/* * 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. */ /* * A representation of an OBD-II PID. * * pid - The 1 byte PID. * name - A human readable name to use for this PID when published. * frequency - The frequency to request this PID if supported by the vehicle * when automatic, recurring OBD-II requests are enabled. */ enum UNIT { POURCENT, DEGREES_CELSIUS, KPA, RPM, GRAMS_SEC, SECONDS, KM, KM_H, PA, NM }; const char *UNIT_NAMES[10] = { "POURCENT", "DEGREES_CELSIUS", "KPA", "RPM", "GRAMS_SEC", "SECONDS", "KM", "KM_H", "PA", "NM" }; /* * A representation of an OBD-II PID. * * pid - The 1 byte PID. * name - A human readable name to use for this PID when published. * min - minimum value for this pid * max - maximum value for this pid * unit - unit used * frequency - The frequency to request this PID if supported by the vehicle * when automatic, recurring OBD-II requests are enabled. * supported - is it supported by the vehicle. Initialized after scan * event - application framework event handler. * */ typedef struct _Obd2Pid { uint8_t pid; const char* name; const int min; const int max; enum UNIT unit; int frequency; bool supported; struct afb_event event; } Obd2Pid; /* { pid: 0x4, name: "engine.load", frequency: 5 }, { pid: 0x5, name: "engine.coolant.temperature", frequency: 1 }, { pid: 0xa, name: "fuel.pressure", frequency: 1 }, { pid: 0xb, name: "intake.manifold.pressure", frequency: 1 }, { pid: 0xc, name: "engine.speed", frequency: 5 }, { pid: 0xd, name: "vehicle.speed", frequency: 5 }, { pid: 0xf, name: "intake.air.temperature", frequency: 1 }, { pid: 0x10, name: "mass.airflow", frequency: 5 }, { pid: 0x11, name: "throttle.position", frequency: 5 }, { pid: 0x1f, name: "running.time", frequency: 1 }, { pid: 0x27, name: "fuel.level", frequency: 1 }, { pid: 0x33, name: "barometric.pressure", frequency: 1 }, { pid: 0x4c, name: "commanded.throttle.position", frequency: 1 }, { pid: 0x52, name: "ethanol.fuel.percentage", frequency: 1 }, { pid: 0x5a, name: "accelerator.pedal.position", frequency: 5 }, { pid: 0x5c, name: "engine.oil.temperature", frequency: 1 }, { pid: 0x63, name: "engine.torque", frequency: 1 }, }; */ /* Public: Check if a request is an OBD-II PID request. * * Returns true if the request is a mode 1 request and it has a 1 byte PID. */ bool isObd2Request(DiagnosticRequest* request); /* Public: 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). */ float handleObd2Pid(const DiagnosticResponse* response, float parsedPayload); /* * Object to handle obd2 session with pre-scan of supported pid * then request them regularly */ class Obd2Handler_c { private: /* * Pre-defined OBD-II PIDs to query for if supported by the vehicle. */ const Obd2Pid OBD2_PIDS[] = { { pid: 0x04, name: "obd2.engine.load", min:0, max: 100, unit: POURCENT, frequency: 5, supported: false }, { pid: 0x05, name: "obd2.engine.coolant.temperature", min: -40, max: 215, unit: DEGREES_CELSIUS, frequency: 1, supported: false }, { pid: 0x0a, name: "obd2.fuel.pressure", min: 0, max: 765, unit: KPA, frequency: 1, supported: false }, { pid: 0x0b, name: "obd2.intake.manifold.pressure", min: 0, max: 255, unit: KPA, frequency: 1, supported: false }, { pid: 0x0c, name: "obd2.engine.speed", min: 0, max: 16383, unit: RPM, frequency: 5, supported: false }, { pid: 0x0d, name: "obd2.vehicle.speed", min: 0, max: 255, unit: KM_H, frequency: 5, supported: false }, { pid: 0x0f, name: "obd2.intake.air.temperature", min: -40, max:215, unit: DEGREES_CELSIUS, frequency: 1, supported: false }, { pid: 0x10, name: "obd2.mass.airflow", min: 0, max: 655, unit: GRAMS_SEC, frequency: 5, supported: false }, { pid: 0x11, name: "obd2.throttle.position", min: 0, max: 100, unit: POURCENT, frequency: 5, supported: false }, { pid: 0x1f, name: "obd2.running.time", min: 0, max: 65535, unit: SECONDS, frequency: 1, supported: false }, { pid: 0x2d, name: "obd2.EGR.error", min: -100, max: 99, unit: POURCENT, frequency: 0, supported: false }, { pid: 0x2f, name: "obd2.fuel.level", min: 0, max: 100, unit: POURCENT, frequency: 1, supported: false }, { pid: 0x33, name: "obd2.barometric.pressure", min: 0, max: 255, unit: KPA, frequency: 1, supported: false }, { pid: 0x4c, name: "obd2.commanded.throttle.position", min: 0, max: 100, unit: POURCENT, frequency: 1, supported: false }, { pid: 0x52, name: "obd2.ethanol.fuel.percentage", min: 0, max: 100, unit: POURCENT, frequency: 1, supported: false }, { pid: 0x5a, name: "obd2.accelerator.pedal.position", min: 0, max: 100, unit: POURCENT, frequency: 5, supported: false }, { pid: 0x5b, name: "obd2.hybrid.battery-pack.remaining.life", min: 0, max: 100, unit: POURCENT, frequency: 5, supported: false }, { pid: 0x5c, name: "obd2.engine.oil.temperature",min: -40, max: 210, unit: DEGREES_CELSIUS, frequency: 1, supported: false }, { pid: 0x63, name: "obd2.engine.torque", min: 0, max: 65535, unit: NM, frequency: 1, supported: false }, }; public: Obd2Handler_c(); bool isObd2Request(request); }