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lora_pkt_fwd.c
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/*
/ _____) _ | |
( (____ _____ ____ _| |_ _____ ____| |__
\____ \| ___ | (_ _) ___ |/ ___) _ \
_____) ) ____| | | || |_| ____( (___| | | |
(______/|_____)_|_|_| \__)_____)\____)_| |_|
(C)2019 Semtech
Description:
Configure Lora concentrator and forward packets to a server
Use GPS for packet timestamping.
Send a becon at a regular interval without server intervention
License: Revised BSD License, see LICENSE.TXT file include in the project
*/
/* -------------------------------------------------------------------------- */
/* --- DEPENDANCIES --------------------------------------------------------- */
/* fix an issue between POSIX and C99 */
#if __STDC_VERSION__ >= 199901L
#define _XOPEN_SOURCE 600
#else
#define _XOPEN_SOURCE 500
#endif
#include <stdint.h> /* C99 types */
#include <stdbool.h> /* bool type */
#include <stdio.h> /* printf, fprintf, snprintf, fopen, fputs */
#include <inttypes.h> /* PRIx64, PRIu64... */
#include <string.h> /* memset */
#include <signal.h> /* sigaction */
#include <time.h> /* time, clock_gettime, strftime, gmtime */
#include <sys/time.h> /* timeval */
#include <unistd.h> /* getopt, access */
#include <stdlib.h> /* atoi, exit */
#include <errno.h> /* error messages */
#include <math.h> /* modf */
#include <sys/socket.h> /* socket specific definitions */
#include <netinet/in.h> /* INET constants and stuff */
#include <arpa/inet.h> /* IP address conversion stuff */
#include <netdb.h> /* gai_strerror */
#include <pthread.h>
#include "trace.h"
#include "jitqueue.h"
#include "parson.h"
#include "base64.h"
#include "loragw_hal.h"
#include "loragw_aux.h"
#include "loragw_reg.h"
#include "loragw_gps.h"
#include "loragw_sx1302.h"
/* -------------------------------------------------------------------------- */
/* --- PRIVATE MACROS ------------------------------------------------------- */
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
#define STRINGIFY(x) #x
#define STR(x) STRINGIFY(x)
#define RAND_RANGE(min, max) (rand() % (max + 1 - min) + min)
/* -------------------------------------------------------------------------- */
/* --- PRIVATE CONSTANTS ---------------------------------------------------- */
#ifndef VERSION_STRING
#define VERSION_STRING "undefined"
#endif
#define JSON_CONF_DEFAULT "global_conf.json"
#define JSON_CONF_LOCAL "local_conf.json"
#define DEFAULT_SERVER 127.0.0.1 /* hostname also supported */
#define DEFAULT_PORT_UP 1780
#define DEFAULT_PORT_DW 1782
#define DEFAULT_KEEPALIVE 5 /* default time interval for downstream keep-alive packet */
#define DEFAULT_STAT 30 /* default time interval for statistics */
#define PUSH_TIMEOUT_MS 100
#define PULL_TIMEOUT_MS 200
#define GPS_REF_MAX_AGE 30 /* maximum admitted delay in seconds of GPS loss before considering latest GPS sync unusable */
#define FETCH_SLEEP_MS 10 /* nb of ms waited when a fetch return no packets */
#define BEACON_POLL_MS 50 /* time in ms between polling of beacon TX status */
#define PROTOCOL_VERSION 2 /* v1.6 */
#define PROTOCOL_JSON_RXPK_FRAME_FORMAT 1
#define XERR_INIT_AVG 16 /* nb of measurements the XTAL correction is averaged on as initial value */
#define XERR_FILT_COEF 256 /* coefficient for low-pass XTAL error tracking */
#define PKT_PUSH_DATA 0
#define PKT_PUSH_ACK 1
#define PKT_PULL_DATA 2
#define PKT_PULL_RESP 3
#define PKT_PULL_ACK 4
#define PKT_TX_ACK 5
#define NB_PKT_MAX 255 /* max number of packets per fetch/send cycle */
#define MIN_LORA_PREAMB 6 /* minimum Lora preamble length for this application */
#define STD_LORA_PREAMB 8
#define MIN_FSK_PREAMB 3 /* minimum FSK preamble length for this application */
#define STD_FSK_PREAMB 5
#define STATUS_SIZE 200
#define TX_BUFF_SIZE ((540 * NB_PKT_MAX) + 30 + STATUS_SIZE)
#define ACK_BUFF_SIZE 64
#define UNIX_GPS_EPOCH_OFFSET 315964800 /* Number of seconds ellapsed between 01.Jan.1970 00:00:00
and 06.Jan.1980 00:00:00 */
#define DEFAULT_BEACON_FREQ_HZ 869525000
#define DEFAULT_BEACON_FREQ_NB 1
#define DEFAULT_BEACON_FREQ_STEP 0
#define DEFAULT_BEACON_DATARATE 9
#define DEFAULT_BEACON_BW_HZ 125000
#define DEFAULT_BEACON_POWER 14
#define DEFAULT_BEACON_INFODESC 0
/* -------------------------------------------------------------------------- */
/* --- PRIVATE TYPES -------------------------------------------------------- */
/* spectral scan */
typedef struct spectral_scan_s {
bool enable; /* enable spectral scan thread */
uint32_t freq_hz_start; /* first channel frequency, in Hz */
uint8_t nb_chan; /* number of channels to scan (200kHz between each channel) */
uint16_t nb_scan; /* number of scan points for each frequency scan */
uint32_t pace_s; /* number of seconds between 2 scans in the thread */
} spectral_scan_t;
/* -------------------------------------------------------------------------- */
/* --- PRIVATE VARIABLES (GLOBAL) ------------------------------------------- */
/* signal handling variables */
volatile bool exit_sig = false; /* 1 -> application terminates cleanly (shut down hardware, close open files, etc) */
volatile bool quit_sig = false; /* 1 -> application terminates without shutting down the hardware */
/* packets filtering configuration variables */
static bool fwd_valid_pkt = true; /* packets with PAYLOAD CRC OK are forwarded */
