CN118740540A - Wake-up signal detection method and control device - Google Patents

Abstract

The invention provides a wake-up signal detection method and a control device, wherein the detection method comprises the following steps: when the target Lin channel is in a dormant state, configuring a first effective jump edge for the target signal receiving pin, wherein the first effective jump edge indicates the start of counting; in the process that the target signal receiving pin receives the wake-up signal, when the wake-up signal generates a first effective jump edge, counting is started, a second effective jump edge is configured for the target signal receiving pin, and the second effective jump edge is different from the first effective jump edge and indicates the end of counting; when the second effective jump edge appears in the wake-up signal, the counting is ended, the counting time length is calculated at least based on the beginning and ending, and the effectiveness of the wake-up signal is judged according to the time length.

Description

Wake-up signal detection method and control device

Technical Field

The present invention generally relates to the fields of automatic control and computer technology, and in particular to a detection method and a control device for a wake-up signal.

Background Art

Lin (Local Interconnect Network) is a low-cost serial communication network. The Lin communication network includes a master module and at least one slave module (the slave module is also usually called a Lin channel). The master module and each Lin channel are coupled through a Lin bus.

The Lin bus includes at least two states: working state (Operation) and sleeping state (Sleep). When the Lin bus is in the sleeping state, the main module and/or the Lin channel will also be in the sleeping state. When the main module and/or the Lin channel detects a valid wake-up signal on the Lin bus, it can jump from the sleeping state to the working state.

Based on this, how to ensure the reliability of the judgment on the validity of the wake-up signal to avoid the main module and/or the Lin channel being woken up by mistake is a problem that needs to be solved at present.

Summary of the invention

In order to solve the above problems or other problems, the present invention provides the following technical solutions.

In a first aspect, the present invention provides a wake-up signal detection method, which is applied to a Lin driver module, wherein the Lin driver module includes a Lin bus and at least one Lin channel, wherein the Lin bus is coupled to each of the Lin channels, and each of the Lin channels has a corresponding signal receiving pin, wherein the at least one Lin channel includes a target Lin channel, and the target Lin channel has a target signal receiving pin, and the detection method at least includes:

When the target Lin channel is in a dormant state, configuring a first valid transition edge for the target signal receiving pin, wherein the first valid transition edge is used to indicate the start of counting;

In the process that the target signal receiving pin receives the wake-up signal from the Lin bus, when the first valid transition edge appears in the wake-up signal, the counting is started, and a second valid transition edge is configured for the target signal receiving pin, the second valid transition edge is different from the first valid transition edge and is used to indicate the end of the counting; and,

When the second valid transition edge appears in the wake-up signal, the counting is ended, and the duration of the counting is calculated based on at least the start and the end, and the validity of the wake-up signal is determined according to the duration.

According to the detection method of the embodiment of the present invention, the detection method further includes:

When the target Lin channel enters the dormant state, enabling a transition edge detection interrupt;

When the first valid transition edge appears in the wake-up signal, the transition edge detection interrupt corresponding to the target Lin channel is entered to start the counting; and

When the second valid transition edge appears in the wake-up signal, the transition edge detection interrupt corresponding to the target Lin channel is entered to end the counting and disable the transition edge detection interrupt.

According to the detection method of the embodiment of the present invention, the target Lin channel is mapped to the target control register, wherein:

The step of configuring the target signal receiving pin with a first valid transition edge at least comprises: configuring the value in the target control register to be a first preset value, so that the target signal receiving pin determines the first valid transition edge in the wake-up signal according to the first preset value;

The step of configuring the target signal receiving pin with a second valid transition edge at least includes: configuring the value in the target control register to a second preset value, so that the target signal receiving pin determines the second valid transition edge in the wake-up signal according to the second preset value.

According to the detection method of the embodiment of the present invention, the target Lin channel is mapped to the target status register, and the step of configuring the target Lin channel to enter the transition edge detection interruption includes at least:

The value in the target status register is configured to trigger entry into the transition edge detection interrupt under the indication of the value.

According to the detection method of the embodiment of the present invention, each of the Lin channels includes a Lin controller, and the signal receiving pin is arranged on the Lin controller, wherein the Lin controller is implemented by non-Lin protocol controller hardware.

According to the detection method of the embodiment of the present invention, the Lin controller is configured to perform the counting.

