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F5OEO-WsprryPi/wspr.cpp

973 wiersze
28 KiB
C++
Czysty Bezpośredni odnośnik Wina Historia

// WSPR transmitter for the Raspberry Pi. See accompanying README
// file for a description on how to use this code.
// License:
// 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/>.
// ha7ilm: added RPi2 support based on a patch to PiFmRds by Cristophe
// Jacquet and Richard Hirst: http://git.io/vn7O9
// F5OEO : adapt to librpitx for cleaner spectrum
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <dirent.h>
#include <math.h>
#include <cmath>
#include <cstdint>
#include <fcntl.h>
#include <assert.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <signal.h>
#include <malloc.h>
#include <time.h>
#include <sys/time.h>
#include <getopt.h>
#include <vector>
#include <iostream>
#include <sstream>
#include <iomanip>
#include <algorithm>
#include <pthread.h>
#include <sys/timex.h>
#include "librpitx/src/librpitx.h"
clkgpio *clk = NULL;
ngfmdmasync *ngfmtest = NULL;
#define ABORT(a) exit(a)
// Used for debugging
#define MARK std::cout << "Currently in file: " << __FILE__ << " line: " << __LINE__ << std::endl
typedef enum
{
WSPR,
TONE
} mode_type;
// WSRP nominal symbol time
#define WSPR_SYMTIME (8192.0 / 12000.0)
// How much random frequency offset should be added to WSPR transmissions
// if the --offset option has been turned on.
#define WSPR_RAND_OFFSET 80
#define WSPR15_RAND_OFFSET 8
// Disable the PWM clock and wait for it to become 'not busy'.
void disable_clock()
{
}
// Turn on TX
void txon()
{
// ACCESS_BUS_ADDR(PADS_GPIO_0_27_BUS) = 0x5a000018 + 7; //16mA +10.6dBm
disable_clock();
}
// Turn transmitter on
void txoff()
{
disable_clock();
}
// Transmit symbol sym for tsym seconds.
//
// TODO:
// Upon entering this function at the beginning of a WSPR transmission, we
// do not know which DMA table entry is being processed by the DMA engine.
#define PWM_CLOCKS_PER_ITER_NOMINAL 1000
void txSym(
const int &sym_num,
const double &center_freq,
const double &tone_spacing,
const double &tsym,
const std::vector<double> &dma_table_freq,
const double &f_pwm_clk,
struct PageInfo instrs[],
struct PageInfo &constPage,
int &bufPtr)
{
}
// Turn off (reset) DMA engine
void unSetupDMA()
{
txoff();
}
// Truncate at bit lsb. i.e. set all bits less than lsb to zero.
double bit_trunc(
const double &d,
const int &lsb)
{
return floor(d / pow(2.0, lsb)) * pow(2.0, lsb);
}
// Convert string to uppercase
void to_upper(
char *str)
{
while (*str)
{
*str = toupper(*str);
str++;
}
}
// Encode call, locator, and dBm into WSPR codeblock.
