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hl2_tcp.c
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//
// hl2_tcp.c
//
#define VERSION "v.1.3.129" // 2020-06-29 01
// macOS : clang -lm -lpthread -Os -o hl2_tcp hl2_tcp.c
// pi : cc -lm -lpthread -Os -o hl2_tcp hl2_tcp.c
//
// Serves IQ data using the rtl_tcp protocol
// from an Hermes Lite 2 on port 1024
// to iPv6 port 1234
//
// initial version 2020-01-27 rhn
//
// Copyright 2017,2020 Ronald H Nicholson Jr. All Rights Reserved.
// This code may only be redistributed under terms of
// the Mozilla Public License 2.0 plus Exhibit B (no copyleft exception)
// See: https://www.mozilla.org/en-US/MPL/2.0/
// #define TX_OK
// #define SPECIAL_CMD_OK
// #define NO_MAIN
#ifdef __clang__
#endif
#define TITLE ("hl2_tcp ")
#define SOCKET_READ_TIMEOUT ( 30.0 * 60.0 ) // 30 minutes in seconds
#define SAMPLE_BITS ( 8) // default to match rtl_tcp
// #define SAMPLE_BITS (16) // default to match rsp_tcp
// #define SAMPLE_BITS (32) // HPSDR 24-bit->float32 IQ data ?
#define GAIN8 (4096.0) // default gain ?
#define TCP_PORT (1234) // default rtp_tcp server port
#define HERMES_PORT (1024) // UDP port
#define RING_BUFFER_ALLOCATION (2L * 1024L * 1024L) // 2MB
#define MAX_NUMBER_OF_START_COMMANDS (8)
#define START_LOOP_DELAY (50000) // microseconds
#define _POSIX_C_SOURCE 200112L
#include <stdio.h>
#include <signal.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <ctype.h>
#include <inttypes.h>
#include <unistd.h>
#include <math.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <ifaddrs.h>
#include <fcntl.h>
#include <pthread.h>
#include <sys/time.h>
#ifndef _UNISTD_H_
int usleep(unsigned long int usec);
#endif
#ifndef M_PI
#define M_PI (3.14159265358979323846264)
typedef void *caddr_t;
#endif
static void sighandler(int signum);
void *tcp_connection_handler(void); // main thread
void *udp_rcv_thread_runner(void *param); // on a pthread
int discover_main(void);
void hl2_stop(void);
void print_hl2_stats(void) ;
void setFilterEnables(void) ;
uint32_t hl2_ipAddr = 0x7f000001; // 127.0.0.1 == localhost
int portno = TCP_PORT; //
int hl2_running = 0; // Metis response
int udp_running = 0; // udp socket live
int C0_addr = 0; //
volatile int hermes_rx_freq = 14100000; // 100k to 30M
volatile int hermes_tx_freq = 0; //
volatile int hermes_tx_offset = 0; //
volatile int hermes_lna_gain = 19; // LNA gain -12 to +48 dB
int hermes_tx_drive_level = 0; // 0 .. 15
int hermes_enable_power_amp = 0; //
int hermes_Q5_switch_ext_ptt_lp = 0;
int tx_gear_ratio = 1;
int tx_gear_counter = 0;
volatile int seqNum = 0; // tx sequence number
// Rx and Tx filters; default no HPF ?
