KR102119766B1 - Controller for vehicle and operating method thereof - Google Patents

Abstract

The vehicle controller according to the present invention determines a wake-up signal according to a first method and outputs a first signal, a first transceiver, determines a wake-up signal according to a second method different from the first method, and a second signal A second transceiver for outputting, a logic circuit for generating an activation signal by receiving and ANDing the first signal and the second signal, and receiving power from a battery in response to the activation signal to the first and second microcomputers It may include a power supply circuit for supplying driving power.

Description

CONTROLLER FOR VEHICLE AND OPERATING METHOD THEREOF

The present invention relates to a vehicle controller and a method for operating the same.

The vehicle network may include a plurality of communication nodes (for example, electronic devices), and the first communication node may generate a wake-up signal when a specific event is detected. It can be transmitted to a communication node. When a wake-up signal is received, the operation mode of the second communication node may transition from a sleep mode to a normal mode. Thereafter, the second communication node may perform operations according to the wake-up reason when the wake-up reason is known. In a typical wake-up recognition technology, the controller may be turned on undesirably by causing noise to the output line, shorting the output line to the battery, or generating a wake-up signal due to malfunction of the transceiver.

Registered Patent: 10-1526413, Registration Date: January 10, 2014, Title: Transceiver IC and its operation. Patent registration: 10-1697787, Registration date: November 26, 2010 Title: Electronic controller power stage structure of electronic steering device and control method therefor. Patent registration: 10-1659627, Registration date: August 23, 2010, Title: Audio system including a power control circuit for reducing standby power in sleep mode.

An object of the present invention is to provide a vehicle controller for detecting an abnormal wakeup signal and a method for operating the same.

A vehicle controller according to an embodiment of the present invention includes: a first transceiver for determining a wakeup signal and outputting a first signal according to a first method; A second transceiver for determining a wakeup signal according to a second method different from the first method and outputting a second signal; A logic circuit that generates the activation signal by receiving and ANDing the first signal and the second signal; And a power supply circuit that receives power from a battery and supplies driving power to first and second microcomputers in response to the activation signal.

In an embodiment, the first method is characterized by including a unique ID in a controller area network (CAN) communication frame to wake up the corresponding controller.

In an embodiment, the second method is characterized by including a predetermined signal pattern in a controller area network (CAN) communication frame to wake up a corresponding controller.

In an embodiment, each of the first and second transceivers receives a high-level can signal and a low-level can signal, determines a wake-up signal according to a corresponding method, and inhibits the corresponding signal by INH (inhibit) It is characterized by output through a pin.

In an embodiment, the logic circuit is characterized in that it receives the first signal from the INH pin of the first transceiver and the second signal from the INH pin of the second transceiver, and outputs the activation signal.

In an embodiment, when the first signal is at a high level and the second signal is at a high level, the power circuit is activated.

In an embodiment, when one of the first signal and the second signal is at a low level, the power circuit is not activated.

An operation method of a vehicle controller according to an embodiment of the present invention includes: receiving a wakeup signal according to a first method in a first transceiver; Receiving a wakeup signal according to a second method in a second transceiver; And when the signals received from the first and second transceivers are both wake-up signals, determining that the wake-up signals are normal.

In an embodiment, when the wake-up signal is normal, the method may further include activating a power supply circuit.

In an embodiment, when the power circuit is activated, the method may further include supplying driving power to a first microcomputer corresponding to the first transceiver and a second microcomputer corresponding to the second transceiver.

The vehicle controller and its operation method according to an embodiment of the present invention detect a wake-up signal in different ways, determine whether the wake-up signal is normal according to the result, and turn the controller on accordingly to malfunction. Can be prevented.

In addition, the vehicle controller and its operation method according to an embodiment of the present invention can improve a safety level in terms of functional safety by blocking a malfunction caused by a mal-faction of a CAN transceiver.

The accompanying drawings are provided to help understand the present embodiment, and provide embodiments with detailed description. However, the technical features of the present embodiment are not limited to specific drawings, and the features disclosed in each drawing may be combined with each other to form a new embodiment.
1 is a view showing an exemplary controller 100 for a vehicle according to an embodiment of the present invention.
2 is a diagram illustrating a typical controller wake-up signal processing procedure.
3 is a view showing an exemplary controller 100 for a vehicle according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating the wakeup signal discrimination according to the first and second signals of the first and second transceivers 110 and 120 in the vehicle controller 100 according to an embodiment of the present invention.
5 is a flowchart illustrating an operation method of the vehicle controller 100 according to an embodiment of the present invention.

Hereinafter, the contents of the present invention will be described clearly and in detail so that those skilled in the art of the present invention can easily implement the drawings using the drawings.

