[deb_libcec.git] / src / lib / AdapterCommunication.cpp

/*
 * This file is part of the libCEC(R) library.
 *
 * libCEC(R) is Copyright (C) 2011 Pulse-Eight Limited.  All rights reserved.
 * libCEC(R) is an original work, containing original code.
 *
 * libCEC(R) is a trademark of Pulse-Eight Limited.
 *
 * This program is dual-licensed; 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 *
 * Alternatively, you can license this library under a commercial license,
 * please contact Pulse-Eight Licensing for more information.
 *
 * For more information contact:
 * Pulse-Eight Licensing       <license@pulse-eight.com>
 *     http://www.pulse-eight.com/
 *     http://www.pulse-eight.net/
 */

#include "AdapterCommunication.h"

#include "CECProcessor.h"
#include "platform/serialport.h"
#include "util/StdString.h"
#include "platform/timeutils.h"

using namespace std;
using namespace CEC;

CCECAdapterMessage::CCECAdapterMessage(const cec_command &command)
{
  clear();
  maxTries = command.retries + 1;

  //set ack polarity to high when transmitting to the broadcast address
  //set ack polarity low when transmitting to any other address
  push_back(MSGSTART);
  push_escaped(MSGCODE_TRANSMIT_ACK_POLARITY);
  if (command.destination == CECDEVICE_BROADCAST)
    push_escaped(CEC_TRUE);
  else
    push_escaped(CEC_FALSE);
  push_back(MSGEND);

  // add source and destination
  push_back(MSGSTART);
  push_escaped(command.opcode_set == 0 ? (uint8_t)MSGCODE_TRANSMIT_EOM : (uint8_t)MSGCODE_TRANSMIT);
  push_back(((uint8_t)command.initiator << 4) + (uint8_t)command.destination);
  push_back(MSGEND);

  // add opcode
  if (command.opcode_set == 1)
  {
    push_back(MSGSTART);
    push_escaped(command.parameters.IsEmpty() ? (uint8_t)MSGCODE_TRANSMIT_EOM : (uint8_t)MSGCODE_TRANSMIT);
    push_back((uint8_t) command.opcode);
    push_back(MSGEND);

    // add parameters
    for (int8_t iPtr = 0; iPtr < command.parameters.size; iPtr++)
    {
      push_back(MSGSTART);

      if (iPtr == command.parameters.size - 1)
        push_escaped( MSGCODE_TRANSMIT_EOM);
      else
        push_escaped(MSGCODE_TRANSMIT);

      push_escaped(command.parameters[iPtr]);

      push_back(MSGEND);
    }
  }

  // set timeout
  transmit_timeout = command.transmit_timeout;
}

CCECAdapterMessage &CCECAdapterMessage::operator =(const CCECAdapterMessage &msg)
{
  packet = msg.packet;
  state  = msg.state;
  return *this;
}

CStdString CCECAdapterMessage::MessageCodeAsString(void) const
{
  CStdString strMsg;
  switch (message())
  {
  case MSGCODE_NOTHING:
    strMsg = "NOTHING";
    break;
  case MSGCODE_PING:
    strMsg = "PING";
    break;
  case MSGCODE_TIMEOUT_ERROR:
    strMsg = "TIMEOUT";
    break;
  case MSGCODE_HIGH_ERROR:
    strMsg = "HIGH_ERROR";
    break;
  case MSGCODE_LOW_ERROR:
    strMsg = "LOW_ERROR";
    break;
  case MSGCODE_FRAME_START:
    strMsg = "FRAME_START";
    break;
  case MSGCODE_FRAME_DATA:
    strMsg = "FRAME_DATA";
    break;
  case MSGCODE_RECEIVE_FAILED:
    strMsg = "RECEIVE_FAILED";
    break;
  case MSGCODE_COMMAND_ACCEPTED:
    strMsg = "COMMAND_ACCEPTED";
    break;
  case MSGCODE_COMMAND_REJECTED:
    strMsg = "COMMAND_REJECTED";
    break;
  case MSGCODE_SET_ACK_MASK:
    strMsg = "SET_ACK_MASK";
    break;
  case MSGCODE_TRANSMIT:
    strMsg = "TRANSMIT";
    break;
  case MSGCODE_TRANSMIT_EOM:
    strMsg = "TRANSMIT_EOM";
    break;
  case MSGCODE_TRANSMIT_IDLETIME:
    strMsg = "TRANSMIT_IDLETIME";
    break;
  case MSGCODE_TRANSMIT_ACK_POLARITY:
    strMsg = "TRANSMIT_ACK_POLARITY";
    break;
  case MSGCODE_TRANSMIT_LINE_TIMEOUT:
    strMsg = "TRANSMIT_LINE_TIMEOUT";
    break;
  case MSGCODE_TRANSMIT_SUCCEEDED:
    strMsg = "TRANSMIT_SUCCEEDED";
    break;
  case MSGCODE_TRANSMIT_FAILED_LINE:
    strMsg = "TRANSMIT_FAILED_LINE";
    break;
  case MSGCODE_TRANSMIT_FAILED_ACK:
    strMsg = "TRANSMIT_FAILED_ACK";
    break;
  case MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA:
    strMsg = "TRANSMIT_FAILED_TIMEOUT_DATA";
    break;
  case MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE:
    strMsg = "TRANSMIT_FAILED_TIMEOUT_LINE";
    break;
  case MSGCODE_FIRMWARE_VERSION:
    strMsg = "FIRMWARE_VERSION";
    break;
  case MSGCODE_START_BOOTLOADER:
    strMsg = "START_BOOTLOADER";
    break;
  case MSGCODE_FRAME_EOM:
    strMsg = "FRAME_EOM";
    break;
  case MSGCODE_FRAME_ACK:
    strMsg = "FRAME_ACK";
    break;
  }