According to the detection method of the embodiment of the present invention, the Lin controller is further configured to perform the calculation.

According to the detection method of the embodiment of the present invention, the first valid transition edge is a falling edge, and the second valid transition edge is a rising edge.

According to the detection method of the embodiment of the present invention, the detection method further includes:

When the result of the determination indicates that the wake-up signal is valid, the preset macro is configured to a first state, so that the target Lin channel enters a working state from the sleep state.

According to the detection method of the embodiment of the present invention, the step of judging the validity of the wake-up signal according to the duration at least includes:

When the duration is greater than 150 microseconds, it is determined that the wake-up signal is valid.

In a second aspect, the present invention provides a control device, the control device comprising at least:

A Lin driver module as described in any one of the above items; and

A processor is coupled to the Lin driving module and is configured to execute any of the above-mentioned wake-up signal detection methods.

According to the control device of the embodiment of the present invention, each of the Lin channels includes a Lin controller, and the signal receiving pin is arranged on the Lin controller, wherein the Lin controller is implemented by non-Lin protocol controller hardware.

According to the control device of the embodiment of the present invention, the control device further includes a timer module, and the timer module is configured to perform the counting.

The beneficial effects of the present invention include at least: the present invention provides a detection method and a control device for a wake-up signal, wherein the detection method for the wake-up signal is applied to a Lin driver module, the Lin driver module includes a Lin bus and at least one Lin channel, the Lin bus is coupled to each Lin channel, each Lin channel has a corresponding signal receiving pin, wherein at least one Lin channel includes a target Lin channel, the target Lin channel has a target signal receiving pin, and the detection method includes at least: when the target Lin channel is in a dormant state, configuring a first valid transition edge for the target signal receiving pin, the first valid transition edge is used to indicate the start of counting; in the process of the target signal receiving pin receiving the wake-up signal from the Lin bus, when the wake-up signal has the first valid transition edge , start counting, and configure a second valid transition edge for the target signal receiving pin, the second valid transition edge is different from the first valid transition edge and is used to indicate the end of counting; thereafter, when the second valid transition edge appears in the wake-up signal, end counting, and calculate the duration of the count at least based on the start and end, and judge the validity of the wake-up signal according to the duration. The present invention configures different valid transition edges for the target signal receiving pin before and after the first valid transition edge appears in the wake-up signal to control the start and end of counting the duration of a certain potential in the wake-up signal, so that the calculated duration is more accurate. Therefore, the reliability of the judgment on the validity of the wake-up signal is guaranteed, and the wake-up signal is avoided from being misjudged in application scenarios with high clock frequencies, thereby causing the target Lin channel to be mistakenly awakened.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the description of each embodiment according to the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

FIG. 1 is a schematic flow chart of a method for detecting a wake-up signal according to an embodiment of the present invention.

FIG. 2 is a further schematic flow chart of a method for detecting a wake-up signal according to an embodiment of the present invention.

FIG. 3 is a timing diagram of a method for detecting a wake-up signal according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of the structure of a Lin driving module provided in an embodiment according to the present invention.

FIG. 5 is a schematic diagram of the structure of a control device provided in an embodiment according to the present invention.

6a and 6b are schematic diagrams of bit fields corresponding to a control register and a status register provided in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION

The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

Please refer to Figures 1 and 4, wherein Figure 1 shows a flow chart of a method for detecting a wake-up signal provided in accordance with an embodiment of the present invention, and the method for detecting a wake-up signal is applied to a Lin driver module 100, and Figure 4 shows a structural diagram of a Lin driver module 100 provided in accordance with an embodiment of the present invention, from which one can see the general steps of the above-mentioned detection method and the components of the Lin driver module 100 and their relative positional relationships.

Specifically, the Lin driver module includes a Lin bus and at least one Lin channel. In the example of Figure 4, the Lin driver module 100 includes a Lin bus 110 and three Lin channels (respectively marked as 120a, 120b and 120c), wherein the Lin bus 110 is coupled to each Lin channel (120a, 120b and 120c), and each Lin channel (120a, 120b and 120c) has a corresponding signal receiving pin (respectively marked as Rxa, Rxb and Rxc).