void wspr(
const char *call,
const char *l_pre,
const char *dbm,
unsigned char *symbols)
{
// pack prefix in nadd, call in n1, grid, dbm in n2
char *c, buf[16];
strncpy(buf, call, 16);
c = buf;
to_upper(c);
unsigned long ng, nadd = 0;
if (strchr(c, '/'))
{ // prefix-suffix
nadd = 2;
int i = strchr(c, '/') - c; // stroke position
int n = strlen(c) - i - 1; // suffix len, prefix-call len
c[i] = '\0';
if (n == 1)
ng = 60000 - 32768 + (c[i + 1] >= '0' && c[i + 1] <= '9' ? c[i + 1] - '0' : c[i + 1] == ' ' ? 38
: c[i + 1] - 'A' + 10); // suffix /A to /Z, /0 to /9
if (n == 2)
ng = 60000 + 26 + 10 * (c[i + 1] - '0') + (c[i + 2] - '0'); // suffix /10 to /99
if (n > 2)
{ // prefix EA8/, right align
ng = (i < 3 ? 36 : c[i - 3] >= '0' && c[i - 3] <= '9' ? c[i - 3] - '0'
: c[i - 3] - 'A' + 10);
ng = 37 * ng + (i < 2 ? 36 : c[i - 2] >= '0' && c[i - 2] <= '9' ? c[i - 2] - '0'
: c[i - 2] - 'A' + 10);
ng = 37 * ng + (i < 1 ? 36 : c[i - 1] >= '0' && c[i - 1] <= '9' ? c[i - 1] - '0'
: c[i - 1] - 'A' + 10);
if (ng < 32768)
nadd = 1;
else
ng = ng - 32768;
c = c + i + 1;
}
}
int i = (isdigit(c[2]) ? 2 : isdigit(c[1]) ? 1
: 0); // last prefix digit of de-suffixed/de-prefixed callsign
int n = strlen(c) - i - 1; // 2nd part of call len
unsigned long n1;
n1 = (i < 2 ? 36 : c[i - 2] >= '0' && c[i - 2] <= '9' ? c[i - 2] - '0'
: c[i - 2] - 'A' + 10);
n1 = 36 * n1 + (i < 1 ? 36 : c[i - 1] >= '0' && c[i - 1] <= '9' ? c[i - 1] - '0'
: c[i - 1] - 'A' + 10);
n1 = 10 * n1 + c[i] - '0';
n1 = 27 * n1 + (n < 1 ? 26 : c[i + 1] - 'A');
n1 = 27 * n1 + (n < 2 ? 26 : c[i + 2] - 'A');
n1 = 27 * n1 + (n < 3 ? 26 : c[i + 3] - 'A');
// if(rand() % 2) nadd=0;
if (!nadd)
{
// Copy locator locally since it is declared const and we cannot modify
// its contents in-place.
char l[4];
strncpy(l, l_pre, 4);
to_upper(l); // grid square Maidenhead locator (uppercase)
ng = 180 * (179 - 10 * (l[0] - 'A') - (l[2] - '0')) + 10 * (l[1] - 'A') + (l[3] - '0');
}
int p = atoi(dbm); // EIRP in dBm={0,3,7,10,13,17,20,23,27,30,33,37,40,43,47,50,53,57,60}
int corr[] = {0, -1, 1, 0, -1, 2, 1, 0, -1, 1};
p = p > 60 ? 60 : p < 0 ? 0
: p + corr[p % 10];
unsigned long n2 = (ng << 7) | (p + 64 + nadd);
// pack n1,n2,zero-tail into 50 bits
char packed[11] = {
static_cast<char>(n1 >> 20),
static_cast<char>(n1 >> 12),
static_cast<char>(n1 >> 4),
static_cast<char>(((n1 & 0x0f) << 4) | ((n2 >> 18) & 0x0f)),
static_cast<char>(n2 >> 10),
static_cast<char>(n2 >> 2),
static_cast<char>((n2 & 0x03) << 6),
0,
0,
0,
0};
// convolutional encoding K=32, r=1/2, Layland-Lushbaugh polynomials
int k = 0;
int j, s;
int nstate = 0;
unsigned char symbol[176];
for (j = 0; j != sizeof(packed); j++)
{
for (i = 7; i >= 0; i--)
{
unsigned long poly[2] = {0xf2d05351L, 0xe4613c47L};
nstate = (nstate << 1) | ((packed[j] >> i) & 1);
for (s = 0; s != 2; s++)
{ // convolve
unsigned long n = nstate & poly[s];
int even = 0; // even := parity(n)
while (n)
{
even = 1 - even;
n = n & (n - 1);
}
symbol[k] = even;
k++;
}
}
}
// interleave symbols
const unsigned char npr3[162] = {
1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0,
0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0,
0, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 1, 0, 1, 0,
0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 1,
0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0,
0, 0};
for (i = 0; i != 162; i++)
{
// j0 := bit reversed_values_smaller_than_161[i]
unsigned char j0;
p = -1;
for (k = 0; p != i; k++)
{
for (j = 0; j != 8; j++) // j0:=bit_reverse(k)
j0 = ((k >> j) & 1) | (j0 << 1);
if (j0 < 162)
p++;
}
symbols[j0] = npr3[j0] | symbol[i] << 1; // interleave and add sync std::vector
}
}
// Wait for the system clock's minute to reach one second past 'minute'
void wait_every(
int minute)
{
time_t t;
struct tm *ptm;