  return strMsg;
}

CStdString CCECAdapterMessage::ToString(void) const
{
  CStdString strMsg;
  if (size() == 0)
  {
    strMsg = "empty message";
  }
  else
  {
    strMsg = MessageCodeAsString();

    switch (message())
    {
    case MSGCODE_TIMEOUT_ERROR:
    case MSGCODE_HIGH_ERROR:
    case MSGCODE_LOW_ERROR:
      {
        int iLine      = (size() >= 3) ? (at(1) << 8) | at(2) : 0;
        uint32_t iTime = (size() >= 7) ? (at(3) << 24) | (at(4) << 16) | (at(5) << 8) | at(6) : 0;
        strMsg.AppendFormat(" line:%i", iLine);
        strMsg.AppendFormat(" time:%u", iTime);
      }
      break;
    case MSGCODE_FRAME_START:
      if (size() >= 2)
        strMsg.AppendFormat(" initiator:%1x destination:%1x ack:%s %s", initiator(), destination(), ack() ? "high" : "low", eom() ? "eom" : "");
      break;
    case MSGCODE_FRAME_DATA:
      if (size() >= 2)
        strMsg.AppendFormat(" %02x %s", at(1), eom() ? "eom" : "");
      break;
    default:
      break;
    }
  }

  return strMsg;
}

bool CCECAdapterMessage::is_error(void) const
{
  cec_adapter_messagecode code = message();
  return (code == MSGCODE_HIGH_ERROR ||
    code == MSGCODE_LOW_ERROR ||
    code == MSGCODE_RECEIVE_FAILED ||
    code == MSGCODE_COMMAND_REJECTED ||
    code == MSGCODE_TRANSMIT_LINE_TIMEOUT ||
    code == MSGCODE_TRANSMIT_FAILED_LINE ||
    code == MSGCODE_TRANSMIT_FAILED_ACK ||
    code == MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA ||
    code == MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE);
}

void CCECAdapterMessage::push_escaped(uint8_t byte)
{
  if (byte >= MSGESC)
  {
    push_back(MSGESC);
    push_back(byte - ESCOFFSET);
  }
  else
    push_back(byte);
}

CAdapterCommunication::CAdapterCommunication(CCECProcessor *processor) :
    m_port(NULL),
    m_processor(processor),
    m_iLineTimeout(0)
{
  m_port = new CSerialPort;
}

CAdapterCommunication::~CAdapterCommunication(void)
{
  Close();

  if (m_port)
  {
    delete m_port;
    m_port = NULL;
  }
}

bool CAdapterCommunication::Open(const char *strPort, uint16_t iBaudRate /* = 38400 */, uint32_t iTimeoutMs /* = 10000 */)
{
  CLockObject lock(&m_mutex);
  if (!m_port)
  {
    m_processor->AddLog(CEC_LOG_ERROR, "port is NULL");
    return false;
  }

  if (IsOpen())
  {
    m_processor->AddLog(CEC_LOG_ERROR, "port is already open");
  }

  if (!m_port->Open(strPort, iBaudRate))
  {
    CStdString strError;
    strError.Format("error opening serial port '%s': %s", strPort, m_port->GetError().c_str());
    m_processor->AddLog(CEC_LOG_ERROR, strError);
    return false;
  }

  m_processor->AddLog(CEC_LOG_DEBUG, "connection opened");

