CN109327372A - A kind of local sleep awakening method of CAN bus Star Network management framework scheme - Google Patents

A kind of local sleep awakening method of CAN bus Star Network management framework scheme Download PDF

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Publication number
CN109327372A
CN109327372A CN201811534615.7A CN201811534615A CN109327372A CN 109327372 A CN109327372 A CN 109327372A CN 201811534615 A CN201811534615 A CN 201811534615A CN 109327372 A CN109327372 A CN 109327372A
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CN
China
Prior art keywords
controller
network management
bus
sub
test
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CN201811534615.7A
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Chinese (zh)
Inventor
龚存昊
王玮
杨法松
刘晓军
陈龙
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安徽江淮汽车集团股份有限公司
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Priority to CN201811534615.7A priority Critical patent/CN109327372A/en
Publication of CN109327372A publication Critical patent/CN109327372A/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • H04L12/40Bus networks
    • H04L12/40006Architecture of a communication node
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • H04L12/40Bus networks
    • H04L12/40006Architecture of a communication node
    • H04L12/40039Details regarding the setting of the power status of a node according to activity on the bus
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • H04L12/40Bus networks
    • H04L2012/40208Bus networks characterized by the use of a particular bus standard
    • H04L2012/40215Controller Area Network CAN
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. local area networks [LAN], wide area networks [WAN]
    • H04L12/40Bus networks
    • H04L2012/40267Bus for use in transportation systems
    • H04L2012/40273Bus for use in transportation systems the transportation system being a vehicle

Abstract

A kind of local sleep awakening method of CAN bus Star Network management framework scheme, it includes: providing: CAN network manages message and multiple controllers corresponding with multiple operations, the CAN network management message is based on OESK network management message format and includes destination address DA and network management state position CF, when vehicle executes the operation, message, which is managed, by the CAN network only wakes up the related controller with the operation, and the controller unrelated with the operation does not wake up then, still in dormant state, to reduce the amount controller being waken up, the amount controller of wake-up is reduced to and minimum effectively prevent discharged or defective battery by localized network dormancy awakening through the invention.

Description

A kind of local sleep awakening method of CAN bus Star Network management framework scheme

Technical field

A kind of local sleep awakening method of the present invention about CAN bus Star Network management framework scheme.

Background technique

CAN bus network management at present is very wide in vehicle application range, with the continuous upgrading of automotive engineering, vehicle-mounted control Device quantity processed is continuously increased so that vehicle quiescent dissipation is continuously increased, to reduce vehicle quiescent dissipation, need network quickly into Enter dormant state, prevents vehicle from power shortage occur.

Prior art CAN bus mainly applies OSEK network management strategy, and the feature of strategy maximum has:

1, all management nodes are subjected to suspend mode and wake-up with chain type regular " binding ";

2, the dormancy awakening function of all-network management node is controlled with synchronous suspend mode using synchronized wake-up, it is whole to guarantee Vehicle can enter quiescent dissipation.

The disadvantage of OESK network management maximum is synchronized wake-up and synchronous suspend mode, because with vehicle piggyback controller number Amount increases, and the number of nodes with Network Management Function also increases therewith, if car owner only executes a certain simple function (such as open car door and take packet), according to OESK network management strategy, then all nodes with network function of vehicle are waken up, Suspend mode can just be entered after continuing for some time, the power consumption of vehicle battery is also increased while resulting in waste of resources.

Summary of the invention

The purpose of the present invention is: propose a kind of local sleep wake-up based on CAN bus Star Network management framework scheme Strategy and method, the strategy can be carried out with current OESK network management strategy mode it is compatible, can according to accumulator capacity into Row automatically switches, and can also carry out initiative switching according to user's use habit.

To realize the above-mentioned technical purpose, stop the part that the present invention provides a kind of CAN bus Star Network management framework scheme Dormancy awakening method comprising: provide: CAN network manages message and multiple controllers corresponding with multiple operations, the CAN Network management message is based on OESK network management message format and includes destination address DA and network management state position CF, in which: When vehicle executes the operation, by the CAN network manage message only wake up with the related controller of the operation, and with The unrelated controller of the operation does not wake up then, still in dormant state, to reduce the amount controller being waken up.