for (;;)
{
time(&t);
ptm = gmtime(&t);
if ((ptm->tm_min % minute) == 0 && ptm->tm_sec == 0)
break;
usleep(1000);
}
usleep(1000000); // wait another second
}
void print_usage()
{
std::cout << "Usage:" << std::endl;
std::cout << " wspr [options] callsign locator tx_pwr_dBm f1 <f2> <f3> ..." << std::endl;
std::cout << " OR" << std::endl;
std::cout << " wspr [options] --test-tone f" << std::endl;
std::cout << std::endl;
std::cout << "Options:" << std::endl;
std::cout << " -h --help" << std::endl;
std::cout << " Print out this help screen." << std::endl;
std::cout << " -p --ppm ppm" << std::endl;
std::cout << " Known PPM correction to 19.2MHz RPi nominal crystal frequency." << std::endl;
std::cout << " -s --self-calibration" << std::endl;
std::cout << " Check NTP before every transmission to obtain the PPM error of the" << std::endl;
std::cout << " crystal (default setting!)." << std::endl;
std::cout << " -f --free-running" << std::endl;
std::cout << " Do not use NTP to correct frequency error of RPi crystal." << std::endl;
std::cout << " -r --repeat" << std::endl;
std::cout << " Repeatedly, and in order, transmit on all the specified command line freqs." << std::endl;
std::cout << " -x --terminate <n>" << std::endl;
std::cout << " Terminate after n transmissions have been completed." << std::endl;
std::cout << " -o --offset" << std::endl;
std::cout << " Add a random frequency offset to each transmission:" << std::endl;
std::cout << " +/- " << WSPR_RAND_OFFSET << " Hz for WSPR" << std::endl;
std::cout << " +/- " << WSPR15_RAND_OFFSET << " Hz for WSPR-15" << std::endl;
std::cout << " -t --test-tone freq" << std::endl;
std::cout << " Simply output a test tone at the specified frequency. Only used" << std::endl;
std::cout << " for debugging and to verify calibration." << std::endl;
std::cout << " -n --no-delay" << std::endl;
std::cout << " Transmit immediately, do not wait for a WSPR TX window. Used" << std::endl;
std::cout << " for testing only." << std::endl;
std::cout << std::endl;
std::cout << "Frequencies can be specified either as an absolute TX carrier frequency, or" << std::endl;
std::cout << "using one of the following strings. If a string is used, the transmission" << std::endl;
std::cout << "will happen in the middle of the WSPR region of the selected band." << std::endl;
std::cout << " LF LF-15 MF MF-15 160m 160m-15 80m 60m 40m 30m 20m 17m 15m 12m 10m 6m 4m 2m" << std::endl;
std::cout << "<B>-15 indicates the WSPR-15 region of band <B>." << std::endl;
std::cout << std::endl;
std::cout << "Transmission gaps can be created by specifying a TX frequency of 0" << std::endl;
}
void parse_commandline(
// Inputs
const int &argc,
char *const argv[],
// Outputs
std::string &callsign,
std::string &locator,
std::string &tx_power,
std::vector<double> &center_freq_set,
double &ppm,
bool &self_cal,
bool &repeat,
bool &random_offset,
double &test_tone,
bool &no_delay,
mode_type &mode,
int &terminate)
{
// Default values
ppm = 0;
self_cal = true;
repeat = false;
random_offset = false;
test_tone = NAN;
no_delay = false;
mode = WSPR;
terminate = -1;
static struct option long_options[] = {
{"help", no_argument, 0, 'h'},
{"ppm", required_argument, 0, 'p'},
{"self-calibration", no_argument, 0, 's'},
{"free-running", no_argument, 0, 'f'},
{"repeat", no_argument, 0, 'r'},
{"terminate", required_argument, 0, 'x'},
{"offset", no_argument, 0, 'o'},
{"test-tone", required_argument, 0, 't'},
{"no-delay", no_argument, 0, 'n'},
{0, 0, 0, 0}};
while (true)
{
/* getopt_long stores the option index here. */
int option_index = 0;
int c = getopt_long(argc, argv, "hp:sfrx:ot:n",
long_options, &option_index);
if (c == -1)
break;
switch (c)
{
char *endp;
case 0:
// Code should only get here if a long option was given a non-null
// flag value.
