
+ }
+ }
+
+ /* we check how advance our transmitted time stamp is */
+ advance = ((double)tx_time_secs + tx_time_fract_sec) - ((double)rx_time_secs + rx_time_fract_sec);
+ /* in case of underrun: */
+ if (advance < 0)
+ advance = 0;
+ tosend = latspl - (int)(advance * samplerate);
+ if (tosend < 0)
+ tosend = 0;
+
+ return tosend;
+}
+
diff --git a/src/libsdr/uhd.h b/src/libsdr/uhd.h
new file mode 100644
index 0000000..60eb94f
--- /dev/null
+++ b/src/libsdr/uhd.h
@@ -0,0 +1,8 @@
+
+int uhd_open(size_t channel, const char *_device_args, const char *_stream_args, const char *_tune_args, const char *tx_antenna, const char *rx_antenna, double tx_frequency, double rx_frequency, double rate, double tx_gain, double rx_gain, double bandwidth, int _tx_timestamps);
+int uhd_start(void);
+void uhd_close(void);
+int uhd_send(float *buff, int num);
+int uhd_receive(float *buff, int max);
+int uhd_get_tosend(int latspl);
+