  //clear any input bytes
  uint8_t buff[1];
  while (m_port->Read(buff, 1, 5) == 1) {}

  if (CreateThread())
  {
    m_startCondition.Wait(&m_mutex);
    m_processor->AddLog(CEC_LOG_DEBUG, "communication thread started");
    return true;
  }
  else
  {
    m_processor->AddLog(CEC_LOG_DEBUG, "could not create a communication thread");
  }

  return false;
}

void CAdapterCommunication::Close(void)
{
  CLockObject lock(&m_mutex);
  m_startCondition.Broadcast();
  m_rcvCondition.Broadcast();
  StopThread();
}

void *CAdapterCommunication::Process(void)
{
  {
    CLockObject lock(&m_mutex);
    m_startCondition.Signal();
  }

  while (!IsStopped())
  {
    ReadFromDevice(50);
    Sleep(5);
    WriteNextCommand();
  }

  CCECAdapterMessage *msg;
  if (m_outBuffer.Pop(msg))
    msg->condition.Broadcast();

  return NULL;
}

bool CAdapterCommunication::ReadFromDevice(uint32_t iTimeout)
{
  int32_t iBytesRead;
  uint8_t buff[1024];
  if (!m_port)
    return false;

  iBytesRead = m_port->Read(buff, sizeof(buff), iTimeout);
  if (iBytesRead < 0 || iBytesRead > 256)
  {
    CStdString strError;
    strError.Format("error reading from serial port: %s", m_port->GetError().c_str());
    m_processor->AddLog(CEC_LOG_ERROR, strError);
    return false;
  }
  else if (iBytesRead > 0)
    AddData(buff, (uint8_t) iBytesRead);

  return iBytesRead > 0;
}

void CAdapterCommunication::AddData(uint8_t *data, uint8_t iLen)
{
  CLockObject lock(&m_mutex);
  for (unsigned int iPtr = 0; iPtr < iLen; iPtr++)
    m_inBuffer.Push(data[iPtr]);

  m_rcvCondition.Signal();
}

void CAdapterCommunication::WriteNextCommand(void)
{
  CCECAdapterMessage *msg;
  if (m_outBuffer.Pop(msg))
    SendMessageToAdapter(msg);
}

void CAdapterCommunication::SendMessageToAdapter(CCECAdapterMessage *msg)
{
  CLockObject lock(&msg->mutex);
  if (m_port->Write(msg) != (int32_t) msg->size())
  {
    CStdString strError;
    strError.Format("error writing to serial port: %s", m_port->GetError().c_str());
    m_processor->AddLog(CEC_LOG_ERROR, strError);
    msg->state = ADAPTER_MESSAGE_STATE_ERROR;
  }
  else
  {
    m_processor->AddLog(CEC_LOG_DEBUG, "command sent");
    msg->state = ADAPTER_MESSAGE_STATE_SENT;
  }
  msg->condition.Signal();
}

bool CAdapterCommunication::Write(CCECAdapterMessage *data)
{
  data->state = ADAPTER_MESSAGE_STATE_WAITING;
  m_outBuffer.Push(data);
  return true;
}

bool CAdapterCommunication::Read(CCECAdapterMessage &msg, uint32_t iTimeout)
{
  CLockObject lock(&m_mutex);

  msg.clear();
  uint64_t iNow = GetTimeMs();
  uint64_t iTarget = iNow + iTimeout;
  bool bGotFullMessage(false);
  bool bNextIsEscaped(false);
  bool bGotStart(false);

  while(!bGotFullMessage && iNow < iTarget)
  {
    uint8_t buf = 0;
    if (!m_inBuffer.Pop(buf))
    {
      if (!m_rcvCondition.Wait(&m_mutex, (uint32_t) (iTarget - iNow)))
        return false;
    }

