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authorRomain Forlot <romain.forlot@iot.bzh>2017-02-17 09:10:10 +0000
committerRomain Forlot <romain.forlot@iot.bzh>2017-02-20 11:14:55 +0000
commit860d6bd4a829ee5aca50b93122474c9bf68fff9d (patch)
tree9439480025436f103c40ba7e15e9a21bd3a51dfc /src/can-utils.h
parent6f6364f74a4c454d096b0525bdb7563783ee80b7 (diff)
Rename header file to hpp.
Change-Id: I399e0c0f39b18e63e254825b6322faf77896a264 Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
Diffstat (limited to 'src/can-utils.h')
-rw-r--r--src/can-utils.h393
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diff --git a/src/can-utils.h b/src/can-utils.h
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--- a/src/can-utils.h
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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 <string>
-#include "timer.h"
-#include "openxc.pb.h"
-
-// TODO actual max is 32 but dropped to 24 for memory considerations
-#define MAX_ACCEPTANCE_FILTERS 24
-// TODO this takes up a ton of memory
-#define MAX_DYNAMIC_MESSAGE_COUNT 12
-
-#define CAN_MESSAGE_SIZE 8
-
-#define CAN_ACTIVE_TIMEOUT_S 30
-
-#define QUEUE_DECLARE(type, max_length) \
-static const int queue_##type##_max_length = max_length; \
-static const int queue_##type##_max_internal_length = max_length + 1; \
-typedef struct queue_##type##_s { \
- int head; \
- int tail; \
- type elements[max_length + 1]; \
-} queue_##type; \
-\
-bool queue_##type##_push(queue_##type* queue, type value); \
-\
-type queue_##type##_pop(queue_##type* queue); \
-\
-type queue_##type##_peek(queue_##type* queue); \
-void queue_##type##_init(queue_##type* queue); \
-int queue_##type##_length(queue_##type* queue); \
-int queue_##type##_available(queue_##type* queue); \
-bool queue_##type##_full(queue_##type* queue); \
-bool queue_##type##_empty(queue_##type* queue); \
-void queue_##type##_snapshot(queue_##type* queue, type* snapshot, int max);
-
-/* Public: The type signature for a CAN signal decoder.
- *
- * A SignalDecoder transforms a raw floating point CAN signal into a number,
- * string or boolean.
- *
- * signal - The CAN signal that we are decoding.
- * signals - The list of all signals.
- * signalCount - The length of the signals array.
- * value - The CAN signal parsed from the message as a raw floating point
- * value.
- * send - An output parameter. If the decoding failed or the CAN signal should
- * not send for some other reason, this should be flipped to false.
- *
- * Returns a decoded value in an openxc_DynamicField struct.
- */
-typedef openxc_DynamicField (*SignalDecoder)(struct CanSignal* signal,
- CanSignal* signals, int signalCount, float value, bool* send);
-
-/* Public: The type signature for a CAN signal encoder.
- *
- * A SignalEncoder transforms a number, string or boolean into a raw floating
- * point value that fits in the CAN signal.
- *
- * signal - The CAN signal to encode.
- * value - The dynamic field to encode.
- * send - An output parameter. If the encoding failed or the CAN signal should
- * not be encoded for some other reason, this will be flipped to false.
- */
-typedef uint64_t (*SignalEncoder)(struct CanSignal* signal,
- openxc_DynamicField* value, bool* send);
-
-/*
- * CanBus represent a can device definition gotten from configuraiton file
- */
-class can_bus_t {
- private:
- afb_binding_interface *interface_;
-
- /* Got from conf file */
- std::string device_name;
-
- int can_socket_;
- bool is_fdmode_on_;
- struct sockaddr_can txAddress_;
-
- std::thread th_reading_;
- bool is_running_;
- std::thread th_decoding_;
- std::thread th_pushing_;
-
- std::queue <can_message_t> can_message_q_;
- std::queue <openxc_VehicleMessage> vehicle_message_q_;
-
- public:
- int open();
- int close();
-
- void start_threads();
- bool is_running();
-
- int send_can_message(can_message_t can_msg);
-
- can_message_t* next_can_message();
- void insert_new_can_message(can_message_t &can_msg);
- bool has_can_message_;
-
- openxc_VehicleMessage* next_vehicle_message();
- void insert_new_vehicle_message(openxc_VehicleMessage *v_msg);
- bool has_vehicle_message_;
-};
-
-/* A compact representation of a single CAN message, meant to be used in in/out
- * buffers.
- *
- * id - The ID of the message.
- * format - the format of the message's ID.
- * data - The message's data field.
- * length - the length of the data array (max 8).
