Manages the DM1, DM2, and DM3 messages for ISO11783 or J1939. More...

#include <isobus_diagnostic_protocol.hpp>

Collaboration diagram for isobus::DiagnosticProtocol:

Classes
class	DiagnosticTroubleCode
	A storage class for describing a complete DTC. More...

struct	DM22Data
	A structure to hold data about DM22 responses we need to send. More...

Public Types
enum class	ECUIdentificationFields : std::uint8_t { PartNumber = 0 , SerialNumber , Location , Type , ManufacturerName , HardwareID , NumberOfFields }
	Enumerates the different fields in the ECU identification message. More...

enum class	LampStatus { None , MalfunctionIndicatorLampSolid , MalfunctionIndicatorLampSlowFlash , MalfunctionIndicatorLampFastFlash , RedStopLampSolid , RedStopLampSlowFlash , RedStopLampFastFlash , AmberWarningLampSolid , AmberWarningLampSlowFlash , AmberWarningLampFastFlash , EngineProtectLampSolid , EngineProtectLampSlowFlash , EngineProtectLampFastFlash }
	The DTC lamp status as defined in J1939-73. Not used when in ISO11783 mode. More...

enum class	FailureModeIdentifier { DataValidAboveNormalMostSevere = 0 , DataValidBelowNormalMostSevere = 1 , DataErratic = 2 , VoltageAboveNormal = 3 , VoltageBelowNormal = 4 , CurrentBelowNormal = 5 , CurrentAboveNormal = 6 , MechanicalSystemNotResponding = 7 , AbnormalFrequency = 8 , AbnormalUpdateRate = 9 , AbnormalRateOfChange = 10 , RootCauseNotKnown = 11 , BadIntelligentDevice = 12 , OutOfCalibration = 13 , SpecialInstructions = 14 , DataValidAboveNormalLeastSevere = 15 , DataValidAboveNormalModeratelySevere = 16 , DataValidBelowNormalLeastSevere = 17 , DataValidBelowNormalModeratelySevere = 18 , ReceivedNetworkDataInError = 19 , ConditionExists = 31 }
	FMI as defined in ISO11783-12 Annex E. More...

enum class	TransmitFlags { DM1 = 0 , DM2 , DiagnosticProtocolID , ProductIdentification , DM22 , ECUIdentification , SoftwareIdentification , NumberOfFlags }
	A set of transmit flags to manage sending DM1, DM2, and protocol ID. More...

enum class	NetworkType : std::uint8_t { SAEJ1939Network1PrimaryVehicleNetwork = 0 , SAEJ1922Network = 1 , SAEJ1587Network = 2 , CurrentDataLink = 3 , OtherManufacturerSpecifiedPort = 4 , SAEJ1850Network = 5 , ISO9141Network = 6 , SAEJ1939Network2 = 7 , SAEJ1939Network4 = 8 , ProprietaryNetwork2 = 9 , ProprietaryNetwork1 = 10 , SAEJ1939Network3 = 11 , SAEJ1939Network5 = 25 , SAEJ1939Network6 = 26 , SAEJ1939Network7 = 27 , SAEJ1939Network8 = 28 , SAEJ1939Network11 = 29 , SAEJ1939Network10 = 30 , SAEJ1939Network9 = 31 , Reserved = 32 }
	Enumerates the different networks in the DM13. More...

enum class	StopStartCommand : std::uint8_t { StopBroadcast = 0 , StartBroadcast = 1 , Reserved = 2 , DontCareNoAction = 3 }
	Enumerates the commands in the DM13. More...

enum class	SuspendSignalState : std::uint8_t { IndefiniteSuspension = 0 , PartialIndefiniteSuspension = 1 , TemporarySuspension = 2 , PartialTemporarySuspension = 3 , Resuming = 4 , NotAvailable = 15 }
	Enumerates the different suspend signals for DM13. More...

Public Member Functions
	DiagnosticProtocol (std::shared_ptr< InternalControlFunction > internalControlFunction, NetworkType networkType=NetworkType::ProprietaryNetwork1)
	The constructor for this protocol.

	~DiagnosticProtocol ()
	The destructor for this protocol.

bool	initialize ()
	The protocol's initializer function.

bool	get_initialized () const
	Returns if the protocol has been initialized.

void	terminate ()
	The protocol's terminate function.

void	update ()
	Updates the diagnostic protocol.

void	set_j1939_mode (bool value)
	Enables the protocol to run in J1939 mode instead of ISO11783 mode.

bool	get_j1939_mode () const
	Returns `true` if the protocol is in J1939 mode instead of ISO11783 mode, `false` if using ISO11783 mode.

void	clear_active_diagnostic_trouble_codes ()
	Clears the list of active DTCs and makes them all inactive.

void	clear_inactive_diagnostic_trouble_codes ()
	Clears the list of inactive DTCs and clears occurrence counts.

void	clear_software_id_fields ()
	Clears all previously configured software ID fields set with set_software_id_field.

void	set_ecu_id_field (ECUIdentificationFields field, const std::string &value)
	Sets one of the ECU identification strings for the ECU ID message.

bool	set_diagnostic_trouble_code_active (const DiagnosticTroubleCode &dtc, bool active)
	Adds a DTC to the active list, or removes one from the active list.

bool	get_diagnostic_trouble_code_active (const DiagnosticTroubleCode &dtc)
	Returns if a DTC is active.

bool	set_product_identification_code (const std::string &value)
	Sets the product ID code used in the diagnostic protocol "Product Identification" message (PGN 0xFC8D)

bool	set_product_identification_brand (const std::string &value)
	Sets the product identification brand used in the diagnostic protocol "Product Identification" message (PGN 0xFC8D)

bool	set_product_identification_model (const std::string &value)
	Sets the product identification model used in the diagnostic protocol "Product Identification" message (PGN 0xFC8D)

void	set_software_id_field (std::uint32_t index, const std::string &value)
	Adds an ascii string to this internal control function's software ID.

bool	suspend_broadcasts (std::uint16_t suspendTime_seconds=0xFFFF)
	Informs the diagnostic protocol that you are going to suspend broadcasts.

bool	get_broadcast_state () const
	Gets the current broadcast state for the connected network type.

Public Attributes
ControlFunctionFunctionalities	ControlFunctionFunctionalitiesMessageInterface
	Use this interface to configure your CF's functionalities. This info will be reported to any ECU that requests it and you are required to support it on an ISOBUS.