    if (!bGotStart)
    {
      if (buf == MSGSTART)
        bGotStart = true;
      continue;
    }
    else if (buf == MSGSTART) //we found a msgstart before msgend, this is not right, remove
    {
      if (msg.size() > 0)
        m_processor->AddLog(CEC_LOG_WARNING, "received MSGSTART before MSGEND, removing previous buffer contents");
      msg.clear();
      bGotStart = true;
    }

    if (buf == MSGEND)
    {
      bGotFullMessage = true;
    }
    else if (bNextIsEscaped)
    {
      msg.push_back(buf + (uint8_t)ESCOFFSET);
      bNextIsEscaped = false;
    }
    else if (buf == MSGESC)
      bNextIsEscaped = true;
    else
      msg.push_back(buf);
  }

  if (bGotFullMessage)
    msg.state = ADAPTER_MESSAGE_STATE_RECEIVED;

  return bGotFullMessage;
}

std::string CAdapterCommunication::GetError(void) const
{
  return m_port->GetError();
}

bool CAdapterCommunication::StartBootloader(void)
{
  bool bReturn(false);
  if (!IsRunning())
    return bReturn;

  m_processor->AddLog(CEC_LOG_DEBUG, "starting the bootloader");
  CCECAdapterMessage *output = new CCECAdapterMessage;

  output->push_back(MSGSTART);
  output->push_escaped(MSGCODE_START_BOOTLOADER);
  output->push_back(MSGEND);

  CLockObject lock(&output->mutex);
  if (Write(output))
    output->condition.Wait(&output->mutex);
  bReturn = output->state == ADAPTER_MESSAGE_STATE_SENT;
  delete output;

  return bReturn;
}

bool CAdapterCommunication::PingAdapter(void)
{
  bool bReturn(false);
  if (!IsRunning())
    return bReturn;

  m_processor->AddLog(CEC_LOG_DEBUG, "sending ping");
  CCECAdapterMessage *output = new CCECAdapterMessage;

  output->push_back(MSGSTART);
  output->push_escaped(MSGCODE_PING);
  output->push_back(MSGEND);

  CLockObject lock(&output->mutex);
  if (Write(output))
    output->condition.Wait(&output->mutex);
  bReturn = output->state == ADAPTER_MESSAGE_STATE_SENT;
  delete output;

  return bReturn;
}

bool CAdapterCommunication::SetLineTimeout(uint8_t iTimeout)
{
  bool bReturn(m_iLineTimeout != iTimeout);

  if (!bReturn)
  {
    CCECAdapterMessage *output = new CCECAdapterMessage;

    output->push_back(MSGSTART);
    output->push_escaped(MSGCODE_TRANSMIT_IDLETIME);
    output->push_escaped(iTimeout);
    output->push_back(MSGEND);

    if ((bReturn = Write(output)) == false)
      m_processor->AddLog(CEC_LOG_ERROR, "could not set the idletime");
    delete output;
  }