static bool fwd_error_pkt = false; /* packets with PAYLOAD CRC ERROR are NOT forwarded */
static bool fwd_nocrc_pkt = false; /* packets with NO PAYLOAD CRC are NOT forwarded */
/* network configuration variables */
static uint64_t lgwm = 0; /* Lora gateway MAC address */
static char serv_addr[64] = STR(DEFAULT_SERVER); /* address of the server (host name or IPv4/IPv6) */
static char serv_port_up[8] = STR(DEFAULT_PORT_UP); /* server port for upstream traffic */
static char serv_port_down[8] = STR(DEFAULT_PORT_DW); /* server port for downstream traffic */
static int keepalive_time = DEFAULT_KEEPALIVE; /* send a PULL_DATA request every X seconds, negative = disabled */
/* statistics collection configuration variables */
static unsigned stat_interval = DEFAULT_STAT; /* time interval (in sec) at which statistics are collected and displayed */
/* gateway <-> MAC protocol variables */
static uint32_t net_mac_h; /* Most Significant Nibble, network order */
static uint32_t net_mac_l; /* Least Significant Nibble, network order */
/* network sockets */
static int sock_up; /* socket for upstream traffic */
static int sock_down; /* socket for downstream traffic */
/* network protocol variables */
static struct timeval push_timeout_half = {0, (PUSH_TIMEOUT_MS * 500)}; /* cut in half, critical for throughput */
static struct timeval pull_timeout = {0, (PULL_TIMEOUT_MS * 1000)}; /* non critical for throughput */
/* hardware access control and correction */
pthread_mutex_t mx_concent = PTHREAD_MUTEX_INITIALIZER; /* control access to the concentrator */
static pthread_mutex_t mx_xcorr = PTHREAD_MUTEX_INITIALIZER; /* control access to the XTAL correction */
static bool xtal_correct_ok = false; /* set true when XTAL correction is stable enough */
static double xtal_correct = 1.0;
/* GPS configuration and synchronization */
static char gps_tty_path[64] = "\0"; /* path of the TTY port GPS is connected on */
static int gps_tty_fd = -1; /* file descriptor of the GPS TTY port */
static bool gps_enabled = false; /* is GPS enabled on that gateway ? */
/* GPS time reference */
static pthread_mutex_t mx_timeref = PTHREAD_MUTEX_INITIALIZER; /* control access to GPS time reference */
static bool gps_ref_valid; /* is GPS reference acceptable (ie. not too old) */
static struct tref time_reference_gps; /* time reference used for GPS <-> timestamp conversion */
/* Reference coordinates, for broadcasting (beacon) */
static struct coord_s reference_coord;
/* Enable faking the GPS coordinates of the gateway */
static bool gps_fake_enable; /* enable the feature */
/* measurements to establish statistics */
static pthread_mutex_t mx_meas_up = PTHREAD_MUTEX_INITIALIZER; /* control access to the upstream measurements */
static uint32_t meas_nb_rx_rcv = 0; /* count packets received */
static uint32_t meas_nb_rx_ok = 0; /* count packets received with PAYLOAD CRC OK */
static uint32_t meas_nb_rx_bad = 0; /* count packets received with PAYLOAD CRC ERROR */
static uint32_t meas_nb_rx_nocrc = 0; /* count packets received with NO PAYLOAD CRC */
static uint32_t meas_up_pkt_fwd = 0; /* number of radio packet forwarded to the server */
static uint32_t meas_up_network_byte = 0; /* sum of UDP bytes sent for upstream traffic */
static uint32_t meas_up_payload_byte = 0; /* sum of radio payload bytes sent for upstream traffic */
static uint32_t meas_up_dgram_sent = 0; /* number of datagrams sent for upstream traffic */
static uint32_t meas_up_ack_rcv = 0; /* number of datagrams acknowledged for upstream traffic */
static pthread_mutex_t mx_meas_dw = PTHREAD_MUTEX_INITIALIZER; /* control access to the downstream measurements */
static uint32_t meas_dw_pull_sent = 0; /* number of PULL requests sent for downstream traffic */
static uint32_t meas_dw_ack_rcv = 0; /* number of PULL requests acknowledged for downstream traffic */
static uint32_t meas_dw_dgram_rcv = 0; /* count PULL response packets received for downstream traffic */
static uint32_t meas_dw_network_byte = 0; /* sum of UDP bytes sent for upstream traffic */
static uint32_t meas_dw_payload_byte = 0; /* sum of radio payload bytes sent for upstream traffic */
static uint32_t meas_nb_tx_ok = 0; /* count packets emitted successfully */
static uint32_t meas_nb_tx_fail = 0; /* count packets were TX failed for other reasons */
static uint32_t meas_nb_tx_requested = 0; /* count TX request from server (downlinks) */
static uint32_t meas_nb_tx_rejected_collision_packet = 0; /* count packets were TX request were rejected due to collision with another packet already programmed */
static uint32_t meas_nb_tx_rejected_collision_beacon = 0; /* count packets were TX request were rejected due to collision with a beacon already programmed */
static uint32_t meas_nb_tx_rejected_too_late = 0; /* count packets were TX request were rejected because it is too late to program it */
static uint32_t meas_nb_tx_rejected_too_early = 0; /* count packets were TX request were rejected because timestamp is too much in advance */
static uint32_t meas_nb_beacon_queued = 0; /* count beacon inserted in jit queue */
static uint32_t meas_nb_beacon_sent = 0; /* count beacon actually sent to concentrator */
static uint32_t meas_nb_beacon_rejected = 0; /* count beacon rejected for queuing */
static pthread_mutex_t mx_meas_gps = PTHREAD_MUTEX_INITIALIZER; /* control access to the GPS statistics */
