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Modem.cpp
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/*
* Copyright (C) 2011-2018 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 "DStarDefines.h"
#include "DMRDefines.h"
#include "YSFDefines.h"
#include "P25Defines.h"
#include "NXDNDefines.h"
#include "POCSAGDefines.h"
#include "Thread.h"
#include "Modem.h"
#include "Utils.h"
#include "Log.h"
#include <cmath>
#include <cstdio>
#include <cassert>
#include <cstdint>
#include <ctime>
#if defined(_WIN32) || defined(_WIN64)
#include <Windows.h>
#else
#include <unistd.h>
#endif
const unsigned char MMDVM_FRAME_START = 0xE0U;
const unsigned char MMDVM_GET_VERSION = 0x00U;
const unsigned char MMDVM_GET_STATUS = 0x01U;
const unsigned char MMDVM_SET_CONFIG = 0x02U;
const unsigned char MMDVM_SET_MODE = 0x03U;
const unsigned char MMDVM_SET_FREQ = 0x04U;
const unsigned char MMDVM_SEND_CWID = 0x0AU;
const unsigned char MMDVM_DSTAR_HEADER = 0x10U;
const unsigned char MMDVM_DSTAR_DATA = 0x11U;
const unsigned char MMDVM_DSTAR_LOST = 0x12U;
const unsigned char MMDVM_DSTAR_EOT = 0x13U;
const unsigned char MMDVM_DMR_DATA1 = 0x18U;
const unsigned char MMDVM_DMR_LOST1 = 0x19U;
const unsigned char MMDVM_DMR_DATA2 = 0x1AU;
const unsigned char MMDVM_DMR_LOST2 = 0x1BU;
const unsigned char MMDVM_DMR_SHORTLC = 0x1CU;
const unsigned char MMDVM_DMR_START = 0x1DU;
const unsigned char MMDVM_DMR_ABORT = 0x1EU;
const unsigned char MMDVM_YSF_DATA = 0x20U;
const unsigned char MMDVM_YSF_LOST = 0x21U;
const unsigned char MMDVM_P25_HDR = 0x30U;
const unsigned char MMDVM_P25_LDU = 0x31U;
const unsigned char MMDVM_P25_LOST = 0x32U;
const unsigned char MMDVM_NXDN_DATA = 0x40U;
const unsigned char MMDVM_NXDN_LOST = 0x41U;
const unsigned char MMDVM_POCSAG_DATA = 0x50U;
const unsigned char MMDVM_ACK = 0x70U;
const unsigned char MMDVM_NAK = 0x7FU;
const unsigned char MMDVM_SERIAL = 0x80U;
const unsigned char MMDVM_TRANSPARENT = 0x90U;
const unsigned char MMDVM_DEBUG1 = 0xF1U;
const unsigned char MMDVM_DEBUG2 = 0xF2U;
const unsigned char MMDVM_DEBUG3 = 0xF3U;
const unsigned char MMDVM_DEBUG4 = 0xF4U;
const unsigned char MMDVM_DEBUG5 = 0xF5U;
const unsigned int MAX_RESPONSES = 30U;
const unsigned int BUFFER_LENGTH = 2000U;
CModem::CModem(const std::string& port, bool duplex, bool rxInvert, bool txInvert, bool pttInvert, unsigned int txDelay, unsigned int dmrDelay, bool trace, bool debug) :
m_port(port),
m_dmrColorCode(0U),
m_ysfLoDev(false),
m_ysfTXHang(4U),
m_duplex(duplex),
m_rxInvert(rxInvert),
m_txInvert(txInvert),
m_pttInvert(pttInvert),
m_txDelay(txDelay),
m_dmrDelay(dmrDelay),
m_rxLevel(0U),
m_cwIdTXLevel(0U),
m_dstarTXLevel(0U),
m_dmrTXLevel(0U),
m_ysfTXLevel(0U),
m_p25TXLevel(0U),
m_nxdnTXLevel(0U),
m_pocsagTXLevel(0U),
m_trace(trace),
m_debug(debug),
m_rxFrequency(0U),
m_txFrequency(0U),
m_pocsagFrequency(0U),
m_dstarEnabled(false),
m_dmrEnabled(false),
m_ysfEnabled(false),
m_p25Enabled(false),
m_nxdnEnabled(false),
m_pocsagEnabled(false),
m_rxDCOffset(0),
m_txDCOffset(0),