The present invention can be carried out with current OESK network management strategy mode it is compatible, when car owner onboard executes a certain operation When, localized network dormancy awakening strategy through the invention, the amount controller of wake-up is reduced to it is minimum, and with this item operate Unrelated controller node does not wake up then, still in dormant state.It, can be effective to realize the power consumption for reducing vehicle battery Prevent discharged or defective battery.

As a further improvement, state of the local sleep awakening method on the vehicle: it is defaulted as opening state State, or be open state when battery remaining capacity is low, or think to control open and-shut mode.

As a further improvement, be added into the CAN network management message: local sleep wakes up open position ST, divides Organize place number position NO and across a group wake-up number position CT;Multiple controllers are at least divided into first group and second group two Group, includes: master controller and by multiple sub-controllers in each group, the master controller respectively with multiple sub- controls Mutual CAN bus communication is carried out between device processed;State of the local sleep awakening method on the vehicle is recorded in institute It states local sleep and wakes up open position ST, number position NO where the sub-controller is recorded in the grouping.

As a further improvement, when wake actions occurs in the controller in first group, described first group is waken up first In master controller, the sub-controller in described first group detect the master controller in described first group wake up after can call out It wakes up, all controllers in described second group are in suspend mode;And after the master controller in described first group confirms suspend mode, then All sub-controllers in described first group also enter suspend mode therewith.

As a further improvement, as the master controller in described first group is functionally needed using in described second group A sub-controller when, then by the master controller in described first group by sending containing described across group waking up number position CT The CAN bus network management message individually to wake up and control the sub-controller in described second group, and described second Other sub-controllers in group are not waken up;And after the master controller in described first group enters suspend mode, in described first group Sub-controller and across group wake up described second group in the sub-controller also enter suspend mode.

As a further improvement, it is also added into the CAN network management message: controller self-test position ZJ, the control Device self-test processed position ZJ records the controller self-test qualification or status of fail;When the controller self-test qualification, the controller It can be carried out the normal CAN bus communication;When the controller fail self-test, the controller is persistently sent described in 1000ms Controller self-test position ZJ be failure CAN network management message after automatically into offline situation and can neither receive can not Message is sent, and the controller can be attempted to send a frame message confirms whether its failure is extensive toward in CAN bus every 1000ms It is multiple.

As a further improvement, be also added into the CAN network management message: controller failure position RB and suspend mode are called out Wake up reason position REA;When the controller fail self-test, the controller failure position RB records the controller and self-test mistake occurs The fault type number lost;And dormancy awakening reason position REA records preset dormancy awakening reason.

As a further improvement, when the master controller fail self-test in described first group, then in described first group The controller self-test position ZJ that master controller persistently sends 1000ms first in CAN bus is the CAN network to fail Management message informs all sub-controllers in described first group, and main control after 1000ms, in described first group Device automatically disengages bus, and all sub-controllers in described first group will shield the main controller controls in described first group at this time Network management, and transfer take OSEK network management mechanism to carry out building ring control, to achieve the purpose that synchronous suspend mode;If with The fault recovery of master controller in described first group afterwards, can continuously send out controller self-test position described in three frames in CAN bus ZJ is that the qualified CAN network manages message, can again after all sub-controllers in described first group detect the state Become by the network management of the main controller controls in described first group.

The present invention realizes unified suspend mode to realize the wakeup logic of " one-to-many " and the dormancy awakening control of each grouping With independence.

Specific embodiment

The present invention provides a kind of local sleep awakening method of CAN bus Star Network management framework scheme comprising: it mentions For: CAN network manages message and multiple controllers corresponding with multiple operations, and the CAN network management message is based on OESK Network management message format simultaneously includes destination address DA and network management state position CF, in which: when vehicle executes the operation When, message is managed by the CAN network and is only waken up and the related controller of the operation, and the control unrelated with the operation Device does not wake up then, still in dormant state, to reduce the amount controller being waken up.