Private Types
enum class	Lamps { MalfunctionIndicatorLamp , RedStopLamp , AmberWarningLamp , ProtectLamp }
	Lists the different lamps in J1939-73. More...

enum class	FlashState { Solid , Slow , Fast }
	Enumerates lamp flash states in J1939. More...

enum class	DM22ControlByte : std::uint8_t { RequestToClearPreviouslyActiveDTC = 0x01 , PositiveAcknowledgeOfPreviouslyActiveDTCClear = 0x02 , NegativeAcknowledgeOfPreviouslyActiveDTCClear = 0x03 , RequestToClearActiveDTC = 0x11 , PositiveAcknowledgeOfActiveDTCClear = 0x12 , NegativeAcknowledgeOfActiveDTCClear = 0x13 }
	The DM22 multiplexer bytes. All bytes not given a value here are reserved by SAE. More...

enum class	DM22NegativeAcknowledgeIndicator : std::uint8_t { General = 0x00 , AccessDenied = 0x01 , UnknownOrDoesNotExist = 0x02 , DTCNoLongerPreviouslyActive = 0x03 , DTCNoLongerActive = 0x04 }
	The negative acknowledge (NACK) reasons for a DM22 message. More...

Private Member Functions
std::uint8_t	convert_flash_state_to_byte (FlashState flash) const
	A utility function to get the CAN representation of a FlashState.

void	get_active_list_lamp_state_and_flash_state (Lamps targetLamp, FlashState &flash, bool &lampOn) const
	This is a way to find the overall lamp states to report.

void	get_inactive_list_lamp_state_and_flash_state (Lamps targetLamp, FlashState &flash, bool &lampOn) const
	This is a way to find the overall lamp states to report.

void	on_address_violation (std::shared_ptr< InternalControlFunction > affectedControlFunction)
	A callback function used to consume address violation events and activate a DTC as required in ISO11783-5.

bool	send_diagnostic_message_1 () const
	Sends a DM1 encoded CAN message.

bool	send_diagnostic_message_2 () const
	Sends a DM2 encoded CAN message.

bool	send_diagnostic_protocol_identification () const
	Sends a message that identifies which diagnostic protocols are supported.

bool	send_dm13_announce_suspension (std::uint16_t suspendTime_seconds) const
	Sends the DM13 to alert network devices of impending suspended broadcasts.

bool	send_ecu_identification () const
	Sends the ECU ID message.

bool	send_product_identification () const
	Sends the product identification message (PGN 0xFC8D)

bool	send_software_identification () const
	Sends the software ID message.

bool	process_all_dm22_responses ()
	Processes any DM22 responses from the queue.

void	process_message (const CANMessage &message)
	A generic way for a protocol to process a received message.

bool	parse_j1939_network_states (const CANMessage &message)
	Parses out the DM13 J1939 network states from a CAN message.

bool	process_parameter_group_number_request (std::uint32_t parameterGroupNumber, std::shared_ptr< ControlFunction > requestingControlFunction, bool &acknowledge, AcknowledgementType &acknowledgementType)
	Handles PGN requests for the diagnostic protocol.

Static Private Member Functions
static void	process_message (const CANMessage &message, void *parent)
	A generic way for a protocol to process a received message.

static bool	process_parameter_group_number_request (std::uint32_t parameterGroupNumber, std::shared_ptr< ControlFunction > requestingControlFunction, bool &acknowledge, AcknowledgementType &acknowledgementType, void *parentPointer)

static void	process_flags (std::uint32_t flag, void *parentPointer)
	A generic callback for a the class to process flags from the `ProcessingFlags`

Private Attributes
std::shared_ptr< InternalControlFunction >	myControlFunction
	The internal control function that this protocol will send from.

EventCallbackHandle	addressViolationEventHandle
	Stores the handle from registering for address violation events.

NetworkType	networkType
	The diagnostic network type that this protocol will use.

std::vector< DiagnosticTroubleCode >	activeDTCList
	Keeps track of all the active DTCs.

std::vector< DiagnosticTroubleCode >	inactiveDTCList
	Keeps track of all the previously active DTCs.

std::vector< DM22Data >	dm22ResponseQueue
	Maintaining a list of DM22 responses we need to send to allow for retrying in case of Tx failures.

std::vector< std::string >	ecuIdentificationFields
	Stores the ECU ID fields so we can transmit them when ECU ID's PGN is requested.

std::vector< std::string >	softwareIdentificationFields
	Stores the Software ID fields so we can transmit them when the PGN is requested.

ProcessingFlags	txFlags
	An instance of the processing flags to handle retries of some messages.

std::string	productIdentificationCode
	The product identification code for sending the product identification message.

std::string	productIdentificationBrand
	The product identification brand for sending the product identification message.

std::string	productIdentificationModel
	The product identification model name for sending the product identification message.

std::uint32_t	lastDM1SentTimestamp = 0
	A timestamp in milliseconds of the last time a DM1 was sent.

std::uint32_t	lastDM13ReceivedTimestamp = 0
	A timestamp in milliseconds when we last got a DM13 message.

std::uint16_t	customDM13SuspensionTime = 0
	If using a non-standard DM13 suspension time, this tracks that duration in milliseconds.

bool	broadcastState = true
	Bitfield for tracking the network broadcast state for DM13.

bool	j1939Mode = false
	Tells the protocol to operate according to J1939 instead of ISO11783.

bool	initialized = false
	Stores if the interface has been initialized.

Static Private Attributes
static constexpr std::uint32_t	DM_MAX_FREQUENCY_MS = 1000
	You are technically allowed to send more than this under limited circumstances, but a hard limit saves 4 RAM bytes per DTC and has BAM benefits.

static constexpr std::uint32_t	DM13_HOLD_SIGNAL_TRANSMIT_INTERVAL_MS = 5000
	Defined in 5.7.13.13 SPN 1236.

static constexpr std::uint32_t	DM13_TIMEOUT_MS = 6000
	The timeout in 5.7.13 after which nodes shall revert back to the normal broadcast state.

static constexpr std::uint16_t	MAX_PAYLOAD_SIZE_BYTES = 1785
	DM 1 and 2 are limited to the BAM message max, because ETP does not allow global destinations.

static constexpr std::uint16_t	MAX_DM13_CUSTOM_SUSPEND_TIME_MS = 64255
	The max valid value for a DM13 suspension time in milliseconds.

static constexpr std::uint8_t	DM_PAYLOAD_BYTES_PER_DTC = 4
	The number of payload bytes per DTC that gets encoded into the messages.

static constexpr std::uint8_t	PRODUCT_IDENTIFICATION_MAX_STRING_LENGTH = 50
	The max string length allowed in the fields of product ID, as defined in ISO 11783-12.

static constexpr std::uint8_t	DM13_NUMBER_OF_J1939_NETWORKS = 11
	The number of networks in DM13 that are set aside for J1939.

static constexpr std::uint8_t	DM13_NETWORK_BITMASK = 0x03
	Used to mask the network SPN values.

static constexpr std::uint8_t	DM13_BITS_PER_NETWORK = 2
	Number of bits for the network SPNs.

