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-rw-r--r--src/convenience/convenience.c304
1 files changed, 304 insertions, 0 deletions
diff --git a/src/convenience/convenience.c b/src/convenience/convenience.c
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+++ b/src/convenience/convenience.c
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+/*
+ * Copyright (C) 2014 by Kyle Keen <keenerd@gmail.com>
+ *
+ * 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 2 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/>.
+ */
+
+/* a collection of user friendly tools
+ * todo: use strtol for more flexible int parsing
+ * */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifndef _WIN32
+#include <unistd.h>
+#else
+#include <windows.h>
+#include <fcntl.h>
+#include <io.h>
+#define _USE_MATH_DEFINES
+#endif
+
+#include <math.h>
+
+#include "rtl-sdr.h"
+
+double atofs(char *s)
+/* standard suffixes */
+{
+ char last;
+ int len;
+ double suff = 1.0;
+ len = strlen(s);
+ last = s[len-1];
+ s[len-1] = '\0';
+ switch (last) {
+ case 'g':
+ case 'G':
+ suff *= 1e3;
+ case 'm':
+ case 'M':
+ suff *= 1e3;
+ case 'k':
+ case 'K':
+ suff *= 1e3;
+ suff *= atof(s);
+ s[len-1] = last;
+ return suff;
+ }
+ s[len-1] = last;
+ return atof(s);
+}
+
+double atoft(char *s)
+/* time suffixes, returns seconds */
+{
+ char last;
+ int len;
+ double suff = 1.0;
+ len = strlen(s);
+ last = s[len-1];
+ s[len-1] = '\0';
+ switch (last) {
+ case 'h':
+ case 'H':
+ suff *= 60;
+ case 'm':
+ case 'M':
+ suff *= 60;
+ case 's':
+ case 'S':
+ suff *= atof(s);
+ s[len-1] = last;
+ return suff;
+ }
+ s[len-1] = last;
+ return atof(s);
+}
+
+double atofp(char *s)
+/* percent suffixes */
+{
+ char last;
+ int len;
+ double suff = 1.0;
+ len = strlen(s);
+ last = s[len-1];
+ s[len-1] = '\0';
+ switch (last) {
+ case '%':
+ suff *= 0.01;
+ suff *= atof(s);
+ s[len-1] = last;
+ return suff;
+ }
+ s[len-1] = last;
+ return atof(s);
+}
+
+int nearest_gain(rtlsdr_dev_t *dev, int target_gain)
+{
+ int i, r, err1, err2, count, nearest;
+ int* gains;
+ r = rtlsdr_set_tuner_gain_mode(dev, 1);
+ if (r < 0) {
+ fprintf(stderr, "WARNING: Failed to enable manual gain.\n");
+ return r;
+ }
+ count = rtlsdr_get_tuner_gains(dev, NULL);
+ if (count <= 0) {
+ return 0;
+ }
+ gains = malloc(sizeof(int) * count);
+ count = rtlsdr_get_tuner_gains(dev, gains);
+ nearest = gains[0];
+ for (i=0; i<count; i++) {
+ err1 = abs(target_gain - nearest);
+ err2 = abs(target_gain - gains[i]);
+ if (err2 < err1) {
+ nearest = gains[i];
+ }
+ }
+ free(gains);
+ return nearest;
+}
+
+int verbose_set_frequency(rtlsdr_dev_t *dev, uint32_t frequency)
+{
+ int r;
+ r = rtlsdr_set_center_freq(dev, frequency);
+ if (r < 0) {
+ fprintf(stderr, "WARNING: Failed to set center freq.\n");
+ } else {
+ fprintf(stderr, "Tuned to %u Hz.\n", frequency);
+ }
+ return r;
+}
+
+int verbose_set_sample_rate(rtlsdr_dev_t *dev, uint32_t samp_rate)
+{
+ int r;
+ r = rtlsdr_set_sample_rate(dev, samp_rate);
+ if (r < 0) {
+ fprintf(stderr, "WARNING: Failed to set sample rate.\n");
+ } else {
+ fprintf(stderr, "Sampling at %u S/s.\n", samp_rate);
+ }
+ return r;
+}
+
+int verbose_direct_sampling(rtlsdr_dev_t *dev, int on)
+{
+ int r;
+ r = rtlsdr_set_direct_sampling(dev, on);
+ if (r != 0) {
+ fprintf(stderr, "WARNING: Failed to set direct sampling mode.\n");
+ return r;
+ }
+ if (on == 0) {
+ fprintf(stderr, "Direct sampling mode disabled.\n");}
+ if (on == 1) {
+ fprintf(stderr, "Enabled direct sampling mode, input 1/I.\n");}
