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/*
/ _____) _ | |
( (____ _____ ____ _| |_ _____ ____| |__
\____ \| ___ | (_ _) ___ |/ ___) _ \
_____) ) ____| | | || |_| ____( (___| | | |
(______/|_____)_|_|_| \__)_____)\____)_| |_|
©2013 Semtech-Cycleo
Description:
Send a bunch of packets on a settable frequency
License: Revised BSD License, see LICENSE.TXT file include in the project
Maintainer: Sylvain Miermont
*/
/* -------------------------------------------------------------------------- */
/* --- 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 sprintf fopen fputs */
#include <string.h> /* memset */
#include <signal.h> /* sigaction */
#include <unistd.h> /* getopt access */
#include <stdlib.h> /* exit codes */
#include "loragw_hal.h"
#include "loragw_aux.h"
/* -------------------------------------------------------------------------- */
/* --- PRIVATE MACROS ------------------------------------------------------- */
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
#define MSG(args...) fprintf(stderr, args) /* message that is destined to the user */
/* -------------------------------------------------------------------------- */
/* --- PRIVATE CONSTANTS ---------------------------------------------------- */
#define RF_CHAIN 0 /* we'll use radio A only */
const uint32_t lowfreq[LGW_RF_CHAIN_NB] = LGW_RF_TX_LOWFREQ;
const uint32_t upfreq[LGW_RF_CHAIN_NB] = LGW_RF_TX_UPFREQ;
/* -------------------------------------------------------------------------- */
/* --- PRIVATE VARIABLES (GLOBAL) ------------------------------------------- */
/* signal handling variables */
struct sigaction sigact; /* SIGQUIT&SIGINT&SIGTERM signal handling */
static int exit_sig = 0; /* 1 -> application terminates cleanly (shut down hardware, close open files, etc) */
static int quit_sig = 0; /* 1 -> application terminates without shutting down the hardware */
/* -------------------------------------------------------------------------- */
/* --- PRIVATE FUNCTIONS DECLARATION ---------------------------------------- */
static void sig_handler(int sigio);
void usage (void);
/* -------------------------------------------------------------------------- */
/* --- PRIVATE FUNCTIONS DEFINITION ----------------------------------------- */
static void sig_handler(int sigio) {
if (sigio == SIGQUIT) {
quit_sig = 1;;
} else if ((sigio == SIGINT) || (sigio == SIGTERM)) {
exit_sig = 1;
}
}
/* describe command line options */
void usage(void) {
MSG( "Available options:\n");
MSG( " -h print this help\n");
MSG( " -f <float> target frequency in MHz\n");
MSG( " -s <int> Spreading Factor\n");
MSG( " -b <int> Modulation bandwidth in kHz\n");
MSG( " -p <int> RF power (dBm)\n");
MSG( " -t <int> pause between packets (ms)\n");
MSG( " -x <int> numbers of times the sequence is repeated\n");
MSG( " -i send packet using inverted modulation polarity \n");
}
/* -------------------------------------------------------------------------- */
/* --- MAIN FUNCTION -------------------------------------------------------- */
int main(int argc, char **argv)
{
int i;
uint8_t status_var;
/* user entry parameters */
int xi = 0;
double xd = 0.0;
uint32_t f_min;
uint32_t f_max;
/* application parameters */
uint32_t f_target = lowfreq[RF_CHAIN]/2 + upfreq[RF_CHAIN]/2; /* target frequency */
int sf = 10; /* SF10 by default */
int bw = 125; /* 125kHz bandwidth by default */
int pow = 14; /* 14 dBm by default */
int delay = 1000; /* 1 second between packets by default */
int repeat = 1; /* sweep only once by default */
bool invert = false;
/* RF configuration (TX fail if RF chain is not enabled) */
const struct lgw_conf_rxrf_s rfconf = {true, lowfreq[RF_CHAIN]};
/* allocate memory for packet sending */
struct lgw_pkt_tx_s txpkt; /* array containing 1 outbound packet + metadata */
/* loop variables (also use as counters in the packet payload) */
uint16_t cycle_count = 0;
/* parse command line options */
while ((i = getopt (argc, argv, "hf:s:b:p:t:x:i")) != -1) {
switch (i) {
case 'h':
usage();
return EXIT_FAILURE;
break;
case 'f': /* -f <float> target frequency in MHz */
i = sscanf(optarg, "%lf", &xd);
if ((i != 1) || (xd < 30.0) || (xd > 3000.0)) {