m_serial(port, SERIAL_115200, true),
m_buffer(NULL),
m_length(0U),
m_offset(0U),
m_rxDStarData(1000U, "Modem RX D-Star"),
m_txDStarData(1000U, "Modem TX D-Star"),
m_rxDMRData1(1000U, "Modem RX DMR1"),
m_rxDMRData2(1000U, "Modem RX DMR2"),
m_txDMRData1(1000U, "Modem TX DMR1"),
m_txDMRData2(1000U, "Modem TX DMR2"),
m_rxYSFData(1000U, "Modem RX YSF"),
m_txYSFData(1000U, "Modem TX YSF"),
m_rxP25Data(1000U, "Modem RX P25"),
m_txP25Data(1000U, "Modem TX P25"),
m_rxNXDNData(1000U, "Modem RX NXDN"),
m_txNXDNData(1000U, "Modem TX NXDN"),
m_txPOCSAGData(1000U, "Modem TX POCSAG"),
m_rxTransparentData(1000U, "Modem RX Transparent"),
m_txTransparentData(1000U, "Modem TX Transparent"),
m_statusTimer(1000U, 0U, 250U),
m_inactivityTimer(1000U, 2U),
m_playoutTimer(1000U, 0U, 10U),
m_dstarSpace(0U),
m_dmrSpace1(0U),
m_dmrSpace2(0U),
m_ysfSpace(0U),
m_p25Space(0U),
m_nxdnSpace(0U),
m_pocsagSpace(0U),
m_tx(false),
m_cd(false),
m_lockout(false),
m_error(false),
m_hwType(HWT_UNKNOWN)
{
assert(!port.empty());
m_buffer = new unsigned char[BUFFER_LENGTH];
}
CModem::~CModem()
{
delete[] m_buffer;
}
void CModem::setRFParams(unsigned int rxFrequency, int rxOffset, unsigned int txFrequency, int txOffset, int txDCOffset, int rxDCOffset, float rfLevel, unsigned int pocsagFrequency)
{
m_rxFrequency = rxFrequency + rxOffset;
m_txFrequency = txFrequency + txOffset;
m_txDCOffset = txDCOffset;
m_rxDCOffset = rxDCOffset;
m_rfLevel = rfLevel;
m_pocsagFrequency = pocsagFrequency + txOffset;
}
void CModem::setModeParams(bool dstarEnabled, bool dmrEnabled, bool ysfEnabled, bool p25Enabled, bool nxdnEnabled, bool pocsagEnabled)
{
m_dstarEnabled = dstarEnabled;
m_dmrEnabled = dmrEnabled;
m_ysfEnabled = ysfEnabled;
m_p25Enabled = p25Enabled;
m_nxdnEnabled = nxdnEnabled;
m_pocsagEnabled = pocsagEnabled;
}
void CModem::setLevels(float rxLevel, float cwIdTXLevel, float dstarTXLevel, float dmrTXLevel, float ysfTXLevel, float p25TXLevel, float nxdnTXLevel, float pocsagTXLevel)
{
m_rxLevel = rxLevel;
m_cwIdTXLevel = cwIdTXLevel;
m_dstarTXLevel = dstarTXLevel;
m_dmrTXLevel = dmrTXLevel;
m_ysfTXLevel = ysfTXLevel;
m_p25TXLevel = p25TXLevel;
m_nxdnTXLevel = nxdnTXLevel;
m_pocsagTXLevel = pocsagTXLevel;
}
void CModem::setDMRParams(unsigned int colorCode)
{
assert(colorCode < 16U);
m_dmrColorCode = colorCode;
}
void CModem::setYSFParams(bool loDev, unsigned int txHang)
{
m_ysfLoDev = loDev;
m_ysfTXHang = txHang;
}
bool CModem::open()
{
::LogMessage("Opening the MMDVM");
bool ret = m_serial.open();
if (!ret)
return false;
ret = readVersion();
if (!ret) {
m_serial.close();
return false;
} else {
/* Stopping the inactivity timer here when a firmware version has been
successfuly read prevents the death spiral of "no reply from modem..." */
m_inactivityTimer.stop();
}
ret = setFrequency();
if (!ret) {
m_serial.close();
return false;
}
ret = setConfig();
if (!ret) {
m_serial.close();
return false;
}
m_statusTimer.start();
m_error = false;
m_offset = 0U;
return true;
}
void CModem::clock(unsigned int ms)