Further, when the Lin channels (120a, 120b and 120c) are in the sleep state (Sleep) described above, when a certain Lin channel needs to be awakened from the sleep state to the working state (Operation) to perform a corresponding operation at a certain moment, the Lin channel is the target Lin channel at that moment. That is to say, the at least one Lin channel (the "three Lin channels" in the example of FIG. 4) includes the target Lin channel, and accordingly, the target Lin channel has a target signal receiving pin.

Next, taking the Lin channel marked as "120a" in FIG. 4 as the target Lin channel and the signal receiving pin marked as "Rxa" in FIG. 4 as the target signal receiving pin as an example, the detection method of the wake-up signal is described in detail. Specifically, the above detection method includes at least the following steps:

First configuration step S101: when the target Lin channel 120a is in a dormant state, a first valid transition edge is configured for the target signal receiving pin Rxa, where the first valid transition edge is used to indicate the start of counting;

The second configuration step S102: in the process of the target signal receiving pin Rxa receiving the wake-up signal S1 from the Lin bus 110, when the wake-up signal S1 has a first valid transition edge, the counting starts, and the target signal receiving pin Rxa is configured with a second valid transition edge, the second valid transition edge is different from the first valid transition edge, and is used to indicate the end of the counting;

Determining step S103: when the second valid transition edge of the wake-up signal S1 appears, the counting is ended, and the duration of the counting is calculated at least based on the start and end, and the validity of the wake-up signal S1 is determined according to the duration.

Specifically, please continue to refer to Figure 4. As shown in Figure 4, each Lin channel (120a, 120b and 120c) includes a corresponding Lin controller (130a, 130b and 130c), and each signal receiving pin (Rxa, Rxb and Rxc) is set on the corresponding Lin controller. Further, in some embodiments, the "counting" and "calculation" in the above detection method are performed by the Lin controller.

Specifically, the effective wake-up signal S1 is a signal that lasts for a certain period of time at a certain potential. Exemplarily, the effective wake-up signal S1 on the Lin bus 110 may be a low-level signal that lasts for 250 microseconds (um) to 5 milliseconds (ms).

Furthermore, the determination of “determining the validity of the wake-up signal S1 according to the duration” in step S103 may be performed with a threshold of 150 microseconds as the duration, and at least includes the following steps:

When the duration is greater than 150 microseconds, the wake-up signal S1 is determined to be valid.

It should be noted that, in some implementations, "whether the target Lin channel in the sleep state receives a frame of data" is used as a sign of "whether the duration reaches 150 microseconds".

Specifically, one frame of data includes several bytes of data. When the target Lin channel 120a is in a dormant state and a working state, its target signal receiving pin Rxa can receive data.

Further, in this embodiment, when the target signal receiving pin Rxa receives a byte of data, a receiving buffer non-empty interrupt (also called "RXNE interrupt") is generated to determine whether the target Lin channel 120a is in a dormant state in the corresponding interrupt processing function, and when it is determined that the target Lin channel 120a is in a dormant state, an idle interrupt (also called "idle interrupt") is enabled. The idle interrupt is used to indicate the end of a frame of data transmission. When the target signal receiving pin Rxa receives a frame of data, an idle interrupt is generated. That is, in this embodiment, when an RXNE interrupt and an idle interrupt are generated in succession, it indicates that a frame of data has been transmitted, that is, it indicates that the duration has reached 150 microseconds, and thus, the target Lin channel 120a is awakened.

However, in this implementation, on the one hand, if the transmission frequency of a frame of data received on the target signal receiving pin Rxa corresponding to the target Lin channel 120a in the dormant state is too high (such as greater than 10k Hz), then the processor will mistakenly judge a frame of data that lasts less than a predetermined standard (such as 150 microseconds) as a valid wake-up signal S1, thereby causing the target Lin channel 120a to be mistakenly awakened. On the other hand, this implementation requires that the Lin driver module 100 can detect whether the transmission of a frame of data is completed and generate an idle interrupt after receiving a frame of data completely. Since some hardware (such as a Lin controller that is not a Lin protocol) does not support the above detection and the generation of the above idle interrupt, the applicability of this implementation is not high.

Now return to continue to refer to Figures 1 and 4. In an embodiment of the present invention, in response to the above-mentioned problems, the inventor of this case proposes that, for a Lin controller that is not a Lin protocol, the duration of a certain potential appearing in the wake-up signal S1 can be counted, and the corresponding duration can be calculated. Thus, the processor can directly use the "length of the duration" as the basis for judging "whether the duration reaches the threshold", thereby making the reliability of the judgment step higher.

