CN117698602A - Power management method of ECU, electronic control unit, system and vehicle - Google Patents
Power management method of ECU, electronic control unit, system and vehicle Download PDFInfo
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- CN117698602A CN117698602A CN202311641717.XA CN202311641717A CN117698602A CN 117698602 A CN117698602 A CN 117698602A CN 202311641717 A CN202311641717 A CN 202311641717A CN 117698602 A CN117698602 A CN 117698602A
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- 238000007726 management method Methods 0.000 title claims abstract description 29
- 238000012544 monitoring process Methods 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000013500 data storage Methods 0.000 claims description 6
- 230000005059 dormancy Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 230000007958 sleep Effects 0.000 abstract description 49
- 238000011217 control strategy Methods 0.000 abstract description 12
- 238000012423 maintenance Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 5
- 230000003068 static effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
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Abstract
The invention relates to a power management method, an electronic control unit, a system and a vehicle of an ECU, wherein the method comprises the following steps: and after the slave electronic control unit in the vehicle-mounted network is electrified, wake-up source detection is carried out, if the slave electronic control unit detects an effective wake-up source, the vehicle-mounted network enters a wake-up mode, and if the slave electronic control unit does not detect the effective wake-up source, the vehicle-mounted network enters a monitoring mode. The invention adopts the control strategy of combining the main ECU wake-up instruction and the slave ECU wake-up source judgment, the main ECU does not need to send sleep/wake-up instructions to all the slave ECUs on the vehicle-mounted network, the bus load rate is reduced, and the maintenance cost is low when the network node is changed. The slave ECUs enter the monitoring mode when the wake-up source is not detected, so that mutual interference among the slave ECUs is avoided, and the problem that a control command received by a slave node cannot be executed when the slave ECUs are immediately switched from the wake-up state to the sleep state is solved.
Description
Technical Field
The invention relates to the technical field of whole vehicle electric control systems, in particular to a power management method of an ECU, an electronic control unit, a system and a vehicle.
Background
In the on-board network of the vehicle, a plurality of electronic control units (Electronic Control Unit, ECU) are included, which can control the vehicle in accordance with input signals, such as input signals from various switches or sensors, to improve the driving experience, enhance safety.
Existing electronic control unit power management schemes generally include the following two schemes: according to the scheme I, all ECUs connected in the same network segment are managed in a cooperative sleep mode, namely, the ECUs can enter a sleep state when all the ECUs meet sleep conditions. According to the second scheme, the master ECU sends a sleep instruction to at least one slave ECU in the vehicle-mounted network according to the target signal, so that the slave ECU corresponding to the target signal enters a sleep state.
In the first scheme, when one slave ECU cannot enter sleep, all the ECUs on the network cannot enter sleep state, so that the static power consumption is increased, the storage battery is deficient, and the vehicle cannot be started. In the second scheme, the master ECU needs to consider the wake-up/sleep condition of each slave ECU, so that accurate sleep/wake-up judgment is performed on each slave ECU, and the more slave ECUs are, the more the master ECU control strategy is complex, so that the master ECU control strategy is not suitable for a network with more nodes and more complex communication. And, every newly increased/decreased slave ECU on the network, the control strategy of the master ECU needs to be changed, and the later maintenance cost is high. Further, the master ECU needs to send sleep/wake commands to all slave ECUs on the network, increasing the bus load rate.
Disclosure of Invention
In view of this, it is necessary to provide a power management method, an electronic control unit, a system and a vehicle for an ECU, so as to solve the problems that in the prior art, the master ECU needs to perform sleep/wake-up judgment on each slave ECU, increasing the bus load rate and the post maintenance cost.
In order to solve the above-mentioned problems, in a first aspect, an embodiment of the present invention provides a power management method of an ECU, the method being applied to an on-vehicle network, the method including:
the method comprises the steps that wake-up source detection is carried out after a slave electronic control unit in a vehicle-mounted network is electrified; the wake-up source comprises a wake-up instruction broadcast by the main electronic control unit and a hard wire control instruction in the vehicle-mounted network;
if the slave electronic control unit detects an effective wake-up source, entering a wake-up mode; if the slave electronic control unit does not detect the effective wake-up source, entering a monitoring mode; the slave electronic control unit can receive the message in the monitoring mode, cannot send the message, and is driven to be in an activated state.