{
// Poll the modem status every 250ms
m_statusTimer.clock(ms);
if (m_statusTimer.hasExpired()) {
readStatus();
m_statusTimer.start();
}
m_inactivityTimer.clock(ms);
if (m_inactivityTimer.hasExpired()) {
LogError("No reply from the modem for some time, resetting it");
m_error = true;
close();
CThread::sleep(2000U); // 2s
while (!open())
CThread::sleep(5000U); // 5s
}
RESP_TYPE_MMDVM type = getResponse();
if (type == RTM_TIMEOUT) {
// Nothing to do
} else if (type == RTM_ERROR) {
// Nothing to do
} else {
// type == RTM_OK
switch (m_buffer[2U]) {
case MMDVM_DSTAR_HEADER: {
if (m_trace)
CUtils::dump(1U, "RX D-Star Header", m_buffer, m_length);
unsigned char data = m_length - 2U;
m_rxDStarData.addData(&data, 1U);
data = TAG_HEADER;
m_rxDStarData.addData(&data, 1U);
m_rxDStarData.addData(m_buffer + 3U, m_length - 3U);
}
break;
case MMDVM_DSTAR_DATA: {
if (m_trace)
CUtils::dump(1U, "RX D-Star Data", m_buffer, m_length);
unsigned char data = m_length - 2U;
m_rxDStarData.addData(&data, 1U);
data = TAG_DATA;
m_rxDStarData.addData(&data, 1U);
m_rxDStarData.addData(m_buffer + 3U, m_length - 3U);
}
break;
case MMDVM_DSTAR_LOST: {
if (m_trace)
CUtils::dump(1U, "RX D-Star Lost", m_buffer, m_length);
unsigned char data = 1U;
m_rxDStarData.addData(&data, 1U);
data = TAG_LOST;
m_rxDStarData.addData(&data, 1U);
}
break;
case MMDVM_DSTAR_EOT: {
if (m_trace)
CUtils::dump(1U, "RX D-Star EOT", m_buffer, m_length);
unsigned char data = 1U;
m_rxDStarData.addData(&data, 1U);
data = TAG_EOT;
m_rxDStarData.addData(&data, 1U);
}
break;
case MMDVM_DMR_DATA1: {
if (m_trace)
CUtils::dump(1U, "RX DMR Data 1", m_buffer, m_length);
unsigned char data = m_length - 2U;
m_rxDMRData1.addData(&data, 1U);
if (m_buffer[3U] == (DMR_SYNC_DATA | DT_TERMINATOR_WITH_LC))
data = TAG_EOT;
else
data = TAG_DATA;
m_rxDMRData1.addData(&data, 1U);
m_rxDMRData1.addData(m_buffer + 3U, m_length - 3U);
}
break;
case MMDVM_DMR_DATA2: {
if (m_trace)
CUtils::dump(1U, "RX DMR Data 2", m_buffer, m_length);
unsigned char data = m_length - 2U;
m_rxDMRData2.addData(&data, 1U);
if (m_buffer[3U] == (DMR_SYNC_DATA | DT_TERMINATOR_WITH_LC))
data = TAG_EOT;
else
data = TAG_DATA;
m_rxDMRData2.addData(&data, 1U);
m_rxDMRData2.addData(m_buffer + 3U, m_length - 3U);
}
break;
case MMDVM_DMR_LOST1: {
if (m_trace)
CUtils::dump(1U, "RX DMR Lost 1", m_buffer, m_length);
unsigned char data = 1U;
m_rxDMRData1.addData(&data, 1U);
data = TAG_LOST;
m_rxDMRData1.addData(&data, 1U);
}
break;
case MMDVM_DMR_LOST2: {
if (m_trace)
CUtils::dump(1U, "RX DMR Lost 2", m_buffer, m_length);
unsigned char data = 1U;
m_rxDMRData2.addData(&data, 1U);
data = TAG_LOST;
m_rxDMRData2.addData(&data, 1U);
}
break;
case MMDVM_YSF_DATA: {
if (m_trace)
CUtils::dump(1U, "RX YSF Data", m_buffer, m_length);
unsigned char data = m_length - 2U;
m_rxYSFData.addData(&data, 1U);
data = TAG_DATA;
m_rxYSFData.addData(&data, 1U);
m_rxYSFData.addData(m_buffer + 3U, m_length - 3U);
}
break;
case MMDVM_YSF_LOST: {
if (m_trace)
CUtils::dump(1U, "RX YSF Lost", m_buffer, m_length);
