2 * This file is part of the libCEC(R) library.
4 * libCEC(R) is Copyright (C) 2011 Pulse-Eight Limited. All rights reserved.
5 * libCEC(R) is an original work, containing original code.
7 * libCEC(R) is a trademark of Pulse-Eight Limited.
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.
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.
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.
24 * Alternatively, you can license this library under a commercial license,
25 * please contact Pulse-Eight Licensing for more information.
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/
33 #include "AdapterCommunication.h"
36 #include "platform/serialport.h"
37 #include "util/StdString.h"
38 #include "platform/timeutils.h"
43 CAdapterCommunication::CAdapterCommunication(CLibCEC
*controller
) :
45 m_controller(controller
)
47 m_port
= new CSerialPort
;
50 CAdapterCommunication::~CAdapterCommunication(void)
61 bool CAdapterCommunication::Open(const char *strPort
, uint16_t iBaudRate
/* = 38400 */, uint32_t iTimeoutMs
/* = 10000 */)
63 CLockObject
lock(&m_commMutex
);
66 m_controller
->AddLog(CEC_LOG_ERROR
, "port is NULL");
72 m_controller
->AddLog(CEC_LOG_ERROR
, "port is already open");
75 if (!m_port
->Open(strPort
, iBaudRate
))
78 strError
.Format("error opening serial port '%s': %s", strPort
, m_port
->GetError().c_str());
79 m_controller
->AddLog(CEC_LOG_ERROR
, strError
);
83 m_controller
->AddLog(CEC_LOG_DEBUG
, "connection opened");
85 //clear any input bytes
87 m_port
->Read(buff
, sizeof(buff
), 500);
91 m_controller
->AddLog(CEC_LOG_DEBUG
, "communication thread created");
96 m_controller
->AddLog(CEC_LOG_DEBUG
, "could not create a communication thread");
102 void CAdapterCommunication::Close(void)
104 CLockObject
lock(&m_commMutex
);
107 m_rcvCondition
.Broadcast();
110 void *CAdapterCommunication::Process(void)
112 m_controller
->AddLog(CEC_LOG_DEBUG
, "communication thread started");
117 CLockObject
lock(&m_commMutex
);
128 bool CAdapterCommunication::ReadFromDevice(uint32_t iTimeout
)
135 iBytesRead
= m_port
->Read(buff
, sizeof(buff
), iTimeout
);
136 if (iBytesRead
< 0 || iBytesRead
> 256)
139 strError
.Format("error reading from serial port: %s", m_port
->GetError().c_str());
140 m_controller
->AddLog(CEC_LOG_ERROR
, strError
);
143 else if (iBytesRead
> 0)
144 AddData(buff
, (uint8_t) iBytesRead
);
146 return iBytesRead
> 0;
149 void CAdapterCommunication::AddData(uint8_t *data
, uint8_t iLen
)
151 CLockObject
lock(&m_bufferMutex
);
152 for (unsigned int iPtr
= 0; iPtr
< iLen
; iPtr
++)
153 m_inBuffer
.Push(data
[iPtr
]);
155 m_rcvCondition
.Signal();
158 bool CAdapterCommunication::Write(const cec_adapter_message
&data
)
160 CLockObject
lock(&m_commMutex
);
161 if (m_port
->Write(data
) != (int32_t) data
.size())
164 strError
.Format("error writing to serial port: %s", m_port
->GetError().c_str());
165 m_controller
->AddLog(CEC_LOG_ERROR
, strError
);
169 m_controller
->AddLog(CEC_LOG_DEBUG
, "command sent");
170 CCondition::Sleep((uint32_t) data
.size() * (uint32_t)24 /*data*/ + (uint32_t)5 /*start bit (4.5 ms)*/);
175 bool CAdapterCommunication::Read(cec_adapter_message
&msg
, uint32_t iTimeout
)
177 CLockObject
lock(&m_bufferMutex
);
180 uint64_t iNow
= GetTimeMs();
181 uint64_t iTarget
= iNow
+ iTimeout
;
182 bool bGotFullMessage(false);
183 bool bNextIsEscaped(false);
184 bool bGotStart(false);
186 while(!bGotFullMessage
&& iNow
< iTarget
)
189 if (!m_inBuffer
.Pop(buf
))