Preferably, if the slave electronic control unit detects a valid wake-up source, the method enters a wake-up mode, specifically including:
and if the slave electronic control unit detects an effective wake-up instruction broadcast by the master electronic control unit or the slave electronic control unit detects a hard wire control instruction in the vehicle-mounted network, the slave electronic control unit enters a wake-up mode.
Preferably, if the slave electronic control unit does not detect the valid wake-up source, the slave electronic control unit enters a listening mode, specifically including:
and if the slave electronic control unit does not detect the effective wake-up instruction broadcast by the master electronic control unit and the slave electronic control unit does not detect the hard wire control instruction in the vehicle-mounted network, the slave electronic control unit enters a monitoring mode.
Preferably, after the slave electronic control unit enters the listening mode, the method further comprises:
if the vehicle-mounted bus is in an idle state and the slave electronic control unit does not have driving output, the slave electronic control unit enters a power-down storage state after a first preset period of time, and relevant data of the slave electronic control unit are stored.
Preferably, after entering the power-down storage state from the electronic control unit, the method further comprises:
after the data storage of the slave electronic control unit is completed, if the vehicle-mounted bus is in an idle state and the slave electronic control unit has no driving output, the slave electronic control unit enters a dormant state after a second preset period.
In a second aspect, an embodiment of the present invention further provides an electronic control unit, where the electronic control unit is a slave electronic control unit in an in-vehicle network, and the slave electronic control unit includes:
the detection module is used for carrying out wake-up source detection after power-on; the wake-up source comprises a wake-up instruction broadcast by the main electronic control unit and a hard wire control instruction in the vehicle-mounted network;
the wake-up module is used for entering a wake-up mode when an effective wake-up source is detected;
the monitoring module is used for entering a monitoring mode when the effective wake-up source is not detected; the slave electronic control unit can receive the message in the monitoring mode, cannot send the message, and is driven to be in an activated state.
Preferably, the slave electronic control unit further comprises:
and the power-down storage module is used for entering a power-down storage state after a first preset period of time if the vehicle-mounted bus is in an idle state and the slave electronic control unit does not have drive output, and storing related data of the slave electronic control unit.
Preferably, the slave electronic control unit further comprises:
and the dormancy module is used for entering a dormancy state after a second preset period if the vehicle-mounted bus is in an idle state and the slave electronic control unit does not have drive output after the data storage is completed in the power-down storage state.
In a third aspect, an embodiment of the present invention further provides an on-vehicle network system, including a master electronic control unit and at least one slave electronic control unit according to the embodiment of the second aspect, where the master electronic control unit is communicatively connected to the at least one slave electronic control unit.
In a fourth aspect, the present invention further provides a vehicle, including an in-vehicle network system according to an embodiment of the third aspect.
The beneficial effects of adopting the embodiment are as follows: according to the power management method, the electronic control unit, the system and the vehicle of the ECU, which are provided by the embodiment of the invention, wake-up source detection is performed after the slave electronic control unit in the vehicle-mounted network is electrified, if the slave electronic control unit detects an effective wake-up source, the wake-up mode is entered, and if the slave electronic control unit does not detect the effective wake-up source, the monitor mode is entered. The invention adopts the control strategy of combining the main ECU wake-up instruction and the slave ECU wake-up source judgment, the main ECU does not need to send sleep/wake-up instructions to all the slave ECUs on the vehicle-mounted network, the bus load rate is reduced, and the maintenance cost is low when the network node is changed. The slave ECUs enter the monitoring mode when the wake-up source is not detected, so that mutual interference among the slave ECUs is avoided, and the problem that a control command received by a slave node cannot be executed when the slave ECUs are immediately switched from the wake-up state to the sleep state is solved.