int n2adr_filter_rx = 0;
int n2adr_filter_tx = 0;
int sendErrorFlag = 0;
int sampleBits = SAMPLE_BITS;
int sampleRates = 1;
long int totalSamples = 0;
long sampRate = 192000; // 768000;
long previousSRate = -1;
int gClientSocketID = -1;
char *ring_buffer_ptr = NULL;
int decimateFlag = 1;
int decimateCntr = 0;
volatile float gain0 = GAIN8;
struct sigaction sigact, sigign;
int tcp_listen_sockfd = -1;
static volatile int do_exit = 0;
float acc_r = 0.0; // accumulated rounding
float sMax = 0.0; // for debug
float sMin = 0.0;
int sendblockcount = 0;
int threads_running = 0;
char *hl2_ip_string = "127.0.0.1"; // 0x7f000001 == localhost
// for TX_OK
long int tcp_tx_cmd = 0;
int tx_key_down = 0; // Morse code key
int hl2_tx_on = 0; // tx ptt
int tx_delay = 0; // tx/ptt hold time
int last_key_down = 0;
int tx_param_x = 0;
int tx_param_w = 0;
#ifdef TX_OK
extern void tx_setup();
extern void tx_cleanup();
extern int get_tx_key(void) ;
extern void tx_block_setup(int seqN);
extern void get_tx_sample(int *tx_i, int *tx_q) ;
extern int get_tx_drive(void) ;
extern int get_tx_offset();
#else
void tx_setup() { return; }
void tx_cleanup() { return; }
#define get_tx_key() (0)
#define tx_block_setup(X) // nop
#define get_tx_sample(X,Y) // nop
#define get_tx_drive() (0)
#define get_tx_offset() (0)
#endif
#ifdef SPECIAL_CMD_OK
extern int specialCommandCounter;
extern void checkForSpecialCommands(int seqN); // for special commands
#else
int specialCommandCounter = 0;
void checkForSpecialCommands(int n) { return; }
#endif
#ifdef DEBUG_FILE
char *dump_fname = DEBUG_FILE ;
#endif
char UsageString1[]
= "Usage: hl2_tcp -a hermes_IPaddr [-p local_port] [-b 8/16]";
char UsageString2[]
= " hl2_tcp -d ";
void print_usage_and_exit()
{
printf("%s\n", UsageString1);
printf("%s\n", UsageString2);
exit(0);
}
int hl2_tcp(void);
#ifndef NO_MAIN
// int tcp_main(int argc, char *argv[])
int main(int argc, char *argv[])
{
if (argc > 1) {
if (strcmp(argv[1], "-d") == 0) {
int e = discover_main();
return(e);
}
if ((argc % 2) != 1) {
print_usage_and_exit();
}
for (int arg=3; arg<=argc; arg+=2) {
if (strcmp(argv[arg-2], "-p") == 0) {
portno = atoi(argv[arg-1]);
if (portno == 0) {
printf("invalid port number entry %s\n", argv[arg-1]);
exit(0);
}
} else if (strcmp(argv[arg-2], "-b") == 0) {
if (strcmp(argv[arg-1],"16") == 0) {
sampleBits = 16;
} else if (strcmp(argv[arg-1],"8") == 0) {
sampleBits = 8;
} else {
print_usage_and_exit();
}
} else if (strcmp(argv[arg-2], "-a") == 0) {
hl2_ip_string = argv[arg-1];
} else if (strcmp(argv[arg-2], "-x") == 0) {
tx_param_x = atoi(argv[arg-1]);
} else {
print_usage_and_exit();
}
}
} else {
print_usage_and_exit();
}
return(hl2_tcp());
}
#endif
int hl2_tcp()
{
struct sockaddr_in6 serv_addr ;
char client_addr_ipv6[100];
printf("hl2_tcp Version %s\n", VERSION);
printf("Will look for Hermes Lite 2 at IP: %s UDP Port: %d \n",
hl2_ip_string, HERMES_PORT);
ring_buffer_ptr = (char *)malloc(RING_BUFFER_ALLOCATION + 4);
if (ring_buffer_ptr == NULL) { exit(-1); }