The present invention can be applied to various changes and may have various forms, and specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosure form, and it should be understood as including all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms.

The terms may be used for the purpose of distinguishing one component from other components. For example, the first component may be referred to as the second component without departing from the scope of the present invention, and similarly, the second component may also be referred to as the first component. When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.

Other expressions describing the relationship between the components, such as "between" and "immediately between" or "neighboring to" and "directly neighboring to" should be interpreted as well. Terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "include" or "have" are intended to indicate that a feature, number, step, action, component, part, or combination thereof is implemented, and one or more other features or numbers. It should be understood that it does not preclude the existence or addition possibilities of, steps, actions, components, parts or combinations thereof. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms, such as those defined in the commonly used dictionary, should be interpreted as meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. .

1 is a view for explaining the wake-up operation of a typical transceiver. Referring to FIG. 1, when a wake-up command for ID:202 is included in a controller area network (CAN) frame message, each transceiver receives a CAN frame message, and whether or not to proceed with the wake-up in response to the CAN frame message. Decide whether or not to do it. Each transceiver stores a unique ID. To wake up a specific controller, a CAN signal with a unique ID can be sent to the CAN bus. The CAN transceiver with matching ID is woken up by turning on the power of the controller.

2 is a diagram illustrating a typical controller wake-up signal processing procedure. Wake-up CAN communication frame messages can be transmitted from other controllers (①). The CAN transceiver can recognize the wake-up ID and transmit a wake-up signal (②), and a power supply IC (integrated circuit) can supply power to the microcomputer (MCU2) to'ON' the controller operation.

A typical wake-up system may unintentionally generate a wake-up signal. For example, noise may be introduced into the output line of the wake-up signal of the CAN transceiver, the output line of the wake-up signal of the CAN transceiver may be short circuit to battery (SCB) error, or the wake-up signal output due to a malfunction of the CAN transceiver. , An unwanted wake-up signal may be generated.

A vehicle controller according to an embodiment of the present invention may be implemented to block unwanted wake-up signals, thereby preventing controller malfunction.

3 is a view showing an exemplary controller 100 for a vehicle according to an embodiment of the present invention. Referring to FIG. 3, the vehicle controller 100 includes a first transceiver 110, a second transceiver 120, a logic circuit 130, a power supply circuit 140, a first microcomputer 150, and a second microcomputer ( 160). The vehicle controller 100 shown in FIG. 1 may be a motor controller.

The first transceiver 110 may be implemented to receive a low level CAN signal P_CAN_L and a high level CAN signal P_CAN_H, and determine whether the received signal is a wakeup signal according to the first method. Here, the first method is a partial networking wake up method, which is a method of waking up by including a unique ID in a CAN communication frame. When determining the wake-up signal, the first transceiver 110 may output the first signal through the INH pin. Partial networking is one of AUTOSAR's energy management technologies. Instead of switching on all electronic control units (ECUs), it is possible to selectively switch only clusters to receive CAN messages. It contains the ID of the controller to be switched on in the CAN communication frame message. The first transceiver 110 may generate a first output signal by determining whether an ID corresponding to the vehicle controller 100 exists by receiving and decoding a CAN communication frame message.

The second transceiver 120 may be implemented to receive the low-level CAN signal P_CAN_L and the high-level CAN signal P_CAN_H, and determine whether the received signal is a wake-up signal according to the second method. Here, the second method is a pattern wake up method, in which a predetermined pattern is included in a CAN communication frame to wake up a corresponding IC. When determining the wake-up signal, the second transceiver 120 may output the second signal through the INH (inhibit) pin. In an embodiment, the wake-up pattern may mean a digital value of a predetermined pattern corresponding to the wake-up signal. When a signal of a specific pattern is received, it may be determined as a wake-up signal.

Meanwhile, each of the first and second transceivers 110 and 120 may receive power from the battery 200 through the battery pin VABT.

The logic circuit 130 is connected to the INH pin of the first transceiver 110 and the INH pin of the second transceiver 120, and the first signal and the second transceiver 120 transmitted from the INH pin of the first transceiver 110 ) And the second signal transmitted from the INH pin to generate an activation signal EN. On the other hand, it should be understood that the logic circuit 130 is not necessarily limited to the AND operation.

The power circuit 140 may receive power from the battery 200 in response to the activation signal EN, and supply power to the first and second microcomputers 150 and 160.

The first and second microcomputers 150 and 160 may be turned on by receiving power from the power circuit 140.

The first microcomputer 150 may be implemented to transmit and receive data to and from the outside through the first transceiver 110.

The second microcomputer 160 may be implemented to transmit and receive data to and from the outside through the second transceiver 120.