Drawings
FIG. 1 is a flow chart of a method for managing power of an ECU according to an embodiment of the present invention;
FIG. 2 is a state diagram of power management from the ECU provided by the invention;
FIG. 3 is a block diagram of a slave electronic control unit according to the present invention;
fig. 4 is a block diagram of a vehicle-mounted network system according to the present invention.
Detailed Description
Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and together with the description serve to explain the principles of the invention, and are not intended to limit the scope of the invention.
In the conventional power management scheme of the ECU, the master ECU transmits a sleep command to each slave ECU in the vehicle-mounted network according to the target signal, so that the slave ECU corresponding to the target signal enters a sleep state. The existing scheme has the following defects: first, the master ECU needs to consider the wake-up/sleep condition of each slave ECU, so that accurate sleep/wake-up judgment is performed on each slave ECU, and the more slave ECUs, the more complex the master ECU control strategy, so that the master ECU is not suitable for a network with more nodes and more complex communication. Second, every new slave ECU added/subtracted on the network needs to change the control strategy of the master ECU, and the later maintenance cost is high. Third, the master ECU needs to send sleep/wake commands to all slave ECUs on the network, increasing the bus load factor.
In view of this, the embodiment of the invention provides a power management method for an ECU, which adopts a control strategy combining a master ECU wake-up instruction and a slave ECU wake-up source judgment, and the master ECU does not need to send sleep/wake-up instructions to all slave ECUs on a vehicle-mounted network, so that the bus load rate is reduced, and the maintenance cost is low when a network node is changed. The following description and description will be made with reference to various embodiments.
Fig. 1 is a flowchart of a method of an embodiment of a power management method of an ECU according to the present invention. As shown in fig. 1, the method is applied to an on-board network, and the method includes:
step 110, wake-up source detection is performed after the slave electronic control unit in the vehicle-mounted network is electrified; the wake-up source comprises a wake-up instruction broadcast by the main electronic control unit and a hard wire control instruction in the vehicle-mounted network.
Specifically, the vehicle-mounted network includes a master ECU (Electronic Control Unit, an electronic control unit) and at least one slave ECU, where the master ECU is connected to the at least one slave ECU through a vehicle-mounted bus, and the vehicle-mounted bus is a CAN (Controller Area Network ) bus. All slave ECUs are powered on to initialize default entry monitoring mode and wake-up source detection is performed.
Step 120, if the slave electronic control unit detects a valid wake-up source, entering a wake-up mode; and if the slave electronic control unit does not detect the effective wake-up source, entering a monitoring mode.
Specifically, the wake-up source of the slave ECU includes a wake-up instruction broadcast by the master electronic control unit and a hard-wire control instruction in the vehicle network. And detecting the effectiveness of the wake-up source from the ECU, and entering a wake-up mode if the wake-up source is effective, wherein in the wake-up mode, the ECU can send a message and drive to be in an activated state. If the slave ECU detects that the wake-up source is invalid, the slave ECU keeps a monitoring mode, can receive a message in the monitoring mode, cannot send the message, and drives to be in an activated state. Compared with the prior art, the invention avoids that all ECUs on the same bus in the cooperative control scheme can enter the sleep state only when all ECUs are required to meet the sleep condition. And the master ECU does not need to send sleep/wake-up instructions to all slave ECUs on the vehicle-mounted network, so that the bus load rate is reduced, and the maintenance cost is low when the network node is changed.
It can be appreciated that in the prior art, the slave ECU in the wake mode may send a message to the vehicle bus, so that other slave ECUs are affected by the vehicle bus message and cannot enter the sleep state. According to the embodiment of the invention, the monitoring mode of the ECU is increased, and each slave ECU can not send a message to the vehicle-mounted bus and can only receive the message in the monitoring mode, so that mutual interference when each slave ECU goes to sleep is avoided. In the prior art, if the slave ECU in the wake-up state directly switches from the wake-up mode to the sleep mode after receiving the sleep instruction of the master ECU in the process of executing the vehicle network control instruction, the vehicle network control instruction is not executed or is not executed, so that the operation of a part of functions of the vehicle is affected. The embodiment of the invention increases the ECU monitoring mode, and the slave ECU can receive the message of the vehicle-mounted bus in the monitoring mode, can ensure that the slave controller continuously receives the message of the vehicle-mounted bus and executes corresponding actions, and avoids the problem that the control command received from the ECU can not be executed when the slave ECU is immediately switched from the awakening state to the dormant state.