static bool gps_coord_valid; /* could we get valid GPS coordinates ? */
static struct coord_s meas_gps_coord; /* GPS position of the gateway */
static struct coord_s meas_gps_err; /* GPS position of the gateway */
static pthread_mutex_t mx_stat_rep = PTHREAD_MUTEX_INITIALIZER; /* control access to the status report */
static bool report_ready = false; /* true when there is a new report to send to the server */
static char status_report[STATUS_SIZE]; /* status report as a JSON object */
/* beacon parameters */
static uint32_t beacon_period = 0; /* set beaconing period, must be a sub-multiple of 86400, the nb of sec in a day */
static uint32_t beacon_freq_hz = DEFAULT_BEACON_FREQ_HZ; /* set beacon TX frequency, in Hz */
static uint8_t beacon_freq_nb = DEFAULT_BEACON_FREQ_NB; /* set number of beaconing channels beacon */
static uint32_t beacon_freq_step = DEFAULT_BEACON_FREQ_STEP; /* set frequency step between beacon channels, in Hz */
static uint8_t beacon_datarate = DEFAULT_BEACON_DATARATE; /* set beacon datarate (SF) */
static uint32_t beacon_bw_hz = DEFAULT_BEACON_BW_HZ; /* set beacon bandwidth, in Hz */
static int8_t beacon_power = DEFAULT_BEACON_POWER; /* set beacon TX power, in dBm */
static uint8_t beacon_infodesc = DEFAULT_BEACON_INFODESC; /* set beacon information descriptor */
/* auto-quit function */
static uint32_t autoquit_threshold = 0; /* enable auto-quit after a number of non-acknowledged PULL_DATA (0 = disabled)*/
/* Just In Time TX scheduling */
static struct jit_queue_s jit_queue[LGW_RF_CHAIN_NB];
/* Gateway specificities */
static int8_t antenna_gain = 0;
/* TX capabilities */
static struct lgw_tx_gain_lut_s txlut[LGW_RF_CHAIN_NB]; /* TX gain table */
static uint32_t tx_freq_min[LGW_RF_CHAIN_NB]; /* lowest frequency supported by TX chain */
static uint32_t tx_freq_max[LGW_RF_CHAIN_NB]; /* highest frequency supported by TX chain */
static bool tx_enable[LGW_RF_CHAIN_NB] = {false}; /* Is TX enabled for a given RF chain ? */
static uint32_t nb_pkt_log[LGW_IF_CHAIN_NB][8]; /* [CH][SF] */
static uint32_t nb_pkt_received_lora = 0;
static uint32_t nb_pkt_received_fsk = 0;
static struct lgw_conf_debug_s debugconf;
static uint32_t nb_pkt_received_ref[16];
/* Interface type */
static lgw_com_type_t com_type = LGW_COM_SPI;
/* Spectral Scan */
static spectral_scan_t spectral_scan_params = {
.enable = false,
.freq_hz_start = 0,
.nb_chan = 0,
.nb_scan = 0,
.pace_s = 10
};
/* -------------------------------------------------------------------------- */
/* --- PRIVATE FUNCTIONS DECLARATION ---------------------------------------- */
static void usage(void);
static void sig_handler(int sigio);
static int parse_SX130x_configuration(const char * conf_file);
static int parse_gateway_configuration(const char * conf_file);
static int parse_debug_configuration(const char * conf_file);
static uint16_t crc16(const uint8_t * data, unsigned size);
static double difftimespec(struct timespec end, struct timespec beginning);
static void gps_process_sync(void);
static void gps_process_coords(void);
static int get_tx_gain_lut_index(uint8_t rf_chain, int8_t rf_power, uint8_t * lut_index);
/* threads */
void thread_up(void);
void thread_down(void);
void thread_jit(void);
void thread_gps(void);
void thread_valid(void);
void thread_spectral_scan(void);
/* -------------------------------------------------------------------------- */
/* --- PRIVATE FUNCTIONS DEFINITION ----------------------------------------- */
static void usage( void )
{
printf("~~~ Library version string~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
printf(" %s\n", lgw_version_info());
printf("~~~ Available options ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
printf(" -h print this help\n");
printf(" -c <filename> use config file other than 'global_conf.json'\n");
printf("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
}
static void sig_handler(int sigio) {
if (sigio == SIGQUIT) {
quit_sig = true;
} else if ((sigio == SIGINT) || (sigio == SIGTERM)) {
exit_sig = true;
}
return;
}
static int parse_SX130x_configuration(const char * conf_file) {
int i, j, number;
char param_name[32]; /* used to generate variable parameter names */
const char *str; /* used to store string value from JSON object */
const char conf_obj_name[] = "SX130x_conf";
JSON_Value *root_val = NULL;
JSON_Value *val = NULL;
JSON_Object *conf_obj = NULL;
JSON_Object *conf_txgain_obj;
JSON_Object *conf_ts_obj;
JSON_Object *conf_sx1261_obj = NULL;
JSON_Object *conf_scan_obj = NULL;
JSON_Object *conf_lbt_obj = NULL;
JSON_Object *conf_lbtchan_obj = NULL;
JSON_Array *conf_txlut_array = NULL;
JSON_Array *conf_lbtchan_array = NULL;
JSON_Array *conf_demod_array = NULL;
struct lgw_conf_board_s boardconf;
struct lgw_conf_rxrf_s rfconf;
struct lgw_conf_rxif_s ifconf;
struct lgw_conf_demod_s demodconf;
struct lgw_conf_ftime_s tsconf;
struct lgw_conf_sx1261_s sx1261conf;
uint32_t sf, bw, fdev;
bool sx1250_tx_lut;
size_t size;
/* try to parse JSON */
root_val = json_parse_file_with_comments(conf_file);
if (root_val == NULL) {
MSG("ERROR: %s is not a valid JSON file\n", conf_file);
exit(EXIT_FAILURE);
}
/* point to the gateway configuration object */
conf_obj = json_object_get_object(json_value_get_object(root_val), conf_obj_name);
if (conf_obj == NULL) {
