fc650f0651f82a986dd2cfe7df730d47dfa4b033
[deb_libcec.git] / src / lib / AdapterCommunication.cpp
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
47 //set ack polarity to high when transmitting to the broadcast address
48 //set ack polarity low when transmitting to any other address
49 push_back(MSGSTART);
50 push_escaped(MSGCODE_TRANSMIT_ACK_POLARITY);
51 if (command.destination == CECDEVICE_BROADCAST)
52 push_escaped(CEC_TRUE);
53 else
54 push_escaped(CEC_FALSE);
55 push_back(MSGEND);
56
57 // add source and destination
58 push_back(MSGSTART);
59 push_escaped(command.opcode_set == 0 ? (uint8_t)MSGCODE_TRANSMIT_EOM : (uint8_t)MSGCODE_TRANSMIT);
60 push_back(((uint8_t)command.initiator << 4) + (uint8_t)command.destination);
61 push_back(MSGEND);
62
63 // add opcode
64 if (command.opcode_set == 1)
65 {
66 push_back(MSGSTART);
67 push_escaped(command.parameters.IsEmpty() ? (uint8_t)MSGCODE_TRANSMIT_EOM : (uint8_t)MSGCODE_TRANSMIT);
68 push_back((uint8_t) command.opcode);
69 push_back(MSGEND);
70
71 // add parameters
72 for (int8_t iPtr = 0; iPtr < command.parameters.size; iPtr++)
73 {
74 push_back(MSGSTART);
75
76 if (iPtr == command.parameters.size - 1)
77 push_escaped( MSGCODE_TRANSMIT_EOM);
78 else
79 push_escaped(MSGCODE_TRANSMIT);
80
81 push_escaped(command.parameters[iPtr]);
82
83 push_back(MSGEND);
84 }
85 }
86
87 // set timeout
88 transmit_timeout = command.transmit_timeout;
89 }
90
91 CCECAdapterMessage &CCECAdapterMessage::operator =(const CCECAdapterMessage &msg)
92 {
93 packet = msg.packet;
94 state = msg.state;
95 return *this;
96 }
97
98 CStdString CCECAdapterMessage::MessageCodeAsString(void) const
99 {
100 CStdString strMsg;
101 switch (message())
102 {
103 case MSGCODE_NOTHING:
104 strMsg = "NOTHING";
105 break;
106 case MSGCODE_PING:
107 strMsg = "PING";
108 break;
109 case MSGCODE_TIMEOUT_ERROR:
110 strMsg = "TIMEOUT";
111 break;
112 case MSGCODE_HIGH_ERROR:
113 strMsg = "HIGH_ERROR";
114 break;
115 case MSGCODE_LOW_ERROR:
116 strMsg = "LOW_ERROR";
117 break;
118 case MSGCODE_FRAME_START:
119 strMsg = "FRAME_START";
120 break;
121 case MSGCODE_FRAME_DATA:
122 strMsg = "FRAME_DATA";
123 break;
124 case MSGCODE_RECEIVE_FAILED:
125 strMsg = "RECEIVE_FAILED";
126 break;
127 case MSGCODE_COMMAND_ACCEPTED:
128 strMsg = "COMMAND_ACCEPTED";
129 break;
130 case MSGCODE_COMMAND_REJECTED:
131 strMsg = "COMMAND_REJECTED";
132 break;
133 case MSGCODE_SET_ACK_MASK:
134 strMsg = "SET_ACK_MASK";
135 break;
136 case MSGCODE_TRANSMIT:
137 strMsg = "TRANSMIT";
138 break;
139 case MSGCODE_TRANSMIT_EOM:
140 strMsg = "TRANSMIT_EOM";
141 break;
142 case MSGCODE_TRANSMIT_IDLETIME:
143 strMsg = "TRANSMIT_IDLETIME";
144 break;
145 case MSGCODE_TRANSMIT_ACK_POLARITY:
146 strMsg = "TRANSMIT_ACK_POLARITY";
147 break;
148 case MSGCODE_TRANSMIT_LINE_TIMEOUT:
149 strMsg = "TRANSMIT_LINE_TIMEOUT";
150 break;
151 case MSGCODE_TRANSMIT_SUCCEEDED:
