Add new processing blocks for CSBK and Data Headers.

2025-12-22 06:05:36 +08:00 · 2017-08-01 21:55:47 +01:00
parent 367116bdf4
commit cd19de377e
7 changed files with 371 additions and 3 deletions
--- a/DMRCSBK.cpp
+++ b/DMRCSBK.cpp
@@ -0,0 +1,134 @@
+/*
+ *   Copyright (C) 2015,2016,2017 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
+ *   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, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "DMRCSBK.h"
+#include "BPTC19696.h"
+#include "Utils.h"
+#include "CRC.h"
+
+#include <cstdio>
+#include <cassert>
+
+CDMRCSBK::CDMRCSBK() :
+m_data(NULL),
+m_CSBKO(CSBKO_NONE)
+{
+	m_data = new unsigned char[12U];
+}
+
+CDMRCSBK::~CDMRCSBK()
+{
+	delete[] m_data;
+}
+
+bool CDMRCSBK::put(const unsigned char* bytes)
+{
+	assert(bytes != NULL);
+
+	CBPTC19696 bptc;
+	bptc.decode(bytes, m_data);
+
+	m_data[10U] ^= CSBK_CRC_MASK[0U];
+	m_data[11U] ^= CSBK_CRC_MASK[1U];
+
+	bool valid = CCRC::checkCCITT162(m_data, 12U);
+	if (!valid)
+		return false;
+
+	m_CSBKO = CSBKO(m_data[0U] & 0x3FU);
+
+	return true;
+}
+
+void CDMRCSBK::get(unsigned char* bytes) const
+{
+	assert(bytes != NULL);
+
+	CCRC::addCCITT162(m_data, 12U);
+	
+	m_data[10U] ^= CSBK_CRC_MASK[0U];
+	m_data[11U] ^= CSBK_CRC_MASK[1U];
+
+	CBPTC19696 bptc;
+	bptc.encode(m_data, bytes);
+}
+
+CSBKO CDMRCSBK::getCSBKO() const
+{
+	return m_CSBKO;
+}
+
+bool CDMRCSBK::getGI() const
+{
+	if (m_CSBKO == CSBKO_PRECCSBK)
+		return (m_data[2U] & 0x40U) == 0x40U;
+	else
+		return false;
+}
+
+unsigned int CDMRCSBK::getSrcId() const
+{
+	if (m_CSBKO == CSBKO_NACKRSP)
+		return m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U];		
+	else
+		return m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U];
+}
+
+unsigned int CDMRCSBK::getDstId() const
+{
+	if (m_CSBKO == CSBKO_NACKRSP)
+		return m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U];
+	else
+		return m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U];		
+}
+
+void CDMRCSBK::setGI(bool group)
+{
+	if (m_CSBKO == CSBKO_PRECCSBK) {
+		if (group)
+			m_data[2U] |= 0x40U;
+		else
+			m_data[2U] &= ~0x40U;
+	}
+}
+
+void CDMRCSBK::setSrcId(unsigned int id)
+{
+	if (m_CSBKO == CSBKO_NACKRSP) {
+		m_data[4U] = id >> 16;
+		m_data[5U] = id >> 8;
+		m_data[6U] = id >> 0;
+	} else {
+		m_data[7U] = id >> 16;
+		m_data[8U] = id >> 8;
+		m_data[9U] = id >> 0;
+	}
+}
+
+void CDMRCSBK::setDstId(unsigned int id)
+{
+	if (m_CSBKO == CSBKO_NACKRSP) {
+		m_data[7U] = id >> 16;
+		m_data[8U] = id >> 8;
+		m_data[9U] = id >> 0;
+	} else {
+		m_data[4U] = id >> 16;
+		m_data[5U] = id >> 8;
+		m_data[6U] = id >> 0;
+	}
+}