unsigned char data = 1U;
m_rxYSFData.addData(&data, 1U);
data = TAG_LOST;
m_rxYSFData.addData(&data, 1U);
}
break;
case MMDVM_P25_HDR: {
if (m_trace)
CUtils::dump(1U, "RX P25 Header", m_buffer, m_length);
unsigned char data = m_length - 2U;
m_rxP25Data.addData(&data, 1U);
data = TAG_HEADER;
m_rxP25Data.addData(&data, 1U);
m_rxP25Data.addData(m_buffer + 3U, m_length - 3U);
}
break;
case MMDVM_P25_LDU: {
if (m_trace)
CUtils::dump(1U, "RX P25 LDU", m_buffer, m_length);
unsigned char data = m_length - 2U;
m_rxP25Data.addData(&data, 1U);
data = TAG_DATA;
m_rxP25Data.addData(&data, 1U);
m_rxP25Data.addData(m_buffer + 3U, m_length - 3U);
}
break;
case MMDVM_P25_LOST: {
if (m_trace)
CUtils::dump(1U, "RX P25 Lost", m_buffer, m_length);
unsigned char data = 1U;
m_rxP25Data.addData(&data, 1U);
data = TAG_LOST;
m_rxP25Data.addData(&data, 1U);
}
break;
case MMDVM_NXDN_DATA: {
if (m_trace)
CUtils::dump(1U, "RX NXDN Data", m_buffer, m_length);
unsigned char data = m_length - 2U;
m_rxNXDNData.addData(&data, 1U);
data = TAG_DATA;
m_rxNXDNData.addData(&data, 1U);
m_rxNXDNData.addData(m_buffer + 3U, m_length - 3U);
}
break;
case MMDVM_NXDN_LOST: {
if (m_trace)
CUtils::dump(1U, "RX NXDN Lost", m_buffer, m_length);
unsigned char data = 1U;
m_rxNXDNData.addData(&data, 1U);
data = TAG_LOST;
m_rxNXDNData.addData(&data, 1U);
}
break;
case MMDVM_GET_STATUS: {
// if (m_trace)
// CUtils::dump(1U, "GET_STATUS", m_buffer, m_length);
m_p25Space = 0U;
m_nxdnSpace = 0U;
m_pocsagSpace = 0U;
m_tx = (m_buffer[5U] & 0x01U) == 0x01U;
bool adcOverflow = (m_buffer[5U] & 0x02U) == 0x02U;
if (adcOverflow)
LogError("MMDVM ADC levels have overflowed");
bool rxOverflow = (m_buffer[5U] & 0x04U) == 0x04U;
if (rxOverflow)
LogError("MMDVM RX buffer has overflowed");
bool txOverflow = (m_buffer[5U] & 0x08U) == 0x08U;
if (txOverflow)
LogError("MMDVM TX buffer has overflowed");
m_lockout = (m_buffer[5U] & 0x10U) == 0x10U;
bool dacOverflow = (m_buffer[5U] & 0x20U) == 0x20U;
if (dacOverflow)
LogError("MMDVM DAC levels have overflowed");
m_cd = (m_buffer[5U] & 0x40U) == 0x40U;
m_dstarSpace = m_buffer[6U];
m_dmrSpace1 = m_buffer[7U];
m_dmrSpace2 = m_buffer[8U];
m_ysfSpace = m_buffer[9U];
if (m_length > 10U)
m_p25Space = m_buffer[10U];
if (m_length > 11U)
m_nxdnSpace = m_buffer[11U];
if (m_length > 12U)
m_pocsagSpace = m_buffer[12U];
m_inactivityTimer.start();
// LogMessage("status=%02X, tx=%d, space=%u,%u,%u,%u,%u,%u,%u lockout=%d, cd=%d", m_buffer[5U], int(m_tx), m_dstarSpace, m_dmrSpace1, m_dmrSpace2, m_ysfSpace, m_p25Space, m_nxdnSpace, m_pocsagSpace, int(m_lockout), int(m_cd));
}
break;
case MMDVM_TRANSPARENT: {
if (m_trace)
CUtils::dump(1U, "RX Transparent Data", m_buffer, m_length);
unsigned char data = m_length - 3U;
m_rxTransparentData.addData(&data, 1U);
m_rxTransparentData.addData(m_buffer + 3U, m_length - 3U);
}
break;
// These should not be received, but don't complain if we do
case MMDVM_GET_VERSION:
case MMDVM_ACK:
break;
case MMDVM_NAK:
