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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 LOK |
34 | |
35 | #include "LibCEC.h" | |
b9187cc6 | 36 | #include "platform/serialport.h" |
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37 | #include "util/StdString.h" |
38 | ||
39 | using namespace std; | |
40 | using namespace CEC; | |
41 | ||
2abe74eb LOK |
42 | CAdapterCommunication::CAdapterCommunication(CLibCEC *controller) : |
43 | m_controller(controller), | |
a8f0bd18 LOK |
44 | m_inbuf(NULL), |
45 | m_iInbufSize(0), | |
46 | m_iInbufUsed(0), | |
47 | m_bStarted(false), | |
48 | m_bStop(false) | |
49 | { | |
50 | m_port = new CSerialPort; | |
51 | } | |
52 | ||
828682d3 | 53 | CAdapterCommunication::~CAdapterCommunication(void) |
a8f0bd18 LOK |
54 | { |
55 | m_port->Close(); | |
56 | m_port = NULL; | |
57 | } | |
58 | ||
828682d3 | 59 | bool CAdapterCommunication::Open(const char *strPort, int iBaudRate /* = 38400 */, int iTimeoutMs /* = 10000 */) |
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60 | { |
61 | CLockObject lock(&m_commMutex); | |
62 | if (m_bStarted) | |
63 | return false; | |
64 | ||
65 | if (!m_port->Open(strPort, iBaudRate)) | |
66 | { | |
67 | CStdString strError; | |
68 | strError.Format("error opening serial port '%s': %s", strPort, m_port->GetError().c_str()); | |
2abe74eb | 69 | m_controller->AddLog(CEC_LOG_ERROR, strError); |
a8f0bd18 LOK |
70 | return false; |
71 | } | |
72 | ||
2abe74eb | 73 | m_controller->AddLog(CEC_LOG_DEBUG, "connection opened"); |
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74 | |
75 | //clear any input bytes | |
76 | uint8_t buff[1024]; | |
77 | m_port->Read(buff, sizeof(buff), 50); | |
78 | ||
79 | CCondition::Sleep(CEC_SETTLE_DOWN_TIME); | |
80 | ||
81 | m_bStop = false; | |
82 | m_bStarted = true; | |
828682d3 LOK |
83 | |
84 | if (CreateThread()) | |
a8f0bd18 | 85 | { |
2abe74eb | 86 | m_controller->AddLog(CEC_LOG_DEBUG, "reader thread created"); |
a8f0bd18 LOK |
87 | return true; |
88 | } | |
89 | else | |
90 | { | |
2abe74eb | 91 | m_controller->AddLog(CEC_LOG_DEBUG, "could not create a reader thread"); |
a8f0bd18 LOK |
92 | } |
93 | ||
94 | return false; | |
95 | } | |
96 | ||
828682d3 | 97 | void CAdapterCommunication::Close(void) |
a8f0bd18 | 98 | { |
828682d3 | 99 | StopThread(); |
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100 | m_port->Close(); |
101 | } | |
102 | ||
828682d3 | 103 | void *CAdapterCommunication::Process(void) |
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104 | { |
105 | while (!m_bStop) | |
106 | { | |
107 | if (!ReadFromDevice(250)) | |
108 | { | |
109 | m_bStarted = false; | |
110 | break; | |
111 | } | |
112 | ||
f7e6ba70 LOK |
113 | if (!m_bStop) |
114 | CCondition::Sleep(50); | |
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115 | } |
116 | ||
2abe74eb | 117 | m_controller->AddLog(CEC_LOG_DEBUG, "reader thread terminated"); |
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118 | |
119 | CLockObject lock(&m_commMutex); | |
120 | m_bStarted = false; | |
121 | return NULL; | |
122 | } | |
123 | ||
828682d3 | 124 | bool CAdapterCommunication::ReadFromDevice(int iTimeout) |
a8f0bd18 LOK |
125 | { |
126 | uint8_t buff[1024]; | |
127 | CLockObject lock(&m_commMutex); | |
128 | int iBytesRead = m_port->Read(buff, sizeof(buff), iTimeout); | |
129 | lock.Leave(); | |
130 | if (iBytesRead < 0) | |
131 | { | |
132 | CStdString strError; | |