  return bReturn;
}

bool CAdapterCommunication::IsOpen(void) const
{
  return !IsStopped() && m_port->IsOpen() && IsRunning();
}
Commit	Line	Data
	1	/*
	2	* This file is part of the libCEC(R) library.
	3	*
	4	* libCEC(R) is Copyright (C) 2011 Pulse-Eight Limited. All rights reserved.
	5	* libCEC(R) is an original work, containing original code.
	6	*
	7	* libCEC(R) is a trademark of Pulse-Eight Limited.
	8	*
	9	* This program is dual-licensed; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	22	*
	23	*
	24	* Alternatively, you can license this library under a commercial license,
	25	* please contact Pulse-Eight Licensing for more information.
	26	*
	27	* For more information contact:
	28	* Pulse-Eight Licensing <license@pulse-eight.com>
	29	* http://www.pulse-eight.com/
	30	* http://www.pulse-eight.net/
	31	*/
	32
	33	#include "AdapterCommunication.h"
	34
	35	#include "CECProcessor.h"
	36	#include "platform/serialport.h"
	37	#include "util/StdString.h"
	38	#include "platform/timeutils.h"
	39
	40	using namespace std;
	41	using namespace CEC;
	42
	43	CCECAdapterMessage::CCECAdapterMessage(const cec_command &command)
	44	{
	45	clear();
	46	maxTries = command.retries + 1;
	47
	48	//set ack polarity to high when transmitting to the broadcast address
	49	//set ack polarity low when transmitting to any other address
	50	push_back(MSGSTART);
	51	push_escaped(MSGCODE_TRANSMIT_ACK_POLARITY);
	52	if (command.destination == CECDEVICE_BROADCAST)
	53	push_escaped(CEC_TRUE);
	54	else
	55	push_escaped(CEC_FALSE);
	56	push_back(MSGEND);
	57
	58	// add source and destination
	59	push_back(MSGSTART);
	60	push_escaped(command.opcode_set == 0 ? (uint8_t)MSGCODE_TRANSMIT_EOM : (uint8_t)MSGCODE_TRANSMIT);
	61	push_back(((uint8_t)command.initiator << 4) + (uint8_t)command.destination);
	62	push_back(MSGEND);
	63
	64	// add opcode
	65	if (command.opcode_set == 1)
	66	{
	67	push_back(MSGSTART);
	68	push_escaped(command.parameters.IsEmpty() ? (uint8_t)MSGCODE_TRANSMIT_EOM : (uint8_t)MSGCODE_TRANSMIT);
	69	push_back((uint8_t) command.opcode);
	70	push_back(MSGEND);
	71
	72	// add parameters
	73	for (int8_t iPtr = 0; iPtr < command.parameters.size; iPtr++)
	74	{
	75	push_back(MSGSTART);
	76
	77	if (iPtr == command.parameters.size - 1)
	78	push_escaped( MSGCODE_TRANSMIT_EOM);
	79	else
	80	push_escaped(MSGCODE_TRANSMIT);
	81
	82	push_escaped(command.parameters[iPtr]);
	83
	84	push_back(MSGEND);
	85	}
	86	}
	87
	88	// set timeout
	89	transmit_timeout = command.transmit_timeout;
	90	}
	91
	92	CCECAdapterMessage &CCECAdapterMessage::operator =(const CCECAdapterMessage &msg)
	93	{
	94	packet = msg.packet;
	95	state = msg.state;
	96	return *this;
	97	}
	98
	99	CStdString CCECAdapterMessage::MessageCodeAsString(void) const
	100	{
	101	CStdString strMsg;
	102	switch (message())
	103	{
	104	case MSGCODE_NOTHING:
	105	strMsg = "NOTHING";
	106	break;
	107	case MSGCODE_PING:
	108	strMsg = "PING";
	109	break;
	110	case MSGCODE_TIMEOUT_ERROR:
	111	strMsg = "TIMEOUT";
	112	break;
	113	case MSGCODE_HIGH_ERROR:
	114	strMsg = "HIGH_ERROR";
	115	break;
	116	case MSGCODE_LOW_ERROR:
	117	strMsg = "LOW_ERROR";
	118	break;
	119	case MSGCODE_FRAME_START:
	120	strMsg = "FRAME_START";
	121	break;
	122	case MSGCODE_FRAME_DATA:
	123	strMsg = "FRAME_DATA";
	124	break;
	125	case MSGCODE_RECEIVE_FAILED:
	126	strMsg = "RECEIVE_FAILED";
	127	break;
	128	case MSGCODE_COMMAND_ACCEPTED:
	129	strMsg = "COMMAND_ACCEPTED";
	130	break;