152 strMsg = "TRANSMIT_SUCCEEDED";
153 break;
154 case MSGCODE_TRANSMIT_FAILED_LINE:
155 strMsg = "TRANSMIT_FAILED_LINE";
156 break;
157 case MSGCODE_TRANSMIT_FAILED_ACK:
158 strMsg = "TRANSMIT_FAILED_ACK";
159 break;
160 case MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA:
161 strMsg = "TRANSMIT_FAILED_TIMEOUT_DATA";
162 break;
163 case MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE:
164 strMsg = "TRANSMIT_FAILED_TIMEOUT_LINE";
165 break;
166 case MSGCODE_FIRMWARE_VERSION:
167 strMsg = "FIRMWARE_VERSION";
168 break;
169 case MSGCODE_START_BOOTLOADER:
170 strMsg = "START_BOOTLOADER";
171 break;
172 case MSGCODE_FRAME_EOM:
173 strMsg = "FRAME_EOM";
174 break;
175 case MSGCODE_FRAME_ACK:
176 strMsg = "FRAME_ACK";
177 break;
178 }
179
180 return strMsg;
181 }
182
183 CStdString CCECAdapterMessage::ToString(void) const
184 {
185 CStdString strMsg;
186 if (size() == 0)
187 {
188 strMsg = "empty message";
189 }
190 else
191 {
192 strMsg = MessageCodeAsString();
193
194 switch (message())
195 {
196 case MSGCODE_TIMEOUT_ERROR:
197 case MSGCODE_HIGH_ERROR:
198 case MSGCODE_LOW_ERROR:
199 {
200 int iLine = (size() >= 3) ? (at(1) << 8) | at(2) : 0;
201 uint32_t iTime = (size() >= 7) ? (at(3) << 24) | (at(4) << 16) | (at(5) << 8) | at(6) : 0;
202 strMsg.AppendFormat(" line:%i", iLine);
203 strMsg.AppendFormat(" time:%u", iTime);
204 }
205 break;
206 case MSGCODE_FRAME_START:
207 if (size() >= 2)
208 strMsg.AppendFormat(" initiator:%1x destination:%1x ack:%s %s", initiator(), destination(), ack() ? "high" : "low", eom() ? "eom" : "");
209 break;
210 case MSGCODE_FRAME_DATA:
211 if (size() >= 2)
212 strMsg.AppendFormat(" %02x %s", at(1), eom() ? "eom" : "");
213 break;
214 default:
215 break;
216 }
217 }
218
219 return strMsg;
220 }
221
222 bool CCECAdapterMessage::is_error(void) const
223 {
224 cec_adapter_messagecode code = message();
225 return (code == MSGCODE_HIGH_ERROR ||
226 code == MSGCODE_LOW_ERROR ||
227 code == MSGCODE_RECEIVE_FAILED ||
228 code == MSGCODE_COMMAND_REJECTED ||
229 code == MSGCODE_TRANSMIT_LINE_TIMEOUT ||
230 code == MSGCODE_TRANSMIT_FAILED_LINE ||
231 code == MSGCODE_TRANSMIT_FAILED_ACK ||
232 code == MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA ||
233 code == MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE);
234 }
235
236 void CCECAdapterMessage::push_escaped(uint8_t byte)
237 {
238 if (byte >= MSGESC)
239 {
240 push_back(MSGESC);
241 push_back(byte - ESCOFFSET);
242 }
243 else
244 push_back(byte);
245 }
246
247 CAdapterCommunication::CAdapterCommunication(CCECProcessor *processor) :
248 m_port(NULL),
249 m_processor(processor)
250 {
251 m_port = new CSerialPort;
252 }
253
254 CAdapterCommunication::~CAdapterCommunication(void)
255 {
256 Close();
257
258 if (m_port)
259 {
260 delete m_port;
261 m_port = NULL;
262 }
263 }
264
265 bool CAdapterCommunication::Open(const char *strPort, uint16_t iBaudRate /* = 38400 */, uint32_t iTimeoutMs /* = 10000 */)