Detailed Description

Manages the DM1, DM2, and DM3 messages for ISO11783 or J1939.

Definition at line 54 of file isobus_diagnostic_protocol.hpp.

Member Enumeration Documentation

◆ DM22ControlByte

enum class isobus::DiagnosticProtocol::DM22ControlByte : std::uint8_t

strongprivate

The DM22 multiplexer bytes. All bytes not given a value here are reserved by SAE.

Enumerator
RequestToClearPreviouslyActiveDTC	Clear a previously active DTC.
PositiveAcknowledgeOfPreviouslyActiveDTCClear	ACK for clearing a previously active DTC.
NegativeAcknowledgeOfPreviouslyActiveDTCClear	NACK for clearing a previously active DTC.
RequestToClearActiveDTC	Clear an active DTC.
PositiveAcknowledgeOfActiveDTCClear	ACK clearing an active DTC.
NegativeAcknowledgeOfActiveDTCClear	NACK clearing an active DTC.

Definition at line 347 of file isobus_diagnostic_protocol.hpp.

◆ DM22NegativeAcknowledgeIndicator

enum class isobus::DiagnosticProtocol::DM22NegativeAcknowledgeIndicator : std::uint8_t

strongprivate

The negative acknowledge (NACK) reasons for a DM22 message.

Enumerator
General	General negative acknowledge.
AccessDenied	Security denied access.
UnknownOrDoesNotExist	The DTC is unknown or does not exist.
DTCNoLongerPreviouslyActive	The DTC in in the active list but it was requested to clear from inactive list.
DTCNoLongerActive	DTC is inactive, not active, but active was requested to be cleared.

Definition at line 358 of file isobus_diagnostic_protocol.hpp.

◆ ECUIdentificationFields

enum class isobus::DiagnosticProtocol::ECUIdentificationFields : std::uint8_t

strong

Enumerates the different fields in the ECU identification message.

Enumerator
PartNumber	The part number of the physical ECU.
SerialNumber	The serial number of the physical ECU.
Location	The location of the ECU within a network.
Type	The type of ECU. One example of a use of the ECU type could be for classifying ECU capabilities, such as I/O.
ManufacturerName	Manufacturer name string.
HardwareID	ISO 11783 only, This parameter is used to associate the hardware version of an ECU connected to the ISO 11783 network to a conformance test report of that hardware.
NumberOfFields	The number of fields currently defined in the ISO standard.

Definition at line 58 of file isobus_diagnostic_protocol.hpp.

◆ FailureModeIdentifier

enum class isobus::DiagnosticProtocol::FailureModeIdentifier

strong

FMI as defined in ISO11783-12 Annex E.

Enumerator
DataValidAboveNormalMostSevere	Condition is above normal as determined by the predefined most severe level limits for that particular measure of the condition.
DataValidBelowNormalMostSevere	Condition is below normal as determined by the predefined most severe level limits for that particular measure of the condition.
DataErratic	Erratic or intermittent data include all measurements that change at a rate not considered possible in real - world conditions.
VoltageAboveNormal	A voltage signal, data or otherwise, is above the predefined limits that bound the range.
VoltageBelowNormal	A voltage signal, data or otherwise, is below the predefined limits that bound the range.
CurrentBelowNormal	A current signal, data or otherwise, is below the predefined limits that bound the range.
CurrentAboveNormal	A current signal, data or otherwise, is above the predefined limits that bound the range.
MechanicalSystemNotResponding	Any fault that is detected as the result of an improper mechanical adjustment, an improper response or action of a mechanical system.
AbnormalFrequency	Any frequency or PWM signal that is outside the predefined limits which bound the signal range for frequency or duty cycle.
AbnormalUpdateRate	Any failure that is detected when receipt of data through the data network is not at the update rate expected or required.
AbnormalRateOfChange	Any data, exclusive of FMI 2, that are considered valid but which are changing at a rate that is outside the predefined limits that bound the rate of change for the system.
RootCauseNotKnown	It has been detected that a failure has occurred in a particular subsystem but the exact nature of the fault is not known.
BadIntelligentDevice	Internal diagnostic procedures have determined that the failure is one which requires the replacement of the ECU.
OutOfCalibration	A failure that can be identified as the result of improper calibration.
SpecialInstructions	Used when the on-board system can isolate the failure to a small number of choices but not to a single point of failure. See 11783-12 Annex E.
DataValidAboveNormalLeastSevere	Condition is above what would be considered normal as determined by the predefined least severe level limits for that particular measure of the condition.
DataValidAboveNormalModeratelySevere	Condition is above what would be considered normal as determined by the predefined moderately severe level limits for that particular measure of the condition.
DataValidBelowNormalLeastSevere	Condition is below what would be considered normal as determined by the predefined least severe level limits for that particular measure of the condition.
DataValidBelowNormalModeratelySevere	Condition is below what would be considered normal as determined by the predefined moderately severe level limits for that particular measure of the condition.
ReceivedNetworkDataInError	Any failure that is detected when the data received through the network are found replaced by the �error indicator� value 0xFE.
ConditionExists	The condition that is identified by the SPN exists when no applicable FMI exists (any other error)

Definition at line 88 of file isobus_diagnostic_protocol.hpp.

◆ FlashState

enum class isobus::DiagnosticProtocol::FlashState

strongprivate

Enumerates lamp flash states in J1939.

Enumerator
Solid	Solid / no flash.
Slow	Slow flash.
Fast	Fast flash.

Definition at line 339 of file isobus_diagnostic_protocol.hpp.

◆ Lamps

enum class isobus::DiagnosticProtocol::Lamps

strongprivate

Lists the different lamps in J1939-73.