	131	case MSGCODE_COMMAND_REJECTED:
	132	strMsg = "COMMAND_REJECTED";
	133	break;
	134	case MSGCODE_SET_ACK_MASK:
	135	strMsg = "SET_ACK_MASK";
	136	break;
	137	case MSGCODE_TRANSMIT:
	138	strMsg = "TRANSMIT";
	139	break;
	140	case MSGCODE_TRANSMIT_EOM:
	141	strMsg = "TRANSMIT_EOM";
	142	break;
	143	case MSGCODE_TRANSMIT_IDLETIME:
	144	strMsg = "TRANSMIT_IDLETIME";
	145	break;
	146	case MSGCODE_TRANSMIT_ACK_POLARITY:
	147	strMsg = "TRANSMIT_ACK_POLARITY";
	148	break;
	149	case MSGCODE_TRANSMIT_LINE_TIMEOUT:
	150	strMsg = "TRANSMIT_LINE_TIMEOUT";
	151	break;
	152	case MSGCODE_TRANSMIT_SUCCEEDED:
	153	strMsg = "TRANSMIT_SUCCEEDED";
	154	break;
	155	case MSGCODE_TRANSMIT_FAILED_LINE:
	156	strMsg = "TRANSMIT_FAILED_LINE";
	157	break;
	158	case MSGCODE_TRANSMIT_FAILED_ACK:
	159	strMsg = "TRANSMIT_FAILED_ACK";
	160	break;
	161	case MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA:
	162	strMsg = "TRANSMIT_FAILED_TIMEOUT_DATA";
	163	break;
	164	case MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE:
	165	strMsg = "TRANSMIT_FAILED_TIMEOUT_LINE";
	166	break;
	167	case MSGCODE_FIRMWARE_VERSION:
	168	strMsg = "FIRMWARE_VERSION";
	169	break;
	170	case MSGCODE_START_BOOTLOADER:
	171	strMsg = "START_BOOTLOADER";
	172	break;
	173	case MSGCODE_FRAME_EOM:
	174	strMsg = "FRAME_EOM";
	175	break;
	176	case MSGCODE_FRAME_ACK:
	177	strMsg = "FRAME_ACK";
	178	break;
	179	}
	180
	181	return strMsg;
	182	}
	183
	184	CStdString CCECAdapterMessage::ToString(void) const
	185	{
	186	CStdString strMsg;
	187	if (size() == 0)
	188	{
	189	strMsg = "empty message";
	190	}
	191	else
	192	{
	193	strMsg = MessageCodeAsString();
	194
	195	switch (message())
	196	{
	197	case MSGCODE_TIMEOUT_ERROR:
	198	case MSGCODE_HIGH_ERROR:
	199	case MSGCODE_LOW_ERROR:
	200	{
	201	int iLine = (size() >= 3) ? (at(1) << 8) \| at(2) : 0;
	202	uint32_t iTime = (size() >= 7) ? (at(3) << 24) \| (at(4) << 16) \| (at(5) << 8) \| at(6) : 0;
	203	strMsg.AppendFormat(" line:%i", iLine);
	204	strMsg.AppendFormat(" time:%u", iTime);
	205	}
	206	break;
	207	case MSGCODE_FRAME_START:
	208	if (size() >= 2)
	209	strMsg.AppendFormat(" initiator:%1x destination:%1x ack:%s %s", initiator(), destination(), ack() ? "high" : "low", eom() ? "eom" : "");
	210	break;
	211	case MSGCODE_FRAME_DATA:
	212	if (size() >= 2)
	213	strMsg.AppendFormat(" %02x %s", at(1), eom() ? "eom" : "");
	214	break;
	215	default:
	216	break;
	217	}
	218	}
	219
	220	return strMsg;
	221	}
	222
	223	bool CCECAdapterMessage::is_error(void) const
	224	{
	225	cec_adapter_messagecode code = message();
	226	return (code == MSGCODE_HIGH_ERROR \|\|
	227	code == MSGCODE_LOW_ERROR \|\|
	228	code == MSGCODE_RECEIVE_FAILED \|\|
	229	code == MSGCODE_COMMAND_REJECTED \|\|
	230	code == MSGCODE_TRANSMIT_LINE_TIMEOUT \|\|
	231	code == MSGCODE_TRANSMIT_FAILED_LINE \|\|
	232	code == MSGCODE_TRANSMIT_FAILED_ACK \|\|
	233	code == MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA \|\|
	234	code == MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE);
	235	}
	236
	237	void CCECAdapterMessage::push_escaped(uint8_t byte)
	238	{
	239	if (byte >= MSGESC)
	240	{
	241	push_back(MSGESC);
	242	push_back(byte - ESCOFFSET);
	243	}
	244	else
	245	push_back(byte);
	246	}
	247
	248	CAdapterCommunication::CAdapterCommunication(CCECProcessor *processor) :
	249	m_port(NULL),
	250	m_processor(processor),
	251	m_iLineTimeout(0)
	252	{
	253	m_port = new CSerialPort;
	254	}
	255
	256	CAdapterCommunication::~CAdapterCommunication(void)
