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.
18 #include "obd2/obd2-signals.hpp"
20 #include "utils/signals.hpp"
22 #define OBD2_FUNCTIONAL_BROADCAST_ID 0x7df
24 const char *UNIT_NAMES[10] = {
38 * Pre-defined OBD-II PIDs to query for if supported by the vehicle.
40 std::vector<obd2_signals_t> OBD2_PIDS = {
41 { 0x04, "obd2.engine.load", 0, 100, POURCENT, 5, false},
42 { 0x05, "obd2.engine.coolant.temperature", -40, 215, DEGREES_CELSIUS, 1, false},
43 { 0x0a, "obd2.fuel.pressure", 0, 765, KPA, 1, false},
44 { 0x0b, "obd2.intake.manifold.pressure", 0, 255, KPA, 1, false},
45 { 0x0c, "obd2.engine.speed", 0, 16383, RPM, 5, false},
46 { 0x0d, "obd2.vehicle.speed", 0, 255, KM_H, 5, false},
47 { 0x0f, "obd2.intake.air.temperature", -40, 215, DEGREES_CELSIUS, 1, false},
48 { 0x10, "obd2.mass.airflow", 0, 655, GRAMS_SEC, 5, false},
49 { 0x11, "obd2.throttle.position", 0, 100, POURCENT, 5, false},
50 { 0x1f, "obd2.running.time", 0, 65535, SECONDS, 1, false},
51 { 0x2d, "obd2.EGR.error", -100, 99, POURCENT, 0, false},
52 { 0x2f, "obd2.fuel.level", 0, 100, POURCENT, 1, false},
53 { 0x33, "obd2.barometric.pressure", 0, 255, KPA, 1, false},
54 { 0x4c, "obd2.commanded.throttle.position", 0, 100, POURCENT, 1, false},
55 { 0x52, "obd2.ethanol.fuel.percentage", 0, 100, POURCENT, 1, false},
56 { 0x5a, "obd2.accelerator.pedal.position", 0, 100, POURCENT, 5, false},
57 { 0x5b, "obd2.hybrid.battery-pack.remaining.life", 0, 100, POURCENT, 5, false},
58 { 0x5c, "obd2.engine.oil.temperature",-40, 210, DEGREES_CELSIUS, 1, false},
59 { 0x63, "obd2.engine.torque", 0, 65535, NM, 1, false}
62 obd2_signals_t::obd2_signals_t(uint8_t pid, const char* generic_name, const int min, const int max, enum UNIT unit, int frequency, bool supported)
63 : pid_{pid}, generic_name_{generic_name}, min_{min}, max_{max}, unit_{unit}, frequency_{frequency}, supported_{supported}
67 std::vector<obd2_signals_t>& get_obd2_signals()
73 * @fn std::vector<std::string> find_signals(const openxc_DynamicField &key)
74 * @brief return signals name found searching through CAN_signals and OBD2 pid
76 * @param[in] const openxc_DynamicField : can contain numeric or string value in order to search against
77 * can signals or obd2 signals name.
79 * @return std::vector<std::string> Vector of signals name found.
81 void obd2_signals_t::find_obd2_signals(const openxc_DynamicField &key, std::vector<obd2_signals_t*>& found_signals)
85 case openxc_DynamicField_Type::openxc_DynamicField_Type_STRING:
86 lookup_signals_by_name(key.string_value, get_obd2_signals(), found_signals);
88 case openxc_DynamicField_Type::openxc_DynamicField_Type_NUM:
89 lookup_signals_by_id(key.numeric_value, get_obd2_signals(), found_signals);
92 ERROR(binder_interface, "find_signals: wrong openxc_DynamicField specified. Use openxc_DynamicField_Type_NUM or openxc_DynamicField_Type_STRING type only.");
95 DEBUG(binder_interface, "Found %d signal(s)", (int)found_signals.size());
98 uint32_t get_signal_id(const Obd2Pid& sig)
100 return (uint32_t)sig.pid;
103 void shims_logger(const char* m, const struct afb_binding_interface *interface)
105 DEBUG(interface, "%s", m);
112 bool obd2_signals_t::is_obd2_response(can_message_t can_message)
114 if(can_message.get_id() >= 0x7E8 && can_message.get_id() <= 0x7EF)
116 openxc_VehicleMessage message = {0};
117 message.has_type = true;
118 message.type = openxc_VehicleMessage_Type_DIAGNOSTIC;
119 message.has_diagnostic_response = true;
120 message.diagnostic_response = {0};
121 message.diagnostic_response.has_bus = true;
122 message.diagnostic_response.bus = bus->address;
123 message.diagnostic_response.has_message_id = true;
124 //7DF should respond with a random message id between 7e8 and 7ef
125 //7E0 through 7E7 should respond with a id that is 8 higher (7E0->7E8)
126 if(can_message.get_id() == 0x7DF)
128 message.diagnostic_response.message_id = rand()%(0x7EF-0x7E8 + 1) + 0x7E8;
130 else if(commandRequest->message_id >= 0x7E0 && commandRequest->message_id <= 0x7E7)
132 message.diagnostic_response.message_id = commandRequest->message_id + 8;
134 message.diagnostic_response.has_mode = true;
135 message.diagnostic_response.mode = commandRequest->mode;
136 if(commandRequest->has_pid)
138 message.diagnostic_response.has_pid = true;
139 message.diagnostic_response.pid = commandRequest->pid;
141 message.diagnostic_response.has_value = true;
142 message.diagnostic_response.value = rand() % 100;
143 pipeline::publish(&message, &getConfiguration()->pipeline);
145 else //If it's outside the range, the command_request will return false
147 debug("Sent message ID is outside the valid range for emulator (7DF to 7E7)");
153 void obd2_signals_t::add_request(int pid)
155 DiagnosticRequest request = {
156 arbitration_id: OBD2_FUNCTIONAL_BROADCAST_ID,
157 mode: 0x1, has_true, pid};
161 * @brief Check if a request is an OBD-II PID request.
163 * @return true if the request is a mode 1 request and it has a 1 byte PID.
165 bool obd2_signals_t::is_obd2_request(DiagnosticRequest* request)
167 return request->mode == 0x1 && request->has_pid && request->pid < 0xff;
171 * @brief Check if requested signal name is an obd2 pid
173 * @return true if name began with obd2 else false.
175 bool obd2_signals_t::is_obd2_signal(const char *name)
177 if(fnmatch("obd2.*", name, FNM_CASEFOLD) == 0)
183 * @brief Decode the payload of an OBD-II PID.
185 * This function matches the type signature for a DiagnosticResponseDecoder, so
186 * it can be used as the decoder for a DiagnosticRequest. It returns the decoded
187 * value of the PID, using the standard formulas (see
188 * http://en.wikipedia.org/wiki/OBD-II_PIDs#Mode_01).
190 * @param[in] DiagnosticResponse response - the received DiagnosticResponse (the data is in response.payload,
191 * a byte array). This is most often used when the byte order is
192 * signiticant, i.e. with many OBD-II PID formulas.
193 * @param[in] float parsed_payload - the entire payload of the response parsed as an int.
195 float obd2_signals_t::decode_obd2_response(const DiagnosticResponse* response, float parsedPayload)
197 return diagnostic_decode_obd2_pid(response);