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Implementing rtl_fm wrapper

This commit is contained in:
ezratl 2019-02-28 02:55:03 -05:00
parent b99c754600
commit 440084f0a7
13 changed files with 2443 additions and 4 deletions
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2
.gitignore vendored
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@ -242,3 +242,5 @@ ModelManifest.xml
# FAKE - F# Make
.fake/
/Unit Test/
*.vscode

8
piScan_backend/src/CMakeLists.txt
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@ -4,9 +4,10 @@ project (piScan_backend)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall")
set(CMAKE_BUILD_TYPE Debug)
add_executable(piScan_backend piScan_backend.cpp)
target_link_libraries(piScan_backend pthread dl)
include_directories(core drivers external scan server sigproc)
@ -16,5 +17,8 @@ add_subdirectory(external)
add_subdirectory(scan)
add_subdirectory(server)
add_subdirectory(sigproc)
add_subdirectory(tests)
target_link_libraries(piScan_backend core drivers external scan server sigproc pthread dl)
target_link_libraries(piScan_backend core drivers external scan server sigproc)

13
piScan_backend/src/drivers/CMakeLists.txt
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@ -1,4 +1,13 @@
add_library(drivers
Tuner.cpp
Tuner.h
rtl_fm.h
rtl_fm.c
)
option(DETACH_KERNEL_DRIVER "Detach kernel driver if loaded" OFF)
if (DETACH_KERNEL_DRIVER)
message (STATUS "Building with kernel driver detaching enabled")
add_definitions(-DDETACH_KERNEL_DRIVER=1)
else (DETACH_KERNEL_DRIVER)
message (STATUS "Building with kernel driver detaching disabled, use -DDETACH_KERNEL_DRIVER=ON to enable")
endif (DETACH_KERNEL_DRIVER)

1816
piScan_backend/src/drivers/rtl_fm.c Normal file
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File diff suppressed because it is too large Load Diff

35
piScan_backend/src/drivers/rtl_fm.h Normal file
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@ -0,0 +1,35 @@
#ifndef DRIVERS_RTL_FM_H_
#define DRIVERS_RTL_FM_H_
enum custom_atan {
STD,
FAST,
LUT,
ALE
};
enum mode_demod {
FM,
RAW,
AM,
USB,
LSB,
WBFM
};
#ifdef __cplusplus
extern "C" {
#endif
int rtl_fm_init(void* audioBuffer, size_t bufferSize, int sampleRate);
int rtl_fm_deinit();
int rtl_fm_setfreq(uint32_t freq);
int rtl_fm_setmode(enum mode_demod newMode);
int rtl_fm_get_rssi();
#ifdef __cplusplus
}
#endif
#endif

2
piScan_backend/src/external/CMakeLists.txt vendored
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@ -4,4 +4,6 @@ add_library(external
loguru.cpp
loguru.hpp
readerwriterqueue.h
convenience.h
convenience.c
)

337
piScan_backend/src/external/convenience.c vendored Normal file
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@ -0,0 +1,337 @@
/*
* Copyright (C) 2013-2014 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");}
if (on == 3) {
fprintf(stderr, "Enabled no-mod direct sampling mode.\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_ppm_eeprom(rtlsdr_dev_t *dev, int *ppm_error)
{
#define start_char ' '
#define stop_char 'p'
int i, r, len, status = -1;
char vendor[256], product[256], serial[256];
r = rtlsdr_get_usb_strings(dev, vendor, product, serial);
if (r) {
return r;
}
len = strlen(serial);
if (len <= 3) {
return -1;}
if (serial[len-1] != stop_char) {
return -1;}
serial[len-1] = '\0';
for (i=len-3; i>=0; i--) {
if (serial[i] != start_char) {
continue;}
fprintf(stderr, "PPM calibration found in eeprom.\n");
status = 0;
*ppm_error = atoi(serial + i + 1);
break;
}
serial[len-1] = stop_char;
return status;
}
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] = {0}, product[256] = {0}, serial[256] = {0};
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++) {
if (rtlsdr_get_device_usb_strings(i, vendor, product, serial) == 0) {
fprintf(stderr, " %d: %s, %s, SN: %s\n", i, vendor, product, serial);
} else {
fprintf(stderr, " %d: %s\n", i, "Failed to query data");
}
}
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