bzero(ring_buffer_ptr, RING_BUFFER_ALLOCATION + 2);
printf("Converts Metis to rtl_tcp format %d-bit IQ samples \n",
sampleBits);
printf("Starting hl2_tcp server on TCP port %d\n", portno);
tx_setup();
sigact.sa_handler = sighandler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGINT, &sigact, NULL);
sigaction(SIGTERM, &sigact, NULL);
sigaction(SIGQUIT, &sigact, NULL);
#ifdef __APPLE__
signal(SIGPIPE, SIG_IGN);
#else
sigign.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &sigign, NULL);
#endif
previousSRate = sampRate;
// printf("\nhl2_tcp server started on port %d\n", portno);
tcp_listen_sockfd = socket(AF_INET6, SOCK_STREAM, 0);
if (tcp_listen_sockfd < 0) {
printf("ERROR opening socket");
return(-1);
}
struct linger ling = {1,0};
int rr = 1;
setsockopt(tcp_listen_sockfd, SOL_SOCKET, SO_REUSEADDR,
(char *)&rr, sizeof(int));
setsockopt(tcp_listen_sockfd, SOL_SOCKET, SO_LINGER,
(char *)&ling, sizeof(ling));
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin6_flowinfo = 0;
serv_addr.sin6_family = AF_INET6;
serv_addr.sin6_addr = in6addr_any;
serv_addr.sin6_port = htons(portno);
// Sockets Layer Call: bind()
if (bind( tcp_listen_sockfd, (struct sockaddr *)&serv_addr,
sizeof(serv_addr) ) < 0) {
printf("ERROR on bind to listen\n");
return(-1);
}
listen(tcp_listen_sockfd, 5);
fprintf(stdout, "listening for socket connection \n");
while (1) {
// accept a connection
struct sockaddr_in6 cli_addr;
socklen_t claddrlen = sizeof(cli_addr);
gClientSocketID = accept( tcp_listen_sockfd,
(struct sockaddr *) &cli_addr,
&claddrlen );
if (gClientSocketID < 0) {
printf("ERROR on accept\n");
break;
}
inet_ntop(AF_INET6, &(cli_addr.sin6_addr), client_addr_ipv6, 100);
printf("\nConnected to client with IP address: %s\n",
client_addr_ipv6);
tcp_connection_handler();
printf("tcp connection ended \n");
}
udp_running = -1;
hl2_stop();
tx_cleanup();
fflush(stdout);
return 0;
} // main
static void sighandler(int signum)
{
fprintf(stderr, "Signal caught, exiting!\n");
fflush(stderr);
close(tcp_listen_sockfd);
if (gClientSocketID != 0) {
close(gClientSocketID);
gClientSocketID = -1;
}
udp_running = -1;
hl2_stop();
tx_cleanup();
exit(-1);
// do_exit = 1;
}
int stop_send_thread = 0;
int thread_counter = 0;
int thread_running = 0;
int ring_buffer_size = RING_BUFFER_ALLOCATION;
volatile long int ring_wr_index = 0;
volatile long int ring_rd_index = 0;
void ring_init()
{
ring_wr_index = 0;
ring_rd_index = 0;
}
int ring_data_available()
{
long int n = 0;
long int w_index = ring_wr_index; //
long int r_index = ring_rd_index; //
n = w_index - r_index;
if (n < 0) { n += ring_buffer_size; }
if (n < 0) { n = 0; } // error condition ?
if (n >= ring_buffer_size) { n = 0; } // error condition
return(n);
}
int ring_write(unsigned char *from_ptr, int amount)
{
int wrap = 0;
long int w_index = ring_wr_index; // my index
long int r_index = ring_rd_index; // other threads index
if ( ring_buffer_ptr == NULL ) { return(-1); }
if ( (w_index < 0)
|| (w_index >= ring_buffer_size) ) { return(-1); } // error !
