506 lines
12 KiB
C++
506 lines
12 KiB
C++
/*
|
|
* Copyright (C) 2018,2019,2020 Jonathan Naylor, G4KLX
|
|
*
|
|
* 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; version 2 of the License.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include "POCSAGControl.h"
|
|
#include "Utils.h"
|
|
#include "Log.h"
|
|
|
|
#include <cstdio>
|
|
#include <cassert>
|
|
#include <cstring>
|
|
#include <ctime>
|
|
|
|
// #define DUMP_POCSAG
|
|
|
|
const struct BCD {
|
|
char m_c;
|
|
uint32_t m_bcd[5U];
|
|
} BCD_VALUES[] = {
|
|
{ '0', {0x00000000U, 0x00000000U, 0x00000000U, 0x00000000U, 0x00000000U}},
|
|
{ '1', {0x40000000U, 0x04000000U, 0x00400000U, 0x00040000U, 0x00004000U}},
|
|
{ '2', {0x20000000U, 0x02000000U, 0x00200000U, 0x00020000U, 0x00002000U}},
|
|
{ '3', {0x60000000U, 0x06000000U, 0x00600000U, 0x00060000U, 0x00006000U}},
|
|
{ '4', {0x10000000U, 0x01000000U, 0x00100000U, 0x00010000U, 0x00001000U}},
|
|
{ '5', {0x50000000U, 0x05000000U, 0x00500000U, 0x00050000U, 0x00005000U}},
|
|
{ '6', {0x30000000U, 0x03000000U, 0x00300000U, 0x00030000U, 0x00003000U}},
|
|
{ '7', {0x70000000U, 0x07000000U, 0x00700000U, 0x00070000U, 0x00007000U}},
|
|
{ '8', {0x08000000U, 0x00800000U, 0x00080000U, 0x00008000U, 0x00000800U}},
|
|
{ '9', {0x48000000U, 0x04800000U, 0x00480000U, 0x00048000U, 0x00004800U}},
|
|
{ 'U', {0x68000000U, 0x06800000U, 0x00680000U, 0x00068000U, 0x00006800U}},
|
|
{ ' ', {0x18000000U, 0x01800000U, 0x00180000U, 0x00018000U, 0x00001800U}},
|
|
{ '-', {0x58000000U, 0x05800000U, 0x00580000U, 0x00058000U, 0x00005800U}},
|
|
{ ')', {0x38000000U, 0x03800000U, 0x00380000U, 0x00038000U, 0x00003800U}},
|
|
{ '(', {0x78000000U, 0x07800000U, 0x00780000U, 0x00078000U, 0x00007800U}},
|
|
{ 0, {0x00000000U, 0x00000000U, 0x00000000U, 0x00000000U, 0x00000000U}}
|
|
};
|
|
|
|
const uint32_t BCD_SPACES[] = {0x19999800U, 0x01999800U, 0x00199800U, 0x00019800U, 0x00001800U};
|
|
|
|
const uint32_t DATA_MASK[] = { 0x40000000U, 0x20000000U, 0x10000000U,
|
|
0x08000000U, 0x04000000U, 0x02000000U, 0x01000000U,
|
|
0x00800000U, 0x00400000U, 0x00200000U, 0x00100000U,
|
|
0x00080000U, 0x00040000U, 0x00020000U, 0x00010000U,
|
|
0x00008000U, 0x00004000U, 0x00002000U, 0x00001000U,
|
|
0x00000800U};
|
|
|
|
const unsigned char FUNCTIONAL_NUMERIC = 0U;
|
|
const unsigned char FUNCTIONAL_ALERT1 = 1U;
|
|
const unsigned char FUNCTIONAL_ALERT2 = 2U;
|
|
const unsigned char FUNCTIONAL_ALPHANUMERIC = 3U;
|
|
|
|
CPOCSAGControl::CPOCSAGControl(CPOCSAGNetwork* network, CDisplay* display) :
|
|
m_network(network),
|
|
m_display(display),
|
|
m_queue(5000U, "POCSAG Control"),
|
|
m_frames(0U),