Enumerator
MalfunctionIndicatorLamp	The "MIL".
RedStopLamp	The "RSL".
AmberWarningLamp	The "AWL".
ProtectLamp	The engine protect lamp.

Definition at line 330 of file isobus_diagnostic_protocol.hpp.

◆ LampStatus

enum class isobus::DiagnosticProtocol::LampStatus

strong

The DTC lamp status as defined in J1939-73. Not used when in ISO11783 mode.

Enumerator
MalfunctionIndicatorLampSolid	A lamp used to relay only emissions-related trouble code information.
MalfunctionIndicatorLampSlowFlash	A lamp used to relay only emissions-related trouble code information.
MalfunctionIndicatorLampFastFlash	A lamp used to relay only emissions-related trouble code information.
RedStopLampSolid	This lamp is used to relay trouble code information that is of a severe-enough condition that it warrants stopping the vehicle.
RedStopLampSlowFlash	This lamp is used to relay trouble code information that is of a severe-enough condition that it warrants stopping the vehicle.
RedStopLampFastFlash	This lamp is used to relay trouble code information that is of a severe-enough condition that it warrants stopping the vehicle.
AmberWarningLampSolid	This lamp is used to relay trouble code information that is reporting a problem with the vehicle system but the vehicle need not be immediately stopped.
AmberWarningLampSlowFlash	This lamp is used to relay trouble code information that is reporting a problem with the vehicle system but the vehicle need not be immediately stopped.
AmberWarningLampFastFlash	This lamp is used to relay trouble code information that is reporting a problem with the vehicle system but the vehicle need not be immediately stopped.
EngineProtectLampSolid	This lamp is used to relay trouble code information that is reporting a problem with a vehicle system that is most probably not electronic sub-system related.
EngineProtectLampSlowFlash	This lamp is used to relay trouble code information that is reporting a problem with a vehicle system that is most probably not electronic sub-system related.
EngineProtectLampFastFlash	This lamp is used to relay trouble code information that is reporting a problem with a vehicle system that is most probably not electronic sub-system related.

Definition at line 70 of file isobus_diagnostic_protocol.hpp.

◆ NetworkType

enum class isobus::DiagnosticProtocol::NetworkType : std::uint8_t

strong

Enumerates the different networks in the DM13.

Definition at line 128 of file isobus_diagnostic_protocol.hpp.

◆ StopStartCommand

enum class isobus::DiagnosticProtocol::StopStartCommand : std::uint8_t

strong

Enumerates the commands in the DM13.

Enumerator
StopBroadcast	Stop broadcast.
StartBroadcast	Start broadcast.
Reserved	SAE Reserved.
DontCareNoAction	Don’t Care/take no action (leave as is)

Definition at line 153 of file isobus_diagnostic_protocol.hpp.

◆ SuspendSignalState

enum class isobus::DiagnosticProtocol::SuspendSignalState : std::uint8_t

strong

Enumerates the different suspend signals for DM13.

Enumerator
IndefiniteSuspension	Indefinite suspension of all broadcasts.
PartialIndefiniteSuspension	Indefinite suspension of some messages.
TemporarySuspension	Temporary suspension of all broadcasts.
PartialTemporarySuspension	Temporary suspension of some messages.
Resuming	Resuming normal broadcast pattern.

Definition at line 162 of file isobus_diagnostic_protocol.hpp.

◆ TransmitFlags

enum class isobus::DiagnosticProtocol::TransmitFlags

strong

A set of transmit flags to manage sending DM1, DM2, and protocol ID.

Enumerator
DM1	A flag to manage sending the DM1 message.
DM2	A flag to manage sending the DM2 message.
DiagnosticProtocolID	A flag to manage sending the Diagnostic protocol ID message.
ProductIdentification	A flag to manage sending the product identification message.
DM22	Process queued up DM22 responses.
ECUIdentification	A flag to manage sending the ECU ID message.
SoftwareIdentification	A flag to manage sending the software ID message.
NumberOfFlags	The number of flags in the enum.

Definition at line 114 of file isobus_diagnostic_protocol.hpp.

Constructor & Destructor Documentation

◆ DiagnosticProtocol()

isobus::DiagnosticProtocol::DiagnosticProtocol	(	std::shared_ptr< InternalControlFunction >	internalControlFunction,
		NetworkType	networkType = NetworkType::ProprietaryNetwork1 )

The constructor for this protocol.

Parameters

[in]	internalControlFunction	The internal control function that owns this protocol and will be used to send messages
[in]	networkType	The type of diagnostic network that this protocol will reflect

Definition at line 77 of file isobus_diagnostic_protocol.cpp.

◆ ~DiagnosticProtocol()

isobus::DiagnosticProtocol::~DiagnosticProtocol ( )

The destructor for this protocol.

Definition at line 91 of file isobus_diagnostic_protocol.cpp.

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Member Function Documentation

◆ clear_active_diagnostic_trouble_codes()

void isobus::DiagnosticProtocol::clear_active_diagnostic_trouble_codes ( )

Clears the list of active DTCs and makes them all inactive.

Definition at line 205 of file isobus_diagnostic_protocol.cpp.

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◆ clear_inactive_diagnostic_trouble_codes()

void isobus::DiagnosticProtocol::clear_inactive_diagnostic_trouble_codes ( )

Clears the list of inactive DTCs and clears occurrence counts.

Definition at line 216 of file isobus_diagnostic_protocol.cpp.

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◆ clear_software_id_fields()

void isobus::DiagnosticProtocol::clear_software_id_fields ( )

Clears all previously configured software ID fields set with set_software_id_field.

Definition at line 221 of file isobus_diagnostic_protocol.cpp.

◆ convert_flash_state_to_byte()

std::uint8_t isobus::DiagnosticProtocol::convert_flash_state_to_byte ( FlashState flash ) const

private

A utility function to get the CAN representation of a FlashState.

Parameters

flash The flash state to convert

Returns: The two bit lamp state for CAN

Definition at line 377 of file isobus_diagnostic_protocol.cpp.

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◆ get_active_list_lamp_state_and_flash_state()

void isobus::DiagnosticProtocol::get_active_list_lamp_state_and_flash_state	(	Lamps	targetLamp,
		FlashState &	flash,
		bool &	lampOn ) const

private

This is a way to find the overall lamp states to report.

This searches the active DTC list to find if a lamp is on or off, and to find the overall flash state for that lamp. Basically, since the lamp states are global to the CAN message, we need a way to resolve the "total" lamp state from the list.