MSG("INFO: %s does not contain a JSON object named %s\n", conf_file, conf_obj_name);
return -1;
} else {
MSG("INFO: %s does contain a JSON object named %s, parsing SX1302 parameters\n", conf_file, conf_obj_name);
}
/* set board configuration */
memset(&boardconf, 0, sizeof boardconf); /* initialize configuration structure */
str = json_object_get_string(conf_obj, "com_type");
if (str == NULL) {
MSG("ERROR: com_type must be configured in %s\n", conf_file);
return -1;
} else if (!strncmp(str, "SPI", 3) || !strncmp(str, "spi", 3)) {
boardconf.com_type = LGW_COM_SPI;
} else if (!strncmp(str, "USB", 3) || !strncmp(str, "usb", 3)) {
boardconf.com_type = LGW_COM_USB;
} else {
MSG("ERROR: invalid com type: %s (should be SPI or USB)\n", str);
return -1;
}
com_type = boardconf.com_type;
str = json_object_get_string(conf_obj, "com_path");
if (str != NULL) {
strncpy(boardconf.com_path, str, sizeof boardconf.com_path);
boardconf.com_path[sizeof boardconf.com_path - 1] = '\0'; /* ensure string termination */
} else {
MSG("ERROR: com_path must be configured in %s\n", conf_file);
return -1;
}
val = json_object_get_value(conf_obj, "lorawan_public"); /* fetch value (if possible) */
if (json_value_get_type(val) == JSONBoolean) {
boardconf.lorawan_public = (bool)json_value_get_boolean(val);
} else {
MSG("WARNING: Data type for lorawan_public seems wrong, please check\n");
boardconf.lorawan_public = false;
}
val = json_object_get_value(conf_obj, "clksrc"); /* fetch value (if possible) */
if (json_value_get_type(val) == JSONNumber) {
boardconf.clksrc = (uint8_t)json_value_get_number(val);
} else {
MSG("WARNING: Data type for clksrc seems wrong, please check\n");
boardconf.clksrc = 0;
}
val = json_object_get_value(conf_obj, "full_duplex"); /* fetch value (if possible) */
if (json_value_get_type(val) == JSONBoolean) {
boardconf.full_duplex = (bool)json_value_get_boolean(val);
} else {
MSG("WARNING: Data type for full_duplex seems wrong, please check\n");
boardconf.full_duplex = false;
}
MSG("INFO: com_type %s, com_path %s, lorawan_public %d, clksrc %d, full_duplex %d\n", (boardconf.com_type == LGW_COM_SPI) ? "SPI" : "USB", boardconf.com_path, boardconf.lorawan_public, boardconf.clksrc, boardconf.full_duplex);
/* all parameters parsed, submitting configuration to the HAL */
if (lgw_board_setconf(&boardconf) != LGW_HAL_SUCCESS) {
MSG("ERROR: Failed to configure board\n");
return -1;
}
/* set antenna gain configuration */
val = json_object_get_value(conf_obj, "antenna_gain"); /* fetch value (if possible) */
if (val != NULL) {
if (json_value_get_type(val) == JSONNumber) {
antenna_gain = (int8_t)json_value_get_number(val);
} else {
MSG("WARNING: Data type for antenna_gain seems wrong, please check\n");
antenna_gain = 0;
}
}
MSG("INFO: antenna_gain %d dBi\n", antenna_gain);
/* set timestamp configuration */
conf_ts_obj = json_object_get_object(conf_obj, "fine_timestamp");
if (conf_ts_obj == NULL) {
MSG("INFO: %s does not contain a JSON object for fine timestamp\n", conf_file);
} else {
val = json_object_get_value(conf_ts_obj, "enable"); /* fetch value (if possible) */
if (json_value_get_type(val) == JSONBoolean) {
tsconf.enable = (bool)json_value_get_boolean(val);
} else {
MSG("WARNING: Data type for fine_timestamp.enable seems wrong, please check\n");
tsconf.enable = false;
}
if (tsconf.enable == true) {
str = json_object_get_string(conf_ts_obj, "mode");
if (str == NULL) {
MSG("ERROR: fine_timestamp.mode must be configured in %s\n", conf_file);
return -1;
} else if (!strncmp(str, "high_capacity", 13) || !strncmp(str, "HIGH_CAPACITY", 13)) {
tsconf.mode = LGW_FTIME_MODE_HIGH_CAPACITY;
} else if (!strncmp(str, "all_sf", 6) || !strncmp(str, "ALL_SF", 6)) {
tsconf.mode = LGW_FTIME_MODE_ALL_SF;
} else {
MSG("ERROR: invalid fine timestamp mode: %s (should be high_capacity or all_sf)\n", str);
return -1;
}
MSG("INFO: Configuring precision timestamp with %s mode\n", str);
/* all parameters parsed, submitting configuration to the HAL */
if (lgw_ftime_setconf(&tsconf) != LGW_HAL_SUCCESS) {
MSG("ERROR: Failed to configure fine timestamp\n");
return -1;
}
} else {
MSG("INFO: Configuring legacy timestamp\n");
}
}
/* set SX1261 configuration */
memset(&sx1261conf, 0, sizeof sx1261conf); /* initialize configuration structure */
conf_sx1261_obj = json_object_get_object(conf_obj, "sx1261_conf"); /* fetch value (if possible) */
if (conf_sx1261_obj == NULL) {
MSG("INFO: no configuration for SX1261\n");
} else {
/* Global SX1261 configuration */
str = json_object_get_string(conf_sx1261_obj, "spi_path");
if (str != NULL) {
strncpy(sx1261conf.spi_path, str, sizeof sx1261conf.spi_path);
sx1261conf.spi_path[sizeof sx1261conf.spi_path - 1] = '\0'; /* ensure string termination */
} else {
MSG("INFO: SX1261 spi_path is not configured in %s\n", conf_file);
}
val = json_object_get_value(conf_sx1261_obj, "rssi_offset"); /* fetch value (if possible) */
if (json_value_get_type(val) == JSONNumber) {
sx1261conf.rssi_offset = (int8_t)json_value_get_number(val);
} else {
MSG("WARNING: Data type for sx1261_conf.rssi_offset seems wrong, please check\n");
sx1261conf.rssi_offset = 0;
}
/* Spectral Scan configuration */
conf_scan_obj = json_object_get_object(conf_sx1261_obj, "spectral_scan"); /* fetch value (if possible) */
if (conf_scan_obj == NULL) {
MSG("INFO: no configuration for Spectral Scan\n");
} else {
