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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 <systemd/sd-event.h>
#include <queue>
#include <vector>
#include "uds/uds.h"
#include "../can/can-bus-dev.hpp"
#include "../can/can-message.hpp"
#include "active-diagnostic-request.hpp"
#include "../low-can-binding.hpp"
/* Private: Each CAN bus needs its own set of shim functions, so this should
* match the maximum CAN controller count.
*/
#define MAX_SHIM_COUNT can_bus_t.get_can_devices().size()
class active_diagnostic_request_t;
/**
* @brief The core structure for running the diagnostics module on the VI.
*
* @desc This stores details about the active requests and shims required to connect
* the diagnostics library to the VI's CAN peripheral.
*/
class diagnostic_manager_t {
protected:
static bool shims_send(const uint32_t arbitration_id, const uint8_t* data, const uint8_t size);
static void shims_logger(const char* m, ...);
static void shims_timer();
private:
DiagnosticShims shims_; /*!< shims_ - An array of shim functions for each CAN bus that plug the diagnostics
* library (uds-c) into the VI's CAN peripheral.*/
std::shared_ptr<can_bus_dev_t> bus_; /*!< bus_ - A pointer to the CAN bus that should be used for all standard OBD-II requests, if the bus is not
* explicitly spcified in the request. If NULL, all requests require an explicit bus.*/
std::vector<active_diagnostic_request_t*> recurring_requests_; /*!< recurringRequests - A queue of active, recurring diagnostic requests. When
* a response is received for a recurring request or it times out, it is
* popped from the queue and pushed onto the back. */
std::vector<active_diagnostic_request_t*> non_recurring_requests_; /*!< nonrecurringRequests - A list of active one-time diagnostic requests. When a
* response is received for a non-recurring request or it times out, it is
* removed from this list and placed back in the free list.*/
std::vector<active_diagnostic_request_t*> free_request_entries_; /*!< freeRequestEntries - A list of all available slots for active diagnostic
* requests. This free list is backed by statically allocated entries in
* the requestListEntries attribute.*/
std::vector<active_diagnostic_request_t*> request_list_entries_; /*!< requestListEntries - Static allocation for all active diagnostic requests.*/
bool initialized_; /*!< * initialized - True if the DiagnosticsManager has been initialized with shims. It will interface with the uds-c lib*/
void init_diagnostic_shims();
void reset();
public:
diagnostic_manager_t();
bool initialize(std::shared_ptr<can_bus_dev_t> cbd);
std::shared_ptr<can_bus_dev_t> get_can_bus_dev();
active_diagnostic_request_t* get_free_entry();
DiagnosticShims& get_shims();
void find_and_erase(active_diagnostic_request_t* entry, std::vector<active_diagnostic_request_t*>& requests_list);
void cancel_request(active_diagnostic_request_t* entry);
void cleanup_request(active_diagnostic_request_t* entry, bool force);
void cleanup_active_requests(bool force);
bool lookup_recurring_request(const DiagnosticRequest* request);
bool validate_optional_request_attributes(float frequencyHz);
void checkSupportedPids(const active_diagnostic_request_t& request,
const DiagnosticResponse& response, float parsedPayload);
bool add_request(DiagnosticRequest* request, const std::string name,
bool waitForMultipleResponses, const DiagnosticResponseDecoder decoder,
const DiagnosticResponseCallback callback);
bool add_recurring_request(DiagnosticRequest* request, const char* name,
bool waitForMultipleResponses, const DiagnosticResponseDecoder decoder,
const DiagnosticResponseCallback callback, float frequencyHz);
bool conflicting(active_diagnostic_request_t* request, active_diagnostic_request_t* candidate) const;
bool clear_to_send(active_diagnostic_request_t* request) const;
static int send_request(sd_event_source *s, uint64_t usec, void *userdata);
};
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