133 | strError.Format("error reading from serial port: %s", m_port->GetError().c_str()); | |
2abe74eb | 134 | m_controller->AddLog(CEC_LOG_ERROR, strError); |
a8f0bd18 LOK |
135 | return false; |
136 | } | |
137 | else if (iBytesRead > 0) | |
138 | AddData(buff, iBytesRead); | |
139 | ||
140 | return true; | |
141 | } | |
142 | ||
828682d3 | 143 | void CAdapterCommunication::AddData(uint8_t *data, int iLen) |
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144 | { |
145 | CLockObject lock(&m_bufferMutex); | |
146 | if (iLen + m_iInbufUsed > m_iInbufSize) | |
147 | { | |
148 | m_iInbufSize = iLen + m_iInbufUsed; | |
149 | m_inbuf = (uint8_t*)realloc(m_inbuf, m_iInbufSize); | |
150 | } | |
151 | ||
152 | memcpy(m_inbuf + m_iInbufUsed, data, iLen); | |
153 | m_iInbufUsed += iLen; | |
154 | lock.Leave(); | |
155 | m_condition.Signal(); | |
156 | } | |
157 | ||
828682d3 | 158 | bool CAdapterCommunication::Write(const cec_frame &data) |
a8f0bd18 LOK |
159 | { |
160 | CLockObject lock(&m_commMutex); | |
161 | ||
162 | if (m_port->Write(data) != data.size()) | |
163 | { | |
164 | CStdString strError; | |
165 | strError.Format("error writing to serial port: %s", m_port->GetError().c_str()); | |
2abe74eb | 166 | m_controller->AddLog(CEC_LOG_ERROR, strError); |
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167 | return false; |
168 | } | |
169 | ||
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170 | m_controller->AddLog(CEC_LOG_DEBUG, "command sent"); |
171 | ||
172 | CCondition::Sleep((int) data.size() * 24 /*data*/ + 5 /*start bit (4.5 ms)*/ + 50 /* to be on the safe side */); | |
173 | ||
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174 | return true; |
175 | } | |
176 | ||
828682d3 | 177 | bool CAdapterCommunication::Read(cec_frame &msg, int iTimeout) |
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178 | { |
179 | CLockObject lock(&m_bufferMutex); | |
180 | ||
60fa4578 | 181 | if (m_iInbufUsed < 1) |
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182 | m_condition.Wait(&m_bufferMutex, iTimeout); |
183 | ||
184 | if (m_iInbufUsed < 1) | |
185 | return false; | |
186 | ||
187 | //search for first start of message | |
188 | int startpos = -1; | |
189 | for (int i = 0; i < m_iInbufUsed; i++) | |
190 | { | |
191 | if (m_inbuf[i] == MSGSTART) | |
192 | { | |
193 | startpos = i; | |
194 | break; | |
195 | } | |
196 | } | |
197 | ||
198 | if (startpos == -1) | |
199 | return false; | |
200 | ||
201 | //move anything from the first start of message to the beginning of the buffer | |
202 | if (startpos > 0) | |
203 | { | |
204 | memmove(m_inbuf, m_inbuf + startpos, m_iInbufUsed - startpos); | |
205 | m_iInbufUsed -= startpos; | |
206 | } | |
207 | ||
208 | if (m_iInbufUsed < 2) | |
209 | return false; | |
210 | ||
211 | //look for end of message | |
212 | startpos = -1; | |
213 | int endpos = -1; | |
214 | for (int i = 1; i < m_iInbufUsed; i++) | |
215 | { | |
216 | if (m_inbuf[i] == MSGEND) | |
217 | { | |
218 | endpos = i; | |
219 | break; | |
220 | } | |
221 | else if (m_inbuf[i] == MSGSTART) | |
222 | { | |
223 | startpos = i; | |
224 | break; | |
225 | } | |
226 | } | |
227 | ||
228 | if (startpos > 0) //we found a msgstart before msgend, this is not right, remove | |
229 | { | |
2abe74eb | 230 | m_controller->AddLog(CEC_LOG_ERROR, "received MSGSTART before MSGEND"); |
a8f0bd18 LOK |
231 | memmove(m_inbuf, m_inbuf + startpos, m_iInbufUsed - startpos); |