std::cout << "Check code!" << std::endl;
ABORT(-1);
break;
case 'h':
print_usage();
ABORT(-1);
break;
case 'p':
ppm = strtod(optarg, &endp);
if ((optarg == endp) || (*endp != '\0'))
{
std::cerr << "Error: could not parse ppm value" << std::endl;
ABORT(-1);
}
break;
case 's':
self_cal = true;
break;
case 'f':
self_cal = false;
break;
case 'r':
repeat = true;
break;
case 'x':
terminate = strtol(optarg, &endp, 10);
if ((optarg == endp) || (*endp != '\0'))
{
std::cerr << "Error: could not parse termination argument" << std::endl;
ABORT(-1);
}
if (terminate < 1)
{
std::cerr << "Error: termination parameter must be >= 1" << std::endl;
ABORT(-1);
}
break;
case 'o':
random_offset = true;
break;
case 't':
test_tone = strtod(optarg, &endp);
mode = TONE;
if ((optarg == endp) || (*endp != '\0'))
{
std::cerr << "Error: could not parse test tone frequency" << std::endl;
ABORT(-1);
}
break;
case 'n':
no_delay = true;
break;
case '?':
/* getopt_long already printed an error message. */
ABORT(-1);
default:
ABORT(-1);
}
}
// Parse the non-option parameters
unsigned int n_free_args = 0;
while (optind < argc)
{
// Check for callsign, locator, tx_power
if (n_free_args == 0)
{
callsign = argv[optind++];
n_free_args++;
continue;
}
if (n_free_args == 1)
{
locator = argv[optind++];
n_free_args++;
continue;
}
if (n_free_args == 2)
{
tx_power = argv[optind++];
n_free_args++;
continue;
}
// Must be a frequency
// First see if it is a string.
double parsed_freq;
if (!strcasecmp(argv[optind], "LF"))
{
parsed_freq = 137500.0;
}
else if (!strcasecmp(argv[optind], "LF-15"))
{
parsed_freq = 137612.5;
}
else if (!strcasecmp(argv[optind], "MF"))
{
parsed_freq = 475700.0;
}
else if (!strcasecmp(argv[optind], "MF-15"))
{
parsed_freq = 475812.5;
}
else if (!strcasecmp(argv[optind], "160m"))
{
parsed_freq = 1838100.0;
}
else if (!strcasecmp(argv[optind], "160m-15"))
{
parsed_freq = 1838212.5;
}
else if (!strcasecmp(argv[optind], "80m"))
{
parsed_freq = 3594100.0;
}
else if (!strcasecmp(argv[optind], "60m"))
{
parsed_freq = 5288700.0;
}
else if (!strcasecmp(argv[optind], "40m"))
{
parsed_freq = 7040100.0;
}
else if (!strcasecmp(argv[optind], "30m"))
{
parsed_freq = 10140200.0;
}
else if (!strcasecmp(argv[optind], "20m"))
{
parsed_freq = 14097100.0;
}
else if (!strcasecmp(argv[optind], "17m"))
{
parsed_freq = 18106100.0;
}
else if (!strcasecmp(argv[optind], "15m"))
{
parsed_freq = 21096100.0;
}
else if (!strcasecmp(argv[optind], "12m"))
{
parsed_freq = 24926100.0;
}
else if (!strcasecmp(argv[optind], "10m"))
{
parsed_freq = 28126100.0;
}
else if (!strcasecmp(argv[optind], "6m"))
{
parsed_freq = 50294500.0;
}
else if (!strcasecmp(argv[optind], "4m"))
{
parsed_freq = 70092500.0;
}
else if (!strcasecmp(argv[optind], "2m"))
{
parsed_freq = 144490500.0;
}
else if (!strcasecmp(argv[optind], "70cm"))
{
parsed_freq = 432300500.0;
}
else
{
// Not a string. See if it can be parsed as a double.