The present invention can be carried out with current OESK network management strategy mode it is compatible, when car owner onboard executes a certain operation When, localized network dormancy awakening strategy through the invention, the amount controller of wake-up is reduced to it is minimum, and with this item operate Unrelated controller node does not wake up then, still in dormant state.It, can be effective to realize the power consumption for reducing vehicle battery Prevent discharged or defective battery.

As a further improvement, state of the local sleep awakening method on the vehicle: it is defaulted as opening state State, or be open state when battery remaining capacity is low, or think to control open and-shut mode.

As a further improvement, be added into the CAN network management message: local sleep wakes up open position ST, divides Organize place number position NO and across a group wake-up number position CT;Multiple controllers are at least divided into first group and second group two Group, includes: master controller and by multiple sub-controllers in each group, the master controller respectively with multiple sub- controls Mutual CAN bus communication is carried out between device processed;State of the local sleep awakening method on the vehicle is recorded in institute It states local sleep and wakes up open position ST, number position NO where the sub-controller is recorded in the grouping.

As a further improvement, when wake actions occurs in the controller in first group, described first group is waken up first In master controller, the sub-controller in described first group detect the master controller in described first group wake up after can call out It wakes up, all controllers in described second group are in suspend mode;And after the master controller in described first group confirms suspend mode, then All sub-controllers in described first group also enter suspend mode therewith.

As a further improvement, as the master controller in described first group is functionally needed using in described second group A sub-controller when, then by the master controller in described first group by sending containing described across group waking up number position CT The CAN bus network management message individually to wake up and control the sub-controller in described second group, and described second Other sub-controllers in group are not waken up;And after the master controller in described first group enters suspend mode, in described first group Sub-controller and across group wake up described second group in the sub-controller also enter suspend mode.

As a further improvement, it is also added into the CAN network management message: controller self-test position ZJ, the control Device self-test processed position ZJ records the controller self-test qualification or status of fail;When the controller self-test qualification, the controller It can be carried out the normal CAN bus communication;When the controller fail self-test, the controller is persistently sent described in 1000ms Controller self-test position ZJ be failure CAN network management message after automatically into offline situation and can neither receive can not Message is sent, and the controller can be attempted to send a frame message confirms whether its failure is extensive toward in CAN bus every 1000ms It is multiple.

As a further improvement, be also added into the CAN network management message: controller failure position RB and suspend mode are called out Wake up reason position REA;When the controller fail self-test, the controller failure position RB records the controller and self-test mistake occurs The fault type number lost;And dormancy awakening reason position REA records preset dormancy awakening reason.

As a further improvement, when the master controller fail self-test in described first group, then in described first group The controller self-test position ZJ that master controller persistently sends 1000ms first in CAN bus is the CAN network to fail Management message informs all sub-controllers in described first group, and main control after 1000ms, in described first group Device automatically disengages bus, and all sub-controllers in described first group will shield the main controller controls in described first group at this time Network management, and transfer take OSEK network management mechanism to carry out building ring control, to achieve the purpose that synchronous suspend mode;If with The fault recovery of master controller in described first group afterwards, can continuously send out controller self-test position described in three frames in CAN bus ZJ is that the qualified CAN network manages message, can again after all sub-controllers in described first group detect the state Become by the network management of the main controller controls in described first group.

The present invention realizes unified suspend mode to realize the wakeup logic of " one-to-many " and the dormancy awakening control of each grouping With independence.

In the present invention, propose that a kind of local sleep based on CAN bus Star Network management framework scheme wakes up strategy And method, the strategy can be carried out with current OESK network management strategy mode it is compatible, can according to accumulator capacity carry out from Dynamic switching can also carry out initiative switching according to user's use habit.When car owner onboard executes a certain operation, pass through this The localized network dormancy awakening strategy of invention, the amount controller of wake-up is reduced to minimum, and operates unrelated control with this item Device node processed does not wake up then, still in dormant state.To realize the power consumption for reducing vehicle battery, electric power storage can be effectively prevented Pond power shortage.

In a preferred embodiment of the invention, the network management message format that the present invention uses is in OESK network management report Be extended and extend on the basis of literary format, it is therefore intended that facilitate the strategy can with operatively compatible OESK network management, and And it can freely open and close.

