2 * Copyright (C) 2015, 2016 "IoT.bzh"
3 * Author "Romain Forlot" <romain.forlot@iot.bzh>
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
19 #include <sys/socket.h>
20 #include <json-c/json.h>
21 #include <linux/can/raw.h>
28 #include "can-bus.hpp"
30 #include "can-signals.hpp"
31 #include "can-decoder.hpp"
32 #include "../binding/configuration.hpp"
33 #include "../utils/signals.hpp"
34 #include "../utils/openxc-utils.hpp"
38 #include <afb/afb-binding.h>
41 /// @brief Class constructor
43 /// @param[in] conf_file - handle to the json configuration file.
44 can_bus_t::can_bus_t(utils::config_parser_t conf_file)
45 : conf_file_{conf_file}
48 std::map<std::string, std::shared_ptr<can_bus_dev_t>> can_bus_t::can_devices_;
50 /// @brief Will make the decoding operation on a classic CAN message. It will not
51 /// handle CAN commands nor diagnostic messages that have their own method to get
54 /// It will add to the vehicle_message queue the decoded message and tell the event push
55 /// thread to process it.
57 /// @param[in] can_message - a single CAN message from the CAN socket read, to be decode.
59 /// @return How many signals has been decoded.
60 int can_bus_t::process_can_signals(const can_message_t& can_message)
62 int processed_signals = 0;
63 struct utils::signals_found signals;
64 openxc_DynamicField search_key, decoded_message;
65 openxc_VehicleMessage vehicle_message;
66 configuration_t& conf = configuration_t::instance();
67 utils::signals_manager_t& sm = utils::signals_manager_t::instance();
69 // First we have to found which can_signal_t it is
70 search_key = build_DynamicField((double)can_message.get_id());
71 signals = sm.find_signals(search_key);
73 // Decoding the message ! Don't kill the messenger !
74 for(const auto& sig : signals.can_signals)
76 std::lock_guard<std::mutex> subscribed_signals_lock(sm.get_subscribed_signals_mutex());
77 std::map<std::string, struct afb_event>& s = sm.get_subscribed_signals();
79 if( s.find(sig->get_name()) != s.end() && afb_event_is_valid(s[sig->get_name()]))
82 decoded_message = decoder_t::translateSignal(*sig, can_message, conf.get_can_signals(), &send);
86 openxc_SimpleMessage s_message = build_SimpleMessage(sig->get_name(), decoded_message);
87 vehicle_message = build_VehicleMessage(s_message);
89 std::lock_guard<std::mutex> decoded_can_message_lock(decoded_can_message_mutex_);
90 push_new_vehicle_message(vehicle_message);
96 DEBUG(binder_interface, "%s: %d/%d CAN signals processed.", __FUNCTION__, processed_signals, (int)signals.can_signals.size());
97 return processed_signals;
100 /// @brief Will make the decoding operation on a diagnostic CAN message.Then it find the subscribed signal
101 /// corresponding and will add the vehicle_message to the queue of event to pushed before notifying
102 /// the event push thread to process it.
104 /// @param[in] manager - the diagnostic manager object that handle diagnostic communication
105 /// @param[in] can_message - a single CAN message from the CAN socket read, to be decode.
107 /// @return How many signals has been decoded.
108 int can_bus_t::process_diagnostic_signals(diagnostic_manager_t& manager, const can_message_t& can_message)
110 int processed_signals = 0;
112 utils::signals_manager_t& sm = utils::signals_manager_t::instance();
114 std::lock_guard<std::mutex> subscribed_signals_lock(sm.get_subscribed_signals_mutex());
115 std::map<std::string, struct afb_event>& s = sm.get_subscribed_signals();
117 openxc_VehicleMessage vehicle_message = manager.find_and_decode_adr(can_message);
118 if( (vehicle_message.has_simple_message && vehicle_message.simple_message.has_name) &&
119 (s.find(vehicle_message.simple_message.name) != s.end() && afb_event_is_valid(s[vehicle_message.simple_message.name])))
121 std::lock_guard<std::mutex> decoded_can_message_lock(decoded_can_message_mutex_);
122 push_new_vehicle_message(vehicle_message);
126 return processed_signals;
129 /// @brief thread to decoding raw CAN messages.