	257	{
	258	Close();
	259
	260	if (m_port)
	261	{
	262	delete m_port;
	263	m_port = NULL;
	264	}
	265	}
	266
	267	bool CAdapterCommunication::Open(const char strPort, uint16_t iBaudRate / = 38400 /, uint32_t iTimeoutMs / = 10000 */)
	268	{
	269	CLockObject lock(&m_mutex);
	270	if (!m_port)
	271	{
	272	m_processor->AddLog(CEC_LOG_ERROR, "port is NULL");
	273	return false;
	274	}
	275
	276	if (IsOpen())
	277	{
	278	m_processor->AddLog(CEC_LOG_ERROR, "port is already open");
	279	}
	280
	281	if (!m_port->Open(strPort, iBaudRate))
	282	{
	283	CStdString strError;
	284	strError.Format("error opening serial port '%s': %s", strPort, m_port->GetError().c_str());
	285	m_processor->AddLog(CEC_LOG_ERROR, strError);
	286	return false;
	287	}
	288
	289	m_processor->AddLog(CEC_LOG_DEBUG, "connection opened");
	290
	291	//clear any input bytes
	292	uint8_t buff[1];
	293	while (m_port->Read(buff, 1, 5) == 1) {}
	294
	295	if (CreateThread())
	296	{
	297	m_startCondition.Wait(&m_mutex);
	298	m_processor->AddLog(CEC_LOG_DEBUG, "communication thread started");
	299	return true;
	300	}
	301	else
	302	{
	303	m_processor->AddLog(CEC_LOG_DEBUG, "could not create a communication thread");
	304	}
	305
	306	return false;
	307	}
	308
	309	void CAdapterCommunication::Close(void)
	310	{
	311	CLockObject lock(&m_mutex);
	312	m_startCondition.Broadcast();
	313	m_rcvCondition.Broadcast();
	314	StopThread();
	315	}
	316
	317	void *CAdapterCommunication::Process(void)
	318	{
	319	{
	320	CLockObject lock(&m_mutex);
	321	m_startCondition.Signal();
	322	}
	323
	324	while (!IsStopped())
	325	{
	326	ReadFromDevice(50);
	327	Sleep(5);
	328	WriteNextCommand();
	329	}
	330
	331	CCECAdapterMessage *msg;
	332	if (m_outBuffer.Pop(msg))
	333	msg->condition.Broadcast();
	334
	335	return NULL;
	336	}
	337
	338	bool CAdapterCommunication::ReadFromDevice(uint32_t iTimeout)
	339	{
	340	int32_t iBytesRead;
	341	uint8_t buff[1024];
	342	if (!m_port)
	343	return false;
	344
	345	iBytesRead = m_port->Read(buff, sizeof(buff), iTimeout);
	346	if (iBytesRead < 0 \|\| iBytesRead > 256)
	347	{
	348	CStdString strError;
	349	strError.Format("error reading from serial port: %s", m_port->GetError().c_str());
	350	m_processor->AddLog(CEC_LOG_ERROR, strError);
	351	return false;
	352	}
	353	else if (iBytesRead > 0)
	354	AddData(buff, (uint8_t) iBytesRead);
	355
	356	return iBytesRead > 0;
	357	}
	358
	359	void CAdapterCommunication::AddData(uint8_t *data, uint8_t iLen)
	360	{
	361	CLockObject lock(&m_mutex);
	362	for (unsigned int iPtr = 0; iPtr < iLen; iPtr++)
	363	m_inBuffer.Push(data[iPtr]);
	364
	365	m_rcvCondition.Signal();
	366	}
	367
	368	void CAdapterCommunication::WriteNextCommand(void)
	369	{
	370	CCECAdapterMessage *msg;
	371	if (m_outBuffer.Pop(msg))
	372	SendMessageToAdapter(msg);
	373	}
	374
	375	void CAdapterCommunication::SendMessageToAdapter(CCECAdapterMessage *msg)
	376	{
	377	CLockObject lock(&msg->mutex);
	378	if (m_port->Write(msg) != (int32_t) msg->size())
	379	{
	380	CStdString strError;
	381	strError.Format("error writing to serial port: %s", m_port->GetError().c_str());
	382	m_processor->AddLog(CEC_LOG_ERROR, strError);
	383	msg->state = ADAPTER_MESSAGE_STATE_ERROR;
	384	}
	385	else
	386	{
	387	m_processor->AddLog(CEC_LOG_DEBUG, "command sent");
	388	msg->state = ADAPTER_MESSAGE_STATE_SENT;
	389	}
	390	msg->condition.Signal();
	391	}
	392
	393	bool CAdapterCommunication::Write(CCECAdapterMessage *data)
	394	{