char *endp;
parsed_freq = strtod(argv[optind], &endp);
if ((optarg == endp) || (*endp != '\0'))
{
std::cerr << "Error: could not parse transmit frequency: " << argv[optind] << std::endl;
ABORT(-1);
}
}
optind++;
center_freq_set.push_back(parsed_freq);
}
// Convert to uppercase
transform(callsign.begin(), callsign.end(), callsign.begin(), ::toupper);
transform(locator.begin(), locator.end(), locator.begin(), ::toupper);
// Check consistency among command line options.
if (ppm && self_cal)
{
std::cout << "Warning: ppm value is being ignored!" << std::endl;
ppm = 0.0;
}
if (mode == TONE)
{
if ((callsign != "") || (locator != "") || (tx_power != "") || (center_freq_set.size() != 0) || random_offset)
{
std::cerr << "Warning: callsign, locator, etc. are ignored when generating test tone" << std::endl;
}
random_offset = 0;
if (test_tone <= 0)
{
std::cerr << "Error: test tone frequency must be positive" << std::endl;
ABORT(-1);
}
}
else
{
if ((callsign == "") || (locator == "") || (tx_power == "") || (center_freq_set.size() == 0))
{
std::cerr << "Error: must specify callsign, locator, dBm, and at least one frequency" << std::endl;
std::cerr << "Try: wspr --help" << std::endl;
ABORT(-1);
}
}
// Print a summary of the parsed options
if (mode == WSPR)
{
std::cout << "WSPR packet contents:" << std::endl;
std::cout << " Callsign: " << callsign << std::endl;
std::cout << " Locator: " << locator << std::endl;
std::cout << " Power: " << tx_power << " dBm" << std::endl;
std::cout << "Requested TX frequencies:" << std::endl;
std::stringstream temp;
for (unsigned int t = 0; t < center_freq_set.size(); t++)
{
temp << std::setprecision(6) << std::fixed;
temp << " " << center_freq_set[t] / 1e6 << " MHz" << std::endl;
}
std::cout << temp.str();
temp.str("");
if (self_cal)
{
temp << " NTP will be used to periodically calibrate the transmission frequency" << std::endl;
}
else if (ppm)
{
temp << " PPM value to be used for all transmissions: " << ppm << std::endl;
}
if (terminate > 0)
{
temp << " TX will stop after " << terminate << " transmissions." << std::endl;
}
else if (repeat)
{
temp << " Transmissions will continue forever until stopped with CTRL-C" << std::endl;
}
if (random_offset)
{
temp << " A small random frequency offset will be added to all transmissions" << std::endl;
}
if (temp.str().length())
{
std::cout << "Extra options:" << std::endl;
std::cout << temp.str();
}
std::cout << std::endl;
}
else
{
std::stringstream temp;
temp << std::setprecision(6) << std::fixed << "A test tone will be generated at frequency " << test_tone / 1e6 << " MHz" << std::endl;
std::cout << temp.str();
if (self_cal)
{
std::cout << "NTP will be used to calibrate the tone frequency" << std::endl;
}
else if (ppm)
{
std::cout << "PPM value to be used to generate the tone: " << ppm << std::endl;
}
std::cout << std::endl;
}
}
// Call ntp_adjtime() to obtain the latest calibration coefficient.