Parameters

[in]	targetLamp	The lamp to find the status of
[out]	flash	How the lamp should be flashing
[out]	lampOn	If the lamp state is on for any DTC

Definition at line 404 of file isobus_diagnostic_protocol.cpp.

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◆ get_broadcast_state()

bool isobus::DiagnosticProtocol::get_broadcast_state ( ) const

Gets the current broadcast state for the connected network type.

Returns: True if broadcasts are currently allowed, false if broadcasts are suspended for the connected network

Definition at line 372 of file isobus_diagnostic_protocol.cpp.

◆ get_diagnostic_trouble_code_active()

bool isobus::DiagnosticProtocol::get_diagnostic_trouble_code_active ( const DiagnosticTroubleCode & dtc )

Returns if a DTC is active.

Parameters

[in] dtc A diagnostic trouble code whose state should be altered

Returns: true if the DTC was in the active list

Definition at line 299 of file isobus_diagnostic_protocol.cpp.

◆ get_inactive_list_lamp_state_and_flash_state()

void isobus::DiagnosticProtocol::get_inactive_list_lamp_state_and_flash_state	(	Lamps	targetLamp,
		FlashState &	flash,
		bool &	lampOn ) const

private

This is a way to find the overall lamp states to report.

This searches the inactive DTC list to find if a lamp is on or off, and to find the overall flash state for that lamp. Basically, since the lamp states are global to the CAN message, we need a way to resolve the "total" lamp state from the list.

Parameters

[in]	targetLamp	The lamp to find the status of
[out]	flash	How the lamp should be flashing
[out]	lampOn	If the lamp state is on for any DTC

Definition at line 507 of file isobus_diagnostic_protocol.cpp.

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◆ get_initialized()

bool isobus::DiagnosticProtocol::get_initialized ( ) const

Returns if the protocol has been initialized.

Returns: true if the protocol has been initialized, otherwise false

Definition at line 127 of file isobus_diagnostic_protocol.cpp.

◆ get_j1939_mode()

bool isobus::DiagnosticProtocol::get_j1939_mode ( ) const

Returns true if the protocol is in J1939 mode instead of ISO11783 mode, false if using ISO11783 mode.

Returns: true if the protocol is in J1939 mode instead of ISO11783 mode, false if using ISO11783 mode

Definition at line 200 of file isobus_diagnostic_protocol.cpp.

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◆ initialize()

bool isobus::DiagnosticProtocol::initialize ( )

The protocol's initializer function.

Returns: true if the protocol was initialized, false if it was already initialized

Definition at line 96 of file isobus_diagnostic_protocol.cpp.

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◆ on_address_violation()

void isobus::DiagnosticProtocol::on_address_violation ( std::shared_ptr< InternalControlFunction > affectedControlFunction )

private

A callback function used to consume address violation events and activate a DTC as required in ISO11783-5.

Parameters

[in] affectedControlFunction The control function affected by an address violation

Definition at line 610 of file isobus_diagnostic_protocol.cpp.

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◆ parse_j1939_network_states()

bool isobus::DiagnosticProtocol::parse_j1939_network_states ( const CANMessage & message )

private

Parses out the DM13 J1939 network states from a CAN message.

Parameters

[in] message The message to parse from

Returns: true if the message was parsed, false if the message was invalid

Definition at line 1102 of file isobus_diagnostic_protocol.cpp.

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◆ process_all_dm22_responses()

bool isobus::DiagnosticProtocol::process_all_dm22_responses ( )

private

Processes any DM22 responses from the queue.

We queue responses so that we can do Tx retries if needed

Returns: true if queue was completely processed, false if messages remain that could not be sent

Definition at line 892 of file isobus_diagnostic_protocol.cpp.

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◆ process_flags()

void isobus::DiagnosticProtocol::process_flags	(	std::uint32_t	flag,
		void *	parentPointer )

staticprivate

A generic callback for a the class to process flags from the ProcessingFlags

Parameters

[in]	flag	The flag to process
[in]	parentPointer	A generic context pointer to reference a specific instance of this protocol in the callback

Definition at line 1309 of file isobus_diagnostic_protocol.cpp.

◆ process_message() [1/2]

void isobus::DiagnosticProtocol::process_message ( const CANMessage & message )

private

A generic way for a protocol to process a received message.

Parameters

[in] message A received CAN message

Definition at line 954 of file isobus_diagnostic_protocol.cpp.

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◆ process_message() [2/2]

void isobus::DiagnosticProtocol::process_message	(	const CANMessage &	message,
		void *	parent )

staticprivate

A generic way for a protocol to process a received message.

Parameters

[in]	message	A received CAN message
[in]	parent	Provides the context to the actual TP manager object

Definition at line 1094 of file isobus_diagnostic_protocol.cpp.

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◆ process_parameter_group_number_request() [1/2]

bool isobus::DiagnosticProtocol::process_parameter_group_number_request	(	std::uint32_t	parameterGroupNumber,
		std::shared_ptr< ControlFunction >	requestingControlFunction,
		bool &	acknowledge,
		AcknowledgementType &	acknowledgementType )

private

Handles PGN requests for the diagnostic protocol.

Parameters

[in]	parameterGroupNumber	The PGN being requested
[in]	requestingControlFunction	The control function that is requesting the PGN
[out]	acknowledge	Tells the PGN request protocol if it should respond to the request
[out]	acknowledgementType	The type of acknowledgement to send to the requestor

Returns: true if any callback was able to handle the PGN request

Definition at line 1211 of file isobus_diagnostic_protocol.cpp.

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◆ process_parameter_group_number_request() [2/2]

bool isobus::DiagnosticProtocol::process_parameter_group_number_request	(	std::uint32_t	parameterGroupNumber,
		std::shared_ptr< ControlFunction >	requestingControlFunction,
		bool &	acknowledge,
		AcknowledgementType &	acknowledgementType,
		void *	parentPointer )

staticprivate

Parameters

[in]	parameterGroupNumber	The PGN being requested
[in]	requestingControlFunction	The control function that is requesting the PGN
[out]	acknowledge	Tells the PGN request protocol if it should respond to the request
[out]	acknowledgementType	The type of acknowledgement to send to the requestor
[in]	parentPointer	Generic context variable, usually a pointer to the class that the callback was registered for

Returns: true if any callback was able to handle the PGN request

Definition at line 1294 of file isobus_diagnostic_protocol.cpp.