131 /// Depending on the nature of message, if arbitration ID matches ID for a diagnostic response
132 /// then decoding a diagnostic message else use classic CAN signals decoding functions.
134 /// It will take from the can_message_q_ queue the next can message to process then it search
135 /// about signal subscribed if there is a valid afb_event for it. We only decode signal for which a
136 /// subscription has been made. Can message will be decoded using translateSignal that will pass it to the
137 /// corresponding decoding function if there is one assigned for that signal. If not, it will be the default
138 /// noopDecoder function that will operate on it.
140 /// TODO: make diagnostic messages parsing optionnal.
141 void can_bus_t::can_decode_message()
143 can_message_t can_message;
148 std::unique_lock<std::mutex> can_message_lock(can_message_mutex_);
149 new_can_message_cv_.wait(can_message_lock);
150 while(!can_message_q_.empty())
152 can_message = next_can_message();
154 if(configuration_t::instance().get_diagnostic_manager().is_diagnostic_response(can_message))
155 process_diagnostic_signals(configuration_t::instance().get_diagnostic_manager(), can_message);
157 process_can_signals(can_message);
160 new_decoded_can_message_.notify_one();
164 /// @brief thread to push events to suscribers. It will read subscribed_signals map to look
165 /// which are events that has to be pushed.
166 void can_bus_t::can_event_push()
168 openxc_VehicleMessage v_message;
169 openxc_SimpleMessage s_message;
171 utils::signals_manager_t& sm = utils::signals_manager_t::instance();
175 std::unique_lock<std::mutex> decoded_can_message_lock(decoded_can_message_mutex_);
176 new_decoded_can_message_.wait(decoded_can_message_lock);
177 while(!vehicle_message_q_.empty())
179 v_message = next_vehicle_message();
181 s_message = get_simple_message(v_message);
183 std::lock_guard<std::mutex> subscribed_signals_lock(sm.get_subscribed_signals_mutex());
184 std::map<std::string, struct afb_event>& s = sm.get_subscribed_signals();
185 if(s.find(std::string(s_message.name)) != s.end() && afb_event_is_valid(s[std::string(s_message.name)]))
187 jo = json_object_new_object();
188 jsonify_simple(s_message, jo);
189 if(afb_event_push(s[std::string(s_message.name)], jo) == 0)
190 on_no_clients(std::string(s_message.name));
197 /// @brief Will initialize threads that will decode
198 /// and push subscribed events.
199 void can_bus_t::start_threads()
202 th_decoding_ = std::thread(&can_bus_t::can_decode_message, this);
203 if(!th_decoding_.joinable())
204 is_decoding_ = false;
207 th_pushing_ = std::thread(&can_bus_t::can_event_push, this);
208 if(!th_pushing_.joinable())
212 /// @brief Will stop all threads holded by can_bus_t object
213 /// which are decoding and pushing then will wait that's
214 /// they'll finish their job.
215 void can_bus_t::stop_threads()
217 is_decoding_ = false;
221 /// @brief Will initialize can_bus_dev_t objects after reading
222 /// the configuration file passed in the constructor. All CAN buses
223 /// Initialized here will be added to a vector holding them for
224 /// inventory and later access.
226 /// That will initialize CAN socket reading too using a new thread.
228 /// @return 0 if ok, other if not.