According to the power management method of the ECU provided by the embodiment of the invention, the master ECU does not need to send sleep/wake-up instructions to all the slave ECUs on the vehicle-mounted network, so that the bus load rate is reduced, and the maintenance cost is low when the network node is changed. The slave ECUs enter the monitoring mode when the wake-up source is not detected, so that mutual interference among the slave ECUs is avoided, and the problem that a control command received by a slave node cannot be executed when the slave ECUs are immediately switched from the wake-up state to the sleep state is solved.
Based on the foregoing embodiment, as a preferred implementation manner, in step 120, if the slave electronic control unit detects a valid wake-up source, then a wake-up mode is entered; if the slave electronic control unit does not detect the effective wake-up source, entering a monitoring mode, wherein the method specifically comprises the following steps:
and if the slave electronic control unit detects an effective wake-up instruction broadcast by the master electronic control unit or the slave electronic control unit detects a hard wire control instruction in the vehicle-mounted network, the slave electronic control unit enters a wake-up mode.
Specifically, the power management method of the ECU adopts a control strategy combining a main ECU wake-up instruction and a slave ECU wake-up source judgment, after the main ECU is electrified and initialized, the main ECU sends the wake-up instruction to at least one slave ECU in a broadcast mode, the slave ECU detects the validity of the wake-up instruction, and if the wake-up instruction of the main ECU is valid, the slave ECU is switched from a monitoring mode to a wake-up mode. In the present embodiment, the wake-up instruction of the main ECU is valid when any one of the following conditions is satisfied: 1) The main ECU receives a function control instruction; 2) The main ECU receives a remote control instruction; 3) The ON signal is active.
Further, the wake-up instruction of the main ECU is invalidated when all three of the following conditions are satisfied: 1) The main ECU does not receive a function control instruction; 2) The main ECU does not receive a remote control instruction; 3) The ON-range signal is inactive. If the wake-up instruction of the master ECU is invalid, the slave ECU detects a hard wire control instruction in the vehicle-mounted network, and the slave ECU is switched to the wake-up mode from the monitoring mode.
If the wake-up command of the master ECU is invalid and the slave ECU does not detect a hard-wire control command in the vehicle network, the slave ECU maintains the listening mode.
According to the power management method of the ECU provided by the embodiment of the invention, the control strategy of combining the main ECU wake-up instruction with the slave ECU wake-up source judgment is adopted, the main ECU does not need to send sleep/wake-up instructions to all slave ECUs on the vehicle-mounted network, the bus load rate is reduced, and the maintenance cost is low when the network node is changed.
In the prior art, the ECU immediately enters a sleep mode after receiving a sleep instruction when the vehicle-mounted bus is idle, so that relevant data of the ECU are not stored. In view of this problem, as a preferred implementation manner, after the slave electronic control unit enters the listening mode in step 120, the method for power management of the ECU according to the embodiment of the present invention further includes:
if the vehicle-mounted bus is in an idle state and the slave electronic control unit does not have driving output, the slave electronic control unit enters a power-down storage state after a first preset period of time, and relevant data of the slave electronic control unit are stored. Preferably, the first preset period may be set to 90s.
The embodiment of the invention increases the power-down storage mode of the ECU, and ensures that the ECU stores the data to be stored before entering into dormancy.
On the basis of the above embodiment, as a preferred implementation manner, after entering the power-down storage state from the ECU, the embodiment of the invention provides the power management method of the ECU further including:
after the data storage of the slave electronic control unit is completed, if the vehicle-mounted bus is in an idle state and the slave electronic control unit has no driving output, the slave electronic control unit enters a dormant state after a second preset period. Preferably, the second preset period may be set to 5s.