191 if (!m_rcvCondition
.Wait(&m_bufferMutex
, iTarget
- iNow
))
201 else if (buf
== MSGSTART
) //we found a msgstart before msgend, this is not right, remove
203 m_controller
->AddLog(CEC_LOG_ERROR
, "received MSGSTART before MSGEND");
210 bGotFullMessage
= true;
212 else if (bNextIsEscaped
)
214 msg
.push_back(buf
+ (uint8_t)ESCOFFSET
);
215 bNextIsEscaped
= false;
217 else if (buf
== MSGESC
)
218 bNextIsEscaped
= true;
223 return bGotFullMessage
;
226 std::string
CAdapterCommunication::GetError(void) const
228 return m_port
->GetError();
231 bool CAdapterCommunication::StartBootloader(void)
236 m_controller
->AddLog(CEC_LOG_DEBUG
, "starting the bootloader");
237 cec_adapter_message output
;
240 output
.push_back(MSGSTART
);
241 PushEscaped(output
, MSGCODE_START_BOOTLOADER
);
242 output
.push_back(MSGEND
);
246 m_controller
->AddLog(CEC_LOG_ERROR
, "could not start the bootloader");
249 m_controller
->AddLog(CEC_LOG_DEBUG
, "bootloader start command transmitted");
253 void CAdapterCommunication::PushEscaped(cec_adapter_message
&vec
, uint8_t byte
)
255 if (byte
>= MSGESC
&& byte
!= MSGSTART
)
257 vec
.push_back(MSGESC
);
258 vec
.push_back(byte
- ESCOFFSET
);
266 bool CAdapterCommunication::SetAckMask(uint16_t iMask
)
272 strLog
.Format("setting ackmask to %2x", iMask
);
273 m_controller
->AddLog(CEC_LOG_DEBUG
, strLog
.c_str());
275 cec_adapter_message output
;
278 output
.push_back(MSGSTART
);
279 PushEscaped(output
, MSGCODE_SET_ACK_MASK
);
280 PushEscaped(output
, iMask
>> 8);
281 PushEscaped(output
, (uint8_t)iMask
);
282 output
.push_back(MSGEND
);
286 m_controller
->AddLog(CEC_LOG_ERROR
, "could not set the ackmask");
293 bool CAdapterCommunication::PingAdapter(void)
298 m_controller
->AddLog(CEC_LOG_DEBUG
, "sending ping");
299 cec_adapter_message output
;
302 output
.push_back(MSGSTART
);
303 PushEscaped(output
, MSGCODE_PING
);
304 output
.push_back(MSGEND
);
308 m_controller
->AddLog(CEC_LOG_ERROR
, "could not send ping command");
312 m_controller
->AddLog(CEC_LOG_DEBUG
, "ping tranmitted");
314 // TODO check for pong
318 bool CAdapterCommunication::IsOpen(void) const
320 return !IsStopped() && m_port
->IsOpen();
323 void CAdapterCommunication::FormatAdapterMessage(const cec_command
&command
, cec_adapter_message
&packet
)
327 //set ack polarity to high when transmitting to the broadcast address
328 //set ack polarity low when transmitting to any other address
329 packet
.push_back(MSGSTART
);
330 PushEscaped(packet
, MSGCODE_TRANSMIT_ACK_POLARITY
);
331 if (command
.destination
== CECDEVICE_BROADCAST
)
332 PushEscaped(packet
, CEC_TRUE
);
334 PushEscaped(packet
, CEC_FALSE
);
335 packet
.push_back(MSGEND
);
337 // add source and destination
338 packet
.push_back(MSGSTART
);
339 PushEscaped(packet
, MSGCODE_TRANSMIT
);
340 packet
.push_back(((uint8_t)command
.initiator
<< 4) + (uint8_t)command
.destination
);
341 packet
.push_back(MSGEND
);
344 packet
.push_back(MSGSTART
);
345 PushEscaped(packet
, command
.parameters
.empty() ? (uint8_t)MSGCODE_TRANSMIT_EOM
: (uint8_t)MSGCODE_TRANSMIT
);
346 packet
.push_back((uint8_t) command
.opcode
);
347 packet
.push_back(MSGEND
);
350 for (int8_t iPtr
= 0; iPtr
< command
.parameters
.size
; iPtr
++)
352 packet
.push_back(MSGSTART
);
354 if (iPtr
== command
.parameters
.size
- 1)
355 PushEscaped(packet
, MSGCODE_TRANSMIT_EOM
);
357 PushEscaped(packet
, MSGCODE_TRANSMIT
);
359 PushEscaped(packet
, command
.parameters
[iPtr
]);
361 packet
.push_back(MSGEND
);