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hl2_tcp.c
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hl2_tcp.c
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//
// hl2_tcp.c
//
#define VERSION "v.1.4.105" // 2023-01-05 2021-04-11
// macOS : clang -lm -lpthread -Os -o hl2_tcp hl2_tcp.c hl2_tx.c
// pi : cc -lm -lpthread -Os -o hl2_tcp hl2_tcp.c hl2_tx.c
// (hl2_tx.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 2017,2020,2022 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 DEBUG_MODE_0
int discover_use_ip = 0;
#ifdef __clang__
#endif
#include <stddef.h>
float cwGain1 = 0.0;
int slices = 1;
int sliceLoop = 0;
int epcnt = 0;
int ep4cnt = 0;
extern long int random(void);;
int tx_freq ;
int dbugCnt = 0;
#define TX_OK
// #define NO_MAIN
#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; //
int hl2_sampRate = 192000; // 384000;
int hl2_sampleBits = SAMPLE_BITS;
volatile int hermes_rx_freq = 14100000; // 100k to 30M
volatile int hermes_rx2_freq = 14110000; //
volatile int hermes_rx3_freq = 14120000; //
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
int hl2_rcvSeqNum = 0;
int hl2_ep6 = 0;
// 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; // 48000 to 384000
long previousSRate = -1;
int gClientSocketID = -1;
char *ring_buffer_ptr = NULL;
int decimateFlag = 1;
int decimateCntr = 0;
volatile float gain0 = 32768.0; // 8.0 * 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 hl2_tx_on = 0; // includes hang
int tx_key_down_1 = 0; // Morse code key for hang
int tx_delay = 0; // tx/ptt hold time
int last_key_down = 0;
int tx_param_x = 0;
int tx_param_w = 0;
int tx_dot_offset = 0; // dot Tx df frequency offset
float hl2_tx_lvl = 0.0;
int hl2_tx_drive = 0;
#ifdef TX_OK
// external transmit data routines
extern void tx_setup();
extern void tx_cleanup();
extern int get_tx_key(void) ; // sets MOX bit
extern void tx_block_setup(int seqN); // prepare 2*63 samples
extern void get_tx_sample(int *tx_i, int *tx_q) ;
extern int get_tx_drive(void) ; // 0 .. 15
// extern int get_tx_offset() { return(tx_dot_offset); } // f0 df
extern void resetTxDotQueue() ;
extern int queueTxDotCommand(int k, int on, int off) ;
extern void set_tx_offset(float df);
extern void set_tx_level(float v);
extern void set_tx_drive(float d);
#else
// dummy stubs
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)
#define resetTxDotQueue() (0)
static int queueTxDotCommand(int k, int on, int off) { return 0; }
#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) {
if (argc > 2) {
hl2_ip_string = argv[2];
discover_use_ip = 1;
} else {
}
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) {
hl2_sampleBits = 16;
} else if (strcmp(argv[arg-1],"8") == 0) {
hl2_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",
hl2_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;
// circular buffer / ring buffer
// char *ring_buffer_ptr = NULL;
int ring_buffer_size = RING_BUFFER_ALLOCATION;
volatile long int ring_wr_count = 0;
volatile long int ring_wr_index = 0;
volatile long int ring_rd_index = 0;
void ring_init()
{
ring_wr_count = 0;
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; }
ring_wr_count += amount; // assume no decimate
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 ( ring_buffer_ptr == NULL ) { return(-1); }
if ( to_ptr == NULL ) { return(-1); }
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 (hl2_sampleBits == 8) { sz = 12; }
// "HL20" in 16 byte header
char header[16] = { 0x48,0x4C,0x32,0x30,
0x30,0x30,0x30+sampleRates,0x30+hl2_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();
resetTxDotQueue() ;
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 ( (hl2_sampleBits == 8)
|| (hl2_sampleBits == 16) ) {
// from set gain 0 to 400
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 = 1.50 * g2 ;
int g9 = 0.0 + roundf(g2h - 12.0);
// hermes_lna_gain : LNA gain -12 to +48 dB
if (g9 < -12) { g9 = -12; }
if (g9 > 48) { g9 = 48; }
hermes_lna_gain = g9;
fprintf(stdout, "set hl2 lna gain to : %d\n", g9);
}
#ifdef TX_OK
} else if (msg == 77) { // 0x4d tx command extension
// command added 2022-12
if (data < 256) {
tcp_tx_cmd = 3 * data; // 381 = 127 * 3
} else {
int data0 = (0xff000000L & data) >> 24;