val = json_object_get_value(conf_scan_obj, "enable"); /* fetch value (if possible) */
if (json_value_get_type(val) == JSONBoolean) {
/* Enable background spectral scan thread in packet forwarder */
spectral_scan_params.enable = (bool)json_value_get_boolean(val);
} else {
MSG("WARNING: Data type for spectral_scan.enable seems wrong, please check\n");
}
if (spectral_scan_params.enable == true) {
/* Enable the sx1261 radio hardware configuration to allow spectral scan */
sx1261conf.enable = true;
MSG("INFO: Spectral Scan with SX1261 is enabled\n");
/* Get Spectral Scan Parameters */
val = json_object_get_value(conf_scan_obj, "freq_start"); /* fetch value (if possible) */
if (json_value_get_type(val) == JSONNumber) {
spectral_scan_params.freq_hz_start = (uint32_t)json_value_get_number(val);
} else {
MSG("WARNING: Data type for spectral_scan.freq_start seems wrong, please check\n");
}
val = json_object_get_value(conf_scan_obj, "nb_chan"); /* fetch value (if possible) */
if (json_value_get_type(val) == JSONNumber) {
spectral_scan_params.nb_chan = (uint8_t)json_value_get_number(val);
} else {
MSG("WARNING: Data type for spectral_scan.nb_chan seems wrong, please check\n");
}
val = json_object_get_value(conf_scan_obj, "nb_scan"); /* fetch value (if possible) */
if (json_value_get_type(val) == JSONNumber) {
spectral_scan_params.nb_scan = (uint16_t)json_value_get_number(val);
} else {
MSG("WARNING: Data type for spectral_scan.nb_scan seems wrong, please check\n");
}
val = json_object_get_value(conf_scan_obj, "pace_s"); /* fetch value (if possible) */
if (json_value_get_type(val) == JSONNumber) {
spectral_scan_params.pace_s = (uint32_t)json_value_get_number(val);
} else {
MSG("WARNING: Data type for spectral_scan.pace_s seems wrong, please check\n");
}
}
}
/* LBT configuration */
conf_lbt_obj = json_object_get_object(conf_sx1261_obj, "lbt"); /* fetch value (if possible) */
if (conf_lbt_obj == NULL) {
MSG("INFO: no configuration for LBT\n");
} else {
val = json_object_get_value(conf_lbt_obj, "enable"); /* fetch value (if possible) */
if (json_value_get_type(val) == JSONBoolean) {
sx1261conf.lbt_conf.enable = (bool)json_value_get_boolean(val);
} else {
MSG("WARNING: Data type for lbt.enable seems wrong, please check\n");
}
if (sx1261conf.lbt_conf.enable == true) {
/* Enable the sx1261 radio hardware configuration to allow spectral scan */
sx1261conf.enable = true;
MSG("INFO: Listen-Before-Talk with SX1261 is enabled\n");
val = json_object_get_value(conf_lbt_obj, "rssi_target"); /* fetch value (if possible) */
if (json_value_get_type(val) == JSONNumber) {
sx1261conf.lbt_conf.rssi_target = (int8_t)json_value_get_number(val);
} else {
MSG("WARNING: Data type for lbt.rssi_target seems wrong, please check\n");
sx1261conf.lbt_conf.rssi_target = 0;
}
/* set LBT channels configuration */
conf_lbtchan_array = json_object_get_array(conf_lbt_obj, "channels");
if (conf_lbtchan_array != NULL) {
sx1261conf.lbt_conf.nb_channel = json_array_get_count(conf_lbtchan_array);
MSG("INFO: %u LBT channels configured\n", sx1261conf.lbt_conf.nb_channel);
}
for (i = 0; i < (int)sx1261conf.lbt_conf.nb_channel; i++) {
/* Sanity check */
if (i >= LGW_LBT_CHANNEL_NB_MAX) {
MSG("ERROR: LBT channel %d not supported, skip it\n", i);
break;
}
/* Get LBT channel configuration object from array */
conf_lbtchan_obj = json_array_get_object(conf_lbtchan_array, i);
/* Channel frequency */
val = json_object_dotget_value(conf_lbtchan_obj, "freq_hz"); /* fetch value (if possible) */
if (val != NULL) {
if (json_value_get_type(val) == JSONNumber) {
sx1261conf.lbt_conf.channels[i].freq_hz = (uint32_t)json_value_get_number(val);
} else {
MSG("WARNING: Data type for lbt.channels[%d].freq_hz seems wrong, please check\n", i);
sx1261conf.lbt_conf.channels[i].freq_hz = 0;
}
} else {
MSG("ERROR: no frequency defined for LBT channel %d\n", i);
return -1;
}
/* Channel bandiwdth */
val = json_object_dotget_value(conf_lbtchan_obj, "bandwidth"); /* fetch value (if possible) */
if (val != NULL) {
if (json_value_get_type(val) == JSONNumber) {
bw = (uint32_t)json_value_get_number(val);
switch(bw) {
case 500000: sx1261conf.lbt_conf.channels[i].bandwidth = BW_500KHZ; break;
case 250000: sx1261conf.lbt_conf.channels[i].bandwidth = BW_250KHZ; break;
case 125000: sx1261conf.lbt_conf.channels[i].bandwidth = BW_125KHZ; break;
default: sx1261conf.lbt_conf.channels[i].bandwidth = BW_UNDEFINED;
}
} else {
MSG("WARNING: Data type for lbt.channels[%d].freq_hz seems wrong, please check\n", i);
sx1261conf.lbt_conf.channels[i].bandwidth = BW_UNDEFINED;
}
} else {
MSG("ERROR: no bandiwdth defined for LBT channel %d\n", i);
return -1;
}
/* Channel scan time */
val = json_object_dotget_value(conf_lbtchan_obj, "scan_time_us"); /* fetch value (if possible) */
if (val != NULL) {
if (json_value_get_type(val) == JSONNumber) {
if ((uint16_t)json_value_get_number(val) == 128) {
sx1261conf.lbt_conf.channels[i].scan_time_us = LGW_LBT_SCAN_TIME_128_US;
} else if ((uint16_t)json_value_get_number(val) == 5000) {
sx1261conf.lbt_conf.channels[i].scan_time_us = LGW_LBT_SCAN_TIME_5000_US;
} else {
MSG("ERROR: scan time not supported for LBT channel %d, must be 128 or 5000\n", i);
return -1;
}
} else {
MSG("WARNING: Data type for lbt.channels[%d].scan_time_us seems wrong, please check\n", i);
sx1261conf.lbt_conf.channels[i].scan_time_us = 0;