Network management message format is as shown in the table:

ID: providing that it is standard frame that CAN bus, which uses, according to ISO11898 agreement, i.e., ID length is 11bi t, the present invention Set the section ID as 0x400-0x4FF be network management message.

DA: destination address: numberical range are as follows: 0x00-0xFF, i.e. the subsequent controllers ID of this controller

CF: network management state position: its numberical range are as follows: 0x00-0xFF;The suspend mode for broadcasting each controller is realized herein Wake request order.(DA and CF are that definition content in OESK management and the present invention are unrelated, therefore do not add to repeat)

ST: local sleep wakes up open position: as ST=0x01, local sleep arousal function is opened;As ST=0x00, Local sleep arousal function is closed.The byte major function is: 1, when battery remaining capacity is lower, can become the byte At 0x01, open part and wake up and suspend mode, be the equal of " electricity-saving function " in mobile phone, 2, can be opened for user's initiative and It closes.The byte default conditions are 0x01 (open state).

N0: number position where grouping: this indicates number of some controller in Full-vehicle CAN bus network, such as certain Controller X belongs to the third node of the first grouping in Full-vehicle CAN bus network, then number position where its NO. grouping is corresponding It is 0x13.

REA: dormancy awakening reason position: range 0x00-0xFF can voluntarily be formulated by designer.

CT: number position is waken up across group: when indicating that a certain group of host node needs to be communicated with the non-master of other groups Wake-up position, range 0x00-0xFF, for example, when A group host node need with B group in non-master communicated when, Need to send non-master number (under normal circumstances, can B group non-master, which wake up, is solely dependent upon B group host node) in B group, it should Number value can be found in shown in NO. definition, as CT=0x00, indicate that current primary node is not needed across group controlling any of other groups Node.

ZJ: controller self-test position: range 0x00-0x01, as ZJ=0x00, controller self-test at this time is qualified, can be into Row normal communication;As ZJ=0x01, controller fail self-test at this time, then controller can persistently send 1000ms in this condition Automatically into offline situation after message, in this state, controller, which can neither receive, can not send message, but controller meeting It attempts to send a frame message toward in CAN bus every 1000ms and confirms whether its failure is restored;When a certain group of master controller goes out When the state of existing ZJ=0x01, remaining node of the group will shield current network management mechanism at this time, and take original OSEK Network management mechanism carries out building ring, achievees the purpose that synchronous suspend mode.

RB: controller failure position: indicate the fault type of controller, range 0x00-0xFF are indicated when controller When ZJ (controller self-test position)=0x01, i.e., controller fail self-test when, controller occur fail self-test fault type compile Number.

The control method embodiment of invention:

In the present invention, vehicle uses vehicle network management star schema scheme, such as: in the Full-vehicle CAN bus network There are A, B, C, D, E, F, G, H, I, J to have 10 controllers altogether, we classify 10 controllers, and the principle of classification is The controller communicated between correlation is divided into one group, such as A needs to carry out mutual CAN bus with tetra- nodes of BCDE Communication, and F needs to carry out mutual CAN bus communications with tetra- nodes of GHI J, is based on the logic, we are by vehicle CAN bus net Network is divided into two groups, in this two groups, selects one of controller (i.e. A and F) as leading control node respectively, works as controller When appearance wake actions, waken up first by leading control node, after which wakes up, the control of place grouping Device detects can wake up after leading controller wakes up, similarly, after master node control confirms suspend mode in the grouping, then this point All non-master controllers of group also enter suspend mode therewith, to realize that the grouping unifies suspend mode to realize " one-to-many " Wakeup logic and the dormancy awakening of each grouping, which control, has independence.

If grouping (may be considered one group) functionally needs (to may be considered two using B group where controller A at this time Group) non-master controller, then the position CT by the host node in one group by CAN bus network management message, i.e., in table 1 The non-master controller for controlling two groups, when receiving the corresponding CAN bus network management message of one group of host node for two groups, meeting Individually wake up (two groups of remaining nodes will not be waken up), two group controllers being waken up at this time by one group master node control into Row control, after one group of master node control enters suspend mode, one group of non-master controller and across group wake up two groups it is non- Master node control also enters suspend mode.

