cec: don't try to do anything before the processor thread has started
[deb_libcec.git] / src / lib / AdapterCommunication.cpp
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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
828682d3 33#include "AdapterCommunication.h"
2abe74eb 34
1113cb7d 35#include "CECProcessor.h"
b9187cc6 36#include "platform/serialport.h"
a8f0bd18 37#include "util/StdString.h"
50aa01e6 38#include "platform/timeutils.h"
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39
40using namespace std;
41using namespace CEC;
42
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43CCECAdapterMessage::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);
57f45e6c 59 push_escaped(command.opcode_set == 0 ? (uint8_t)MSGCODE_TRANSMIT_EOM : (uint8_t)MSGCODE_TRANSMIT);
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60 push_back(((uint8_t)command.initiator << 4) + (uint8_t)command.destination);
61 push_back(MSGEND);
62
63 // add opcode
57f45e6c 64 if (command.opcode_set == 1)
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65 {
66 push_back(MSGSTART);
ab1469a0 67 push_escaped(command.parameters.IsEmpty() ? (uint8_t)MSGCODE_TRANSMIT_EOM : (uint8_t)MSGCODE_TRANSMIT);
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68 push_back((uint8_t) command.opcode);
69 push_back(MSGEND);
ad24cbaf 70
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71 // add parameters
72 for (int8_t iPtr = 0; iPtr < command.parameters.size; iPtr++)
73 {
74 push_back(MSGSTART);
ad24cbaf 75
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76 if (iPtr == command.parameters.size - 1)
77 push_escaped( MSGCODE_TRANSMIT_EOM);
78 else
79 push_escaped(MSGCODE_TRANSMIT);
ad24cbaf 80
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81 push_escaped(command.parameters[iPtr]);
82
83 push_back(MSGEND);
84 }
ad24cbaf 85 }
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86
87 // set timeout
88 transmit_timeout = command.transmit_timeout;
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89}
90
91CCECAdapterMessage &CCECAdapterMessage::operator =(const CCECAdapterMessage &msg)
92{
93 packet = msg.packet;
88c43521 94 state = msg.state;
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95 return *this;
96}
97
b8c91906 98CStdString CCECAdapterMessage::MessageCodeAsString(void) const
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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:
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110 strMsg = "TIMEOUT";
111 break;
e41b06f9 112 case MSGCODE_HIGH_ERROR:
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113 strMsg = "HIGH_ERROR";
114 break;
e41b06f9 115 case MSGCODE_LOW_ERROR:
b8c91906 116 strMsg = "LOW_ERROR";
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117 break;
118 case MSGCODE_FRAME_START:
119 strMsg = "FRAME_START";
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120 break;
121 case MSGCODE_FRAME_DATA:
122 strMsg = "FRAME_DATA";
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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
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183CStdString CCECAdapterMessage::ToString(void) const
184{
185 CStdString strMsg;
fd5e333a 186 if (size() == 0)
b8c91906 187 {
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188 strMsg = "empty message";
189 }
190 else
191 {
192 strMsg = MessageCodeAsString();
193
194 switch (message())
b8c91906 195 {
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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;
b8c91906 216 }
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217 }
218
219 return strMsg;
220}
221
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222bool CCECAdapterMessage::is_error(void) const
223{
224 cec_adapter_messagecode code = message();
855a3a98 225 return (code == MSGCODE_HIGH_ERROR ||
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226 code == MSGCODE_LOW_ERROR ||
227 code == MSGCODE_RECEIVE_FAILED ||
228 code == MSGCODE_COMMAND_REJECTED ||
ae693aaa 229 code == MSGCODE_TRANSMIT_LINE_TIMEOUT ||
e41b06f9 230 code == MSGCODE_TRANSMIT_FAILED_LINE ||
ae693aaa 231 code == MSGCODE_TRANSMIT_FAILED_ACK ||
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232 code == MSGCODE_TRANSMIT_FAILED_TIMEOUT_DATA ||
233 code == MSGCODE_TRANSMIT_FAILED_TIMEOUT_LINE);
234}
235
c7903c02 236void CCECAdapterMessage::push_escaped(uint8_t byte)
ad24cbaf 237{
a96eb42e 238 if (byte >= MSGESC)
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239 {
240 push_back(MSGESC);
c7903c02 241 push_back(byte - ESCOFFSET);
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242 }
243 else
c7903c02 244 push_back(byte);
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245}
246
1113cb7d 247CAdapterCommunication::CAdapterCommunication(CCECProcessor *processor) :
12027dbe 248 m_port(NULL),
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249 m_processor(processor),
250 m_iLineTimeout(0)
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251{
252 m_port = new CSerialPort;
253}
254