In this embodiment, after the slave ECU completes storing the data to be stored, the slave ECU is controlled to enter the sleep state, and power consumption is reduced.
In the power management method of the ECU provided by the embodiment of the invention, the power management state of the ECU specifically comprises the following modes:
wake mode: the ECU can send a message that all drives are in an active state;
monitoring mode: the ECU can receive the message, can not send the message, and all drives are in an activated state;
power down storage mode: the ECU stores the information to be stored before power-down, can receive the message, can not send the message, and all drives are in a forbidden state;
sleep mode: the ECU only maintains the lowest power consumption of the CPU operation of the ECU, and can not receive/transmit messages, and all the drivers are in a forbidden state.
Fig. 2 is a state diagram of power management of the slave ECU according to the present invention, and as shown in fig. 2, the slave ECU switches between different power management modes according to different conditions. Specific conditions and corresponding slave ECU switching actions are as follows:
condition 1
In the wake mode, the slave ECU satisfies all of the following conditions:
1) The wake-up instruction broadcast by the main ECU is not valid.
2) No hard-wired control command is detected from the ECU.
Action 1
The slave ECU switches from the wake mode to the listening mode.
Condition 2
In the slave ECU monitoring mode, any one of the following conditions is satisfied:
1) The wake-up instruction broadcast by the main ECU is valid.
2) A hard-wired control command is detected from the ECU.
Action 2
The slave ECU switches from listening mode to wake mode.
Condition 3
In the slave ECU monitoring mode, all of the following conditions are satisfied, and the duration exceeds 90s:
1) The slave ECU-related drive is turned off.
2) The bus is in an idle state.
Action 3
The slave ECU switches from the listening mode to the power-down storage mode.
Condition 4
In the slave power-down storage mode, the slave ECU satisfies any one of the following conditions:
1) There is a drive output from the ECU.
2) The bus is in a non-idle state.
Action 4
The slave ECU switches from the power-down storage mode to the listening mode.
Condition 5
In the slave power-down storage mode, the slave ECU satisfies all of the following conditions:
1) A storage completion flag is received from the ECU.
2) The slave ECU-related drive is turned off.
3) The bus is in an idle state.
Action 5
The slave ECU switches from the power-down storage mode to the sleep mode.
Condition 6
In the sleep mode, the slave ECU satisfies any one of the following conditions:
1) The slave ECU has a drive output;
2) The bus is in a non-idle state;
action 6
The slave ECU switches from the sleep mode to the power-down storage mode.
Condition 7
In the sleep mode, the slave ECU satisfies any one of the following conditions:
1) The slave ECU receives the wake-up instruction sent by the master ECU to be effective;
2) Detecting a hard-wire control instruction from the ECU;
action 7
The slave ECU switches from sleep mode to wake mode.
After the vehicle-mounted bus has no message for 90 seconds, and a wake-up source related to the main ECU is invalid, the main ECU also enters a dormant state; and the main ECU wakes up after the wake-up source related to the main ECU is valid.
Fig. 3 is a block diagram of a slave electronic control unit according to the present invention, and referring to fig. 3, the slave electronic control unit 300 includes:
the detection module 301 is configured to perform wake-up source detection after power-up; the wake-up source comprises a wake-up instruction broadcast by the main electronic control unit and a hard wire control instruction in the vehicle-mounted network;
a wake-up module 302, configured to enter a wake-up mode when a valid wake-up source is detected;
a monitor module 303, configured to enter a monitor mode when a valid wake-up source is not detected; the slave electronic control unit can receive the message in the monitoring mode, cannot send the message, and is driven to be in an activated state.
Specifically, a control strategy of combining a main ECU wake-up instruction and a slave ECU wake-up source judgment is adopted by a slave electronic control unit in the vehicle-mounted network, after the main ECU is powered on and initialized, the main ECU sends a wake-up instruction to at least one slave ECU in a broadcast mode, the slave ECU detects the validity of the wake-up instruction, and if the wake-up instruction of the main ECU is valid, the slave ECU is switched from a monitoring mode to a wake-up mode. In the present embodiment, the wake-up instruction of the main ECU is valid when any one of the following conditions is satisfied: 1) The main ECU receives a function control instruction; 2) The main ECU receives a remote control instruction; 3) The ON signal is active.