+ if (on == 2) {
+ fprintf(stderr, "Enabled direct sampling mode, input 2/Q.\n");}
+ return r;
+}
+
+int verbose_offset_tuning(rtlsdr_dev_t *dev)
+{
+ int r;
+ r = rtlsdr_set_offset_tuning(dev, 1);
+ if (r != 0) {
+ fprintf(stderr, "WARNING: Failed to set offset tuning.\n");
+ } else {
+ fprintf(stderr, "Offset tuning mode enabled.\n");
+ }
+ return r;
+}
+
+int verbose_auto_gain(rtlsdr_dev_t *dev)
+{
+ int r;
+ r = rtlsdr_set_tuner_gain_mode(dev, 0);
+ if (r != 0) {
+ fprintf(stderr, "WARNING: Failed to set tuner gain.\n");
+ } else {
+ fprintf(stderr, "Tuner gain set to automatic.\n");
+ }
+ return r;
+}
+
+int verbose_gain_set(rtlsdr_dev_t *dev, int gain)
+{
+ int r;
+ r = rtlsdr_set_tuner_gain_mode(dev, 1);
+ if (r < 0) {
+ fprintf(stderr, "WARNING: Failed to enable manual gain.\n");
+ return r;
+ }
+ r = rtlsdr_set_tuner_gain(dev, gain);
+ if (r != 0) {
+ fprintf(stderr, "WARNING: Failed to set tuner gain.\n");
+ } else {
+ fprintf(stderr, "Tuner gain set to %0.2f dB.\n", gain/10.0);
+ }
+ return r;
+}
+
+int verbose_ppm_set(rtlsdr_dev_t *dev, int ppm_error)
+{
+ int r;
+ if (ppm_error == 0) {
+ return 0;}
+ r = rtlsdr_set_freq_correction(dev, ppm_error);
+ if (r < 0) {
+ fprintf(stderr, "WARNING: Failed to set ppm error.\n");
+ } else {
+ fprintf(stderr, "Tuner error set to %i ppm.\n", ppm_error);
+ }
+ return r;
+}
+
+int verbose_reset_buffer(rtlsdr_dev_t *dev)
+{
+ int r;
+ r = rtlsdr_reset_buffer(dev);
+ if (r < 0) {
+ fprintf(stderr, "WARNING: Failed to reset buffers.\n");}
+ return r;
+}
+
+int verbose_device_search(char *s)
+{
+ int i, device_count, device, offset;
+ char *s2;
+ char vendor[256], product[256], serial[256];
+ device_count = rtlsdr_get_device_count();
+ if (!device_count) {
+ fprintf(stderr, "No supported devices found.\n");
+ return -1;
+ }
+ fprintf(stderr, "Found %d device(s):\n", device_count);
+ for (i = 0; i < device_count; i++) {
+ rtlsdr_get_device_usb_strings(i, vendor, product, serial);
+ fprintf(stderr, " %d: %s, %s, SN: %s\n", i, vendor, product, serial);
+ }
+ fprintf(stderr, "\n");
+ /* does string look like raw id number */
+ device = (int)strtol(s, &s2, 0);
+ if (s2[0] == '\0' && device >= 0 && device < device_count) {
+ fprintf(stderr, "Using device %d: %s\n",
+ device, rtlsdr_get_device_name((uint32_t)device));
+ return device;
+ }
+ /* does string exact match a serial */
+ for (i = 0; i < device_count; i++) {
+ rtlsdr_get_device_usb_strings(i, vendor, product, serial);
+ if (strcmp(s, serial) != 0) {
+ continue;}
+ device = i;
+ fprintf(stderr, "Using device %d: %s\n",
+ device, rtlsdr_get_device_name((uint32_t)device));
+ return device;
+ }
+ /* does string prefix match a serial */
+ for (i = 0; i < device_count; i++) {
+ rtlsdr_get_device_usb_strings(i, vendor, product, serial);
+ if (strncmp(s, serial, strlen(s)) != 0) {
+ continue;}
+ device = i;
+ fprintf(stderr, "Using device %d: %s\n",
+ device, rtlsdr_get_device_name((uint32_t)device));
+ return device;
+ }
+ /* does string suffix match a serial */
+ for (i = 0; i < device_count; i++) {
+ rtlsdr_get_device_usb_strings(i, vendor, product, serial);
+ offset = strlen(serial) - strlen(s);
+ if (offset < 0) {
+ continue;}
+ if (strncmp(s, serial+offset, strlen(s)) != 0) {
+ continue;}
+ device = i;
+ fprintf(stderr, "Using device %d: %s\n",
+ device, rtlsdr_get_device_name((uint32_t)device));
+ return device;
+ }
+ fprintf(stderr, "No matching devices found.\n");
+ return -1;
+}
+
+// vim: tabstop=8:softtabstop=8:shiftwidth=8:noexpandtab