The vehicle controller 100 according to an embodiment of the present invention detects a wakeup signal in different ways, determines whether the wakeup signal is normal according to the result, and prevents malfunction by turning on the controller accordingly Can be.

In addition, the vehicle controller 100 according to an exemplary embodiment of the present invention can improve a safety level in terms of functional safety by blocking a malfunction caused by a malfaction of a CAN transceiver.

FIG. 4 is a diagram illustrating the wakeup signal discrimination according to the first and second signals of the first and second transceivers 110 and 120 in the vehicle controller 100 according to an embodiment of the present invention. 4, when both the first and second signals are at a high level, the wake-up signal is determined to be normal, and the power supply IC 140 is activated. Otherwise, the power supply IC 140 is not activated. For example, when there is an error in the wake-up signal, the first signal is at a low level, and the second signal is at a high level. When it is a pattern signal, the first signal is at a low level, and the second signal is at a high level. If the INH pin is malfunctioned, the first signal is high level and the second signal is low level. When noise is generated in the INH pin, the first signal may be at a high level, and the second signal may be at a low level.

5 is a flowchart illustrating an operation method of the vehicle controller 100 according to an embodiment of the present invention. 1 to 5, the operation of the vehicle controller 100 may proceed as follows.

The first transceiver 110 of the vehicle controller 100 may receive a wake-up signal according to the first method (S110). The second transceiver 120 of the vehicle controller 100 may receive a wake-up signal according to the second method. Here, the second method is different from the first method. When it is determined whether the signal received from the first transceiver 110 is a wakeup signal, and when it is determined whether the signal received from the second transceiver 120 is a wakeup signal, the wakeup signal is determined to be normal, and the power supply IC 140 ) May be activated (S130 ).

The steps and/or operations according to the present invention may occur simultaneously in other embodiments, in different order, or in parallel, or in different embodiments for different epochs, etc., as can be understood by one skilled in the art. You can.

Depending on the embodiment, some or all of the steps and/or actions drive instructions, programs, interactive data structures, clients and/or servers stored in one or more non-transitory computer-readable media. At least some may be implemented or performed using one or more processors. The one or more non-transitory computer-readable media may illustratively be software, firmware, hardware, and/or any combination thereof. In addition, the functionality of the “module” discussed herein may be implemented in software, firmware, hardware, and/or any combination thereof.

One or more non-transitory computer-readable media and/or means for implementing/performing one or more operations/steps/modules of embodiments of the present invention include application-specific integrated circuits (ASICs), standard integrated circuits, Controllers that perform appropriate instructions, including microcontrollers, and/or embedded controllers, field-programmable gate arrays (FPGAs), complex programmable logic devices (CPLDs), and the like. Does not.

Meanwhile, the above-described contents of the present invention are only specific embodiments for carrying out the invention. The present invention will include technical ideas that are abstract and conceptual ideas that can be utilized as future technologies, as well as the concrete and practical means available.

100: vehicle controller
110: first transceiver
120: first transceiver
130: logic circuit
140: power circuit
150: first microcomputer
160: second microcomputer

Claims (10)

A first transceiver for determining a wakeup signal according to the first method and outputting the first signal;
A second transceiver for determining a wakeup signal according to a second method different from the first method and outputting a second signal;
A logic circuit that generates the activation signal by receiving and ANDing the first signal and the second signal; And
And a power supply circuit that receives power from a battery in response to the activation signal and supplies driving power to first and second microcomputers. According to claim 1,
The first method includes a unique ID in a controller area network (CAN) communication frame to wake up a corresponding controller. According to claim 1,
The second method includes a predetermined signal pattern in a controller area network (CAN) communication frame to wake up a corresponding controller. According to claim 1,
Each of the first and second transceivers,
Receive a high-level can signal and a low-level can signal,
Determine the wake-up signal according to the corresponding method,
Vehicle controller, characterized in that for outputting a corresponding signal through the INH (inhibit) pin. The method of claim 4,
The logic circuit receives the first signal from the INH pin of the first transceiver and the second signal from the INH pin of the second transceiver, and outputs the activation signal. According to claim 1,
When the first signal is at a high level and the second signal is at a high level, the power supply circuit is activated. According to claim 1,
When one of the first signal and the second signal is at a low level, the power supply circuit is not activated. In the operation method of the vehicle controller,
Receiving a wakeup signal according to the first method in the first transceiver;
Receiving a wakeup signal according to a second scheme different from the first scheme in a second transceiver different from the first transceiver; And
And when the signals received from the first and second transceivers are both wake-up signals, determining that the wake-up signals are normal. The method of claim 8,
And when the wakeup signal is normal, activating a power circuit. The method of claim 9,
And when the power circuit is activated, supplying driving power to a first microcomputer corresponding to the first transceiver and a second microcomputer corresponding to the second transceiver.

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