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Add interpretation of D-Star slow data text.

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This commit is contained in:
Jonathan Naylor
2023-06-16 11:35:16 +01:00
parent 7b836c26e2
commit af21cef54d
4 changed files with 118 additions and 22 deletions
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93
DStarSlowData.cpp
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@@ -1,5 +1,5 @@
/*
* Copyright (C) 2016 by Jonathan Naylor G4KLX
* Copyright (C) 2016,2023 by 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
@@ -18,6 +18,7 @@
#include "DStarSlowData.h"
#include "DStarDefines.h"
#include "Utils.h"
#include "CRC.h"
#include "Log.h"
@@ -31,6 +32,7 @@ m_ptr(0U),
m_buffer(NULL),
m_text(NULL),
m_textPtr(0U),
m_textBits(0x00U),
m_state(SDD_FIRST)
{
m_header = new unsigned char[50U]; // DSTAR_HEADER_LENGTH_BYTES
@@ -45,7 +47,7 @@ CDStarSlowData::~CDStarSlowData()
delete[] m_text;
}
CDStarHeader* CDStarSlowData::add(const unsigned char* data)
CDStarHeader* CDStarSlowData::addHeader(const unsigned char* data)
{
assert(data != NULL);
@@ -93,18 +95,92 @@ CDStarHeader* CDStarSlowData::add(const unsigned char* data)
return new CDStarHeader(m_header);
}
const unsigned char* CDStarSlowData::addText(const unsigned char* data)
{
assert(data != NULL);
switch (m_state) {
case SDD_FIRST:
m_buffer[0U] = data[9U] ^ DSTAR_SCRAMBLER_BYTES[0U];
m_buffer[1U] = data[10U] ^ DSTAR_SCRAMBLER_BYTES[1U];
m_buffer[2U] = data[11U] ^ DSTAR_SCRAMBLER_BYTES[2U];
m_state = SDD_SECOND;
return NULL;
case SDD_SECOND:
m_buffer[3U] = data[9U] ^ DSTAR_SCRAMBLER_BYTES[0U];
m_buffer[4U] = data[10U] ^ DSTAR_SCRAMBLER_BYTES[1U];
m_buffer[5U] = data[11U] ^ DSTAR_SCRAMBLER_BYTES[2U];
m_state = SDD_FIRST;
break;
}
switch (m_buffer[0U]) {
case DSTAR_SLOW_DATA_TYPE_TEXT | 0U:
CUtils::dump(1U, "D-Star slow data text fragment", m_buffer, 6U);
m_text[0U] = m_buffer[1U] & 0x7FU;
m_text[1U] = m_buffer[2U] & 0x7FU;
m_text[2U] = m_buffer[3U] & 0x7FU;
m_text[3U] = m_buffer[4U] & 0x7FU;
m_text[4U] = m_buffer[5U] & 0x7FU;
m_textBits |= 0x01U;
break;
case DSTAR_SLOW_DATA_TYPE_TEXT | 1U:
CUtils::dump(1U, "D-Star slow data text fragment", m_buffer, 6U);
m_text[5U] = m_buffer[1U] & 0x7FU;
m_text[6U] = m_buffer[2U] & 0x7FU;
m_text[7U] = m_buffer[3U] & 0x7FU;
m_text[8U] = m_buffer[4U] & 0x7FU;
m_text[9U] = m_buffer[5U] & 0x7FU;
m_textBits |= 0x02U;
break;
case DSTAR_SLOW_DATA_TYPE_TEXT | 2U:
CUtils::dump(1U, "D-Star slow data text fragment", m_buffer, 6U);
m_text[10U] = m_buffer[1U] & 0x7FU;
m_text[11U] = m_buffer[2U] & 0x7FU;
m_text[12U] = m_buffer[3U] & 0x7FU;
m_text[13U] = m_buffer[4U] & 0x7FU;
m_text[14U] = m_buffer[5U] & 0x7FU;
m_textBits |= 0x04U;
break;
case DSTAR_SLOW_DATA_TYPE_TEXT | 3U:
CUtils::dump(1U, "D-Star slow data text fragment", m_buffer, 6U);
m_text[15U] = m_buffer[1U] & 0x7FU;
m_text[16U] = m_buffer[2U] & 0x7FU;
m_text[17U] = m_buffer[3U] & 0x7FU;
m_text[18U] = m_buffer[4U] & 0x7FU;
m_text[19U] = m_buffer[5U] & 0x7FU;
m_text[20U] = 0x00U;
m_textBits |= 0x08U;
break;
default:
return NULL;
}
if (m_textBits != 0x0FU)
return NULL;
CUtils::dump(1U, "D-STar slow data text", m_text, 20U);
m_textBits = 0x00U;
return m_text;
}
void CDStarSlowData::start()
{
::memset(m_header, 0x00U, DSTAR_HEADER_LENGTH_BYTES);
m_ptr = 0U;
m_state = SDD_FIRST;
m_ptr = 0U;
m_state = SDD_FIRST;
m_textBits = 0x00U;
}
void CDStarSlowData::reset()
{
m_ptr = 0U;
m_state = SDD_FIRST;
m_ptr = 0U;
m_state = SDD_FIRST;
m_textBits = 0x00U;
}
void CDStarSlowData::setText(const char* text)
@@ -139,10 +215,11 @@ void CDStarSlowData::setText(const char* text)
m_text[22U] = text[18U];
m_text[23U] = text[19U];
m_textPtr = 0U;
m_textPtr = 0U;
m_textBits = 0x00U;
}
void CDStarSlowData::get(unsigned char* data)
void CDStarSlowData::getSlowData(unsigned char* data)
{
assert(data != NULL);