MSG("ERROR: invalid TX frequency\n");
return EXIT_FAILURE;
} else {
f_target = (uint32_t)((xd*1e6) + 0.5); /* .5 Hz offset to get rounding instead of truncating */
}
break;
case 's': /* -s <int> Spreading Factor */
i = sscanf(optarg, "%i", &xi);
if ((i != 1) || (xi < 7) || (xi > 12)) {
MSG("ERROR: invalid spreading factor\n");
return EXIT_FAILURE;
} else {
sf = xi;
}
break;
case 'b': /* -b <int> Modulation bandwidth in kHz */
i = sscanf(optarg, "%i", &xi);
if ((i != 1) || ((xi != 125)&&(xi != 250)&&(xi != 500))) {
MSG("ERROR: invalid Lora bandwidth\n");
return EXIT_FAILURE;
} else {
bw = xi;
}
break;
case 'p': /* -p <int> RF power */
i = sscanf(optarg, "%i", &xi);
if ((i != 1) || (xi < 0) || (xi > 30)) {
MSG("ERROR: invalid RF power\n");
return EXIT_FAILURE;
} else {
pow = xi;
}
break;
case 't': /* -t <int> pause between packets (ms) */
i = sscanf(optarg, "%i", &xi);
if ((i != 1) || (xi < 0)) {
MSG("ERROR: invalid time between packets\n");
return EXIT_FAILURE;
} else {
delay = xi;
}
break;
case 'x': /* -x <int> numbers of times the sequence is repeated */
i = sscanf(optarg, "%i", &xi);
if ((i != 1) || (xi < 1)) {
MSG("ERROR: invalid number of repeats\n");
return EXIT_FAILURE;
} else {
repeat = xi;
}
break;
case 'i': /* -i send packet using inverted modulation polarity */
invert = true;
break;
default:
MSG("ERROR: argument parsing use -h option for help\n");
usage();
return EXIT_FAILURE;
}
}
/* check parameter sanity */
f_min = lowfreq[RF_CHAIN] + (500 * bw);
f_max = upfreq[RF_CHAIN] - (500 * bw);
if ((f_target < f_min) || (f_target > f_max)) {
MSG("ERROR: frequency out of authorized band (accounting for modulation bandwidth)\n");
return EXIT_FAILURE;
}
printf("Sending %u packets on %u Hz (BW %u kHz, SF %u, 20 bytes payload) at %i dBm, with %u ms between each\n", repeat, f_target, bw, sf, pow, delay);
/* configure signal handling */
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigact.sa_handler = sig_handler;
sigaction(SIGQUIT, &sigact, NULL);
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
/* starting the concentrator */
lgw_rxrf_setconf(RF_CHAIN, rfconf);
i = lgw_start();
if (i == LGW_HAL_SUCCESS) {
MSG("INFO: concentrator started, packet can be sent\n");
} else {
MSG("ERROR: failed to start the concentrator\n");
return EXIT_FAILURE;
}
/* fill-up payload and parameters */
memset(&txpkt, 0, sizeof(txpkt));
txpkt.freq_hz = f_target;
txpkt.tx_mode = IMMEDIATE;
txpkt.rf_chain = RF_CHAIN;
txpkt.rf_power = pow;
txpkt.modulation = MOD_LORA;
switch (bw) {
case 125: txpkt.bandwidth = BW_125KHZ; break;
case 250: txpkt.bandwidth = BW_250KHZ; break;
case 500: txpkt.bandwidth = BW_500KHZ; break;
default:
MSG("ERROR: invalid 'bw' variable\n");
return EXIT_FAILURE;
}
switch (sf) {
case 7: txpkt.datarate = DR_LORA_SF7; break;
case 8: txpkt.datarate = DR_LORA_SF8; break;
case 9: txpkt.datarate = DR_LORA_SF9; break;
case 10: txpkt.datarate = DR_LORA_SF10; break;
case 11: txpkt.datarate = DR_LORA_SF11; break;
case 12: txpkt.datarate = DR_LORA_SF12; break;
default:
MSG("ERROR: invalid 'sf' variable\n");
return EXIT_FAILURE;
}
txpkt.coderate = CR_LORA_4_5;
txpkt.invert_pol = invert;
txpkt.preamble = 8;
txpkt.size = 20; /* should be close to typical payload length */
strcpy((char *)txpkt.payload, "TEST**abcdefghijklmn" ); /* abc.. is for padding */
/* main loop */
for (cycle_count = 0; cycle_count < repeat; ++cycle_count) {
/* refresh counters in payload (big endian, for readability) */
txpkt.payload[4] = (uint8_t)(cycle_count >> 8); /* MSB */
txpkt.payload[5] = (uint8_t)(cycle_count & 0x00FF); /* LSB */
/* send packet */
printf("Sending packet number %u ...", cycle_count);
i = lgw_send(txpkt); /* non-blocking scheduling of TX packet */
do {
wait_ms(5);
lgw_status(TX_STATUS, &status_var); /* get TX status */
} while (status_var != TX_FREE);
printf("OK\n");
/* wait inter-packet delay */
wait_ms(delay);
/* exit loop on user signals */
if ((quit_sig == 1) || (exit_sig == 1)) {
break;
}
}
/* clean up before leaving */
lgw_stop();
printf("Exiting Lora concentrator TX test program\n");
return EXIT_SUCCESS;
}
/* --- EOF ------------------------------------------------------------------ */
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