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◆ send_diagnostic_message_1()

bool isobus::DiagnosticProtocol::send_diagnostic_message_1 ( ) const

private

Sends a DM1 encoded CAN message.

Returns: true if the message was sent, otherwise false

Encode Protect state and flash

Encode amber warning lamp state and flash

Encode red stop lamp state and flash

Encode malfunction indicator lamp state and flash

Definition at line 626 of file isobus_diagnostic_protocol.cpp.

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◆ send_diagnostic_message_2()

bool isobus::DiagnosticProtocol::send_diagnostic_message_2 ( ) const

private

Sends a DM2 encoded CAN message.

Returns: true if the message was sent, otherwise false

Encode Protect state and flash

Encode amber warning lamp state and flash

Encode red stop lamp state and flash

Encode malfunction indicator lamp state and flash

Definition at line 714 of file isobus_diagnostic_protocol.cpp.

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◆ send_diagnostic_protocol_identification()

bool isobus::DiagnosticProtocol::send_diagnostic_protocol_identification ( ) const

private

Sends a message that identifies which diagnostic protocols are supported.

Returns: true if the message was sent, otherwise false

Bit 1 = J1939-73, Bit 2 = ISO 14230, Bit 3 = ISO 15765-3, else Reserved

Definition at line 802 of file isobus_diagnostic_protocol.cpp.

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◆ send_dm13_announce_suspension()

bool isobus::DiagnosticProtocol::send_dm13_announce_suspension ( std::uint16_t suspendTime_seconds ) const

private

Sends the DM13 to alert network devices of impending suspended broadcasts.

Parameters

suspendTime_seconds The number of seconds that the broadcast will be suspended for

Returns: true if the message was sent, otherwise false

Definition at line 822 of file isobus_diagnostic_protocol.cpp.

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◆ send_ecu_identification()

bool isobus::DiagnosticProtocol::send_ecu_identification ( ) const

private

Sends the ECU ID message.

Returns: true if the message was sent

Definition at line 840 of file isobus_diagnostic_protocol.cpp.

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◆ send_product_identification()

bool isobus::DiagnosticProtocol::send_product_identification ( ) const

private

Sends the product identification message (PGN 0xFC8D)

Returns: true if the message was sent, otherwise false

Definition at line 857 of file isobus_diagnostic_protocol.cpp.

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◆ send_software_identification()

bool isobus::DiagnosticProtocol::send_software_identification ( ) const

private

Sends the software ID message.

Returns: true if the message was sent, otherwise false

Definition at line 868 of file isobus_diagnostic_protocol.cpp.

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◆ set_diagnostic_trouble_code_active()

bool isobus::DiagnosticProtocol::set_diagnostic_trouble_code_active	(	const DiagnosticTroubleCode &	dtc,
		bool	active )

Adds a DTC to the active list, or removes one from the active list.

When you call this function with a DTC and true, it will be added to the DM1 message. When you call it with a DTC and false it will be moved to the inactive list. If you get false as a return value, either the DTC was already in the target state or the data was not valid

Parameters

[in]	dtc	A diagnostic trouble code whose state should be altered
[in]	active	Sets if the DTC is currently active or not

Returns: True if the DTC was added/removed from the list, false if DTC was not valid or target state is invalid

First check to see if it's already in the inactive list

Definition at line 234 of file isobus_diagnostic_protocol.cpp.

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◆ set_ecu_id_field()

void isobus::DiagnosticProtocol::set_ecu_id_field	(	ECUIdentificationFields	field,
		const std::string &	value )

Sets one of the ECU identification strings for the ECU ID message.

See ECUIdentificationFields for a brief description of the fields

Note: The fields in this message are optional and separated by an ASCII "*". It is not necessary to include parametric data for all fields. Any additional ECU identification fields defined in the future will be appended at the end.

Attention: Do not include the "*" character in your field values and only use HardwareID when not in J1939 mode.

Parameters

[in]	field	The field to set
[in]	value	The string value associated with the ECU ID field

Definition at line 226 of file isobus_diagnostic_protocol.cpp.

◆ set_j1939_mode()

void isobus::DiagnosticProtocol::set_j1939_mode ( bool value )

Enables the protocol to run in J1939 mode instead of ISO11783 mode.

See ISO11783-12 and J1939-73 for a complete explanation of the differences

Parameters

[in] value The desired mode. true for J1939 mode, false for ISO11783 mode

Definition at line 195 of file isobus_diagnostic_protocol.cpp.

◆ set_product_identification_brand()

bool isobus::DiagnosticProtocol::set_product_identification_brand ( const std::string & value )

Sets the product identification brand used in the diagnostic protocol "Product Identification" message (PGN 0xFC8D)

The product identification brand specifies the brand of a product. The combination of the product ID code and brand shall make the product unique in the world.

Parameters

value The ascii product brand, up to 50 characters long

Returns: true if the value was set, false if the string is too long

Definition at line 323 of file isobus_diagnostic_protocol.cpp.

◆ set_product_identification_code()

bool isobus::DiagnosticProtocol::set_product_identification_code ( const std::string & value )

Sets the product ID code used in the diagnostic protocol "Product Identification" message (PGN 0xFC8D)

The product identification code, as assigned by the manufacturer, corresponds with the number on the type plate of a product. For vehicles, this number can be the same as the VIN. For stand-alone systems, such as VTs, this number can be the same as the ECU ID number. The combination of the product identification code and brand shall make the product globally unique.

Parameters

value The ascii product identification code, up to 50 characters long

Returns: true if the value was set, false if the string is too long

Definition at line 311 of file isobus_diagnostic_protocol.cpp.

◆ set_product_identification_model()

bool isobus::DiagnosticProtocol::set_product_identification_model ( const std::string & value )

Sets the product identification model used in the diagnostic protocol "Product Identification" message (PGN 0xFC8D)

The product identification model specifies a unique product within a brand.

Parameters

value The ascii model string, up to 50 characters

Returns: true if the value was set, false if the string is too long

Definition at line 335 of file isobus_diagnostic_protocol.cpp.

◆ set_software_id_field()

void isobus::DiagnosticProtocol::set_software_id_field	(	std::uint32_t	index,
		const std::string &	value )

Adds an ascii string to this internal control function's software ID.