|
|
m_count(0U),
|
|
m_output(),
|
|
m_buffer(),
|
|
m_ric(0U),
|
|
m_data(),
|
|
m_state(PS_NONE),
|
|
m_enabled(true),
|
|
m_fp(NULL)
|
|
{
|
|
assert(display != NULL);
|
|
}
|
|
|
|
CPOCSAGControl::~CPOCSAGControl()
|
|
{
|
|
m_output.clear();
|
|
m_buffer.clear();
|
|
|
|
for (std::deque<POCSAGData*>::iterator it = m_data.begin(); it != m_data.end(); ++it)
|
|
delete *it;
|
|
m_data.clear();
|
|
}
|
|
|
|
unsigned int CPOCSAGControl::readModem(unsigned char* data)
|
|
{
|
|
assert(data != NULL);
|
|
|
|
if (m_queue.isEmpty())
|
|
return 0U;
|
|
|
|
unsigned char len = 0U;
|
|
m_queue.getData(&len, 1U);
|
|
|
|
m_queue.getData(data, len);
|
|
|
|
return len;
|
|
}
|
|
|
|
void CPOCSAGControl::sendPage(unsigned int ric, const std::string& text)
|
|
{
|
|
if (!m_enabled)
|
|
return;
|
|
|
|
POCSAGData* output = new POCSAGData;
|
|
|
|
output->m_ric = ric;
|
|
output->m_text = text;
|
|
|
|
addAddress(FUNCTIONAL_ALPHANUMERIC, ric, output->m_buffer);
|
|
|
|
LogDebug("Local message to %07u, func Alphanumeric: \"%s\"", ric, text.c_str());
|
|
|
|
packASCII(text, output->m_buffer);
|
|
|
|
// Ensure data is an even number of words
|
|
if ((output->m_buffer.size() % 2U) == 1U)
|
|
output->m_buffer.push_back(POCSAG_IDLE_WORD);
|
|
|
|
m_data.push_back(output);
|
|
}
|
|
|
|
bool CPOCSAGControl::readNetwork()
|
|
{
|
|
if (m_network == NULL)
|
|
return true;
|
|
|
|
unsigned char data[300U];
|
|
unsigned int length = m_network->read(data);
|
|
if (length == 0U)
|
|
return true;
|
|
|
|
if (!m_enabled)
|
|
return false;
|
|
|
|
POCSAGData* output = new POCSAGData;
|
|
|
|
output->m_ric = 0U;
|
|
output->m_ric |= (data[0U] << 16) & 0x00FF0000U;
|
|
output->m_ric |= (data[1U] << 8) & 0x0000FF00U;
|
|
output->m_ric |= (data[2U] << 0) & 0x000000FFU;
|
|
|
|
unsigned char functional = data[3U];
|
|
|
|
addAddress(functional, output->m_ric, output->m_buffer);
|
|
|
|
switch (functional) {
|
|
case FUNCTIONAL_ALPHANUMERIC:
|
|
output->m_text = std::string((char*)(data + 4U), length - 4U);
|
|
switch (output->m_ric) {
|
|
case 4512U:
|
|
decodeROT1(output->m_text, 3U, output->m_display);
|
|
LogDebug("Message to %07u, func Alphanumeric: (%u) \"%s\"", output->m_ric, output->m_text.at(1U) - 0x1FU, output->m_display.c_str());
|
|
break;
|
|
case 4520U:
|
|
decodeROT1(output->m_text, 2U, output->m_display);
|
|
LogDebug("Message to %07u, func Alphanumeric: (%u-%u) \"%s\"", output->m_ric, output->m_text.at(0U) - 0x1FU, output->m_text.at(1U) - 0x20U, output->m_display.c_str());
|
|
break;
|
|
default:
|
|
output->m_display = output->m_text;
|
|