LogWarning("Received a NAK from the MMDVM, command = 0x%02X, reason = %u", m_buffer[3U], m_buffer[4U]);
break;
case MMDVM_DEBUG1:
case MMDVM_DEBUG2:
case MMDVM_DEBUG3:
case MMDVM_DEBUG4:
case MMDVM_DEBUG5:
printDebug();
break;
default:
LogMessage("Unknown message, type: %02X", m_buffer[2U]);
CUtils::dump("Buffer dump", m_buffer, m_length);
break;
}
}
// Only feed data to the modem if the playout timer has expired
m_playoutTimer.clock(ms);
if (!m_playoutTimer.hasExpired())
return;
if (m_dstarSpace > 1U && !m_txDStarData.isEmpty()) {
unsigned char buffer[4U];
m_txDStarData.peek(buffer, 4U);
if ((buffer[3U] == MMDVM_DSTAR_HEADER && m_dstarSpace > 4U) ||
(buffer[3U] == MMDVM_DSTAR_DATA && m_dstarSpace > 1U) ||
(buffer[3U] == MMDVM_DSTAR_EOT && m_dstarSpace > 1U)) {
unsigned char len = 0U;
m_txDStarData.getData(&len, 1U);
m_txDStarData.getData(m_buffer, len);
switch (buffer[3U]) {
case MMDVM_DSTAR_HEADER:
if (m_trace)
CUtils::dump(1U, "TX D-Star Header", m_buffer, len);
m_dstarSpace -= 4U;
break;
case MMDVM_DSTAR_DATA:
if (m_trace)
CUtils::dump(1U, "TX D-Star Data", m_buffer, len);
m_dstarSpace -= 1U;
break;
default:
if (m_trace)
CUtils::dump(1U, "TX D-Star EOT", m_buffer, len);
m_dstarSpace -= 1U;
break;
}
int ret = m_serial.write(m_buffer, len);
if (ret != int(len))
LogWarning("Error when writing D-Star data to the MMDVM");
m_playoutTimer.start();
}
}
if (m_dmrSpace1 > 1U && !m_txDMRData1.isEmpty()) {
unsigned char len = 0U;
m_txDMRData1.getData(&len, 1U);
m_txDMRData1.getData(m_buffer, len);
if (m_trace)
CUtils::dump(1U, "TX DMR Data 1", m_buffer, len);
int ret = m_serial.write(m_buffer, len);
if (ret != int(len))
LogWarning("Error when writing DMR data to the MMDVM");
m_playoutTimer.start();
m_dmrSpace1--;
}
if (m_dmrSpace2 > 1U && !m_txDMRData2.isEmpty()) {
unsigned char len = 0U;
m_txDMRData2.getData(&len, 1U);
m_txDMRData2.getData(m_buffer, len);
if (m_trace)
CUtils::dump(1U, "TX DMR Data 2", m_buffer, len);
int ret = m_serial.write(m_buffer, len);
if (ret != int(len))
LogWarning("Error when writing DMR data to the MMDVM");
m_playoutTimer.start();
m_dmrSpace2--;
}
if (m_ysfSpace > 1U && !m_txYSFData.isEmpty()) {
unsigned char len = 0U;
m_txYSFData.getData(&len, 1U);
m_txYSFData.getData(m_buffer, len);
if (m_trace)
CUtils::dump(1U, "TX YSF Data", m_buffer, len);
int ret = m_serial.write(m_buffer, len);
if (ret != int(len))
LogWarning("Error when writing YSF data to the MMDVM");
m_playoutTimer.start();
m_ysfSpace--;
}
if (m_p25Space > 1U && !m_txP25Data.isEmpty()) {
unsigned char len = 0U;
m_txP25Data.getData(&len, 1U);
m_txP25Data.getData(m_buffer, len);
if (m_trace) {
if (m_buffer[2U] == MMDVM_P25_HDR)
CUtils::dump(1U, "TX P25 HDR", m_buffer, len);
else
CUtils::dump(1U, "TX P25 LDU", m_buffer, len);
}
int ret = m_serial.write(m_buffer, len);
if (ret != int(len))
LogWarning("Error when writing P25 data to the MMDVM");
m_playoutTimer.start();
m_p25Space--;
}
if (m_nxdnSpace > 1U && !m_txNXDNData.isEmpty()) {
unsigned char len = 0U;
m_txNXDNData.getData(&len, 1U);