153
piScan_backend/src/external/convenience.h vendored Normal file
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@ -0,0 +1,153 @@
/*
* Copyright (C) 2013-2014 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 */
#include <rtl-sdr.h>
/*!
* Convert standard suffixes (k, M, G) to double
*
* \param s a string to be parsed
* \return double
*/
double atofs(char *s);
/*!
* Convert time suffixes (s, m, h) to double
*
* \param s a string to be parsed
* \return seconds as double
*/
double atoft(char *s);
/*!
* Convert percent suffixe (%) to double
*
* \param s a string to be parsed
* \return double
*/
double atofp(char *s);
/*!
* Find nearest supported gain
*
* \param dev the device handle given by rtlsdr_open()
* \param target_gain in tenths of a dB
* \return 0 on success
*/
int nearest_gain(rtlsdr_dev_t *dev, int target_gain);
/*!
* Set device frequency and report status on stderr
*
* \param dev the device handle given by rtlsdr_open()
* \param frequency in Hz
* \return 0 on success
*/
int verbose_set_frequency(rtlsdr_dev_t *dev, uint32_t frequency);
/*!
* Set device sample rate and report status on stderr
*
* \param dev the device handle given by rtlsdr_open()
* \param samp_rate in samples/second
* \return 0 on success
*/
int verbose_set_sample_rate(rtlsdr_dev_t *dev, uint32_t samp_rate);
/*!
* Enable or disable the direct sampling mode and report status on stderr
*
* \param dev the device handle given by rtlsdr_open()
* \param on 0 means disabled, 1 I-ADC input enabled, 2 Q-ADC input enabled
* \return 0 on success
*/
int verbose_direct_sampling(rtlsdr_dev_t *dev, int on);
/*!
* Enable offset tuning and report status on stderr
*
* \param dev the device handle given by rtlsdr_open()
* \return 0 on success
*/
int verbose_offset_tuning(rtlsdr_dev_t *dev);
/*!
* Enable auto gain and report status on stderr
*
* \param dev the device handle given by rtlsdr_open()
* \return 0 on success
*/
int verbose_auto_gain(rtlsdr_dev_t *dev);
/*!
* Set tuner gain and report status on stderr
*
* \param dev the device handle given by rtlsdr_open()
* \param gain in tenths of a dB
* \return 0 on success
*/
int verbose_gain_set(rtlsdr_dev_t *dev, int gain);
/*!
* Set the frequency correction value for the device and report status on stderr.
*
* \param dev the device handle given by rtlsdr_open()
* \param ppm_error correction value in parts per million (ppm)
* \return 0 on success
*/
int verbose_ppm_set(rtlsdr_dev_t *dev, int ppm_error);
/*!
* Attempts to extract a correction value from eeprom and store it to an int.
*
* \param dev the device handle given by rtlsdr_open()
* \param ppm_error correction value in parts per million (ppm)
* \return 0 on success
*/
int verbose_ppm_eeprom(rtlsdr_dev_t *dev, int *ppm_error);
/*!
* Reset buffer
*
* \param dev the device handle given by rtlsdr_open()
* \return 0 on success
*/
int verbose_reset_buffer(rtlsdr_dev_t *dev);
/*!
* Find the closest matching device.
*
* \param s a string to be parsed
* \return dev_index int, -1 on error
*/
int verbose_device_search(char *s);

2
piScan_backend/src/sigproc/CMakeLists.txt
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@ -1,4 +1,6 @@
add_library(sigproc
Demodulator.cpp
Demodulator.h
Tuner.cpp
Tuner.h
)

0
piScan_backend/src/drivers/Tuner.cpp → piScan_backend/src/sigproc/Tuner.cpp
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6
piScan_backend/src/drivers/Tuner.h → piScan_backend/src/sigproc/Tuner.h
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@ -38,4 +38,10 @@ public:
TunerStatus setSquelchLevel(int8_t newLevel);
};
class RtlTuner : public Tuner {
public:
private:
};
#endif /* DRIVERS_TUNER_H_ */

11
piScan_backend/src/tests/CMakeLists.txt
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@ -1,3 +1,14 @@
project(piScan_backend_tests)
add_executable(piScan_backend_tests test_ScannerStateMachine.cpp)
add_executable(test_RtlFm test_RtlFm.cpp)
option(DETACH_KERNEL_DRIVER "Detach kernel driver if loaded" OFF)
if (DETACH_KERNEL_DRIVER)
message (STATUS "Building with kernel driver detaching enabled")
add_definitions(-DDETACH_KERNEL_DRIVER=1)
else (DETACH_KERNEL_DRIVER)
message (STATUS "Building with kernel driver detaching disabled, use -DDETACH_KERNEL_DRIVER=ON to enable")
endif (DETACH_KERNEL_DRIVER)
target_link_libraries(test_RtlFm drivers external pthread rtlsdr)

62
piScan_backend/src/tests/test_RtlFm.cpp Normal file
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@ -0,0 +1,62 @@
/*
* test_RtlFm.cpp
*
* Created on: Feb 27, 2019
* Author: ezra
*/
#include <cstdlib>
#include <cstdint>
#include <ctime>
#include <iostream>
#include <unistd.h>
#include "rtl_fm.h"
using namespace std;
int main(int argc, char** argv){
cerr << "Starting rtl_fm test\n";
timespec time1, time2;
timespec_get(&time1, TIME_UTC);
if(rtl_fm_init((void*)0, (size_t)0, 12000))
return 1;
timespec_get(&time2, TIME_UTC);
fprintf(stderr, "%li\n", (time2.tv_nsec - time1.tv_nsec)/1000);
//usleep(3000000);
timespec_get(&time1, TIME_UTC);
while(rtl_fm_setfreq(162550000));
timespec_get(&time2, TIME_UTC);
fprintf(stderr, "%li\n", (time2.tv_nsec - time1.tv_nsec)/1000);
usleep(3000000);
timespec_get(&time1, TIME_UTC);
while(rtl_fm_setfreq(472087500));
timespec_get(&time2, TIME_UTC);
fprintf(stderr, "%li\n", (time2.tv_nsec - time1.tv_nsec)/1000);
//usleep(10000);
timespec_get(&time1, TIME_UTC);
while(rtl_fm_setfreq(453150000));
timespec_get(&time2, TIME_UTC);
fprintf(stderr, "%li\n", (time2.tv_nsec - time1.tv_nsec)/1000);
int freq = 0;
while(1){
cin >> freq;
if(freq == 0)
break;
else
while(rtl_fm_setfreq(freq));
}
rtl_fm_deinit();
return 0;
}