src/diagnostic/diagnostic-message.cpp

   1 /*
   2  * Copyright (C) 2015, 2016 "IoT.bzh"
   3  * Author "Romain Forlot" <romain.forlot@iot.bzh>
   4  *
   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
   8  *
   9  *       http://www.apache.org/licenses/LICENSE-2.0
  10  *
  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.
  16  */
  17
  18 #include "obd2/obd2-signals.hpp"
  19
  20 #include "utils/signals.hpp"
  21
  22 const char *UNIT_NAMES[10] = {
  23         "POURCENT",
  24         "DEGREES_CELSIUS",
  25         "KPA",
  26         "RPM",
  27         "GRAMS_SEC",
  28         "SECONDS",
  29         "KM",
  30         "KM_H",
  31         "PA",
  32         "NM"
  33 };
  34
  35 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)
  36         :       pid_{pid}, generic_name_{generic_name}, min_{min}, max_{max}, unit_{unit}, frequency_{frequency}, supported_{supported}
  37 {
  38 }
  39
  40 uint32_t obd2_signals_t::get_pid()
  41 {
  42         return (uint32_t)pid_;
  43 }
  44
  45 /**
  46  * @fn std::vector<std::string> find_signals(const openxc_DynamicField &key)
  47  * @brief return signals name found searching through CAN_signals and OBD2 pid
  48  *
  49  * @param[in] const openxc_DynamicField : can contain numeric or string value in order to search against
  50  *   can signals or obd2 signals name.
  51  *
  52  * @return std::vector<std::string> Vector of signals name found.
  53  */
  54 void obd2_signals_t::find_obd2_signals(const openxc_DynamicField &key, std::vector<obd2_signals_t*>& found_signals)
  55 {
  56         switch(key.type)
  57         {
  58                 case openxc_DynamicField_Type::openxc_DynamicField_Type_STRING:
  59                                 lookup_signals_by_name(key.string_value, get_obd2_signals(), found_signals);
  60                         break;
  61                 case openxc_DynamicField_Type::openxc_DynamicField_Type_NUM:
  62                                 lookup_signals_by_id(key.numeric_value, get_obd2_signals(), found_signals);
  63                         break;
  64                 default:
  65                         ERROR(binder_interface, "find_signals: wrong openxc_DynamicField specified. Use openxc_DynamicField_Type_NUM or openxc_DynamicField_Type_STRING type only.");
  66                         break;
  67         }
  68         DEBUG(binder_interface, "Found %d signal(s)", (int)found_signals.size());
  69 }
  70
  71 bool obd2_signals_t::is_obd2_response(can_message_t can_message)
  72 {
  73         /*
  74         if(can_message.get_id() >= 0x7E8 && can_message.get_id() <= 0x7EF)
  75         {
  76                 openxc_VehicleMessage message = {0};
  77                 message.has_type = true;
  78                 message.type = openxc_VehicleMessage_Type_DIAGNOSTIC;
  79                 message.has_diagnostic_response = true;
  80                 message.diagnostic_response = {0};
  81                 message.diagnostic_response.has_bus = true;
  82                 message.diagnostic_response.bus = bus->address;
  83                 message.diagnostic_response.has_message_id = true;
  84                 //7DF should respond with a random message id between 7e8 and 7ef
  85                 //7E0 through 7E7 should respond with a id that is 8 higher (7E0->7E8)
  86                 if(can_message.get_id() == 0x7DF)
  87                 {
  88                         message.diagnostic_response.message_id = rand()%(0x7EF-0x7E8 + 1) + 0x7E8;
  89                 }
  90                 else if(commandRequest->message_id >= 0x7E0 && commandRequest->message_id <= 0x7E7)
  91                 {
  92                         message.diagnostic_response.message_id = commandRequest->message_id + 8;
  93                 }
  94                 message.diagnostic_response.has_mode = true;
  95                 message.diagnostic_response.mode = commandRequest->mode;
  96                 if(commandRequest->has_pid)
  97                 {
  98                         message.diagnostic_response.has_pid = true;
  99                         message.diagnostic_response.pid = commandRequest->pid;
 100                 }
 101                 message.diagnostic_response.has_value = true;
 102                 message.diagnostic_response.value = rand() % 100;
 103                 pipeline::publish(&message, &getConfiguration()->pipeline);
 104         }
 105         else //If it's outside the range, the command_request will return false
 106         {
 107                 debug("Sent message ID is outside the valid range for emulator (7DF to 7E7)");
 108                 status=false;
 109         }
 110         return false;
 111         */
 112 }
 113
 114 void obd2_signals_t::add_request(int pid)
 115 {
 116         DiagnosticRequest request = {
 117         arbitration_id: OBD2_FUNCTIONAL_BROADCAST_ID,
 118         mode: 0x1, has_pid: true, pid_ };
 119 }
 120
 121 /**
 122 * @brief Check if a request is an OBD-II PID request.
 123 *
 124 * @return true if the request is a mode 1 request and it has a 1 byte PID.
 125 */
 126 bool obd2_signals_t::is_obd2_request(DiagnosticRequest* request)
 127 {
 128         return request->mode == 0x1 && request->has_pid && request->pid < 0xff;
 129 }
 130
 131 /**
 132 * @brief Check if requested signal name is an obd2 pid
 133 *
 134 * @return true if name began with obd2 else false.
 135 */
 136 bool obd2_signals_t::is_obd2_signal(const char *name)
 137 {
 138         if(fnmatch("obd2.*", name, FNM_CASEFOLD) == 0)
 139                 return true;
 140         return false;
 141 }
 142
 143 /**
 144 * @brief Decode the payload of an OBD-II PID.
 145 *
 146 * This function matches the type signature for a DiagnosticResponseDecoder, so
 147 * it can be used as the decoder for a DiagnosticRequest. It returns the decoded
 148 * value of the PID, using the standard formulas (see
 149 * http://en.wikipedia.org/wiki/OBD-II_PIDs#Mode_01).
 150 *
 151 * @param[in] DiagnosticResponse response - the received DiagnosticResponse (the data is in response.payload,
 152 *  a byte array). This is most often used when the byte order is
 153 *  signiticant, i.e. with many OBD-II PID formulas.
 154 * @param[in] float parsed_payload - the entire payload of the response parsed as an int.
 155 */
 156 float obd2_signals_t::decode_obd2_response(const DiagnosticResponse* response, float parsedPayload)
 157 {
 158         return diagnostic_decode_obd2_pid(response);
 159 }