m_txNXDNData.getData(m_buffer, len);
if (m_trace)
CUtils::dump(1U, "TX NXDN Data", m_buffer, len);
int ret = m_serial.write(m_buffer, len);
if (ret != int(len))
LogWarning("Error when writing NXDN data to the MMDVM");
m_playoutTimer.start();
m_nxdnSpace--;
}
if (m_pocsagSpace > 1U && !m_txPOCSAGData.isEmpty()) {
unsigned char len = 0U;
m_txPOCSAGData.getData(&len, 1U);
m_txPOCSAGData.getData(m_buffer, len);
if (m_trace)
CUtils::dump(1U, "TX POCSAG Data", m_buffer, len);
int ret = m_serial.write(m_buffer, len);
if (ret != int(len))
LogWarning("Error when writing POCSAG data to the MMDVM");
m_playoutTimer.start();
m_pocsagSpace--;
}
if (!m_txTransparentData.isEmpty()) {
unsigned char len = 0U;
m_txTransparentData.getData(&len, 1U);
m_txTransparentData.getData(m_buffer, len);
if (m_trace)
CUtils::dump(1U, "TX Transparent Data", m_buffer, len);
int ret = m_serial.write(m_buffer, len);
if (ret != int(len))
LogWarning("Error when writing Transparent data to the MMDVM");
}
}
void CModem::close()
{
::LogMessage("Closing the MMDVM");
m_serial.close();
}
unsigned int CModem::readDStarData(unsigned char* data)
{
assert(data != NULL);
if (m_rxDStarData.isEmpty())
return 0U;
unsigned char len = 0U;
m_rxDStarData.getData(&len, 1U);
m_rxDStarData.getData(data, len);
return len;
}
unsigned int CModem::readDMRData1(unsigned char* data)
{
assert(data != NULL);
if (m_rxDMRData1.isEmpty())
return 0U;
unsigned char len = 0U;
m_rxDMRData1.getData(&len, 1U);
m_rxDMRData1.getData(data, len);
return len;
}
unsigned int CModem::readDMRData2(unsigned char* data)
{
assert(data != NULL);
if (m_rxDMRData2.isEmpty())
return 0U;
unsigned char len = 0U;
m_rxDMRData2.getData(&len, 1U);
m_rxDMRData2.getData(data, len);
return len;
}
unsigned int CModem::readYSFData(unsigned char* data)
{
assert(data != NULL);
if (m_rxYSFData.isEmpty())
return 0U;
unsigned char len = 0U;
m_rxYSFData.getData(&len, 1U);
m_rxYSFData.getData(data, len);
return len;
}
unsigned int CModem::readP25Data(unsigned char* data)
{
assert(data != NULL);
if (m_rxP25Data.isEmpty())
return 0U;
unsigned char len = 0U;
m_rxP25Data.getData(&len, 1U);
m_rxP25Data.getData(data, len);
return len;
}
unsigned int CModem::readNXDNData(unsigned char* data)
{
assert(data != NULL);
if (m_rxNXDNData.isEmpty())
return 0U;
unsigned char len = 0U;
m_rxNXDNData.getData(&len, 1U);
m_rxNXDNData.getData(data, len);
return len;
}
unsigned int CModem::readTransparentData(unsigned char* data)
{
assert(data != NULL);
if (m_rxTransparentData.isEmpty())
return 0U;
unsigned char len = 0U;
m_rxTransparentData.getData(&len, 1U);
m_rxTransparentData.getData(data, len);
return len;
}
// To be implemented later if needed
unsigned int CModem::readSerial(unsigned char* data, unsigned int length)
{
assert(data != NULL);
assert(length > 0U);
return 0U;
}
bool CModem::hasDStarSpace() const
{
unsigned int space = m_txDStarData.freeSpace() / (DSTAR_FRAME_LENGTH_BYTES + 4U);
return space > 1U;
}
bool CModem::writeDStarData(const unsigned char* data, unsigned int length)