if (decimateFlag > 1) {
int i;
for (i = 0; i < amount; i += 2) {
if (decimateCntr == 0) {
ring_buffer_ptr[w_index ] = from_ptr[i ];
ring_buffer_ptr[w_index+1] = from_ptr[i+1];
w_index += 2;
if (w_index >= ring_buffer_size) { w_index = 0; }
}
decimateCntr += 1;
if (decimateCntr >= decimateFlag) { decimateCntr = 0; }
}
} else if (w_index + amount < ring_buffer_size) {
memcpy(&ring_buffer_ptr[w_index], from_ptr, amount);
w_index += amount;
} else {
int i;
for (i = 0; i < amount; i += 1) {
ring_buffer_ptr[w_index] = from_ptr[i];
w_index += 1;
if (w_index >= ring_buffer_size) { w_index = 0; }
}
}
//
/// ToDo: insert memory barrier here
//
ring_wr_index = w_index; // update lock free input info
int m = ring_data_available();
if (m > ring_buffer_size/2) { wrap = 1; }
return(wrap);
}
int ring_read(unsigned char *to_ptr, int amount, int always)
{
int bytes_read = 0;
long int r_index = ring_rd_index; // my index
long int w_index = ring_wr_index; // other threads index
long int available = w_index - r_index;
if (available < 0) { available += ring_buffer_size; }
if (always != 0) {
bzero(to_ptr, amount);
}
if (available <= 0) { return(bytes_read); }
long int n = amount;
if (n > available) { n = available; } // min(n, available)
if (r_index + n < ring_buffer_size) {
memcpy(to_ptr, &ring_buffer_ptr[r_index], n);
r_index += n;
} else {
int i;
for (i = 0; i < n; i += 1) {
to_ptr[i] = ring_buffer_ptr[r_index];
r_index += 1;
if (r_index >= ring_buffer_size) { r_index = 0; }
}
}
bytes_read = n;
ring_rd_index = r_index; // update lock free extract info
return(bytes_read);
}
float tmpFPBuf[4*32768];
uint8_t tmpBuf[ 4*32768];
long int *param = NULL;
int tcp_send_poll()
{
int sz0 = 1408; // MTU size or 1008 ??
int pad = 32768 * 2;
ssize_t b = 0;
int send_sockfd = gClientSocketID ;
if (send_sockfd > 0) {
if (ring_data_available() >= (sz0 + pad)) {
int sz = ring_read(tmpBuf, sz0, 0);
if (sz > 0) {
if (totalSamples == 0) {
// fprintf(stderr, "hl2 udp IQ data received \n");
}
#ifdef __APPLE__
b = send(send_sockfd, tmpBuf, sz, 0);
#else
b = send(send_sockfd, tmpBuf, sz, MSG_NOSIGNAL);
#endif
if (b <= 0) { sendErrorFlag = -1; }
if (totalSamples == 0) {
fprintf(stderr,
"Started rtl_tcp IQ streaming with %ld bytes\n", b);
}
totalSamples += sz;
sendblockcount += 1;
}
pad = 0;
}
}
return(b);
}
int hl2_udp_setup(void);
void hl2_send_start_cmds(int n);
void hl2_udp_rcv(int loopFlag);
int hl2_udp_rcv_end(void);
void *tcp_connection_handler()
{
char buffer[256];
int m = 0;
int printCmdBytes = 0; //
int i;
if (do_exit != 0) { return(NULL); }
if (1) { // send 12 or 16-byte rtl_tcp header
ssize_t b = 0;
int sz = 16;
if (sampleBits == 8) { sz = 12; }
// "HL20" in 16 byte header
char header[16] = { 0x48,0x4C,0x32,0x30,
0x30,0x30,0x30+sampleRates,0x30+sampleBits,
0,0,0,1, 0,0,0,2 };
#ifdef __APPLE__
b = send(gClientSocketID, header, sz, 0);
#else
b = send(gClientSocketID, header, sz, MSG_NOSIGNAL);
#endif
/*
fprintf(stdout, "rtl_tcp header sent , %d bytes\n", n); //
fflush(stdout);
*/
}
sendErrorFlag = 0;
stop_send_thread = 0;
ring_wr_index = 0;
ring_rd_index = 0;
param = (long int *)malloc(4 * sizeof(long int)); // ToDo: fix leak
for (i=0;i<4;i++) { param[i] = 0; }
if (hl2_running == 0) {