If the master node control where master node control A in grouping (i.e. one group) breaks down at this time, main section Base site controller sends ZJ=0x01 (failure of self-test state significance bit) first in CAN bus and sends 1000ms's lasting Network management message informs other non-master controllers in A group, and after 1000ms, master node control is automatically disengaged Bus, remaining controller will be reduced into OSEK network management mechanism in A group at this time, realize the state of synchronous suspend mode.If with The fault recovery of A group master node control afterwards, three frame ZJ=0x00 can be continuously sent out in bus, and (self-test situation significance bit is just Often), after the non-master controller in the group detects the state, the net controlled by this group of master node control can be become again Network management strategy.

Control embodiment one:

When certain network segment is with PEPS (keyless entry starting), BCM (car body controller), MP5 (middle conduct boat), HVAC When (air-conditioner controller) and AVM (360 full-view camera) this five ECU modules, when electricity sets up defences and stands one section under vehicle at this time Between after, the vehicle carry five ECU modules as above carry out net dormancy simultaneously carry out low power operation mode.

According to mutual network communication logical relation, above-mentioned five controllers are divided into two groups by us, A group have BCM and PEPS, wherein BCM is A group host node;B group has tri- controllers of MP5, HVAC and AVM, and wherein MP5 is B group host node.

Vehicle is carried out after car owner leaves (to be commonly called as " car locking ") after lower electricity is set up defences, the controller of A group and B group enters at this time To suspend mode, but then its file packet is fallen onboard car owner suddenly, and it is anti-to need to carry out vehicle solution by car owner at this time, then being somebody's turn to do The anti-movement of solution can impact A group where BCM and PEPS, wake up its BCM and PEPS from dormant state, but should Movement is to the no any influence of B group, so the controller of B group is still within dormant state.Compared to original OESK network pipe Reason, using strategy of the invention, the controller being waken up only has 2, rather than 5 in OESK.

If car owner wants that opening air-conditioning (HVAC controller) freezes, and since HVAC belongs to B group, needs under normal circumstances at this time First to wake up B group master node control could wake up B group non-master controller, i.e. HVAC.But A group host node can pass through Across the group controller number position (CT) sent in network management message controls the HVAC (non-master controller) of B group Device, HVAC can carry out wake-up work in the case where MP5 does not wake up at this time, when car owner leaves vehicle again and lower electricity is set up defences, BCM suspend mode at this time, PEPS and HVAC controller also enter suspend mode therewith.

Control embodiment two:

In the present invention, local dormancy awakening open position (ST as shown in table 1) is designed, which is by default 0x01 (open state), i.e. CAN network open local sleep and arousal function, which can set key for driving in instrument It sails personnel artificially to be opened and closed, when driver artificially closes, ST=0x00, CAN network no longer have office at this time Portion's suspend mode and arousal function can enter traditional OESK network management.But when vehicle battery voltage is lower than normal voltage (under normal circumstances, on startup by engine power generation, battery voltage will not reduce vehicle, only quiet for a long time when 10% In the case of setting, battery just can power shortage), at this time can mandatory unlatching CAN network local sleep and arousal function, to guarantee electric power storage The cruising ability in pond.

In the present invention, it is directed to CAN bus, devises a kind of part of CAN bus Star Network management framework scheme Dormancy awakening strategy and method carry out rationalizing grouping and number using to the movement of car owner's difference, using grouping control and across group The principle of control does not need additionally to increase hardware configuration, while can be compatible with current OESK network management strategy, can basis Different vehicle conditions is decided in its sole discretion the function of whether opening local sleep wake-up by car owner, with extremely strong flexibility, while in order to Safety and stability considers, devises when vehicle accumulator electric-quantity is lower than a certain numerical value, then mandatory unlatching strategy, more With hommization.

It should be appreciated that invention which is intended to be protected is not limited to non-limiting embodiments, it should be understood that non-limiting embodiment party Case is illustrated as just example.The protection scope of the desired essence of the application is more embodied in independent claims offer Range and its dependent claims.