void update_ppm(
double &ppm)
{
struct timex ntx;
int status;
double ppm_new;
ntx.modes = 0; /* only read */
status = ntp_adjtime(&ntx);
if (status != TIME_OK)
{
// cerr << "Error: clock not synchronized" << std::endl;
// return;
}
ppm_new = (double)ntx.freq / (double)(1 << 16); /* frequency scale */
if (abs(ppm_new) > 200)
{
std::cerr << "Warning: absolute ppm value is greater than 200 and is being ignored!" << std::endl;
}
else
{
if (ppm != ppm_new)
{
std::cout << " Obtained new ppm value: " << ppm_new << std::endl;
}
ppm = ppm_new;
}
}
/* Return 1 if the difference is negative, otherwise 0. */
// From StackOverflow:
// http://stackoverflow.com/questions/1468596/c-programming-calculate-elapsed-time-in-milliseconds-unix
int timeval_subtract(struct timeval *result, struct timeval *t2, struct timeval *t1)
{
long int diff = (t2->tv_usec + 1000000 * t2->tv_sec) - (t1->tv_usec + 1000000 * t1->tv_sec);
result->tv_sec = diff / 1000000;
result->tv_usec = diff % 1000000;
return (diff < 0);
}
void timeval_print(struct timeval *tv)
{
char buffer[30];
time_t curtime;
// printf("%ld.%06ld", tv->tv_sec, tv->tv_usec);
curtime = tv->tv_sec;
// strftime(buffer, 30, "%m-%d-%Y %T", localtime(&curtime));
strftime(buffer, 30, "UTC %Y-%m-%d %T", gmtime(&curtime));
printf("%s.%03ld", buffer, (tv->tv_usec + 500) / 1000);
}
// Called when exiting or when a signal is received.
void cleanup()
{
if (clk != NULL)
{
delete clk;
clk = NULL;
}
if (ngfmtest != NULL)
{
delete ngfmtest;
ngfmtest = NULL;
}
}
// Called when a signal is received. Automatically calls cleanup().
void cleanupAndExit(int sig)
{
std::cerr << "Exiting with error; caught signal: " << sig << std::endl;
cleanup();
ABORT(-1);
}
int main(const int argc, char *const argv[])
{
// catch all signals (like ctrl+c, ctrl+z, ...) to ensure DMA is disabled
for (int i = 0; i < 64; i++)
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = cleanupAndExit;
sigaction(i, &sa, NULL);
}
atexit(cleanup);
// Initialize the RNG
srand(time(NULL));
// Parse arguments
std::string callsign;
std::string locator;
std::string tx_power;
std::vector<double> center_freq_set;
double ppm;
bool self_cal;
bool repeat;
bool random_offset;
double test_tone;
bool no_delay;
mode_type mode;
int terminate;
parse_commandline(
argc,
argv,
callsign,
locator,
tx_power,
center_freq_set,
ppm,
self_cal,
repeat,
random_offset,
test_tone,
no_delay,
mode,
terminate);
int nbands = center_freq_set.size();
if (mode == TONE)
{
if (clk == NULL)
clk = new clkgpio;
clk->SetAdvancedPllMode(true);
// Test tone mode...
double wspr_symtime = WSPR_SYMTIME;
double tone_spacing = 1.0 / wspr_symtime;
std::stringstream temp;
temp << std::setprecision(6) << std::fixed << "Transmitting test tone on frequency " << test_tone / 1.0e6 << " MHz" << std::endl;
std::cout << temp.str();
std::cout << "Press CTRL-C to exit!" << std::endl;
txon();
int bufPtr = 0;
// Set to non-zero value to ensure setupDMATab is called at least once.
double ppm_prev = 123456;
double center_freq_actual;
// SetTone
clk->SetCenterFrequency(test_tone, 100);
clk->enableclk(4);
clk->SetFrequency(000);
while (true)
usleep(1000000);
// Should never get here...
}
else
{
// WSPR mode
// Create WSPR symbols
unsigned char symbols[162];
wspr(callsign.c_str(), locator.c_str(), tx_power.c_str(), symbols);
/*
printf("WSPR codeblock: ");
for (int i = 0; i < (signed)(sizeof(symbols)/sizeof(*symbols)); i++) {
if (i) {
std::cout << ",";
}
printf("%d", symbols[i]);
}
printf("\n");
*/
std::cout << "Ready to transmit (setup complete)..." << std::endl;
int band = 0;
int n_tx = 0;
for (;;)
{
// Calculate WSPR parameters for this transmission
double center_freq_desired;
center_freq_desired = center_freq_set[band];
bool wspr15 =
(center_freq_desired > 137600 && center_freq_desired < 137625) ||
(center_freq_desired > 475800 && center_freq_desired < 475825) ||
(center_freq_desired > 1838200 && center_freq_desired < 1838225);
double wspr_symtime = (wspr15) ? 8.0 * WSPR_SYMTIME : WSPR_SYMTIME;
double tone_spacing = 1.0 / wspr_symtime;
// Add random offset
if ((center_freq_desired != 0) && random_offset)
{
center_freq_desired += (2.0 * rand() / ((double)RAND_MAX + 1.0) - 1.0) * (wspr15 ? WSPR15_RAND_OFFSET : WSPR_RAND_OFFSET);
}
// Status message before transmission
std::stringstream temp;
temp << std::setprecision(6) << std::fixed;
temp << "Desired center frequency for " << (wspr15 ? "WSPR-15" : "WSPR") << " transmission: " << center_freq_desired / 1e6 << " MHz" << std::endl;
std::cout << temp.str();
// Wait for WSPR transmission window to arrive.