229 int can_bus_t::init_can_dev()
231 std::vector<std::string> devices_name;
235 if(conf_file_.check_conf())
237 devices_name = conf_file_.get_devices_name();
238 if (! devices_name.empty())
240 t = devices_name.size();
242 for(const auto& device : devices_name)
244 can_bus_t::can_devices_[device] = std::make_shared<can_bus_dev_t>(device, i);
245 if (can_bus_t::can_devices_[device]->open() >= 0)
247 can_bus_t::can_devices_[device]->configure();
248 DEBUG(binder_interface, "%s: Start reading thread", __FUNCTION__);
249 NOTICE(binder_interface, "%s: %s device opened and reading", __FUNCTION__, device.c_str());
250 //can_bus_t::can_devices_[device]->start_reading(*this);
255 ERROR(binder_interface, "%s: Can't open device %s", __FUNCTION__, device.c_str());
259 NOTICE(binder_interface, "%s: Initialized %d/%d can bus device(s)", __FUNCTION__, i, (int)t);
262 ERROR(binder_interface, "%s: Error at CAN device initialization. No devices read from configuration file", __FUNCTION__);
265 ERROR(binder_interface, "%s: Can't read INI configuration file", __FUNCTION__);
269 /// @brief return new_can_message_cv_ member
271 /// @return return new_can_message_cv_ member
272 std::condition_variable& can_bus_t::get_new_can_message_cv()
274 return new_can_message_cv_;
277 /// @brief return can_message_mutex_ member
279 /// @return return can_message_mutex_ member
280 std::mutex& can_bus_t::get_can_message_mutex()
282 return can_message_mutex_;
285 /// @brief Return first can_message_t on the queue
287 /// @return a can_message_t
288 can_message_t can_bus_t::next_can_message()
290 can_message_t can_msg;
292 if(!can_message_q_.empty())
294 can_msg = can_message_q_.front();
295 can_message_q_.pop();
296 DEBUG(binder_interface, "%s: Here is the next can message : id %X, length %X, data %02X%02X%02X%02X%02X%02X%02X%02X", __FUNCTION__, can_msg.get_id(), can_msg.get_length(),
297 can_msg.get_data()[0], can_msg.get_data()[1], can_msg.get_data()[2], can_msg.get_data()[3], can_msg.get_data()[4], can_msg.get_data()[5], can_msg.get_data()[6], can_msg.get_data()[7]);
304 /// @brief Push a can_message_t into the queue
306 /// @param[in] can_msg - the const reference can_message_t object to push into the queue
307 void can_bus_t::push_new_can_message(const can_message_t& can_msg)
309 can_message_q_.push(can_msg);
312 /// @brief Return first openxc_VehicleMessage on the queue
314 /// @return a openxc_VehicleMessage containing a decoded can message
315 openxc_VehicleMessage can_bus_t::next_vehicle_message()
317 openxc_VehicleMessage v_msg;
319 if(! vehicle_message_q_.empty())
321 v_msg = vehicle_message_q_.front();
322 vehicle_message_q_.pop();
323 DEBUG(binder_interface, "%s: next vehicle message poped", __FUNCTION__);
330 /// @brief Push a openxc_VehicleMessage into the queue
332 /// @param[in] v_msg - const reference openxc_VehicleMessage object to push into the queue
333 void can_bus_t::push_new_vehicle_message(const openxc_VehicleMessage& v_msg)
335 vehicle_message_q_.push(v_msg);
338 /// @brief Return a map with the can_bus_dev_t initialized
340 /// @return map can_bus_dev_m_ map
341 const std::map<std::string, std::shared_ptr<can_bus_dev_t>>& can_bus_t::get_can_devices() const
343 return can_bus_t::can_devices_;
346 /// @brief Return the shared pointer on the can_bus_dev_t initialized
347 /// with device_name "bus"
349 /// @param[in] bus - CAN bus device name to retrieve.
351 /// @return A shared pointer on an object can_bus_dev_t
352 std::shared_ptr<can_bus_dev_t> can_bus_t::get_can_device(std::string bus)
354 return can_bus_t::can_devices_[bus];