828682d3 255CAdapterCommunication::~CAdapterCommunication(void)
a8f0bd18 256{
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257 Close();
258
259 if (m_port)
260 {
261 delete m_port;
262 m_port = NULL;
263 }
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264}
265
25701fa6 266bool CAdapterCommunication::Open(const char *strPort, uint16_t iBaudRate /* = 38400 */, uint32_t iTimeoutMs /* = 10000 */)
a8f0bd18 267{
f077e8ed 268 CLockObject lock(&m_mutex);
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269 if (!m_port)
270 {
1113cb7d 271 m_processor->AddLog(CEC_LOG_ERROR, "port is NULL");
a8f0bd18 272 return false;
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273 }
274
275 if (IsOpen())
276 {
1113cb7d 277 m_processor->AddLog(CEC_LOG_ERROR, "port is already open");
13fd6a66 278 }
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279
280 if (!m_port->Open(strPort, iBaudRate))
281 {
282 CStdString strError;
283 strError.Format("error opening serial port '%s': %s", strPort, m_port->GetError().c_str());
1113cb7d 284 m_processor->AddLog(CEC_LOG_ERROR, strError);
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285 return false;
286 }
287
1113cb7d 288 m_processor->AddLog(CEC_LOG_DEBUG, "connection opened");
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289
290 //clear any input bytes
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291 uint8_t buff[1];
292 while (m_port->Read(buff, 1, 5) == 1) {}
a8f0bd18 293
828682d3 294 if (CreateThread())
a8f0bd18 295 {
b9eea66d 296 m_startCondition.Wait(&m_mutex);
1113cb7d 297 m_processor->AddLog(CEC_LOG_DEBUG, "communication thread started");
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298 return true;
299 }
300 else
301 {
1113cb7d 302 m_processor->AddLog(CEC_LOG_DEBUG, "could not create a communication thread");
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303 }
304
305 return false;
306}
307
828682d3 308void CAdapterCommunication::Close(void)
a8f0bd18 309{
f077e8ed 310 CLockObject lock(&m_mutex);
b9eea66d 311 m_startCondition.Broadcast();
d5bffd3c 312 m_rcvCondition.Broadcast();
b9eea66d 313 StopThread();
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314}
315
828682d3 316void *CAdapterCommunication::Process(void)
a8f0bd18 317{
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318 {
319 CLockObject lock(&m_mutex);
320 m_startCondition.Signal();
321 }
12027dbe 322
13fd6a66 323 while (!IsStopped())
a8f0bd18 324 {
9e1cfa5c 325 ReadFromDevice(50);
c02980af 326 Sleep(5);
3c53ac93 327 WriteNextCommand();
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328 }
329
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330 CCECAdapterMessage *msg;
331 if (m_outBuffer.Pop(msg))
332 msg->condition.Broadcast();
333
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334 return NULL;
335}
336
25701fa6 337bool CAdapterCommunication::ReadFromDevice(uint32_t iTimeout)
a8f0bd18 338{
25701fa6 339 int32_t iBytesRead;
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340 uint8_t buff[1024];
341 if (!m_port)
342 return false;
b6c82769 343
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344 iBytesRead = m_port->Read(buff, sizeof(buff), iTimeout);
345 if (iBytesRead < 0 || iBytesRead > 256)
a8f0bd18 346 {
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347 CStdString strError;
348 strError.Format("error reading from serial port: %s", m_port->GetError().c_str());
1113cb7d 349 m_processor->AddLog(CEC_LOG_ERROR, strError);
13fd6a66 350 return false;
a8f0bd18 351 }
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352 else if (iBytesRead > 0)
353 AddData(buff, (uint8_t) iBytesRead);
25701fa6 354
13fd6a66 355 return iBytesRead > 0;
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356}
357
8bca69de 358void CAdapterCommunication::AddData(uint8_t *data, uint8_t iLen)
a8f0bd18 359{
f077e8ed 360 CLockObject lock(&m_mutex);
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361 for (unsigned int iPtr = 0; iPtr < iLen; iPtr++)
362 m_inBuffer.Push(data[iPtr]);
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363
364 m_rcvCondition.Signal();
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365}
366
3c53ac93 367void CAdapterCommunication::WriteNextCommand(void)
a8f0bd18 368{
28352a04 369 CCECAdapterMessage *msg;
3c53ac93 370 if (m_outBuffer.Pop(msg))
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371 SendMessageToAdapter(msg);
372}
373
374void CAdapterCommunication::SendMessageToAdapter(CCECAdapterMessage *msg)
375{
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376 CLockObject lock(&msg->mutex);
377 if (m_port->Write(msg) != (int32_t) msg->size())
a8f0bd18 378 {
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379 CStdString strError;
380 strError.Format("error writing to serial port: %s", m_port->GetError().c_str());
1113cb7d 381 m_processor->AddLog(CEC_LOG_ERROR, strError);
a96eb42e 382 msg->state = ADAPTER_MESSAGE_STATE_ERROR;
25701fa6 383 }
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384 else
385 {
1113cb7d 386 m_processor->AddLog(CEC_LOG_DEBUG, "command sent");