ring_init();
hl2_udp_setup();
hl2_send_start_cmds(1);
pthread_t udp_rcv_thread;
if ( pthread_create( &udp_rcv_thread,
NULL ,
udp_rcv_thread_runner,
(void *)param ) < 0 ) {
printf("could not create udp streaming thread");
return(NULL);
} else {
printf("udp streaming thread started \n");
}
int n = MAX_NUMBER_OF_START_COMMANDS;
hl2_send_start_cmds(n);
}
acc_r = 0.0;
totalSamples = 0;
// printf("hl2 start status = %d\n", m);
if (m < 0) { exit(-1); }
usleep(250L * 1000L);
// set a timeout so receive call won't block forever
struct timeval timeout;
timeout.tv_sec = SOCKET_READ_TIMEOUT; // seconds
timeout.tv_usec = 0;
setsockopt( gClientSocketID, SOL_SOCKET, SO_RCVTIMEO,
&timeout, sizeof(timeout) );
ssize_t b = 1;
while ((b > 0) && (sendErrorFlag == 0)) {
int i, j;
// receive 5 byte commands (or a multiple thereof)
memset(buffer,0, 256);
b = recv(gClientSocketID, buffer, 255, 0);
if ((b <= 0) || (sendErrorFlag != 0)) {
udp_running = -1;
close(gClientSocketID);
gClientSocketID = -1;
// fprintf(stdout, "hl2 stop status = %d\n", m);
fflush(stdout);
break;
}
if (b > 0) {
for (i=0; i < b; i+=5) {
// decode 5 byte rtl_tcp command messages
int msg = 0x00ff & buffer[i];
if (printCmdBytes) { printf("0x%02x ", msg); }
int data = 0;
for (j=1;j<5;j++) {
int byte = (0x00ff & buffer[i+j]);
data = (256 * data) + byte;
if (printCmdBytes) { printf("0x%02x ", byte); }
}
if (printCmdBytes) { printf(" = %d\n", data); }
if (msg == 0x01) { // set frequency
int f0 = data;
if (f0 >= 100000 && f0 <= 30000000) {
hermes_rx_freq = f0; // hl2
setFilterEnables();
hermes_tx_offset = get_tx_offset();
}
fprintf(stdout, "setting frequency to: %d\n", f0);
} else if (msg == 0x02) { // set sample rate
int r = data;
if ( (r == 48000)
|| (r == 96000)
|| (r == 192000)
|| (r == 384000)) {
// if (r != previousSRate) {
sampRate = r;
tx_gear_ratio = r / 48000;
printf("setting samplerate to : %d\n", r);
// }
} else {
// ignore
}
} else if (msg == 0x03) { // other
fprintf(stdout, "message = %d, data = %d\n", msg, data);
} else if (msg == 0x04) { // gain
if ( (sampleBits == 8)
|| (sampleBits == 16) ) {
// set gain
// hermes_lna_gain : LNA gain -12 to +48 dB
//
float g1 = data; // data : in 10th dB's
float g2 = 0.1 * (float)(data); // undo 10ths
// fprintf(stdout, "setting gain to: %f dB\n", g2);
float g2h = g2 * 60.0 / 40.0 ;
int g9 = roundf(g2h - 12.0);
hermes_lna_gain = g9;
fprintf(stdout, "set hl2 lna gain to : %d\n", g9);
if (sampleBits == 16) {
gain0 = GAIN8 * 0.125;
} else {
gain0 = GAIN8 * 8.0;
}
}
#ifdef TX_OK
} else if (msg == 77) { // 0x4d tx command extension
tcp_tx_cmd = 3 * data; // 381 = 127 * 3
// printf("tcp_tx_cmd = %d \n", tcp_tx_cmd); //
#endif
} else { // other
fprintf(stdout, "message = %d, data = %d\n", msg, data);
if (msg == 8) {
fprintf(stdout, "set agc mode ignored\n");
}
}
}
}
if (b < 0) {
fprintf(stdout, "read socket timeout %ld \n", b);
fflush(stdout);
}
// loop until error (socket close) or timeout
} ;
if (m) {
fprintf(stdout,"stopping now 00 \n");
printf("hl2 stop status = %d\n", m);
}
udp_running = -1;
close(gClientSocketID);
gClientSocketID = -1;
return(param);
} // tcp_connection_handler()
// uint8_t tmpBuf[4*32768];
typedef union
{
uint32_t i;
float f;