Use this to identify the software version of your application. Separate fields will be transmitted with a * delimeter. For example, if your main application's version is 1.00, and you have a bootloader that is version 2.00, you could set field 0 to be "App v1.00" and field 1 to be "Bootloader v2.00", and it will be transmitted on request as: "App v1.00*Bootloader v2.00*" in accordance with ISO 11783-12 You can remove a field by setting it to ""

Parameters

[in]	index	The field index to set
[in]	value	The software ID string to add

Definition at line 347 of file isobus_diagnostic_protocol.cpp.

◆ suspend_broadcasts()

bool isobus::DiagnosticProtocol::suspend_broadcasts ( std::uint16_t suspendTime_seconds = 0xFFFF )

Informs the diagnostic protocol that you are going to suspend broadcasts.

When you call this, DM1 and other broadcasts that come from this protocol will be stopped for the duration specified.

Parameters

[in] suspendTime_seconds If you know the time for which broadcasts will be suspended, put it here, otherwise 0xFFFF

Returns: true if the message was sent, otherwise false

Definition at line 360 of file isobus_diagnostic_protocol.cpp.

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◆ terminate()

void isobus::DiagnosticProtocol::terminate ( )

The protocol's terminate function.

Definition at line 132 of file isobus_diagnostic_protocol.cpp.

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◆ update()

void isobus::DiagnosticProtocol::update ( )

Updates the diagnostic protocol.

Definition at line 156 of file isobus_diagnostic_protocol.cpp.

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Member Data Documentation

◆ activeDTCList

std::vector<DiagnosticTroubleCode> isobus::DiagnosticProtocol::activeDTCList

private

Keeps track of all the active DTCs.

Definition at line 495 of file isobus_diagnostic_protocol.hpp.

◆ addressViolationEventHandle

EventCallbackHandle isobus::DiagnosticProtocol::addressViolationEventHandle

private

Stores the handle from registering for address violation events.

Definition at line 493 of file isobus_diagnostic_protocol.hpp.

◆ broadcastState

bool isobus::DiagnosticProtocol::broadcastState = true

private

Bitfield for tracking the network broadcast state for DM13.

Definition at line 507 of file isobus_diagnostic_protocol.hpp.

◆ ControlFunctionFunctionalitiesMessageInterface

ControlFunctionFunctionalities isobus::DiagnosticProtocol::ControlFunctionFunctionalitiesMessageInterface

Use this interface to configure your CF's functionalities. This info will be reported to any ECU that requests it and you are required to support it on an ISOBUS.

Note: By default, this interface will only report that your ECU is a "Minimum Control Function".

Definition at line 250 of file isobus_diagnostic_protocol.hpp.

◆ customDM13SuspensionTime

std::uint16_t isobus::DiagnosticProtocol::customDM13SuspensionTime = 0

private

If using a non-standard DM13 suspension time, this tracks that duration in milliseconds.

Definition at line 506 of file isobus_diagnostic_protocol.hpp.

◆ DM13_BITS_PER_NETWORK

constexpr std::uint8_t isobus::DiagnosticProtocol::DM13_BITS_PER_NETWORK = 2

staticconstexprprivate

Number of bits for the network SPNs.

Definition at line 387 of file isobus_diagnostic_protocol.hpp.

◆ DM13_HOLD_SIGNAL_TRANSMIT_INTERVAL_MS

constexpr std::uint32_t isobus::DiagnosticProtocol::DM13_HOLD_SIGNAL_TRANSMIT_INTERVAL_MS = 5000

staticconstexprprivate

Defined in 5.7.13.13 SPN 1236.

Definition at line 379 of file isobus_diagnostic_protocol.hpp.

◆ DM13_NETWORK_BITMASK

constexpr std::uint8_t isobus::DiagnosticProtocol::DM13_NETWORK_BITMASK = 0x03

staticconstexprprivate

Used to mask the network SPN values.

Definition at line 386 of file isobus_diagnostic_protocol.hpp.

◆ DM13_NUMBER_OF_J1939_NETWORKS

constexpr std::uint8_t isobus::DiagnosticProtocol::DM13_NUMBER_OF_J1939_NETWORKS = 11

staticconstexprprivate

The number of networks in DM13 that are set aside for J1939.

Definition at line 385 of file isobus_diagnostic_protocol.hpp.

◆ DM13_TIMEOUT_MS

constexpr std::uint32_t isobus::DiagnosticProtocol::DM13_TIMEOUT_MS = 6000

staticconstexprprivate

The timeout in 5.7.13 after which nodes shall revert back to the normal broadcast state.

Definition at line 380 of file isobus_diagnostic_protocol.hpp.

◆ dm22ResponseQueue

std::vector<DM22Data> isobus::DiagnosticProtocol::dm22ResponseQueue

private

Maintaining a list of DM22 responses we need to send to allow for retrying in case of Tx failures.

Definition at line 497 of file isobus_diagnostic_protocol.hpp.

◆ DM_MAX_FREQUENCY_MS

constexpr std::uint32_t isobus::DiagnosticProtocol::DM_MAX_FREQUENCY_MS = 1000

staticconstexprprivate

You are technically allowed to send more than this under limited circumstances, but a hard limit saves 4 RAM bytes per DTC and has BAM benefits.

Definition at line 378 of file isobus_diagnostic_protocol.hpp.

◆ DM_PAYLOAD_BYTES_PER_DTC

constexpr std::uint8_t isobus::DiagnosticProtocol::DM_PAYLOAD_BYTES_PER_DTC = 4

staticconstexprprivate

The number of payload bytes per DTC that gets encoded into the messages.

Definition at line 383 of file isobus_diagnostic_protocol.hpp.

◆ ecuIdentificationFields

std::vector<std::string> isobus::DiagnosticProtocol::ecuIdentificationFields

private

Stores the ECU ID fields so we can transmit them when ECU ID's PGN is requested.

Definition at line 498 of file isobus_diagnostic_protocol.hpp.

◆ inactiveDTCList

std::vector<DiagnosticTroubleCode> isobus::DiagnosticProtocol::inactiveDTCList

private

Keeps track of all the previously active DTCs.

Definition at line 496 of file isobus_diagnostic_protocol.hpp.

◆ initialized

bool isobus::DiagnosticProtocol::initialized = false

private

Stores if the interface has been initialized.

Definition at line 509 of file isobus_diagnostic_protocol.hpp.

◆ j1939Mode

bool isobus::DiagnosticProtocol::j1939Mode = false

private

Tells the protocol to operate according to J1939 instead of ISO11783.