266 {
267 CLockObject lock(&m_mutex);
268 if (!m_port)
269 {
270 m_processor->AddLog(CEC_LOG_ERROR, "port is NULL");
271 return false;
272 }
273
274 if (IsOpen())
275 {
276 m_processor->AddLog(CEC_LOG_ERROR, "port is already open");
277 }
278
279 if (!m_port->Open(strPort, iBaudRate))
280 {
281 CStdString strError;
282 strError.Format("error opening serial port '%s': %s", strPort, m_port->GetError().c_str());
283 m_processor->AddLog(CEC_LOG_ERROR, strError);
284 return false;
285 }
286
287 m_processor->AddLog(CEC_LOG_DEBUG, "connection opened");
288
289 //clear any input bytes
290 uint8_t buff[1024];
291 while (m_port->Read(buff, sizeof(buff), 500) > 0) {}
292
293 if (CreateThread())
294 {
295 m_startCondition.Wait(&m_mutex);
296 m_processor->AddLog(CEC_LOG_DEBUG, "communication thread started");
297 return true;
298 }
299 else
300 {
301 m_processor->AddLog(CEC_LOG_DEBUG, "could not create a communication thread");
302 }
303
304 return false;
305 }
306
307 void CAdapterCommunication::Close(void)
308 {
309 CLockObject lock(&m_mutex);
310 m_startCondition.Broadcast();
311 m_rcvCondition.Broadcast();
312 StopThread();
313 }
314
315 void *CAdapterCommunication::Process(void)
316 {
317 {
318 CLockObject lock(&m_mutex);
319 m_startCondition.Signal();
320 }
321
322 while (!IsStopped())
323 {
324 ReadFromDevice(500);
325 Sleep(5);
326 WriteNextCommand();
327 }
328
329 return NULL;
330 }
331
332 bool CAdapterCommunication::ReadFromDevice(uint32_t iTimeout)
333 {
334 int32_t iBytesRead;
335 uint8_t buff[1024];
336 if (!m_port)
337 return false;
338
339 iBytesRead = m_port->Read(buff, sizeof(buff), iTimeout);
340 if (iBytesRead < 0 || iBytesRead > 256)
341 {
342 CStdString strError;
343 strError.Format("error reading from serial port: %s", m_port->GetError().c_str());
344 m_processor->AddLog(CEC_LOG_ERROR, strError);
345 return false;
346 }
347 else if (iBytesRead > 0)
348 AddData(buff, (uint8_t) iBytesRead);
349
350 return iBytesRead > 0;
351 }
352
353 void CAdapterCommunication::AddData(uint8_t *data, uint8_t iLen)
354 {
355 CLockObject lock(&m_mutex);
356 for (unsigned int iPtr = 0; iPtr < iLen; iPtr++)
357 m_inBuffer.Push(data[iPtr]);
358
359 m_rcvCondition.Signal();
360 }
361
362 void CAdapterCommunication::WriteNextCommand(void)
363 {
364 CCECAdapterMessage *msg;
365 if (m_outBuffer.Pop(msg))
366 SendMessageToAdapter(msg);
367 }
368
369 void CAdapterCommunication::SendMessageToAdapter(CCECAdapterMessage *msg)
370 {
371 CLockObject lock(&msg->mutex);
372 if (m_port->Write(msg) != (int32_t) msg->size())
373 {
374 CStdString strError;
375 strError.Format("error writing to serial port: %s", m_port->GetError().c_str());
376 m_processor->AddLog(CEC_LOG_ERROR, strError);
377 msg->state = ADAPTER_MESSAGE_STATE_ERROR;
378 }
379 else
380 {
381 m_processor->AddLog(CEC_LOG_DEBUG, "command sent");
382 msg->state = ADAPTER_MESSAGE_STATE_SENT;