Further, in the embodiment of the present invention, the Lin controller (130a, 130b and 130c) is implemented in hardware by a non-Lin protocol controller. Specifically, the Lin controller can be based on the hardware implementation of a Universal Synchronous Asynchronous Receiver Transmitter (UART), or based on the hardware implementation of a controller of a Serial Communication Interface (SCI) protocol.

Furthermore, the inventor of this case also proposed that since the transition edges of the signal at the two nodes of "starting to maintain a certain potential" and "ending to maintain a certain potential" are different, different valid transition edges can be configured for the target signal receiving pin Rxa before and after a certain transition edge appears in the wake-up signal S1. Different valid transition edges can trigger different counting operations (such as the start and end of counting). Therefore, in the process of the target signal receiving pin Rxa receiving the wake-up signal S1, the validity of different transition edges in the wake-up signal S1 at different nodes can be used to trigger the above-mentioned counting operation, so as to accurately locate the start node and the end node of the wake-up signal S1 maintaining a certain potential, thereby improving the accuracy of the time length corresponding to the count obtained by subsequent calculation, ensuring the reliability of the processor's judgment on the validity of the wake-up signal S1, and avoiding the target Lin channel 120a from being woken up by mistake.

Specifically, please refer to the first configuration step S101 and the second configuration step S102 in FIG1. In the embodiment of the present invention, when the target Lin channel 120a is in a dormant state, the target signal receiving pin Rxa is configured with a first valid transition edge, and when the first valid transition edge of the wake-up signal S1 appears, counting is started, and the target signal receiving pin Rxa is configured with a second valid transition edge. That is, when the first valid transition edge of the wake-up signal S1 appears, it indicates that the wake-up signal S1 begins to maintain a certain potential, and the first valid transition edge triggers the processor to start counting the duration of the above-mentioned potential. Afterwards, when the second valid transition edge of the wake-up signal S1 appears, it indicates that the wake-up signal S1 ends maintaining the above-mentioned potential, and accordingly, the second valid transition edge triggers the processor to end the above-mentioned counting.

Furthermore, the above-mentioned “configuring the first valid transition edge/the second valid transition edge for the target signal receiving pin Rxa” can be implemented by configuring a register (Register) through software running on a processor.

For example, referring to FIG. 5 , which is a schematic diagram of the structure of a control device 200 provided according to an embodiment of the present invention, the control device 200 includes a target control register RG1 ( FIG. 6 a shows a schematic diagram of a bit field corresponding to the target control register RG1). In an embodiment of the present invention, the target Lin channel 120a is mapped to the target control register RG1, wherein:

The step of “configuring a first valid transition edge for the target signal receiving pin Rxa” in the first configuration step S101 may at least include: configuring the value in the target control register RG1 to be a first preset value, so that the target signal receiving pin Rxa determines the first valid transition edge in the wake-up signal S1 according to the first preset value;

The step of "configuring a second valid transition edge for the target signal receiving pin Rxa" in the above-mentioned second configuration step S102 may at least include: configuring the value in the target control register RG1 to a second preset value, so that the target signal receiving pin Rxa determines the second valid transition edge in the wake-up signal S1 according to the second preset value.

It should be noted that the first preset value can be 0, the second preset value can be 1, the low level in the wake-up signal S1 can correspond to the "0" value, and the high level in the wake-up signal S1 can correspond to the "1" value. In this configuration, the above-mentioned first valid transition edge is a falling edge, and the above-mentioned second valid transition edge is a rising edge.

For example, when the value in the target control register RG1 is configured as a "0" value, when the wake-up signal S1 has a falling edge, it will have a low level corresponding to the "0" value, so that the processor determines that the target signal receiving pin Rxa has received the falling edge of the wake-up signal S1 as the first valid transition edge. Correspondingly, when the value in the target control register RG1 is configured as a "1" value, when the wake-up signal S1 has a rising edge, it will have a high level corresponding to the "1" value, so that the processor determines that the target signal receiving pin Rxa has received the rising edge of the wake-up signal S1 as the second valid transition edge.