Further, the wake-up instruction of the main ECU is invalidated when all three of the following conditions are satisfied: 1) The main ECU does not receive a function control instruction; 2) The main ECU does not receive a remote control instruction; 3) The ON-range signal is inactive. If the wake-up instruction of the master ECU is invalid, the slave ECU detects a hard wire control instruction in the vehicle-mounted network, and the slave ECU is switched to the wake-up mode from the monitoring mode.
If the wake-up command of the master ECU is invalid and the slave ECU detects a hard-wire control command in the on-board network, the slave ECU maintains the listening mode.
In the prior art, a slave ECU in an awake mode sends a message to a vehicle bus, so that other slave ECUs cannot enter a sleep state under the influence of the vehicle bus message. Aiming at the problem, the embodiment of the invention increases the monitoring mode of the ECU, and each slave ECU can not send messages to the vehicle-mounted bus and can only receive the messages in the monitoring mode, thereby avoiding mutual interference when each slave ECU goes to sleep. In the prior art, if the slave ECU in the wake state directly switches from the wake mode to the sleep mode after receiving the main ECU sleep instruction in the process of executing the vehicle network control instruction, the vehicle network control instruction is not executed or is not executed, so that the operation of a part of functions of the vehicle is affected. The embodiment of the invention increases the ECU monitoring mode, and the slave ECU can receive the message of the vehicle-mounted bus in the monitoring mode, can ensure that the slave controller continuously receives the message of the vehicle-mounted bus and executes corresponding actions, and avoids the problem that the control command received from the ECU can not be executed when the slave ECU is immediately switched from the awakening state to the dormant state.
In the embodiment of the invention, the slave ECUs enter the monitoring mode when the wake-up source is not detected, so that mutual interference among the slave ECUs is avoided, and the problem that the control command received by the slave node cannot be executed when the slave ECUs are immediately switched from the wake-up state to the sleep state is solved.
In one embodiment, as shown in fig. 3, the slave electronic control unit 300 further comprises:
and the power-down storage module 304 is configured to enter a power-down storage state after a first preset period of time if the vehicle-mounted bus is in an idle state and the slave electronic control unit has no driving output, and store data related to the slave electronic control unit.
The embodiment of the invention increases the power-down storage mode of the ECU, and ensures that the ECU stores the data to be stored before entering into dormancy.
In one embodiment, as shown in fig. 3, the slave electronic control unit 300 further comprises:
and the sleep module 305 is configured to enter a sleep state after a second preset period if the vehicle bus is in an idle state and the slave electronic control unit has no driving output after the data storage is completed in the power-down storage state.
Specifically, the slave electronic control unit provided in the embodiment of the present invention is configured to execute the power management method of the ECU provided in each embodiment, and on the basis that the power management method of the ECU is described in the foregoing embodiment, this embodiment is not described herein again.
Fig. 4 is a block diagram of a vehicle-mounted network system according to the present invention, and as shown in fig. 4, the vehicle-mounted network system includes a master electronic control unit and at least one slave electronic control unit, where the master electronic control unit is communicatively connected to the at least one slave electronic control unit.
In one embodiment, the invention further provides a vehicle, which comprises the vehicle-mounted network system provided by the embodiment.