} Float32_t;
float rand_float_co()
{
Float32_t x;
x.i = 0x3f800000 | (rand() & 0x007fffff);
return(x.f - 1.0f);
}
//
//
#define FILTER_HPF (0x40)
#define FILTER_160 (0x01)
#define FILTER_80 (0x02)
#define FILTER_40 (0x04)
#define FILTER_30_20 (0x08)
#define FILTER_17_15 (0x10)
#define FILTER_10 (0x20)
struct sockaddr_in recv_Addr;
socklen_t addrLen = sizeof(recv_Addr);
unsigned char udpBuffer[1600]; // Original Protocol Command & Control
//
double samp_db = 0.0;
float rnd0v = 0.0;
float rnd0u = 0.0;
float tmp_temperature = 0.0;
float tmp_fwd_power = 0.0;
float tmp_rev_power = 0.0;
float tmp_pa_current = 0.0;
int tmp_temp_count = 0;
int tmp_revp_count = 0;
float hermes_temperature = 0;
float hermes_fwd_power = 0;
float hermes_rev_power = 0;
float hermes_pa_current = 0;
int hwCmdState = 0;
int hwCmdSeqNum = 0;
unsigned char hwCmd[8] = { 0,0,0,0,0 }; // 1+4 fpga command bytes
void *udp_rcv_thread_runner(void *param)
{
if (hl2_running == 0) {
hl2_udp_rcv(1);
hl2_udp_rcv_end();
}
return(param);
}
// extract command replies, status, and 24-bit IQ
// transcode to 8 or 16 bit IQ
int handleRcvData(unsigned char *hl2Buf, int n)
{
unsigned char *buf = hl2Buf;
int j, jj;
int rcvSeqNum;
double samp_m2 = 0.0;
double g8 = gain0; // GAIN8;
unsigned char uv[1024];
int syncErr = ( (buf[11 - 3] != 0x7F)
|| (buf[11 - 2] != 0x7F)
|| (buf[11 - 1] != 0x7F));
if (syncErr) { return(-1); }
rcvSeqNum = (buf[4] << 24) | (buf[5] << 16) | (buf[6] << 8) | (buf[7]);
for (jj=0; jj<1024; jj+=512) {
int replyBit = (buf[jj+11] & 0x80) ;
int dt = rcvSeqNum - hwCmdSeqNum;
if (replyBit) {
int i;
int cmdEcho = (buf[jj+11] & 0x7F) >> 1;
printf("******** # %d hw cmd ack 0x%02x : ", dt, cmdEcho);
for (i=0;i<5;i++) { printf("0x%02x ", buf[jj+11+i]); }
printf("\n");
cmdEcho = hwCmd[0]; // ToDo: test or fix
if ( cmdEcho == hwCmd[0] ) {
hwCmdState = 0;
// command acknowledged ?
specialCommandCounter -= 1;
// hwCmdSeqNum = rcvSeqNum;
}
if (buf[jj+11] == 0xff) {
hwCmdState = -1;
fprintf(stdout,"******** hw cmd error \n" );
}
}
}
int dtype0 = buf[11 ] >> 3;
int dtype1 = buf[11+512] >> 3;
if (dtype0 == 1) {
int jj = 0;
tmp_temperature += ((buf[11+jj+1] << 8) | (buf[11+jj+2]));
tmp_fwd_power += ((buf[11+jj+3] << 8) | (buf[11+jj+4]));
tmp_temp_count += 1;
}
if (dtype1 == 1) {
int jj = 512;
tmp_temperature += ((buf[11+jj+1] << 8) | (buf[11+jj+2]));
tmp_fwd_power += ((buf[11+jj+3] << 8) | (buf[11+jj+4]));
tmp_temp_count += 1;
}
if (dtype0 == 2) {
tmp_rev_power += ((buf[11 + 1] << 8) | (buf[11 + 2]));
tmp_pa_current += ((buf[11 + 3] << 8) | (buf[11 + 4]));
tmp_revp_count += 1;
}
if (dtype1 == 2) {
int jj = 512;
tmp_rev_power += ((buf[11+jj+1] << 8) | (buf[11+jj+2]));
tmp_pa_current += ((buf[11+jj+3] << 8) | (buf[11+jj+4]));
tmp_revp_count += 1;
}
double scale = 32768.0 * 32768.0 * 2.0; // 33 bit shift
double scale_r = 1.0 / scale;
int16_t *tmp16ptr = (int16_t *)&uv[0];
int k = 0;
int kk = 0;
for (jj=0; jj<1024; jj+=512) {
for (j=8+jj+8; j<8+jj+512; j += 8) {
int imagp, realp;
double u,v;
// reversed order IQ
imagp = buf[j ] << 24 | buf[j + 1] << 16 | buf[j + 2] << 8;
realp = buf[j + 3] << 24 | buf[j + 4] << 16 | buf[j + 5] << 8;
v = realp;
u = imagp;
if (sampleBits == 16) { // for HERMES !!!