It should be understood that in other variations according to the present invention, when the first preset value is 0, the second preset value is 1, and the high level in the wake-up signal S1 corresponds to the value "0", and the low level in the wake-up signal S1 corresponds to the value "1", the first valid transition edge is a rising edge, and the second valid transition edge is a falling edge. Other configurations are not described in detail herein.

Furthermore, the inventor of the present case also proposed that, considering that when a wake-up signal S1 appears on the Lin bus 110, the processor may be in the process of processing other operations and cannot detect and judge the wake-up signal S1, therefore, in order to improve the timeliness of the target Lin channel 120a's response to the wake-up signal S1, a corresponding interrupt can be set to increase the priority of the processor's detection and judgment processing of the wake-up signal S1.

For example, please refer to FIG. 2 for a further flow chart of a detection method of a wake-up signal S1 according to an embodiment of the present invention. As shown in FIG. 2 , before the first configuration step S101, the detection method further includes an interrupt enabling step S104, which is as follows:

When the target Lin channel 120a enters the sleep state, the transition edge detection interrupt is enabled.

Further, as shown in FIG2 , when the wake-up signal S1 has a first valid transition edge, the second configuration step S102 further includes a first interruption step S1022, for example, entering the transition edge detection interrupt corresponding to the target Lin channel 120a to start counting. Correspondingly, when the wake-up signal S1 has a second valid transition edge, the determination step S103 further includes a second interruption step S1032, for example, entering the transition edge detection interrupt corresponding to the target Lin channel 120a to end counting.

Further, as shown in FIG. 2 , after the determination step S103 , the detection method further includes an interruption disabling step S105 , which is specifically as follows:

Disable edge detection interrupt.

It should be noted that the above-mentioned “configuring the target Lin channel 120a to enter the transition edge detection interrupt” can also be implemented by configuring a register (Register) through software running on a processor.

For example, please continue to refer to FIG. 5 , as shown in FIG. 5 , the control device 200 further includes a target state register RG2 ( FIG. 6 b shows a schematic diagram of the bit field corresponding to the target state register RG2). In an embodiment of the present invention, the target Lin channel 120a is mapped to the target state register RG2, and the above-mentioned step of “configuring the target Lin channel 120a to enter the transition edge detection interrupt” may at least include:

The value in the target status register RG2 is configured to trigger an entry transition edge detection interrupt under the indication of the value.

Next, the coordination between the various steps of the above-mentioned detection method will be fully described in conjunction with the timing diagram of the detection method of the wake-up signal S1 provided according to the embodiment of the present invention shown in FIG. 3 .

At time t1 shown in FIG. 3 , the target Lin channel 120a enters the sleep state from the working state. At this time, the processor (eg, through software running on the processor) configures the value in the target state register RG2 to enable the transition edge detection interrupt. Further, when the target Lin channel 120a is in a sleep state, the processor (for example, through the software running on the processor) configures the first valid transition edge of the target signal receiving pin Rxa based on the target control register RG1 (for example, write 0 in the target control register RG1 and configure the first valid transition edge as a falling edge). At time t2, the processor is triggered by the falling edge of the wake-up signal S1 received by the target signal receiving pin Rxa to suspend the processing of other operations, and enters the transition edge detection interrupt to start counting, and configures the second valid transition edge of the target signal receiving pin Rxa based on the target control register RG1 (for example, write 1 in the target control register RG1 and configure the second valid transition edge as a rising edge). At time t3, the processor (for example, through the software running on the processor) is triggered by the rising edge of the wake-up signal S1 received by the target signal receiving pin Rxa to suspend the processing of other operations, and enter the transition edge detection interrupt to end the counting, and then configure the value in the target status register RG2 to disable the transition edge detection interrupt. Afterwards, the duration of the count is calculated according to the start and end of the count, and the validity of the wake-up signal S1 is determined according to the duration.