if (no_delay)
{
std::cout << " Transmitting immediately (not waiting for WSPR window)" << std::endl;
}
else
{
std::cout << " Waiting for next WSPR transmission window..." << std::endl;
wait_every((wspr15) ? 15 : 2);
}
// Update crystal calibration information
if (self_cal)
{
update_ppm(ppm);
}
// Create the DMA table for this center frequency
std::vector<double> dma_table_freq;
double center_freq_actual;
if (center_freq_desired)
{
center_freq_actual = center_freq_desired;
}
else
{
center_freq_actual = center_freq_desired;
}
// Send the message!
// std::cout << "TX started!" << std::endl;
if (center_freq_actual)
{
// Print a status message right before transmission begins.
struct timeval tvBegin, tvEnd, tvDiff;
gettimeofday(&tvBegin, NULL);
std::cout << " TX started at: ";
timeval_print(&tvBegin);
std::cout << std::endl;
struct timeval sym_start;
struct timeval diff;
int bufPtr = 0;
int Upsample = 10000;
int SR = Upsample * 1 / wspr_symtime;
int FifoSize = 40000;
bool usePWMSample = false;
static float *FreqPWM = NULL;
//New modulator and tx on
ngfmtest = new ngfmdmasync(center_freq_actual, SR, 14, FifoSize, true);
FreqPWM = (float *)malloc(Upsample * sizeof(float));
double FreqResolution = ngfmtest->GetFrequencyResolution();
double RealFreq = ngfmtest->GetRealFrequency(0);
if (FreqResolution > tone_spacing)
{
fprintf(stderr, "Freq resolution=%f - Tone spacing =%f Erreur tuning=%f\n", FreqResolution, tone_spacing, RealFreq);
usePWMSample = true;
}
for (int i = 0; i < 162; i++)
{
double tone_freq = -1.5 * tone_spacing + symbols[i] * tone_spacing - RealFreq;
int Nbtx = 0;
int f1 = 0;
int Frac = ngfmtest->GetMasterFrac(0);
int IntFreq = floor(tone_freq / FreqResolution);
double ToneFreqInf = tone_freq - IntFreq;
int Step = ToneFreqInf * Upsample / FreqResolution;
if (!usePWMSample)
{
for (int j = 0; j < Upsample; j++)
{
FreqPWM[j] = tone_freq;
}
}
else
{
// Todo : Implement PWMFrequency to obtain better frequency resolution
for (int j = 0; j < Upsample; j++)
{
FreqPWM[j] = tone_freq;
}
}
ngfmtest->SetFrequencySamples(FreqPWM, Upsample);
}
n_tx++;
// Turn transmitter off
ngfmtest->disableclk(4);
delete ngfmtest;
ngfmtest = NULL;
free(FreqPWM);
// End timestamp
gettimeofday(&tvEnd, NULL);
std::cout << " TX ended at: ";
timeval_print(&tvEnd);
timeval_subtract(&tvDiff, &tvEnd, &tvBegin);
printf(" (%ld.%03ld s)\n", tvDiff.tv_sec, (tvDiff.tv_usec + 500) / 1000);
}
else
{
std::cout << " Skipping transmission" << std::endl;
usleep(1000000);
}
// Advance to next band
band = (band + 1) % nbands;
if ((band == 0) && !repeat)
{
break;
}
if ((terminate > 0) && (n_tx >= terminate))
{
break;
}
}
}
return 0;
}
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