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387 msg->state = ADAPTER_MESSAGE_STATE_SENT;
388 }
389 msg->condition.Signal();
3c53ac93 390}
2abe74eb 391
28352a04 392bool CAdapterCommunication::Write(CCECAdapterMessage *data)
3c53ac93 393{
0e31a62c 394 data->state = ADAPTER_MESSAGE_STATE_WAITING;
3c53ac93 395 m_outBuffer.Push(data);
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396 return true;
397}
398
220537f2 399bool CAdapterCommunication::Read(CCECAdapterMessage &msg, uint32_t iTimeout)
a8f0bd18 400{
f077e8ed 401 CLockObject lock(&m_mutex);
a8f0bd18 402
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403 msg.clear();
404 uint64_t iNow = GetTimeMs();
405 uint64_t iTarget = iNow + iTimeout;
406 bool bGotFullMessage(false);
407 bool bNextIsEscaped(false);
408 bool bGotStart(false);
a8f0bd18 409
50aa01e6 410 while(!bGotFullMessage && iNow < iTarget)
a8f0bd18 411 {
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412 uint8_t buf = 0;
413 if (!m_inBuffer.Pop(buf))
a8f0bd18 414 {
56701628 415 if (!m_rcvCondition.Wait(&m_mutex, (uint32_t) (iTarget - iNow)))
50aa01e6 416 return false;
a8f0bd18 417 }
a8f0bd18 418
50aa01e6 419 if (!bGotStart)
a8f0bd18 420 {
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421 if (buf == MSGSTART)
422 bGotStart = true;
423 continue;
a8f0bd18 424 }
50aa01e6 425 else if (buf == MSGSTART) //we found a msgstart before msgend, this is not right, remove
a8f0bd18 426 {
855a3a98 427 if (msg.size() > 0)
1113cb7d 428 m_processor->AddLog(CEC_LOG_WARNING, "received MSGSTART before MSGEND, removing previous buffer contents");
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429 msg.clear();
430 bGotStart = true;
a8f0bd18 431 }
a8f0bd18 432
50aa01e6 433 if (buf == MSGEND)
a8f0bd18 434 {
50aa01e6 435 bGotFullMessage = true;
a8f0bd18 436 }
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437 else if (bNextIsEscaped)
438 {
439 msg.push_back(buf + (uint8_t)ESCOFFSET);
440 bNextIsEscaped = false;
441 }
442 else if (buf == MSGESC)
443 bNextIsEscaped = true;
444 else
445 msg.push_back(buf);
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446 }
447
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448 if (bGotFullMessage)
449 msg.state = ADAPTER_MESSAGE_STATE_RECEIVED;
450
50aa01e6 451 return bGotFullMessage;
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452}
453
828682d3 454std::string CAdapterCommunication::GetError(void) const
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455{
456 return m_port->GetError();
457}
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458
459bool CAdapterCommunication::StartBootloader(void)
460{
28352a04 461 bool bReturn(false);
2abe74eb 462 if (!IsRunning())
28352a04 463 return bReturn;
2abe74eb 464
1113cb7d 465 m_processor->AddLog(CEC_LOG_DEBUG, "starting the bootloader");
28352a04 466 CCECAdapterMessage *output = new CCECAdapterMessage;
25701fa6 467
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468 output->push_back(MSGSTART);
469 output->push_escaped(MSGCODE_START_BOOTLOADER);
470 output->push_back(MSGEND);
2abe74eb 471
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472 CLockObject lock(&output->mutex);
473 if (Write(output))
474 output->condition.Wait(&output->mutex);
a96eb42e 475 bReturn = output->state == ADAPTER_MESSAGE_STATE_SENT;
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476 delete output;
477
478 return bReturn;
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479}
480
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481bool CAdapterCommunication::PingAdapter(void)
482{
28352a04 483 bool bReturn(false);
2abe74eb 484 if (!IsRunning())
28352a04 485 return bReturn;
2abe74eb 486
1113cb7d 487 m_processor->AddLog(CEC_LOG_DEBUG, "sending ping");
28352a04 488 CCECAdapterMessage *output = new CCECAdapterMessage;
25701fa6 489
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490 output->push_back(MSGSTART);
491 output->push_escaped(MSGCODE_PING);
492 output->push_back(MSGEND);
2abe74eb 493
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494 CLockObject lock(&output->mutex);
495 if (Write(output))
496 output->condition.Wait(&output->mutex);
a96eb42e 497 bReturn = output->state == ADAPTER_MESSAGE_STATE_SENT;
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498 delete output;
499
500 return bReturn;
2abe74eb 501}
13fd6a66 502
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503bool CAdapterCommunication::SetLineTimeout(uint8_t iTimeout)
504{
505 bool bReturn(m_iLineTimeout != iTimeout);
506
507 if (!bReturn)
508 {
509 CCECAdapterMessage *output = new CCECAdapterMessage;
510
511 output->push_back(MSGSTART);
512 output->push_escaped(MSGCODE_TRANSMIT_IDLETIME);
513 output->push_escaped(iTimeout);
514 output->push_back(MSGEND);
515
516 if ((bReturn = Write(output)) == false)
517 m_processor->AddLog(CEC_LOG_ERROR, "could not set the idletime");
518 delete output;
519 }
520
521 return bReturn;
522}
523
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524bool CAdapterCommunication::IsOpen(void) const
525{
b9eea66d 526 return !IsStopped() && m_port->IsOpen() && IsRunning();
13fd6a66 527}