Definition at line 508 of file isobus_diagnostic_protocol.hpp.

◆ lastDM13ReceivedTimestamp

std::uint32_t isobus::DiagnosticProtocol::lastDM13ReceivedTimestamp = 0

private

A timestamp in milliseconds when we last got a DM13 message.

Definition at line 505 of file isobus_diagnostic_protocol.hpp.

◆ lastDM1SentTimestamp

std::uint32_t isobus::DiagnosticProtocol::lastDM1SentTimestamp = 0

private

A timestamp in milliseconds of the last time a DM1 was sent.

Definition at line 504 of file isobus_diagnostic_protocol.hpp.

◆ MAX_DM13_CUSTOM_SUSPEND_TIME_MS

constexpr std::uint16_t isobus::DiagnosticProtocol::MAX_DM13_CUSTOM_SUSPEND_TIME_MS = 64255

staticconstexprprivate

The max valid value for a DM13 suspension time in milliseconds.

Definition at line 382 of file isobus_diagnostic_protocol.hpp.

◆ MAX_PAYLOAD_SIZE_BYTES

constexpr std::uint16_t isobus::DiagnosticProtocol::MAX_PAYLOAD_SIZE_BYTES = 1785

staticconstexprprivate

DM 1 and 2 are limited to the BAM message max, because ETP does not allow global destinations.

Definition at line 381 of file isobus_diagnostic_protocol.hpp.

◆ myControlFunction

std::shared_ptr<InternalControlFunction> isobus::DiagnosticProtocol::myControlFunction

private

The internal control function that this protocol will send from.

Definition at line 492 of file isobus_diagnostic_protocol.hpp.

◆ networkType

NetworkType isobus::DiagnosticProtocol::networkType

private

The diagnostic network type that this protocol will use.

Definition at line 494 of file isobus_diagnostic_protocol.hpp.

◆ PRODUCT_IDENTIFICATION_MAX_STRING_LENGTH

constexpr std::uint8_t isobus::DiagnosticProtocol::PRODUCT_IDENTIFICATION_MAX_STRING_LENGTH = 50

staticconstexprprivate

The max string length allowed in the fields of product ID, as defined in ISO 11783-12.

Definition at line 384 of file isobus_diagnostic_protocol.hpp.

◆ productIdentificationBrand

std::string isobus::DiagnosticProtocol::productIdentificationBrand

private

The product identification brand for sending the product identification message.

Definition at line 502 of file isobus_diagnostic_protocol.hpp.

◆ productIdentificationCode

std::string isobus::DiagnosticProtocol::productIdentificationCode

private

The product identification code for sending the product identification message.

Definition at line 501 of file isobus_diagnostic_protocol.hpp.

◆ productIdentificationModel

std::string isobus::DiagnosticProtocol::productIdentificationModel

private

The product identification model name for sending the product identification message.

Definition at line 503 of file isobus_diagnostic_protocol.hpp.

◆ softwareIdentificationFields

std::vector<std::string> isobus::DiagnosticProtocol::softwareIdentificationFields

private

Stores the Software ID fields so we can transmit them when the PGN is requested.

Definition at line 499 of file isobus_diagnostic_protocol.hpp.

◆ txFlags

ProcessingFlags isobus::DiagnosticProtocol::txFlags

private

An instance of the processing flags to handle retries of some messages.

Definition at line 500 of file isobus_diagnostic_protocol.hpp.

The documentation for this class was generated from the following files:

isobus/include/isobus/isobus/isobus_diagnostic_protocol.hpp
isobus/src/isobus_diagnostic_protocol.cpp

Classes

Public Types

Public Member Functions

Public Attributes

Private Types

Private Member Functions

Static Private Member Functions

Private Attributes

Static Private Attributes

Detailed Description

Member Enumeration Documentation

◆ DM22ControlByte

◆ DM22NegativeAcknowledgeIndicator

◆ ECUIdentificationFields

◆ FailureModeIdentifier

◆ FlashState

◆ Lamps

◆ LampStatus

◆ NetworkType

◆ StopStartCommand

◆ SuspendSignalState

◆ TransmitFlags

Constructor & Destructor Documentation

◆ DiagnosticProtocol()

◆ ~DiagnosticProtocol()

Member Function Documentation

◆ clear_active_diagnostic_trouble_codes()

◆ clear_inactive_diagnostic_trouble_codes()

◆ clear_software_id_fields()

◆ convert_flash_state_to_byte()

◆ get_active_list_lamp_state_and_flash_state()

◆ get_broadcast_state()

◆ get_diagnostic_trouble_code_active()

◆ get_inactive_list_lamp_state_and_flash_state()

◆ get_initialized()

◆ get_j1939_mode()

◆ initialize()

◆ on_address_violation()

◆ parse_j1939_network_states()

◆ process_all_dm22_responses()

◆ process_flags()

◆ process_message() [1/2]

◆ process_message() [2/2]

◆ process_parameter_group_number_request() [1/2]

◆ process_parameter_group_number_request() [2/2]

◆ send_diagnostic_message_1()

◆ send_diagnostic_message_2()

◆ send_diagnostic_protocol_identification()

◆ send_dm13_announce_suspension()

◆ send_ecu_identification()

◆ send_product_identification()

◆ send_software_identification()

◆ set_diagnostic_trouble_code_active()

◆ set_ecu_id_field()

◆ set_j1939_mode()

◆ set_product_identification_brand()

◆ set_product_identification_code()

◆ set_product_identification_model()

◆ set_software_id_field()

◆ suspend_broadcasts()

◆ terminate()

◆ update()

Member Data Documentation

◆ activeDTCList

◆ addressViolationEventHandle

◆ broadcastState

◆ ControlFunctionFunctionalitiesMessageInterface

◆ customDM13SuspensionTime

◆ DM13_BITS_PER_NETWORK

◆ DM13_HOLD_SIGNAL_TRANSMIT_INTERVAL_MS

◆ DM13_NETWORK_BITMASK

◆ DM13_NUMBER_OF_J1939_NETWORKS

◆ DM13_TIMEOUT_MS

◆ dm22ResponseQueue

◆ DM_MAX_FREQUENCY_MS

◆ DM_PAYLOAD_BYTES_PER_DTC

◆ ecuIdentificationFields

◆ inactiveDTCList

◆ initialized

◆ j1939Mode