Specifically, in some embodiments, in combination with FIG. 3 and FIG. 2, after the processor completes the configuration of the target state registers RG2 and RG1 in steps S104 and S101, the hardware of the Lin controller (130a, 130b or 130c) monitors the effective transition edge of the wake-up signal S1. Specifically, when the hardware of the Lin controller (130a, 130b or 130c) monitors the falling edge of the wake-up signal S1 at time t2, an interrupt signal is generated to trigger the processor to enter the target L The jump edge detection interrupt corresponding to the target Lin channel (120a, 120b or 120c) is used to execute the steps S1021 and S1022; when the hardware of the Lin controller (130a, 130b or 130c) detects the rising edge in the wake-up signal S1 at time t3, an interrupt signal is generated to trigger the processor to enter the jump edge detection interrupt corresponding to the target Lin channel (120a, 120b or 120c) to execute the steps S1031 and S1032. Specifically, in some embodiments, the working state and the sleeping state of the Lin channel (120a, 120b and 120c) are realized based on the macro (Macro), therefore, a plurality of different states (state) can be defined for the related macros, and when the corresponding states are configured for the above-mentioned related macros, the Lin channel can be in the working state or the sleeping state.

For example, after determining step S103, the detection method may further include the following steps:

When the determination result indicates that the wake-up signal S1 is valid, the preset macro is configured to the first state, so that the target Lin channel 120a enters the working state from the sleep state.

Specifically, in some embodiments, when the Lin bus 110 is idle for more than a certain period of time, or when the main module (such as a processor) and/or the Lin channel (120a, 120b and 120c) receives an instruction indicating that it needs to jump to a sleep state (for example, "Go to Sleep/Go to Sleep Internal"), it will jump from a working state to a sleep state.

Specifically, the above operation may also be implemented based on the configuration of a preset macro. For example, the detection method may further include the following steps:

When the target Lin channel 120a is in the working state, the preset macro is configured to the second state, so that the target Lin channel 120a enters the dormant state from the working state.

Furthermore, in some embodiments, when the hardware in the Lin channels (120a, 120b, and 120c) supports the low power consumption mode, the target Lin channel 120a can be configured to the low power consumption mode after the target Lin channel 120a enters the sleep state from the working state to further reduce the static power consumption of the target Lin channel 120a.

Furthermore, after the main module and/or the Lin channel enters the sleep state, the main module and/or the Lin channel may send a wake-up signal S1 to the Lin bus 110 .

Please refer to FIG5 , which shows a schematic diagram of the structure of a control device 200 provided in an embodiment according to the present invention. From the figure, it can be seen the various components of the control device 200 and the relative position relationship of the various components.

As shown in Fig. 5, the control device 200 at least includes the Lin driver module 100 and the processor 210 as described above. Next, the components in the control device 200 will be described in detail in conjunction with Fig. 5.

It should be noted that, in the embodiment of the present invention, the control device 200 can be a system on a chip that integrates a central processing unit (CPU), a random access memory (RAM), a read-only memory (ROM), a timer module and several input/output (I/O) interfaces, such as a micro-controller unit (MCU).

Specifically, the processor 210 may be the above-mentioned central processing unit, the processor 210 is coupled to the Lin driver module 100, and is configured to execute the steps in the wake-up signal detection method as described above, such as the first configuration step S101, the second configuration step S102 and the determination step S103.

Further, in some embodiments, the above-mentioned operation of "counting the duration of a certain potential appearing in the wake-up signal S1" can be performed by the Lin controller (120a, 120b and 120c) in the Lin driver module 100, specifically, based on the counting module inside the Lin controller. In other embodiments, the above counting can also be performed by the timer module of the control device 200.

According to the foregoing content, an embodiment of the present invention provides a detection method and a control device for a wake-up signal, wherein the detection method for the wake-up signal is applied to a Lin driver module, the Lin driver module includes a Lin bus and at least one Lin channel, the Lin bus is coupled to each Lin channel, each Lin channel has a corresponding signal receiving pin, wherein at least one Lin channel includes a target Lin channel, and the target Lin channel has a target signal receiving pin. The detection method at least includes: when the target Lin channel is in a dormant state, a first valid transition edge is configured for the target signal receiving pin, and the first valid transition edge is used to indicate the start of counting; in the process of the target signal receiving pin receiving the wake-up signal from the Lin bus, when the wake-up signal has the first valid transition edge, the counting starts, and the target signal receiving pin is configured with a second valid transition edge, the second valid transition edge is different from the first valid transition edge, and is used to indicate the end of counting; thereafter, when the wake-up signal has the second valid transition edge, the counting ends, and the duration of the counting is calculated at least based on the start and end, and the validity of the wake-up signal is judged according to the duration. The present invention configures different valid transition edges for the target signal receiving pin before and after the first valid transition edge of the wake-up signal appears, so as to control the start and end of counting the duration of a certain potential in the wake-up signal, thereby making the calculated duration more accurate. Therefore, the reliability of judging the validity of the wake-up signal is ensured, and the wake-up signal is avoided from being misjudged in application scenarios with a high clock frequency, thereby causing the target Lin channel to be mistakenly awakened.