In summary, in the power management method, the electronic control unit, the system and the vehicle of the ECU provided by the embodiments of the present invention, wake-up source detection is performed after the slave electronic control unit in the vehicle-mounted network powers up, if the slave electronic control unit detects an effective wake-up source, the slave electronic control unit enters a wake-up mode, and if the slave electronic control unit does not detect an effective wake-up source, the slave electronic control unit enters a monitor mode. The invention adopts the control strategy of combining the main ECU wake-up instruction and the slave ECU wake-up source judgment, the main ECU does not need to send sleep/wake-up instructions to all the slave ECUs on the vehicle-mounted network, the bus load rate is reduced, and the maintenance cost is low when the network node is changed. The slave ECUs enter the monitoring mode when the wake-up source is not detected, so that mutual interference among the slave ECUs is avoided, and the problem that a control command received by a slave node cannot be executed when the slave ECUs are immediately switched from the wake-up state to the sleep state is solved.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. A power management method of an ECU, the method being applied to an on-vehicle network, the method comprising:
the method comprises the steps that wake-up source detection is carried out after a slave electronic control unit in a vehicle-mounted network is electrified; the wake-up source comprises a wake-up instruction broadcast by the main electronic control unit and a hard wire control instruction in the vehicle-mounted network;
if the slave electronic control unit detects an effective wake-up source, entering a wake-up mode; if the slave electronic control unit does not detect the effective wake-up source, entering a monitoring mode; the slave electronic control unit can receive the message in the monitoring mode, cannot send the message, and is driven to be in an activated state.
2. The method for power management of an ECU according to claim 1, wherein if said slave electronic control unit detects a valid wake-up source, entering a wake-up mode specifically comprises:
and if the slave electronic control unit detects an effective wake-up instruction broadcast by the master electronic control unit or the slave electronic control unit detects a hard wire control instruction in the vehicle-mounted network, the slave electronic control unit enters a wake-up mode.
3. The method for power management of an ECU according to claim 1, wherein if said slave electronic control unit does not detect a valid wake-up source, entering a listening mode specifically comprises:
and if the slave electronic control unit does not detect the effective wake-up instruction broadcast by the master electronic control unit and the slave electronic control unit does not detect the hard wire control instruction in the vehicle-mounted network, the slave electronic control unit enters a monitoring mode.
4. The power management method of an ECU according to claim 1, characterized in that after the slave electronic control unit enters a listening mode, the method further comprises:
if the vehicle-mounted bus is in an idle state and the slave electronic control unit does not have driving output, the slave electronic control unit enters a power-down storage state after a first preset period of time, and relevant data of the slave electronic control unit are stored.
5. The power management method of an ECU according to claim 4, characterized in that after entering a power-down storage state from an electronic control unit, the method further comprises:
after the data storage of the slave electronic control unit is completed, if the vehicle-mounted bus is in an idle state and the slave electronic control unit has no driving output, the slave electronic control unit enters a dormant state after a second preset period.
6. An electronic control unit, characterized in that the electronic control unit is a slave electronic control unit in an in-vehicle network, the slave electronic control unit comprising:
the detection module is used for carrying out wake-up source detection after power-on; the wake-up source comprises a wake-up instruction broadcast by the main electronic control unit and a hard wire control instruction in the vehicle-mounted network;
the wake-up module is used for entering a wake-up mode when an effective wake-up source is detected;
the monitoring module is used for entering a monitoring mode when the effective wake-up source is not detected; the slave electronic control unit can receive the message in the monitoring mode, cannot send the message, and is driven to be in an activated state.
7. The electronic control unit of claim 6, wherein the slave electronic control unit further comprises:
and the power-down storage module is used for entering a power-down storage state after a first preset period of time if the vehicle-mounted bus is in an idle state and the slave electronic control unit does not have drive output, and storing related data of the slave electronic control unit.
8. The electronic control unit of claim 6, wherein the slave electronic control unit further comprises:
and the dormancy module is used for entering a dormancy state after a second preset period if the vehicle-mounted bus is in an idle state and the slave electronic control unit does not have drive output after the data storage is completed in the power-down storage state.
9. An in-vehicle network system comprising a master electronic control unit and at least one slave electronic control unit according to claims 6 to 8, said master electronic control unit being in communication with said at least one slave electronic control unit.
10. A vehicle comprising the in-vehicle network system according to claim 9.
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| CN202311641717.XA CN117698602A (en) | 2023-11-30 | 2023-11-30 | Power management method of ECU, electronic control unit, system and vehicle |
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| CN202311641717.XA CN117698602A (en) | 2023-11-30 | 2023-11-30 | Power management method of ECU, electronic control unit, system and vehicle |
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