LogDebug("Message to %07u, func Alphanumeric: \"%s\"", output->m_ric, output->m_display.c_str());
|
|
break;
|
|
}
|
|
packASCII(output->m_text, output->m_buffer);
|
|
break;
|
|
case FUNCTIONAL_NUMERIC:
|
|
output->m_text = std::string((char*)(data + 4U), length - 4U);
|
|
output->m_display = output->m_text;
|
|
LogDebug("Message to %07u, func Numeric: \"%s\"", output->m_ric, output->m_display.c_str());
|
|
packNumeric(output->m_text, output->m_buffer);
|
|
break;
|
|
case FUNCTIONAL_ALERT1:
|
|
LogDebug("Message to %07u, func Alert 1", output->m_ric);
|
|
break;
|
|
case FUNCTIONAL_ALERT2:
|
|
output->m_text = std::string((char*)(data + 4U), length - 4U);
|
|
output->m_display = output->m_text;
|
|
LogDebug("Message to %07u, func Alert 2: \"%s\"", output->m_ric, output->m_display.c_str());
|
|
packASCII(output->m_text, output->m_buffer);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// Ensure data is an even number of words
|
|
if ((output->m_buffer.size() % 2U) == 1U)
|
|
output->m_buffer.push_back(POCSAG_IDLE_WORD);
|
|
|
|
m_data.push_back(output);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CPOCSAGControl::processData()
|
|
{
|
|
if (m_data.empty())
|
|
return false;
|
|
|
|
POCSAGData* output = m_data.front();
|
|
m_data.pop_front();
|
|
|
|
m_display->writePOCSAG(output->m_ric, output->m_display);
|
|
|
|
m_buffer = output->m_buffer;
|
|
m_ric = output->m_ric;
|
|
|
|
delete output;
|
|
|
|
return true;
|
|
}
|
|
|
|
void CPOCSAGControl::clock(unsigned int ms)
|
|
{
|
|
if (m_state == PS_NONE) {
|
|
bool ret = readNetwork();
|
|
if (!ret)
|
|
return;
|
|
|
|
ret = processData();
|
|
if (!ret)
|
|
return;
|
|
|
|
m_state = PS_WAITING;
|
|
m_frames = 0U;
|
|
m_count = 1U;
|
|
|
|
#if defined(DUMP_POCSAG)
|
|
openFile();
|
|
#endif
|
|
}
|
|
|
|
m_output.clear();
|
|
m_output.push_back(POCSAG_SYNC_WORD);
|
|
|
|
for (unsigned int i = 0U; i < POCSAG_FRAME_ADDRESSES; i++) {
|
|
if (m_state == PS_WAITING) {
|
|
if (i == (m_ric % POCSAG_FRAME_ADDRESSES)) {
|
|
uint32_t w1 = m_buffer.front();
|
|
m_buffer.pop_front();
|
|
uint32_t w2 = m_buffer.front();
|
|
m_buffer.pop_front();
|
|
|
|
m_output.push_back(w1);
|
|
m_output.push_back(w2);
|
|
|
|
m_state = PS_SENDING;
|
|
} else {
|
|
m_output.push_back(POCSAG_IDLE_WORD);
|
|
m_output.push_back(POCSAG_IDLE_WORD);
|
|
}
|
|
} else if (m_state == PS_SENDING) {
|
|
if (m_buffer.empty()) {
|
|
m_output.push_back(POCSAG_IDLE_WORD);
|
|
m_output.push_back(POCSAG_IDLE_WORD);
|
|
|
|
bool ret = processData();
|
|
if (ret) {
|
|
m_state = PS_WAITING;
|
|
m_count++;
|
|
} else {
|
|
m_state = PS_ENDING;
|
|
}
|
|
} else {
|
|
uint32_t w1 = m_buffer.front();
