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/*
* Copyright (C) 2015, 2016 "IoT.bzh"
* Author "Romain Forlot" <romain.forlot@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "obd2/obd2-signals.hpp"
#include "utils/signals.hpp"
#define OBD2_FUNCTIONAL_BROADCAST_ID 0x7df
const char *UNIT_NAMES[10] = {
"POURCENT",
"DEGREES_CELSIUS",
"KPA",
"RPM",
"GRAMS_SEC",
"SECONDS",
"KM",
"KM_H",
"PA",
"NM"
};
/*
* Pre-defined OBD-II PIDs to query for if supported by the vehicle.
*/
std::vector<obd2_signals_t> OBD2_PIDS = {
{ 0x04, "obd2.engine.load", 0, 100, POURCENT, 5, false},
{ 0x05, "obd2.engine.coolant.temperature", -40, 215, DEGREES_CELSIUS, 1, false},
{ 0x0a, "obd2.fuel.pressure", 0, 765, KPA, 1, false},
{ 0x0b, "obd2.intake.manifold.pressure", 0, 255, KPA, 1, false},
{ 0x0c, "obd2.engine.speed", 0, 16383, RPM, 5, false},
{ 0x0d, "obd2.vehicle.speed", 0, 255, KM_H, 5, false},
{ 0x0f, "obd2.intake.air.temperature", -40, 215, DEGREES_CELSIUS, 1, false},
{ 0x10, "obd2.mass.airflow", 0, 655, GRAMS_SEC, 5, false},
{ 0x11, "obd2.throttle.position", 0, 100, POURCENT, 5, false},
{ 0x1f, "obd2.running.time", 0, 65535, SECONDS, 1, false},
{ 0x2d, "obd2.EGR.error", -100, 99, POURCENT, 0, false},
{ 0x2f, "obd2.fuel.level", 0, 100, POURCENT, 1, false},
{ 0x33, "obd2.barometric.pressure", 0, 255, KPA, 1, false},
{ 0x4c, "obd2.commanded.throttle.position", 0, 100, POURCENT, 1, false},
{ 0x52, "obd2.ethanol.fuel.percentage", 0, 100, POURCENT, 1, false},
{ 0x5a, "obd2.accelerator.pedal.position", 0, 100, POURCENT, 5, false},
{ 0x5b, "obd2.hybrid.battery-pack.remaining.life", 0, 100, POURCENT, 5, false},
{ 0x5c, "obd2.engine.oil.temperature",-40, 210, DEGREES_CELSIUS, 1, false},
{ 0x63, "obd2.engine.torque", 0, 65535, NM, 1, false}
};
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)
: pid_{pid}, generic_name_{generic_name}, min_{min}, max_{max}, unit_{unit}, frequency_{frequency}, supported_{supported}
{
}
std::vector<obd2_signals_t>& get_obd2_signals()
{
return OBD2_PIDS;
}
/**
* @fn std::vector<std::string> find_signals(const openxc_DynamicField &key)
* @brief return signals name found searching through CAN_signals and OBD2 pid
*
* @param[in] const openxc_DynamicField : can contain numeric or string value in order to search against
* can signals or obd2 signals name.
*
* @return std::vector<std::string> Vector of signals name found.
*/
void obd2_signals_t::find_obd2_signals(const openxc_DynamicField &key, std::vector<obd2_signals_t*>& found_signals)
{
switch(key.type)
{
case openxc_DynamicField_Type::openxc_DynamicField_Type_STRING:
lookup_signals_by_name(key.string_value, get_obd2_signals(), found_signals);
break;
case openxc_DynamicField_Type::openxc_DynamicField_Type_NUM:
lookup_signals_by_id(key.numeric_value, get_obd2_signals(), found_signals);
break;
default:
ERROR(binder_interface, "find_signals: wrong openxc_DynamicField specified. Use openxc_DynamicField_Type_NUM or openxc_DynamicField_Type_STRING type only.");
break;
}
DEBUG(binder_interface, "Found %d signal(s)", (int)found_signals.size());
}
uint32_t get_signal_id(const obd2_signals_t& sig)
{
return (uint32_t)sig.pid;
}
void shims_logger(const char* m, const struct afb_binding_interface *interface)
{
DEBUG(interface, "%s", m);
}
void shims_timer()
{
}
bool obd2_signals_t::is_obd2_response(can_message_t can_message)
{
if(can_message.get_id() >= 0x7E8 && can_message.get_id() <= 0x7EF)
{
openxc_VehicleMessage message = {0};
message.has_type = true;
message.type = openxc_VehicleMessage_Type_DIAGNOSTIC;
message.has_diagnostic_response = true;
message.diagnostic_response = {0};
message.diagnostic_response.has_bus = true;
message.diagnostic_response.bus = bus->address;
message.diagnostic_response.has_message_id = true;
//7DF should respond with a random message id between 7e8 and 7ef
//7E0 through 7E7 should respond with a id that is 8 higher (7E0->7E8)
if(can_message.get_id() == 0x7DF)
{
message.diagnostic_response.message_id = rand()%(0x7EF-0x7E8 + 1) + 0x7E8;
}
else if(commandRequest->message_id >= 0x7E0 && commandRequest->message_id <= 0x7E7)
{
message.diagnostic_response.message_id = commandRequest->message_id + 8;
}
message.diagnostic_response.has_mode = true;
message.diagnostic_response.mode = commandRequest->mode;
if(commandRequest->has_pid)
{
message.diagnostic_response.has_pid = true;
message.diagnostic_response.pid = commandRequest->pid;
}
message.diagnostic_response.has_value = true;
message.diagnostic_response.value = rand() % 100;
pipeline::publish(&message, &getConfiguration()->pipeline);
}
else //If it's outside the range, the command_request will return false
{
debug("Sent message ID is outside the valid range for emulator (7DF to 7E7)");
status=false;
}
return false;
}
void obd2_signals_t::add_request(int pid)
{
DiagnosticRequest request = {
arbitration_id: OBD2_FUNCTIONAL_BROADCAST_ID,
mode: 0x1, has_true, pid};
}
/**
* @brief Check if a request is an OBD-II PID request.
*
* @return true if the request is a mode 1 request and it has a 1 byte PID.
*/
bool obd2_signals_t::is_obd2_request(DiagnosticRequest* request)
{
return request->mode == 0x1 && request->has_pid && request->pid < 0xff;
}
/**
* @brief Check if requested signal name is an obd2 pid
*
* @return true if name began with obd2 else false.
*/
bool obd2_signals_t::is_obd2_signal(const char *name)
{
if(fnmatch("obd2.*", name, FNM_CASEFOLD) == 0)
return true;
return false;
}
/**
* @brief Decode the payload of an OBD-II PID.
*
* This function matches the type signature for a DiagnosticResponseDecoder, so
* it can be used as the decoder for a DiagnosticRequest. It returns the decoded
* value of the PID, using the standard formulas (see
* http://en.wikipedia.org/wiki/OBD-II_PIDs#Mode_01).
*
* @param[in] DiagnosticResponse response - the received DiagnosticResponse (the data is in response.payload,
* a byte array). This is most often used when the byte order is
* signiticant, i.e. with many OBD-II PID formulas.
* @param[in] float parsed_payload - the entire payload of the response parsed as an int.
*/
float obd2_signals_t::decode_obd2_response(const DiagnosticResponse* response, float parsedPayload)
{
return diagnostic_decode_obd2_pid(response);
}
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