383 }
384 msg->condition.Signal();
385 }
386
387 bool CAdapterCommunication::Write(CCECAdapterMessage *data)
388 {
389 data->state = ADAPTER_MESSAGE_STATE_WAITING;
390 m_outBuffer.Push(data);
391 return true;
392 }
393
394 bool CAdapterCommunication::Read(CCECAdapterMessage &msg, uint32_t iTimeout)
395 {
396 CLockObject lock(&m_mutex);
397
398 msg.clear();
399 uint64_t iNow = GetTimeMs();
400 uint64_t iTarget = iNow + iTimeout;
401 bool bGotFullMessage(false);
402 bool bNextIsEscaped(false);
403 bool bGotStart(false);
404
405 while(!bGotFullMessage && iNow < iTarget)
406 {
407 uint8_t buf = 0;
408 if (!m_inBuffer.Pop(buf))
409 {
410 if (!m_rcvCondition.Wait(&m_mutex, (uint32_t) (iTarget - iNow)))
411 return false;
412 }
413
414 if (!bGotStart)
415 {
416 if (buf == MSGSTART)
417 bGotStart = true;
418 continue;
419 }
420 else if (buf == MSGSTART) //we found a msgstart before msgend, this is not right, remove
421 {
422 if (msg.size() > 0)
423 m_processor->AddLog(CEC_LOG_WARNING, "received MSGSTART before MSGEND, removing previous buffer contents");
424 msg.clear();
425 bGotStart = true;
426 }
427
428 if (buf == MSGEND)
429 {
430 bGotFullMessage = true;
431 }
432 else if (bNextIsEscaped)
433 {
434 msg.push_back(buf + (uint8_t)ESCOFFSET);
435 bNextIsEscaped = false;
436 }
437 else if (buf == MSGESC)
438 bNextIsEscaped = true;
439 else
440 msg.push_back(buf);
441 }
442
443 if (bGotFullMessage)
444 msg.state = ADAPTER_MESSAGE_STATE_RECEIVED;
445
446 return bGotFullMessage;
447 }
448
449 std::string CAdapterCommunication::GetError(void) const
450 {
451 return m_port->GetError();
452 }
453
454 bool CAdapterCommunication::StartBootloader(void)
455 {
456 bool bReturn(false);
457 if (!IsRunning())
458 return bReturn;
459
460 m_processor->AddLog(CEC_LOG_DEBUG, "starting the bootloader");
461 CCECAdapterMessage *output = new CCECAdapterMessage;
462
463 output->push_back(MSGSTART);
464 output->push_escaped(MSGCODE_START_BOOTLOADER);
465 output->push_back(MSGEND);
466
467 CLockObject lock(&output->mutex);
468 if (Write(output))
469 output->condition.Wait(&output->mutex);
470 bReturn = output->state == ADAPTER_MESSAGE_STATE_SENT;
471 delete output;
472
473 return bReturn;
474 }
475
476 bool CAdapterCommunication::PingAdapter(void)
477 {
478 bool bReturn(false);
479 if (!IsRunning())
480 return bReturn;
481
482 m_processor->AddLog(CEC_LOG_DEBUG, "sending ping");
483 CCECAdapterMessage *output = new CCECAdapterMessage;
484
485 output->push_back(MSGSTART);
486 output->push_escaped(MSGCODE_PING);
487 output->push_back(MSGEND);
488
489 CLockObject lock(&output->mutex);
490 if (Write(output))
491 output->condition.Wait(&output->mutex);
492 bReturn = output->state == ADAPTER_MESSAGE_STATE_SENT;
493 delete output;
494
495 return bReturn;
496 }
497
498 bool CAdapterCommunication::IsOpen(void) const
499 {
500 return !IsStopped() && m_port->IsOpen() && IsRunning();
501 }