int data1 = (0x00ff0000L & data) >> 16;
int data2 = (0x0000ff00L & data) >> 8;
int data3 = (0x000000ffL & data) ;
int k = 0;
if (data0 == 68) { // 'D'
// convert milliseconds to Tx samples
int on = 48 * data1;
int off = 48 * data2;
if (on == 0 && off == 0) {
k = 0;
queueTxDotCommand(k, on, off) ;
} else {
k = 1;
queueTxDotCommand(k, on, off) ;
}
}
if (data0 == 70) { // 'F'
// convert to Hz for f0 offset
if (data3 > 127) { data3 = data3 - 256; }
float f0 = 10 * data3;
tx_dot_offset = f0;
set_tx_offset(f0);
}
if (data0 == 76) { // 'L'
float v = 128 * data3;
hl2_tx_lvl = v;
set_tx_level(v);
#ifdef DEBUG_MODE_0
fprintf(stderr, "set tx level %f \n", v);
#endif
}
if (data0 == 66) { // 'B' drive
float d = data3;
hl2_tx_drive = d;
set_tx_drive(d);
#ifdef DEBUG_MODE_0
fprintf(stderr, "set drive %f \n", d);
#endif
}
}
// 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 hl2_adcOverload ;
int hl2_txfifoLevel ;
int firmwareVersion ;
double slice2Pwr = 0.0;
int hl2_clip8_flag = 0;
float hl2_tx_hang = 0.2; // seconds
int hl2_tx_mode = 0;
int last_t1 = -1;
int handleRcvData(unsigned char *hl2Buf, int n)
{
unsigned char *buf = hl2Buf;
int j, jj;
int rcvSeqNum;
double samp_m2 = 0.0;
unsigned char uv[1024];
hl2_clip8_flag = 0;
// gain scaling adjustments
// 012345670123456701234567 HPDSR 24 bits
// ============ ADC 12 bits
// ---------------- TCP 16 bits
// -------- TCP 8 bits
float g8_r = 1.0 / 65536.0; // shift down 16 bits
float g16_r = 1.0 / 4096.0; // shift down 12 bits
int headerOK = ( (buf[ 0] == 0xEF)
&& (buf[ 1] == 0xFE)
&& (buf[ 2] == 0x01) );
int ep = buf[ 3] ;
if (ep != 6) {
printf("******** ep error \n" );
return(0);
}
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]);
if (rcvSeqNum != (hl2_rcvSeqNum + 1)) {
hl2_ep6 += 1;
// printf("err %d + 1 != %d \n", hl2_rcvSeqNum , rcvSeqNum);
}
hl2_rcvSeqNum = rcvSeqNum;
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 ?
// 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 == 0) {
int jj = 0;
int kk = 11+jj;
hl2_txfifoLevel = ( (buf[kk+1] << 24)
| (buf[kk+2] << 16)
| (buf[kk+3] << 8)
| (buf[kk+4] ) );
hl2_adcOverload = buf[11+jj+1] ;
// hl2_txfifoLevel = buf[11+jj+3] ;
firmwareVersion = buf[11+jj+4] ;
}
if (dtype1 == 0) {
int jj = 512;
int kk = 11+jj;
hl2_txfifoLevel = ( (buf[kk+1] << 24)
| (buf[kk+2] << 16)
| (buf[kk+3] << 8)
| (buf[kk+4] ) );
hl2_adcOverload = buf[11+jj+1] ;
// hl2_txfifoLevel = buf[11+jj+3] ;
firmwareVersion = buf[11+jj+4] ;
}
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;
}
// 1 slice 8..15 step by 8
// <I2><I1><I0><Q2><Q1><Q0><M1><M0>
// 2 slices 8..21 step by 14
// <I12><I11><I10><Q12><Q11><Q10><I22><I21><I20><Q22><Q21><Q20><M1><M0>
int sfc = 8;
if (slices == 2) { sfc = 14; }
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 imagp1, realp1;
double u1,v1;
// reversed order IQ
imagp1 = buf[j ] << 24 | buf[j + 1] << 16 | buf[j + 2] << 8;
realp1 = buf[j + 3] << 24 | buf[j + 4] << 16 | buf[j + 5] << 8;
v1 = realp1;
u1 = imagp1;
if (slices == 2) {
int imagp2, realp2;
double u2,v2;
// reversed order IQ
imagp2 = buf[j+6] << 24 | buf[j+7 ] << 16 | buf[j+8 ] << 8;
realp2 = buf[j+9] << 24 | buf[j+10] << 16 | buf[j+11] << 8;
// sddddddd ddddx000 00000000
// 00000000 ssssdddd dddddddx
/// ToDo: // currently 2nd slice data is unused
}
// transmitter duplex gain reductions
if (hl2_tx_on > 0) {
if (hl2_tx_mode == 55) { // ssb
v1 *= 10.0;
u1 *= 10.0;
}
if (hl2_tx_lvl > 255) { // relative to Tx power
v1 /= (hl2_tx_lvl + 1.0) / 256.0; // ???
u1 /= (hl2_tx_lvl + 1.0) / 256.0;
}
}
if (hl2_sampleBits == 16) { // for HERMES !!!
float v2 = g16_r * v1;
float u2 = g16_r * u1;
int vv = (int)roundf(v2);
int uu = (int)roundf(u2);
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 += u1*u1 + v1*v1;
// scale and add triangular noise shaping (dither)
float vv = g8_r * v1;
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_r * u1;
float rnd1u = rand_float_co();
float ru = rnd1u - rnd0u;
uu = uu + ru;
float ruu = roundf(uu);
int ui = (int)ruu;
rnd0u = rnd1u;
if (vi > 127) { vi = 127; hl2_clip8_flag++; }
if (vi < -128) { vi = -128; hl2_clip8_flag++; }
if (ui > 127) { vi = 127; hl2_clip8_flag++; }
if (ui < -128) { vi = -128; hl2_clip8_flag++; }
// 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;