|
|
m_buffer.pop_front();
|
|
uint32_t w2 = m_buffer.front();
|
|
m_buffer.pop_front();
|
|
|
|
m_output.push_back(w1);
|
|
m_output.push_back(w2);
|
|
}
|
|
} else { // PS_ENDING
|
|
m_output.push_back(POCSAG_IDLE_WORD);
|
|
m_output.push_back(POCSAG_IDLE_WORD);
|
|
}
|
|
}
|
|
|
|
writeQueue();
|
|
m_frames++;
|
|
|
|
if (m_state == PS_ENDING) {
|
|
LogMessage("POCSAG, transmitted %u frame(s) of data from %u message(s)", m_frames, m_count);
|
|
m_display->clearPOCSAG();
|
|
m_state = PS_NONE;
|
|
|
|
#if defined(DUMP_POCSAG)
|
|
closeFile();
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void CPOCSAGControl::addAddress(unsigned char functional, unsigned int ric, std::deque<uint32_t>& buffer) const
|
|
{
|
|
uint32_t word = 0x00000000U;
|
|
|
|
switch (functional) {
|
|
case FUNCTIONAL_ALPHANUMERIC:
|
|
word = 0x00001800U;
|
|
break;
|
|
case FUNCTIONAL_ALERT1:
|
|
word = 0x00000800U;
|
|
break;
|
|
case FUNCTIONAL_ALERT2:
|
|
word = 0x00001000U;
|
|
break;
|
|
case FUNCTIONAL_NUMERIC:
|
|
default:
|
|
break;
|
|
}
|
|
|
|
word |= (ric / POCSAG_FRAME_ADDRESSES) << 13;
|
|
|
|
addBCHAndParity(word);
|
|
|
|
buffer.push_back(word);
|
|
}
|
|
|
|
void CPOCSAGControl::packASCII(const std::string& text, std::deque<uint32_t>& buffer) const
|
|
{
|
|
const unsigned char MASK = 0x01U;
|
|
|
|
uint32_t word = 0x80000000U;
|
|
unsigned int n = 0U;
|
|
|
|
for (std::string::const_iterator it = text.cbegin(); it != text.cend(); ++it) {
|
|
unsigned char c = *it;
|
|
for (unsigned int j = 0U; j < 7U; j++, c >>= 1) {
|
|
bool b = (c & MASK) == MASK;
|
|
if (b)
|
|
word |= DATA_MASK[n];
|
|
n++;
|
|
|
|
if (n == 20U) {
|
|
addBCHAndParity(word);
|
|
buffer.push_back(word);
|
|
word = 0x80000000U;
|
|
n = 0U;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (n > 0U) {
|
|
addBCHAndParity(word);
|
|
buffer.push_back(word);
|
|
}
|
|
}
|
|
|
|
void CPOCSAGControl::packNumeric(const std::string& text, std::deque<uint32_t>& buffer) const
|
|
{
|
|
uint32_t word = 0x80000000U;
|
|
unsigned int n = 0U;
|
|
|
|
for (std::string::const_iterator it = text.cbegin(); it != text.cend(); ++it) {
|
|
char c = *it;
|
|
|
|
const BCD* bcd = NULL;
|
|
for (unsigned int i = 0U; BCD_VALUES[i].m_c != 0; i++) {
|
|
if (BCD_VALUES[i].m_c == c) {
|
|
bcd = BCD_VALUES + i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (bcd != NULL) {
|
|
word |= bcd->m_bcd[n];
|
|
n++;
|
|
|
|
if (n == 5U) {
|
|
addBCHAndParity(word);
|
|
buffer.push_back(word);
|
|
word = 0x80000000U;
|
|
n = 0U;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Pack the remainder of the word with BCD spaces.