}
} else {
MSG("ERROR: no scan_time_us defined for LBT channel %d\n", i);
return -1;
}
/* Channel transmit time */
val = json_object_dotget_value(conf_lbtchan_obj, "transmit_time_ms"); /* fetch value (if possible) */
if (val != NULL) {
if (json_value_get_type(val) == JSONNumber) {
sx1261conf.lbt_conf.channels[i].transmit_time_ms = (uint16_t)json_value_get_number(val);
} else {
MSG("WARNING: Data type for lbt.channels[%d].transmit_time_ms seems wrong, please check\n", i);
sx1261conf.lbt_conf.channels[i].transmit_time_ms = 0;
}
} else {
MSG("ERROR: no transmit_time_ms defined for LBT channel %d\n", i);
return -1;
}
}
}
}
/* all parameters parsed, submitting configuration to the HAL */
if (lgw_sx1261_setconf(&sx1261conf) != LGW_HAL_SUCCESS) {
MSG("ERROR: Failed to configure the SX1261 radio\n");
return -1;
}
}
/* set configuration for RF chains */
for (i = 0; i < LGW_RF_CHAIN_NB; ++i) {
memset(&rfconf, 0, sizeof rfconf); /* initialize configuration structure */
snprintf(param_name, sizeof param_name, "radio_%i", i); /* compose parameter path inside JSON structure */
val = json_object_get_value(conf_obj, param_name); /* fetch value (if possible) */
if (json_value_get_type(val) != JSONObject) {
MSG("INFO: no configuration for radio %i\n", i);
continue;
}
/* there is an object to configure that radio, let's parse it */
snprintf(param_name, sizeof param_name, "radio_%i.enable", i);
val = json_object_dotget_value(conf_obj, param_name);
if (json_value_get_type(val) == JSONBoolean) {
rfconf.enable = (bool)json_value_get_boolean(val);
} else {
rfconf.enable = false;
}
if (rfconf.enable == false) { /* radio disabled, nothing else to parse */
MSG("INFO: radio %i disabled\n", i);
} else { /* radio enabled, will parse the other parameters */
snprintf(param_name, sizeof param_name, "radio_%i.freq", i);
rfconf.freq_hz = (uint32_t)json_object_dotget_number(conf_obj, param_name);
snprintf(param_name, sizeof param_name, "radio_%i.rssi_offset", i);
rfconf.rssi_offset = (float)json_object_dotget_number(conf_obj, param_name);
snprintf(param_name, sizeof param_name, "radio_%i.rssi_tcomp.coeff_a", i);
rfconf.rssi_tcomp.coeff_a = (float)json_object_dotget_number(conf_obj, param_name);
snprintf(param_name, sizeof param_name, "radio_%i.rssi_tcomp.coeff_b", i);
rfconf.rssi_tcomp.coeff_b = (float)json_object_dotget_number(conf_obj, param_name);
snprintf(param_name, sizeof param_name, "radio_%i.rssi_tcomp.coeff_c", i);
rfconf.rssi_tcomp.coeff_c = (float)json_object_dotget_number(conf_obj, param_name);
snprintf(param_name, sizeof param_name, "radio_%i.rssi_tcomp.coeff_d", i);
rfconf.rssi_tcomp.coeff_d = (float)json_object_dotget_number(conf_obj, param_name);
snprintf(param_name, sizeof param_name, "radio_%i.rssi_tcomp.coeff_e", i);
rfconf.rssi_tcomp.coeff_e = (float)json_object_dotget_number(conf_obj, param_name);
snprintf(param_name, sizeof param_name, "radio_%i.type", i);
str = json_object_dotget_string(conf_obj, param_name);
if (!strncmp(str, "SX1255", 6)) {
rfconf.type = LGW_RADIO_TYPE_SX1255;
} else if (!strncmp(str, "SX1257", 6)) {
rfconf.type = LGW_RADIO_TYPE_SX1257;
} else if (!strncmp(str, "SX1250", 6)) {
rfconf.type = LGW_RADIO_TYPE_SX1250;
} else {
MSG("WARNING: invalid radio type: %s (should be SX1255 or SX1257 or SX1250)\n", str);
}
snprintf(param_name, sizeof param_name, "radio_%i.single_input_mode", i);
val = json_object_dotget_value(conf_obj, param_name);
if (json_value_get_type(val) == JSONBoolean) {
rfconf.single_input_mode = (bool)json_value_get_boolean(val);
} else {
rfconf.single_input_mode = false;
}
snprintf(param_name, sizeof param_name, "radio_%i.tx_enable", i);
val = json_object_dotget_value(conf_obj, param_name);
if (json_value_get_type(val) == JSONBoolean) {
rfconf.tx_enable = (bool)json_value_get_boolean(val);
tx_enable[i] = rfconf.tx_enable; /* update global context for later check */
if (rfconf.tx_enable == true) {
/* tx is enabled on this rf chain, we need its frequency range */
snprintf(param_name, sizeof param_name, "radio_%i.tx_freq_min", i);
tx_freq_min[i] = (uint32_t)json_object_dotget_number(conf_obj, param_name);
snprintf(param_name, sizeof param_name, "radio_%i.tx_freq_max", i);
tx_freq_max[i] = (uint32_t)json_object_dotget_number(conf_obj, param_name);
if ((tx_freq_min[i] == 0) || (tx_freq_max[i] == 0)) {
MSG("WARNING: no frequency range specified for TX rf chain %d\n", i);
}
/* set configuration for tx gains */
memset(&txlut[i], 0, sizeof txlut[i]); /* initialize configuration structure */
snprintf(param_name, sizeof param_name, "radio_%i.tx_gain_lut", i);
conf_txlut_array = json_object_dotget_array(conf_obj, param_name);
if (conf_txlut_array != NULL) {
txlut[i].size = json_array_get_count(conf_txlut_array);
/* Detect if we have a sx125x or sx1250 configuration */
conf_txgain_obj = json_array_get_object(conf_txlut_array, 0);
val = json_object_dotget_value(conf_txgain_obj, "pwr_idx");
if (val != NULL) {
printf("INFO: Configuring Tx Gain LUT for rf_chain %u with %u indexes for sx1250\n", i, txlut[i].size);
sx1250_tx_lut = true;
} else {
printf("INFO: Configuring Tx Gain LUT for rf_chain %u with %u indexes for sx125x\n", i, txlut[i].size);
sx1250_tx_lut = false;
}
/* Parse the table */
for (j = 0; j < (int)txlut[i].size; j++) {
/* Sanity check */
if (j >= TX_GAIN_LUT_SIZE_MAX) {
printf("ERROR: TX Gain LUT [%u] index %d not supported, skip it\n", i, j);