float g16;
g16 = 64.0 * 32768.0; // shift 22 bits up
// scale_r == shift 33 bits down
// total shift == 22 - 33 == 11 bits down
// 24 - 11 = 13 bits used (sign + 12 bits?)
float v1 = g16 * scale_r * v;
float u1 = g16 * scale_r * u;
int vv = (int)roundf(v1);
int uu = (int)roundf(u1);
tmp16ptr[kk ] = vv;
tmp16ptr[kk+1] = uu;
kk += 2; // 2 16-bit samples
k += 4; // is 4 bytes
} else { // convert to 8-bit samples for rtl_tcp compatibility
// magnitude for testing
samp_m2 += u*u + v*v;
// scale and add triangular noise shaping (dither)
float vv = g8 * scale_r * v;
float rnd1v = rand_float_co();
float rv = rnd1v - rnd0v;
vv = vv + rv;
float rvv = roundf(vv);
int vi = (int)rvv;
rnd0v = rnd1v;
float uu = g8 * scale_r * u;
float rnd1u = rand_float_co();
float ru = rnd1u - rnd0u;
uu = uu + ru;
float ruu = roundf(uu);
int ui = (int)ruu;
rnd0u = rnd1u;
// unsigned 8-bit samples
uv[k] = vi + 128;
uv[k+1] = ui + 128;
k += 2; // 2 bytes for 8-bit IQ
}
}
}
ring_write(&uv[0], k);
//
int nSamples = (2 * (512-8))/4; // == 1008/4 == 252
double samp_rms = sqrt(samp_m2 / nSamples) / scale;
if (samp_rms > 0.0) {
samp_db = 20.0 * log10(samp_rms);
}
//
if (tmp_temp_count >= 16) {
hermes_temperature = tmp_temperature / (float)tmp_temp_count;
hermes_rev_power = tmp_fwd_power / (float)tmp_temp_count;
tmp_temperature = 0.0;
tmp_fwd_power = 0.0;
tmp_temp_count = 0;
}
if (tmp_revp_count >= 16) {
hermes_fwd_power = tmp_rev_power / (float)tmp_revp_count;
tmp_rev_power = 0.0;
float tmp2_pa_current ;
float tmp3_pa_current ;
tmp2_pa_current = tmp_pa_current / (float)tmp_revp_count;
tmp3_pa_current = 3.26 * tmp2_pa_current / (4096.0 * 50.0 * 0.04);
hermes_pa_current = 1270.0 * tmp3_pa_current / 1000.0;
tmp_pa_current = 0.0;
tmp_revp_count = 0;
}
return(k);
}
void dump_iq_buf(unsigned char *buf)
{
int k;
// 1032 - 8 = 1024 // 8 -> effe0406 sequence4
// 1024 = 2 * 512
// 512 - 8 = 63 * 4+4 IQ // 8 -> 7f 7f 7f c0 c1 c2 c3 c4
// 63 * 8 = 504
// 504 * 2 = 1008
for (k=0;k<16;k++) {
int c = buf[k];
fprintf(stdout,"%02x ",c);
}
fprintf(stdout,"\n ");
for (k=512+8;k<512+16;k++) {
int c = buf[k];
fprintf(stdout,"%02x ",c);
}
fprintf(stdout,"\n");
int seq0 = buf[4] << 24 | buf[5] << 16 | buf[6] << 8 | buf[7];
printf("seq = %d \n", seq0);
#ifdef DEBUG_FILE
double samp_msq = 0.0; // magnitude squared
double samp_rms = 0.0;