232 | m_iInbufUsed -= startpos; | |
233 | return false; | |
234 | } | |
235 | ||
236 | if (endpos > 0) //found a MSGEND | |
237 | { | |
238 | msg.clear(); | |
239 | bool isesc = false; | |
240 | for (int i = 1; i < endpos; i++) | |
241 | { | |
242 | if (isesc) | |
243 | { | |
244 | msg.push_back(m_inbuf[i] + (uint8_t)ESCOFFSET); | |
245 | isesc = false; | |
246 | } | |
247 | else if (m_inbuf[i] == MSGESC) | |
248 | { | |
249 | isesc = true; | |
250 | } | |
251 | else | |
252 | { | |
253 | msg.push_back(m_inbuf[i]); | |
254 | } | |
255 | } | |
256 | ||
257 | if (endpos + 1 < m_iInbufUsed) | |
258 | memmove(m_inbuf, m_inbuf + endpos + 1, m_iInbufUsed - endpos - 1); | |
259 | ||
260 | m_iInbufUsed -= endpos + 1; | |
261 | ||
262 | return true; | |
263 | } | |
264 | ||
265 | return false; | |
266 | } | |
267 | ||
828682d3 | 268 | std::string CAdapterCommunication::GetError(void) const |
a8f0bd18 LOK |
269 | { |
270 | return m_port->GetError(); | |
271 | } | |
2abe74eb LOK |
272 | |
273 | bool CAdapterCommunication::StartBootloader(void) | |
274 | { | |
275 | if (!IsRunning()) | |
276 | return false; | |
277 | ||
278 | m_controller->AddLog(CEC_LOG_DEBUG, "starting the bootloader"); | |
279 | cec_frame output; | |
280 | output.push_back(MSGSTART); | |
281 | PushEscaped(output, MSGCODE_START_BOOTLOADER); | |
282 | output.push_back(MSGEND); | |
283 | ||
284 | if (!Write(output)) | |
285 | { | |
286 | m_controller->AddLog(CEC_LOG_ERROR, "could not start the bootloader"); | |
287 | return false; | |
288 | } | |
289 | m_controller->AddLog(CEC_LOG_DEBUG, "bootloader start command transmitted"); | |
290 | return true; | |
291 | } | |
292 | ||
293 | void CAdapterCommunication::PushEscaped(cec_frame &vec, uint8_t byte) | |
294 | { | |
295 | if (byte >= MSGESC && byte != MSGSTART) | |
296 | { | |
297 | vec.push_back(MSGESC); | |
298 | vec.push_back(byte - ESCOFFSET); | |
299 | } | |
300 | else | |
301 | { | |
302 | vec.push_back(byte); | |
303 | } | |
304 | } | |
305 | ||
306 | bool CAdapterCommunication::SetAckMask(uint16_t iMask) | |
307 | { | |
308 | if (!IsRunning()) | |
309 | return false; | |
310 | ||
311 | CStdString strLog; | |
312 | strLog.Format("setting ackmask to %2x", iMask); | |
313 | m_controller->AddLog(CEC_LOG_DEBUG, strLog.c_str()); | |
314 | ||
315 | cec_frame output; | |
316 | ||
317 | output.push_back(MSGSTART); | |
318 | PushEscaped(output, MSGCODE_SET_ACK_MASK); | |
319 | PushEscaped(output, iMask >> 8); | |
320 | PushEscaped(output, (uint8_t)iMask); | |
321 | output.push_back(MSGEND); | |
322 | ||
323 | if (!Write(output)) | |
324 | { | |
325 | m_controller->AddLog(CEC_LOG_ERROR, "could not set the ackmask"); | |
326 | return false; | |
327 | } | |
328 | ||
329 | return true; | |
330 | } | |
331 | ||
332 | bool CAdapterCommunication::PingAdapter(void) | |
333 | { | |
334 | if (!IsRunning()) | |
335 | return false; | |
336 | ||
337 | m_controller->AddLog(CEC_LOG_DEBUG, "sending ping"); | |
338 | cec_frame output; | |
339 | output.push_back(MSGSTART); | |
340 | PushEscaped(output, MSGCODE_PING); | |
341 | output.push_back(MSGEND); | |
342 | ||
343 | if (!Write(output)) | |
344 | { | |
345 | m_controller->AddLog(CEC_LOG_ERROR, "could not send ping command"); | |
346 | return false; | |
347 | } | |
348 | ||
349 | m_controller->AddLog(CEC_LOG_DEBUG, "ping tranmitted"); | |
350 | ||
351 | // TODO check for pong | |
352 | return true; | |
353 | } |