break;
}
/* Get TX gain object from LUT */
conf_txgain_obj = json_array_get_object(conf_txlut_array, j);
/* rf power */
val = json_object_dotget_value(conf_txgain_obj, "rf_power");
if (json_value_get_type(val) == JSONNumber) {
txlut[i].lut[j].rf_power = (int8_t)json_value_get_number(val);
} else {
printf("WARNING: Data type for %s[%d] seems wrong, please check\n", "rf_power", j);
txlut[i].lut[j].rf_power = 0;
}
/* PA gain */
val = json_object_dotget_value(conf_txgain_obj, "pa_gain");
if (json_value_get_type(val) == JSONNumber) {
txlut[i].lut[j].pa_gain = (uint8_t)json_value_get_number(val);
} else {
printf("WARNING: Data type for %s[%d] seems wrong, please check\n", "pa_gain", j);
txlut[i].lut[j].pa_gain = 0;
}
if (sx1250_tx_lut == false) {
/* DIG gain */
val = json_object_dotget_value(conf_txgain_obj, "dig_gain");
if (json_value_get_type(val) == JSONNumber) {
txlut[i].lut[j].dig_gain = (uint8_t)json_value_get_number(val);
} else {
printf("WARNING: Data type for %s[%d] seems wrong, please check\n", "dig_gain", j);
txlut[i].lut[j].dig_gain = 0;
}
/* DAC gain */
val = json_object_dotget_value(conf_txgain_obj, "dac_gain");
if (json_value_get_type(val) == JSONNumber) {
txlut[i].lut[j].dac_gain = (uint8_t)json_value_get_number(val);
} else {
printf("WARNING: Data type for %s[%d] seems wrong, please check\n", "dac_gain", j);
txlut[i].lut[j].dac_gain = 3; /* This is the only dac_gain supported for now */
}
/* MIX gain */
val = json_object_dotget_value(conf_txgain_obj, "mix_gain");
if (json_value_get_type(val) == JSONNumber) {
txlut[i].lut[j].mix_gain = (uint8_t)json_value_get_number(val);
} else {
printf("WARNING: Data type for %s[%d] seems wrong, please check\n", "mix_gain", j);
txlut[i].lut[j].mix_gain = 0;
}
} else {
/* TODO: rework this, should not be needed for sx1250 */
txlut[i].lut[j].mix_gain = 5;
/* power index */
val = json_object_dotget_value(conf_txgain_obj, "pwr_idx");
if (json_value_get_type(val) == JSONNumber) {
txlut[i].lut[j].pwr_idx = (uint8_t)json_value_get_number(val);
} else {
printf("WARNING: Data type for %s[%d] seems wrong, please check\n", "pwr_idx", j);
txlut[i].lut[j].pwr_idx = 0;
}
}
}
/* all parameters parsed, submitting configuration to the HAL */
if (txlut[i].size > 0) {
if (lgw_txgain_setconf(i, &txlut[i]) != LGW_HAL_SUCCESS) {
MSG("ERROR: Failed to configure concentrator TX Gain LUT for rf_chain %u\n", i);
return -1;
}
} else {
MSG("WARNING: No TX gain LUT defined for rf_chain %u\n", i);
}
} else {
MSG("WARNING: No TX gain LUT defined for rf_chain %u\n", i);
}
}
} else {
rfconf.tx_enable = false;
}
MSG("INFO: radio %i enabled (type %s), center frequency %u, RSSI offset %f, tx enabled %d, single input mode %d\n", i, str, rfconf.freq_hz, rfconf.rssi_offset, rfconf.tx_enable, rfconf.single_input_mode);
}
/* all parameters parsed, submitting configuration to the HAL */
if (lgw_rxrf_setconf(i, &rfconf) != LGW_HAL_SUCCESS) {
MSG("ERROR: invalid configuration for radio %i\n", i);
return -1;
}
}
/* set configuration for demodulators */
memset(&demodconf, 0, sizeof demodconf); /* initialize configuration structure */
val = json_object_get_value(conf_obj, "chan_multiSF_All"); /* fetch value (if possible) */
if (json_value_get_type(val) != JSONObject) {
MSG("INFO: no configuration for LoRa multi-SF spreading factors enabling\n");
} else {
conf_demod_array = json_object_dotget_array(conf_obj, "chan_multiSF_All.spreading_factor_enable");
if ((conf_demod_array != NULL) && ((size = json_array_get_count(conf_demod_array)) <= LGW_MULTI_NB)) {
for (i = 0; i < (int)size; i++) {
number = json_array_get_number(conf_demod_array, i);
if (number < 5 || number > 12) {
MSG("WARNING: failed to parse chan_multiSF_All.spreading_factor_enable (wrong value at idx %d)\n", i);
demodconf.multisf_datarate = 0xFF; /* enable all SFs */
break;
} else {
/* set corresponding bit in the bitmask SF5 is LSB -> SF12 is MSB */
demodconf.multisf_datarate |= (1 << (number - 5));
}
}
} else {
MSG("WARNING: failed to parse chan_multiSF_All.spreading_factor_enable\n");
demodconf.multisf_datarate = 0xFF; /* enable all SFs */
}
/* all parameters parsed, submitting configuration to the HAL */
if (lgw_demod_setconf(&demodconf) != LGW_HAL_SUCCESS) {
MSG("ERROR: invalid configuration for demodulation parameters\n");
return -1;
}
}
/* set configuration for Lora multi-SF channels (bandwidth cannot be set) */
for (i = 0; i < LGW_MULTI_NB; ++i) {
memset(&ifconf, 0, sizeof ifconf); /* initialize configuration structure */
snprintf(param_name, sizeof param_name, "chan_multiSF_%i", i); /* compose parameter path inside JSON structure */
val = json_object_get_value(conf_obj, param_name); /* fetch value (if possible) */
if (json_value_get_type(val) != JSONObject) {
MSG("INFO: no configuration for Lora multi-SF channel %i\n", i);
continue;
}
/* there is an object to configure that Lora multi-SF channel, let's parse it */
snprintf(param_name, sizeof param_name, "chan_multiSF_%i.enable", i);
val = json_object_dotget_value(conf_obj, param_name);
if (json_value_get_type(val) == JSONBoolean) {
ifconf.enable = (bool)json_value_get_boolean(val);
} else {
ifconf.enable = false;
}
if (ifconf.enable == false) { /* Lora multi-SF channel disabled, nothing else to parse */
MSG("INFO: Lora multi-SF channel %i disabled\n", i);