Claims (8)

1. a kind of local sleep awakening method of CAN bus Star Network management framework scheme comprising: it provides: CAN network pipe Message and multiple controllers corresponding with multiple operations are managed, the CAN network management message is based on OESK network management message Format simultaneously includes destination address DA and network management state position CF, it is characterised in that:
When vehicle executes the operation, message is managed by the CAN network and only wakes up the related controller with the operation, And the controller unrelated with the operation does not wake up then, still in dormant state, to reduce the amount controller being waken up.
2. a kind of local sleep awakening method of CAN bus Star Network management framework scheme as described in claim 1, special Sign is: state of the local sleep awakening method on the vehicle: being defaulted as open state, or when the remaining electricity of battery It is open state when measuring low, or thinks to control open and-shut mode.
3. a kind of local sleep awakening method of CAN bus Star Network management framework scheme as claimed in claim 2, special Sign is:
Be added into the CAN network management message: local sleep wakes up open position ST, grouping place number position NO and calls out across group Wake up number position CT;
Multiple controllers are at least divided into first group and second group of two group, include: in each group a master controller and By multiple sub-controllers, the master controller carries out mutual CAN bus communication between multiple sub-controllers respectively;
State of the local sleep awakening method on the vehicle is recorded in the local sleep and wakes up open position ST, institute State number position NO where sub-controller is recorded in the grouping.
4. a kind of local sleep awakening method of CAN bus Star Network management framework scheme as claimed in claim 3, special Sign is:
When wake actions occurs in the controller in first group, the master controller in described first group is waken up first, described Sub-controller in one group detects can wake up after the master controller in described first group wakes up, all in described second group Controller is in suspend mode;And
After the master controller in described first group confirms suspend mode, then all sub-controllers in described first group also enter therewith Suspend mode.
5. a kind of local sleep awakening method of CAN bus Star Network management framework scheme as claimed in claim 4, special Sign is:
When functionally needing such as the master controller in described first group using a sub-controller in described second group, then by institute The master controller in first group is stated by sending containing described across group CAN bus network management report of wake-up number position CT Text individually to wake up and control the sub-controller in described second group, and other sub-controllers in described second group not by It wakes up;And
After the master controller in described first group enters suspend mode, sub-controller in described first group and across described in group waking up The sub-controller in second group also enters suspend mode.
6. a kind of local sleep awakening method of CAN bus Star Network management framework scheme as claimed in claim 5, special Sign is:
Also be added into the CAN network management message: controller self-test position ZJ, controller self-test position ZJ record the control Device self-test qualification or status of fail processed;
When the controller self-test is qualified, the controller can be carried out the normal CAN bus communication;
When the controller fail self-test, it is failure that the controller, which persistently sends controller self-test position ZJ described in 1000ms, Automatically into offline situation and it can neither receive after CAN network management message and can not send message, and the controller It can attempt to send a frame message toward in CAN bus every 1000ms and confirm whether its failure is restored.
7. a kind of local sleep awakening method of CAN bus Star Network management framework scheme as claimed in claim 6, special Sign is:
It is also added into the CAN network management message: controller failure position RB and dormancy awakening reason position REA;
When the controller fail self-test, the controller failure position RB records the controller and the failure of fail self-test occurs Type number;And
Dormancy awakening reason position REA records preset dormancy awakening reason.
8. a kind of local sleep awakening method of CAN bus Star Network management framework scheme as claimed in claim 7, special Sign is:
When the master controller fail self-test in described first group, then the master controller in described first group is first in CAN bus In persistently send 1000ms controller self-test position ZJ be failure the CAN network management message inform it is described first group In all sub-controllers, and after 1000ms, the master controller in described first group automatically disengages bus, described at this time All sub-controllers in first group will shield the network management of the main controller controls in described first group, and transfer to take OSEK network management mechanism carries out building ring control, to achieve the purpose that synchronous suspend mode;
If the fault recovery of the master controller in then described first group, can continuously send out control described in three frames in CAN bus Device self-test processed position ZJ is that the qualified CAN network manages message, and all sub-controllers in described first group detect the shape After state, it can become again by the network management of the main controller controls in described first group.
CN201811534615.7A 2018-12-14 2018-12-14 A kind of local sleep awakening method of CAN bus Star Network management framework scheme CN109327372A (en)

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