	395	data->state = ADAPTER_MESSAGE_STATE_WAITING;
	396	m_outBuffer.Push(data);
	397	return true;
	398	}
	399
	400	bool CAdapterCommunication::Read(CCECAdapterMessage &msg, uint32_t iTimeout)
	401	{
	402	CLockObject lock(&m_mutex);
	403
	404	msg.clear();
	405	uint64_t iNow = GetTimeMs();
	406	uint64_t iTarget = iNow + iTimeout;
	407	bool bGotFullMessage(false);
	408	bool bNextIsEscaped(false);
	409	bool bGotStart(false);
	410
	411	while(!bGotFullMessage && iNow < iTarget)
	412	{
	413	uint8_t buf = 0;
	414	if (!m_inBuffer.Pop(buf))
	415	{
	416	if (!m_rcvCondition.Wait(&m_mutex, (uint32_t) (iTarget - iNow)))
	417	return false;
	418	}
	419
	420	if (!bGotStart)
	421	{
	422	if (buf == MSGSTART)
	423	bGotStart = true;
	424	continue;
	425	}
	426	else if (buf == MSGSTART) //we found a msgstart before msgend, this is not right, remove
	427	{
	428	if (msg.size() > 0)
	429	m_processor->AddLog(CEC_LOG_WARNING, "received MSGSTART before MSGEND, removing previous buffer contents");
	430	msg.clear();
	431	bGotStart = true;
	432	}
	433
	434	if (buf == MSGEND)
	435	{
	436	bGotFullMessage = true;
	437	}
	438	else if (bNextIsEscaped)
	439	{
	440	msg.push_back(buf + (uint8_t)ESCOFFSET);
	441	bNextIsEscaped = false;
	442	}
	443	else if (buf == MSGESC)
	444	bNextIsEscaped = true;
	445	else
	446	msg.push_back(buf);
	447	}
	448
	449	if (bGotFullMessage)
	450	msg.state = ADAPTER_MESSAGE_STATE_RECEIVED;
	451
	452	return bGotFullMessage;
	453	}
	454
	455	std::string CAdapterCommunication::GetError(void) const
	456	{
	457	return m_port->GetError();
	458	}
	459
	460	bool CAdapterCommunication::StartBootloader(void)
	461	{
	462	bool bReturn(false);
	463	if (!IsRunning())
	464	return bReturn;
	465
	466	m_processor->AddLog(CEC_LOG_DEBUG, "starting the bootloader");
	467	CCECAdapterMessage *output = new CCECAdapterMessage;
	468
	469	output->push_back(MSGSTART);
	470	output->push_escaped(MSGCODE_START_BOOTLOADER);
	471	output->push_back(MSGEND);
	472
	473	CLockObject lock(&output->mutex);
	474	if (Write(output))
	475	output->condition.Wait(&output->mutex);
	476	bReturn = output->state == ADAPTER_MESSAGE_STATE_SENT;
	477	delete output;
	478
	479	return bReturn;
	480	}
	481
	482	bool CAdapterCommunication::PingAdapter(void)
	483	{
	484	bool bReturn(false);
	485	if (!IsRunning())
	486	return bReturn;
	487
	488	m_processor->AddLog(CEC_LOG_DEBUG, "sending ping");
	489	CCECAdapterMessage *output = new CCECAdapterMessage;
	490
	491	output->push_back(MSGSTART);
	492	output->push_escaped(MSGCODE_PING);
	493	output->push_back(MSGEND);
	494
	495	CLockObject lock(&output->mutex);
	496	if (Write(output))
	497	output->condition.Wait(&output->mutex);
	498	bReturn = output->state == ADAPTER_MESSAGE_STATE_SENT;
	499	delete output;
	500
	501	return bReturn;
	502	}
	503
	504	bool CAdapterCommunication::SetLineTimeout(uint8_t iTimeout)
	505	{
	506	bool bReturn(m_iLineTimeout != iTimeout);
	507
	508	if (!bReturn)
	509	{
	510	CCECAdapterMessage *output = new CCECAdapterMessage;
	511
	512	output->push_back(MSGSTART);
	513	output->push_escaped(MSGCODE_TRANSMIT_IDLETIME);
	514	output->push_escaped(iTimeout);
	515	output->push_back(MSGEND);
	516
	517	if ((bReturn = Write(output)) == false)
	518	m_processor->AddLog(CEC_LOG_ERROR, "could not set the idletime");
	519	delete output;
	520	}
	521
	522	return bReturn;
	523	}
	524
	525	bool CAdapterCommunication::IsOpen(void) const
	526	{
	527	return !IsStopped() && m_port->IsOpen() && IsRunning();
	528	}