} else { /* Lora multi-SF channel enabled, will parse the other parameters */
snprintf(param_name, sizeof param_name, "chan_multiSF_%i.radio", i);
ifconf.rf_chain = (uint32_t)json_object_dotget_number(conf_obj, param_name);
snprintf(param_name, sizeof param_name, "chan_multiSF_%i.if", i);
ifconf.freq_hz = (int32_t)json_object_dotget_number(conf_obj, param_name);
// TODO: handle individual SF enabling and disabling (spread_factor)
MSG("INFO: Lora multi-SF channel %i> radio %i, IF %i Hz, 125 kHz bw, SF 5 to 12\n", i, ifconf.rf_chain, ifconf.freq_hz);
}
/* all parameters parsed, submitting configuration to the HAL */
if (lgw_rxif_setconf(i, &ifconf) != LGW_HAL_SUCCESS) {
MSG("ERROR: invalid configuration for Lora multi-SF channel %i\n", i);
return -1;
}
}
/* set configuration for Lora standard channel */
memset(&ifconf, 0, sizeof ifconf); /* initialize configuration structure */
val = json_object_get_value(conf_obj, "chan_Lora_std"); /* fetch value (if possible) */
if (json_value_get_type(val) != JSONObject) {
MSG("INFO: no configuration for Lora standard channel\n");
} else {
val = json_object_dotget_value(conf_obj, "chan_Lora_std.enable");
if (json_value_get_type(val) == JSONBoolean) {
ifconf.enable = (bool)json_value_get_boolean(val);
} else {
ifconf.enable = false;
}
if (ifconf.enable == false) {
MSG("INFO: Lora standard channel %i disabled\n", i);
} else {
ifconf.rf_chain = (uint32_t)json_object_dotget_number(conf_obj, "chan_Lora_std.radio");
ifconf.freq_hz = (int32_t)json_object_dotget_number(conf_obj, "chan_Lora_std.if");
bw = (uint32_t)json_object_dotget_number(conf_obj, "chan_Lora_std.bandwidth");
switch(bw) {
case 500000: ifconf.bandwidth = BW_500KHZ; break;
case 250000: ifconf.bandwidth = BW_250KHZ; break;
case 125000: ifconf.bandwidth = BW_125KHZ; break;
default: ifconf.bandwidth = BW_UNDEFINED;
}
sf = (uint32_t)json_object_dotget_number(conf_obj, "chan_Lora_std.spread_factor");
switch(sf) {
case 5: ifconf.datarate = DR_LORA_SF5; break;
case 6: ifconf.datarate = DR_LORA_SF6; break;
case 7: ifconf.datarate = DR_LORA_SF7; break;
case 8: ifconf.datarate = DR_LORA_SF8; break;
case 9: ifconf.datarate = DR_LORA_SF9; break;
case 10: ifconf.datarate = DR_LORA_SF10; break;
case 11: ifconf.datarate = DR_LORA_SF11; break;
case 12: ifconf.datarate = DR_LORA_SF12; break;
default: ifconf.datarate = DR_UNDEFINED;
}
val = json_object_dotget_value(conf_obj, "chan_Lora_std.implicit_hdr");
if (json_value_get_type(val) == JSONBoolean) {
ifconf.implicit_hdr = (bool)json_value_get_boolean(val);
} else {
ifconf.implicit_hdr = false;
}
if (ifconf.implicit_hdr == true) {
val = json_object_dotget_value(conf_obj, "chan_Lora_std.implicit_payload_length");
if (json_value_get_type(val) == JSONNumber) {
ifconf.implicit_payload_length = (uint8_t)json_value_get_number(val);
} else {
MSG("ERROR: payload length setting is mandatory for implicit header mode\n");
return -1;
}
val = json_object_dotget_value(conf_obj, "chan_Lora_std.implicit_crc_en");
if (json_value_get_type(val) == JSONBoolean) {
ifconf.implicit_crc_en = (bool)json_value_get_boolean(val);
} else {
MSG("ERROR: CRC enable setting is mandatory for implicit header mode\n");
return -1;
}
val = json_object_dotget_value(conf_obj, "chan_Lora_std.implicit_coderate");
if (json_value_get_type(val) == JSONNumber) {
ifconf.implicit_coderate = (uint8_t)json_value_get_number(val);
} else {
MSG("ERROR: coding rate setting is mandatory for implicit header mode\n");
return -1;
}
}
MSG("INFO: Lora std channel> radio %i, IF %i Hz, %u Hz bw, SF %u, %s\n", ifconf.rf_chain, ifconf.freq_hz, bw, sf, (ifconf.implicit_hdr == true) ? "Implicit header" : "Explicit header");
}
if (lgw_rxif_setconf(8, &ifconf) != LGW_HAL_SUCCESS) {
MSG("ERROR: invalid configuration for Lora standard channel\n");
return -1;
}
}
/* set configuration for FSK channel */
memset(&ifconf, 0, sizeof ifconf); /* initialize configuration structure */
val = json_object_get_value(conf_obj, "chan_FSK"); /* fetch value (if possible) */
if (json_value_get_type(val) != JSONObject) {
MSG("INFO: no configuration for FSK channel\n");
} else {
val = json_object_dotget_value(conf_obj, "chan_FSK.enable");
if (json_value_get_type(val) == JSONBoolean) {
ifconf.enable = (bool)json_value_get_boolean(val);
} else {
ifconf.enable = false;
}
if (ifconf.enable == false) {
MSG("INFO: FSK channel %i disabled\n", i);
} else {
ifconf.rf_chain = (uint32_t)json_object_dotget_number(conf_obj, "chan_FSK.radio");
ifconf.freq_hz = (int32_t)json_object_dotget_number(conf_obj, "chan_FSK.if");
bw = (uint32_t)json_object_dotget_number(conf_obj, "chan_FSK.bandwidth");
fdev = (uint32_t)json_object_dotget_number(conf_obj, "chan_FSK.freq_deviation");
ifconf.datarate = (uint32_t)json_object_dotget_number(conf_obj, "chan_FSK.datarate");
/* if chan_FSK.bandwidth is set, it has priority over chan_FSK.freq_deviation */
if ((bw == 0) && (fdev != 0)) {
bw = 2 * fdev + ifconf.datarate;
}
if (bw == 0) ifconf.bandwidth = BW_UNDEFINED;
#if 0 /* TODO */
else if (bw <= 7800) ifconf.bandwidth = BW_7K8HZ;
else if (bw <= 15600) ifconf.bandwidth = BW_15K6HZ;
else if (bw <= 31200) ifconf.bandwidth = BW_31K2HZ;
else if (bw <= 62500) ifconf.bandwidth = BW_62K5HZ;
#endif
else if (bw <= 125000) ifconf.bandwidth = BW_125KHZ;
else if (bw <= 250000) ifconf.bandwidth = BW_250KHZ;
else if (bw <= 500000) ifconf.bandwidth = BW_500KHZ;