|
|
if (n != 0U) {
|
|
word |= BCD_SPACES[n];
|
|
|
|
addBCHAndParity(word);
|
|
buffer.push_back(word);
|
|
}
|
|
}
|
|
|
|
void CPOCSAGControl::addBCHAndParity(uint32_t& word) const
|
|
{
|
|
uint32_t temp = word;
|
|
|
|
for (unsigned int i = 0U; i < 21U; i++, temp <<= 1) {
|
|
if (temp & 0x80000000U)
|
|
temp ^= 0xED200000U;
|
|
}
|
|
|
|
word |= (temp >> 21);
|
|
|
|
temp = word;
|
|
|
|
unsigned int parity = 0U;
|
|
for (unsigned int i = 0U; i < 32U; i++, temp <<= 1) {
|
|
if (temp & 0x80000000U)
|
|
parity++;
|
|
}
|
|
|
|
if ((parity % 2U) == 1U)
|
|
word |= 0x00000001U;
|
|
}
|
|
|
|
void CPOCSAGControl::writeQueue()
|
|
{
|
|
// Convert 32-bit words to bytes
|
|
unsigned char data[POCSAG_FRAME_LENGTH_BYTES];
|
|
unsigned char len = 0U;
|
|
for (std::deque<uint32_t>::const_iterator it = m_output.cbegin(); it != m_output.cend(); ++it) {
|
|
uint32_t word = *it;
|
|
|
|
data[len++] = word >> 24;
|
|
data[len++] = word >> 16;
|
|
data[len++] = word >> 8;
|
|
data[len++] = word >> 0;
|
|
}
|
|
|
|
m_output.clear();
|
|
|
|
#if defined(DUMP_POCSAG)
|
|
writeFile(data);
|
|
#endif
|
|
|
|
CUtils::dump(1U, "Data to MMDVM", data, len);
|
|
|
|
assert(len == POCSAG_FRAME_LENGTH_BYTES);
|
|
|
|
unsigned int space = m_queue.freeSpace();
|
|
if (space < (len + 1U)) {
|
|
LogError("POCSAG, overflow in the POCSAG RF queue");
|
|
return;
|
|
}
|
|
|
|
m_queue.addData(&len, 1U);
|
|
m_queue.addData(data, len);
|
|
}
|
|
|
|
bool CPOCSAGControl::openFile()
|
|
{
|
|
if (m_fp != NULL)
|
|
return true;
|
|
|
|
time_t t;
|
|
::time(&t);
|
|
|
|
struct tm* tm = ::localtime(&t);
|
|
|
|
char name[100U];
|
|
::sprintf(name, "POCSAG_%04d%02d%02d_%02d%02d%02d.dat", tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
|
|
|
|
m_fp = ::fopen(name, "wb");
|
|
if (m_fp == NULL)
|
|
return false;
|
|
|
|
::fwrite("POCSAG", 1U, 6U, m_fp);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CPOCSAGControl::writeFile(const unsigned char* data)
|
|
{
|
|
if (m_fp == NULL)
|
|
return false;
|
|
|
|
::fwrite(data, 1U, POCSAG_FRAME_LENGTH_BYTES, m_fp);
|
|
|
|
return true;
|
|
}
|
|
|
|
void CPOCSAGControl::closeFile()
|
|
{
|
|
if (m_fp != NULL) {
|
|
::fclose(m_fp);
|
|
m_fp = NULL;
|
|
}
|
|
}
|
|
|
|
void CPOCSAGControl::enable(bool enabled)
|
|
{
|
|
if (!enabled && m_enabled) {
|
|
m_queue.clear();
|
|
m_output.clear();
|
|
|
|
for (std::deque<POCSAGData*>::iterator it = m_data.begin(); it != m_data.end(); ++it)
|
|
delete *it;
|
|
m_data.clear();
|
|
|
|
m_state = PS_NONE;
|
|
}
|
|
|
|
m_enabled = enabled;
|
|
}
|
|
|
|
void CPOCSAGControl::decodeROT1(const std::string& in, unsigned int start, std::string& out) const
|
|
{
|
|
for (size_t i = start; i < in.length(); i++)
|
|
out += in.at(i) - 1U;
|
|
}
|