-struct CanMessage {
- uint32_t id;
- CanMessageFormat format;
- uint8_t data[CAN_MESSAGE_SIZE];
- uint8_t length;
-};
-typedef struct CanMessage CanMessage;
-*/
-class can_message_t {
- private:
- afb_binding_interface interface_;
- uint32_t id_;
- CanMessageFormat format_;
- uint8_t data_[CAN_MESSAGE_SIZE];
- uint8_t length_;
-
- public:
- uint32_t get_id() const;
- int get_format() const;
- uint8_t get_data() const;
- uint8_t get_lenght() const;
-
- void set_id(uint32_t id);
- void set_format(CanMessageFormat format);
- void set_data(uint8_t data);
- void set_lenght(uint8_t length);
-
- void convert_from_canfd_frame(canfd_frame frame);
- canfd_frame convert_to_canfd_frame();
-};
-
-QUEUE_DECLARE(can_message_t, 8);
-
-/* Public: The ID format for a CAN message.
- *
- * STANDARD - standard 11-bit CAN arbitration ID.
- * EXTENDED - an extended frame, with a 29-bit arbitration ID.
- */
-enum CanMessageFormat {
- STANDARD,
- EXTENDED,
-};
-typedef enum CanMessageFormat CanMessageFormat;
-
-/* Public: A state encoded (SED) signal's mapping from numerical values to
- * OpenXC state names.
- *
- * value - The integer value of the state on the CAN bus.
- * name - The corresponding string name for the state in OpenXC.
- */
-struct CanSignalState {
- const int value;
- const char* name;
-};
-typedef struct CanSignalState CanSignalState;
-
-/* Public: A CAN signal to decode from the bus and output over USB.
- *
- * message - The message this signal is a part of.
- * genericName - The name of the signal to be output over USB.
- * bitPosition - The starting bit of the signal in its CAN message (assuming
- * non-inverted bit numbering, i.e. the most significant bit of
- * each byte is 0)
- * bitSize - The width of the bit field in the CAN message.
- * factor - The final value will be multiplied by this factor. Use 1 if you
- * don't need a factor.
- * offset - The final value will be added to this offset. Use 0 if you
- * don't need an offset.
- * minValue - The minimum value for the processed signal.
- * maxValue - The maximum value for the processed signal.
- * frequencyClock - A FrequencyClock struct to control the maximum frequency to
- * process and send this signal. To process every value, set the
- * clock's frequency to 0.
- * sendSame - If true, will re-send even if the value hasn't changed.
- * forceSendChanged - If true, regardless of the frequency, it will send the
- * value if it has changed.
- * states - An array of CanSignalState describing the mapping
- * between numerical and string values for valid states.
- * stateCount - The length of the states array.
- * writable - True if the signal is allowed to be written from the USB host
- * back to CAN. Defaults to false.
- * decoder - An optional function to decode a signal from the bus to a human
- * readable value. If NULL, the default numerical decoder is used.
- * encoder - An optional function to encode a signal value to be written to
- * CAN into a byte array. If NULL, the default numerical encoder
- * is used.
- * received - True if this signal has ever been received.
- * lastValue - The last received value of the signal. If 'received' is false,
- * this value is undefined.
- */
-struct CanSignal {
- struct CanMessageDefinition* message;
- const char* genericName;
- uint8_t bitPosition;
- uint8_t bitSize;
- float factor;
- float offset;
- float minValue;
- float maxValue;
- FrequencyClock frequencyClock;
- bool sendSame;
- bool forceSendChanged;
- const CanSignalState* states;
- uint8_t stateCount;
- bool writable;
- SignalDecoder decoder;
- SignalEncoder encoder;
- bool received;
- float lastValue;
-};
-typedef struct CanSignal CanSignal;
-
-/* Public: The definition of a CAN message. This includes a lot of metadata, so
- * to save memory this struct should not be used for storing incoming and
- * outgoing CAN messages.
- *
- * bus - A pointer to the bus this message is on.
- * id - The ID of the message.
- * format - the format of the message's ID.
- * clock - an optional frequency clock to control the output of this
- * message, if sent raw, or simply to mark the max frequency for custom
- * handlers to retrieve.
- * forceSendChanged - If true, regardless of the frequency, it will send CAN
- * message if it has changed when using raw passthrough.
- * lastValue - The last received value of the message. Defaults to undefined.
- * This is required for the forceSendChanged functionality, as the stack
- * needs to compare an incoming CAN message with the previous frame.
- */
-struct CanMessageDefinition {
- struct CanBus* bus;
- uint32_t id;
- CanMessageFormat format;
- FrequencyClock frequencyClock;
- bool forceSendChanged;
- uint8_t lastValue[CAN_MESSAGE_SIZE];
-};
-typedef struct CanMessageDefinition CanMessageDefinition;
-
-/* Private: An entry in the list of acceptance filters for each CanBus.