{
assert(data != NULL);
assert(length > 0U);
unsigned char buffer[50U];
buffer[0U] = MMDVM_FRAME_START;
buffer[1U] = length + 2U;
switch (data[0U]) {
case TAG_HEADER:
buffer[2U] = MMDVM_DSTAR_HEADER;
break;
case TAG_DATA:
buffer[2U] = MMDVM_DSTAR_DATA;
break;
case TAG_EOT:
buffer[2U] = MMDVM_DSTAR_EOT;
break;
default:
CUtils::dump(2U, "Unknown D-Star packet type", data, length);
return false;
}
::memcpy(buffer + 3U, data + 1U, length - 1U);
unsigned char len = length + 2U;
m_txDStarData.addData(&len, 1U);
m_txDStarData.addData(buffer, len);
return true;
}
bool CModem::hasDMRSpace1() const
{
unsigned int space = m_txDMRData1.freeSpace() / (DMR_FRAME_LENGTH_BYTES + 4U);
return space > 1U;
}
bool CModem::hasDMRSpace2() const
{
unsigned int space = m_txDMRData2.freeSpace() / (DMR_FRAME_LENGTH_BYTES + 4U);
return space > 1U;
}
bool CModem::writeDMRData1(const unsigned char* data, unsigned int length)
{
assert(data != NULL);
assert(length > 0U);
if (data[0U] != TAG_DATA && data[0U] != TAG_EOT)
return false;
unsigned char buffer[40U];
buffer[0U] = MMDVM_FRAME_START;
buffer[1U] = length + 2U;
buffer[2U] = MMDVM_DMR_DATA1;
::memcpy(buffer + 3U, data + 1U, length - 1U);
unsigned char len = length + 2U;
m_txDMRData1.addData(&len, 1U);
m_txDMRData1.addData(buffer, len);
return true;
}
bool CModem::writeDMRData2(const unsigned char* data, unsigned int length)
{
assert(data != NULL);
assert(length > 0U);
if (data[0U] != TAG_DATA && data[0U] != TAG_EOT)
return false;
unsigned char buffer[40U];
buffer[0U] = MMDVM_FRAME_START;
buffer[1U] = length + 2U;
buffer[2U] = MMDVM_DMR_DATA2;
::memcpy(buffer + 3U, data + 1U, length - 1U);
unsigned char len = length + 2U;
m_txDMRData2.addData(&len, 1U);
m_txDMRData2.addData(buffer, len);
return true;
}
bool CModem::hasYSFSpace() const
{
unsigned int space = m_txYSFData.freeSpace() / (YSF_FRAME_LENGTH_BYTES + 4U);
return space > 1U;
}
bool CModem::writeYSFData(const unsigned char* data, unsigned int length)
{
assert(data != NULL);
assert(length > 0U);
if (data[0U] != TAG_DATA && data[0U] != TAG_EOT)
return false;
unsigned char buffer[130U];
buffer[0U] = MMDVM_FRAME_START;
buffer[1U] = length + 2U;
buffer[2U] = MMDVM_YSF_DATA;
::memcpy(buffer + 3U, data + 1U, length - 1U);
unsigned char len = length + 2U;
m_txYSFData.addData(&len, 1U);
m_txYSFData.addData(buffer, len);
return true;
}
bool CModem::hasP25Space() const
{
unsigned int space = m_txP25Data.freeSpace() / (P25_LDU_FRAME_LENGTH_BYTES + 4U);
return space > 1U;
}
bool CModem::writeP25Data(const unsigned char* data, unsigned int length)
{
assert(data != NULL);
assert(length > 0U);
if (data[0U] != TAG_HEADER && data[0U] != TAG_DATA && data[0U] != TAG_EOT)
return false;
unsigned char buffer[250U];
buffer[0U] = MMDVM_FRAME_START;
buffer[1U] = length + 2U;
buffer[2U] = (data[0U] == TAG_HEADER) ? MMDVM_P25_HDR : MMDVM_P25_LDU;
::memcpy(buffer + 3U, data + 1U, length - 1U);
unsigned char len = length + 2U;
m_txP25Data.addData(&len, 1U);
m_txP25Data.addData(buffer, len);