double scale = 32768.0 * 32768.0 * 2.0; // 33 bit shift
if (dump_fname == NULL) { return; }
FILE *f = fopen(dump_fname,"w");
if (f == NULL) { return; }
// printf("file 0x%08x \n", f);
for (k=0;k<16;k++) {
int c = buf[k];
fprintf(f,"%02x ",c);
}
printf(" : ");
for (k=512+8;k<512+16;k++) {
int c = buf[k];
fprintf(f,"%02x ",c);
}
fprintf(f,"\n");
int j;
int xr, xi ;
double v, u;
for (j=8+8; j<8+512; j += 8) {
xr = buf[j + 3] << 24 | buf[j + 4] << 16 | buf[j + 5] << 8;
xi = buf[j ] << 24 | buf[j + 1] << 16 | buf[j + 2] << 8;
v = xr;
u = xi;
fprintf(f,"%4d 0x%08x 0x%08x \t%lf \t%lf \n",
(j-16)/8, xr, xi, v/scale, u/scale);
samp_msq += u*u + v*v;
}
for (j=8+512+8; j<8+1024; j+= 8) {
xr = buf[j + 3] << 24 | buf[j + 4] << 16 | buf[j + 5] << 8;
xi = buf[j ] << 24 | buf[j + 1] << 16 | buf[j + 2] << 8;
v = xr;
u = xi;
//
fprintf(f,"%4d 0x%08x 0x%08x \t%lf \t%lf \n",
(j-16)/8, xr, xi, v/scale, u/scale);
samp_msq += u*u + v*v;
}
fclose(f);
int nSamples = (2 * (512-8))/4; // == 1008/4 == 252
samp_rms = sqrt(samp_msq / nSamples) / scale;
if (samp_rms > 0.0) {
samp_db = 20.0 * log10(samp_rms);
}
printf("rms db = %lf \n", samp_db);
#endif // DEBUG_FILE
}
//
//
uint32_t getDecimalValueOfIPV4_String(const char* ipAddress)
{
uint8_t ipbytes[4]={};
int i =0;
int8_t j=3;
while (ipAddress+i && i<strlen(ipAddress))
{
char digit = ipAddress[i];
if (isdigit(digit) == 0 && digit!='.'){
return 0;
}
j=digit=='.'?j-1:j;
ipbytes[j]= ipbytes[j]*10 + atoi(&digit);
i++;
}
uint32_t a = ipbytes[0];
uint32_t b = ( uint32_t)ipbytes[1] << 8;
uint32_t c = ( uint32_t)ipbytes[2] << 16;
uint32_t d = ( uint32_t)ipbytes[3] << 24;
return a+b+c+d;
}
/*
*/
void configStartCmd(char* buf, int flag)
{
if (buf == NULL) { return; }
char myData[64];
bzero(myData, 64);
myData[0] = 0xef;
myData[1] = 0xfe;
myData[2] = 0x04;
myData[3] = flag; // 0x01;
bcopy(myData, buf, 64);
}
void setFilterEnables() // open collector
{
n2adr_filter_rx = 0;
if (hermes_rx_freq > 3000000) {
n2adr_filter_rx = FILTER_HPF;
}
n2adr_filter_tx = FILTER_160;
if (hermes_tx_freq > 3500000) {
n2adr_filter_tx = FILTER_80;
}
if (hermes_tx_freq > 7000000) {
n2adr_filter_tx = FILTER_40;
}
if (hermes_tx_freq > 14000000) {
n2adr_filter_tx = FILTER_30_20;
}
if (hermes_tx_freq > 21000000) {
n2adr_filter_tx = FILTER_10; // ToDo: bug
}
}
void configSendUDP_packet(unsigned char *opccBuf)
{
int i;