In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent replacement falls within the protection scope required by the present invention.

In summary, although the preferred embodiments of the present invention have been disclosed as above, the above preferred embodiments are not intended to limit the present invention. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims (13)

1. A method for detecting a wake-up signal, characterized in that it is applied to a Lin driver module, the Lin driver module includes a Lin bus and at least one Lin channel, the Lin bus is coupled to each of the Lin channels, each of the Lin channels has a corresponding signal receiving pin, wherein the at least one Lin channel includes a target Lin channel, the target Lin channel has a target signal receiving pin, and the detection method at least includes: When the target Lin channel is in a dormant state, configuring a first valid transition edge for the target signal receiving pin, wherein the first valid transition edge is used to indicate the start of counting; In the process that the target signal receiving pin receives the wake-up signal from the Lin bus, when the first valid transition edge appears in the wake-up signal, the counting is started, and a second valid transition edge is configured for the target signal receiving pin, the second valid transition edge is different from the first valid transition edge and is used to indicate the end of the counting; and, When the second valid transition edge appears in the wake-up signal, the counting is ended, and the duration of the counting is calculated based on at least the start and the end, and the validity of the wake-up signal is determined according to the duration. 2. The detection method according to claim 1, characterized in that the detection method further comprises: When the target Lin channel enters the dormant state, enabling a transition edge detection interrupt; When the first valid transition edge appears in the wake-up signal, the transition edge detection interrupt corresponding to the target Lin channel is entered to start the counting; and When the second valid transition edge appears in the wake-up signal, the transition edge detection interrupt corresponding to the target Lin channel is entered to end the counting and disable the transition edge detection interrupt. 3. The detection method according to claim 1, characterized in that the target Lin channel is mapped to a target control register, wherein: The step of configuring the target signal receiving pin with a first valid transition edge at least comprises: configuring the value in the target control register to be a first preset value, so that the target signal receiving pin determines the first valid transition edge in the wake-up signal according to the first preset value; The step of configuring the target signal receiving pin with a second valid transition edge at least includes: configuring the value in the target control register to a second preset value, so that the target signal receiving pin determines the second valid transition edge in the wake-up signal according to the second preset value. 4. The detection method according to claim 2, characterized in that the target Lin channel is mapped to a target status register, and the step of configuring the target Lin channel to enter the transition edge detection interruption at least comprises: The value in the target status register is configured to trigger entry into the transition edge detection interrupt under the indication of the value. 5. The detection method according to claim 1, characterized in that each of the Lin channels comprises a Lin controller, the signal receiving pin is arranged on the Lin controller, wherein the Lin controller is implemented by non-Lin protocol controller hardware. 6 . The detection method according to claim 5 , wherein the Lin controller is configured to perform the counting. 7 . The detection method according to claim 5 , wherein the Lin controller is further configured to perform the calculation. 8 . The detection method according to claim 1 , wherein the first valid transition edge is a falling edge, and the second valid transition edge is a rising edge. 9. The detection method according to claim 1, characterized in that the detection method further comprises: When the result of the determination indicates that the wake-up signal is valid, the preset macro is configured to a first state, so that the target Lin channel enters a working state from the sleep state. 10. The detection method according to claim 1, wherein the step of judging the validity of the wake-up signal according to the duration at least comprises: When the duration is greater than 150 microseconds, it is determined that the wake-up signal is valid. 11. A control device, characterized in that the control device at least comprises: The Lin driver module according to any one of claims 1 to 10; and A processor is coupled to the Lin driving module and configured to execute the wake-up signal detection method according to any one of claims 1 to 12. 12. The control device according to claim 11, characterized in that each of the Lin channels comprises a Lin controller, the signal receiving pin is arranged on the Lin controller, and the Lin controller is implemented by non-Lin protocol controller hardware. 13 . The control device according to claim 11 , further comprising a timer module, wherein the timer module is configured to perform the counting.