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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.
*/
#pragma once
#include <vector>
#include "uds/uds.h"
#include "can-bus.hpp"
#include "low-can-binding.hpp"
enum UNIT {
POURCENT,
DEGREES_CELSIUS,
KPA,
RPM,
GRAMS_SEC,
SECONDS,
KM,
KM_H,
PA,
NM,
INVALID
};
/**
* @brief 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
*/
typedef struct _Obd2Pid {
uint8_t pid;
const char* generic_name;
const int min;
const int max;
enum UNIT unit;
int frequency;
bool supported;
} Obd2Pid;
std::vector<Obd2Pid>& get_obd2_signals();
uint32_t get_signal_id(const Obd2Pid& sig);
void find_obd2_signals(const openxc_DynamicField &key, std::vector<Obd2Pid*>& found_signals);
/**
* @brief - Object to handle obd2 session with pre-scan of supported pid
* then request them regularly
*/
class obd2_handler_t {
private:
public:
obd2_handler_t();
/**
* @brief:
*
* Returns
*/
void find_obd2_pid(const char *name, std::vector<Obd2Pid> *pids);
/**
* @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 is_obd2_request(DiagnosticRequest *request);
/**
* @brief Check if requested signal name is an obd2 pid
*
* @return true if name began with ob2.* else false.
*/
bool is_obd2_signal(const char *name);
/**
* @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 handle_obd2_pid(const DiagnosticResponse* response, float parsedPayload);
};
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