- *
- * This struct is meant to be used with a LIST type from <sys/queue.h>.
- *
- * filter - the value for the CAN acceptance filter.
- * activeUserCount - The number of active consumers of this filter's messages.
- * When 0, this filter can be removed.
- * format - the format of the ID for the filter.
-struct AcceptanceFilterListEntry {
- uint32_t filter;
- uint8_t activeUserCount;
- CanMessageFormat format;
- LIST_ENTRY(AcceptanceFilterListEntry) entries;
-};
- */
-
-/* Private: A type of list containing CAN acceptance filters.
-LIST_HEAD(AcceptanceFilterList, AcceptanceFilterListEntry);
-
-struct CanMessageDefinitionListEntry {
- CanMessageDefinition definition;
- LIST_ENTRY(CanMessageDefinitionListEntry) entries;
-};
-LIST_HEAD(CanMessageDefinitionList, CanMessageDefinitionListEntry);
- */
-
-/** Public: A parent wrapper for a particular set of CAN messages and associated
- * CAN buses(e.g. a vehicle or program).
- *
- * index - A numerical ID for the message set, ideally the index in an array
- * for fast lookup
- * name - The name of the message set.
- * busCount - The number of CAN buses defined for this message set.
- * messageCount - The number of CAN messages (across all buses) defined for
- * this message set.
- * signalCount - The number of CAN signals (across all messages) defined for
- * this message set.
- * commandCount - The number of CanCommmands defined for this message set.
- */
- typedef struct {
- uint8_t index;
- const char* name;
- uint8_t busCount;
- unsigned short messageCount;
- unsigned short signalCount;
- unsigned short commandCount;
-} CanMessageSet;
-
-/* Public: The type signature for a function to handle a custom OpenXC command.
- *
- * name - the name of the received command.
- * value - the value of the received command, in a DynamicField. The actual type
- * may be a number, string or bool.
- * event - an optional event from the received command, in a DynamicField. The
- * actual type may be a number, string or bool.
- * signals - The list of all signals.
- * signalCount - The length of the signals array.
- */
-typedef void (*CommandHandler)(const char* name, openxc_DynamicField* value,
- openxc_DynamicField* event, CanSignal* signals, int signalCount);
-
-/* Public: The structure to represent a supported custom OpenXC command.
- *
- * For completely customized CAN commands without a 1-1 mapping between an
- * OpenXC message from the host and a CAN signal, you can define the name of the
- * command and a custom function to handle it in the VI. An example is
- * the "turn_signal_status" command in OpenXC, which has a value of "left" or
- * "right". The vehicle may have separate CAN signals for the left and right
- * turn signals, so you will need to implement a custom command handler to send
- * the correct signals.
- *
- * Command handlers are also useful if you want to trigger multiple CAN messages
- * or signals from a signal OpenXC message.
- *
- * genericName - The name of the command.
- * handler - An function to process the received command's data and perform some
- * action.
-typedef struct {
- const char* genericName;
- CommandHandler handler;
-} CanCommand;
- */
-
-class CanCommand_c {
- private:
- const char* genericName;
- CommandHandler handler;
-};
-
-/* Pre initialize actions made before CAN bus initialization
- *
- * bus - A CanBus struct defining the bus's metadata
- * writable - configure the controller in a writable mode. If false, it will be
- * configured as "listen only" and will not allow writes or even CAN ACKs.
- * buses - An array of all CAN buses.
- * busCount - The length of the buses array.
- */
-void pre_initialize(CanBus* bus, bool writable, CanBus* buses, const int busCount);
-
-/* Post-initialize actions made after CAN bus initialization and before the
- * event loop connection.
- *
- * bus - A CanBus struct defining the bus's metadata
- * writable - configure the controller in a writable mode. If false, it will be
- * configured as "listen only" and will not allow writes or even CAN ACKs.
- * buses - An array of all CAN buses.
- * busCount - The length of the buses array.
- */
-void post_initialize(CanBus* bus, bool writable, CanBus* buses, const int busCount);
-
-/* Public: Check if the device is connected to an active CAN bus, i.e. it's
- * received a message in the recent past.
- *
- * Returns true if a message was received on the CAN bus within
- * CAN_ACTIVE_TIMEOUT_S seconds.
- */
-bool isBusActive(CanBus* bus);
-
-/* Public: Log transfer statistics about all active CAN buses to the debug log.
- *
- * buses - an array of active CAN buses.
- * busCount - the length of the buses array.
- */
-void logBusStatistics(CanBus* buses, const int busCount);