JP2006036121A - Vehicular control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular control device in which no expensive memory is used for a slave server, a communication system is inexpensive, and the display corresponding to the mode before the instantaneous interruption is given if a power supply is instantaneously interrupted. <P>SOLUTION: A slave server 2 having a function switch 4, a display unit 5, and a control unit 10, a master server 1 having a function status memory 8 and a main control unit 6, and a bus line 3 to connect the servers 1, 2 are arranged in a vehicle, and the master server 1 transmits the requested signal to the slave server 2 via the bus line 3 at a predetermined time interval. When the slave server 2 receives the requested signal, the signal to indicate the switches status is transmitted via the bus line 3. The main control unit 6 of the master server 1 transmits the display status signal matched with the data of the function status memory 8 to the slave server 2 via the bus line at a predetermined time interval. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle control device including a master server and a slave server, and in particular, switches to two different modes using a self-returning push switch, and which mode is set at the same time. The present invention relates to a vehicle control device having a display unit that indicates whether or not.

  2. Description of the Related Art Conventionally, in mobile vehicles such as automobiles, one in which one or more in-vehicle electrical devices are collectively controlled by a single control device is known (see, for example, Patent Document 1).

  Here, FIG. 3 is a block diagram showing an example of the configuration of the main part of such a conventional vehicle control device, and the essential points of the vehicle control device using the bidirectional communication system including the master server 21 and the slave server 22 are shown. Indicates the part. In this system, every time the function switch 24, which is a self-returning push switch provided near the driver's seat, is pressed, the so-called child safety mode that disables the operation of the power window switch in seats other than the driver's seat is set and released Are alternately performed, and the LED 25a provided in the vicinity of the function switch 24 is turned on and off in conjunction with the setting and release.

  As shown in FIG. 3, the vehicle control device includes a master server 21, a slave server 22, a bus line 23 that connects the master server 21 and the slave server 22, and the slave server 22. Are connected to a function switch 24 consisting of a push switch and a function switch state display section 25 that turns on the LED 25a when the child safety mode is set by the function switch 24 and turns off the LED 25a when the function switch 24 is released. Yes.

A power window switch and a power window driving unit for the passenger seat or the rear seat, not shown, are connected to the master server 21 directly or via the bus line 23, and the master server 21 performs overall control of each unit of the vehicle control device. A communication unit 27 that transmits and receives various signals through the bus line 23 between the main control unit 26 and the slave server 22, and a single operation of the function switch 24 from an ON operation signal of the function switch 24 transmitted from the slave server 22. And a function status memory 28 composed of an E ² PROM (E-squared PROM) or the like in which stored data is updated so as to alternate between two values corresponding to the count of the counter 29. The control unit 26 is connected to the communication unit 27, the function status memory 28, and the counter 29. Are being connected, the communication unit 27 is connected to the bus line 23. The data stored in the function status memory 28 indicates the setting and release of the child safety mode (hereinafter referred to as function status). When the child safety mode is set, the value is reset to 1. If it is, the value is 0.

  The slave server 22 is provided in the control unit 30 that controls peripheral devices and the like, the communication unit 31 that transmits and receives various signals to and from the master server 21 through the bus line 23, and the function switch 24. A switch status memory 30a1 for storing data indicating an on / off state (hereinafter referred to as switch status) and a display status memory 30a2 for storing data for determining whether the LED 25a is turned on or off (hereinafter referred to as display status). The control unit 30 is connected to the function switch 24, the function switch state display unit 25, and the communication unit 31, and the communication unit 31 is connected to the bus line 23.

  In the communication system, the control unit 30 and the main control unit 26 perform information communication control via the bus line 23, and a plurality of regions, that is, frames are provided in one transmission signal. Are respectively written based on a predetermined format, a signal indicating the transmission source, a signal indicating the transmission destination, a switch status signal indicating whether the function switch 24 is on or off, and other signals indicating predetermined information. Are transmitted bidirectionally via the bus line 23.

  The function switch 24 is provided to prevent a child or the like who is on a moving vehicle such as an automobile from operating the power window opening / closing switch, thereby opening and closing the window unnecessarily. It is also called a switch and is provided in the vicinity of the driver's seat. Even when the power window opening / closing switch other than the driver's seat is operated, the main control unit 26 is caused to function so as to ignore the opening or closing command associated with the operation. When a push switch is released, a push switch such as a self-return tact switch that returns the position of the operation knob to a non-pressed state is used. Whenever the push switch is pressed and turned on, the window opens and closes. The child safety mode where the switch operation is ignored and the window open / close switch operation Window is child safety mode release mode to be driven alternately generated.

  That is, in the initial state, if the child safety mode cancel mode is set, the child safety mode cancel mode is operated when the window opening / closing switch is operated an odd number of times, and the child safety mode cancel mode is operated evenly. In the child safety mode, the LED 25a is turned on to indicate that the child safety mode is set. In the child safety mode release mode, the LED 25a is turned off to indicate that the child safety mode is released. .

  The control unit 30 of the slave server 22 confirms the switch status of the function switch 24 at a predetermined time interval, for example, 10 msec. The data in the switch status memory 30a1 is 1 when the switch is on and 0 when it is off. Rewrite and save. When the data indicating the switch status in the switch status memory 30a1 is changed, the control unit 30 outputs a signal including the information to the communication unit 31 and transmits the signal to the master server 21. In the display status memory 30a2, data for determining the display status of the LED 25a is stored. When the data is 1, the display is turned off, and when the data indicating the display status is changed, the control unit 30 is turned on. When the function switch state display unit 25 outputs a signal to the function switch state display unit 25 and the function switch state display unit 25 receives a signal of 1, the LED 25a continues to be lit until the next time 0 is input, and 0 is received. In this case, the LED 25a is turned off until 1 is input next time. The communication unit 31 outputs a signal to the bus line 23 when receiving a signal from the control unit 30, and outputs a signal to the control unit 30 when receiving a signal from the bus line 23.

  The communication unit 27 of the master server 21 is the same as the communication unit 31. When a signal from the main control unit 26 is input, a signal is output to the bus line 23, and when a signal is received from the bus line 23, A signal is output to the control unit 26. The main control unit 26 stores the data indicating the switch status of the function switch 24 received from the communication unit 27 in the switch status memory 26a. When the data changes from 1 to 0, the counter 29 counts once, and the counter 29 counts. Then, the value of the function status memory 28 is rewritten so that it becomes 1 when 0 and becomes 0 when 1. When the data in the function status memory 28 is changed, 1 data indicating lighting or 0 data indicating light extinction is written in the frame indicating the display status, and this signal is transmitted via the communication unit 27 to the bus. At the same time, the main control unit 26 sets the child safety mode when the value of the function status memory 28 becomes 1, and sets the child safety mode cancel mode when the value becomes 0.

  The vehicle control device having the above-described configuration operates as follows. However, the description of the operation performed here is the child safety mode release mode as an initial state, and the function status memory 28 of the master server 21, the switch status memory 30a1 of the internal memory 30a of the slave server 22, and the display status memory 30a2. Assume that all data is 0. From this state, the operation when the function switch 24 is pressed to change from the off state to the on state, automatically recovers by releasing the press, and from the on state to the off state will be described. In a normal operation, the on time is about 70 msec or longer, which is sufficiently longer than a predetermined time interval in which the control unit 30 confirms the state of the function switch 24.

  The switch status memory 30a1 is changed from 0 to 1 with the operation of the function switch 24 being turned from OFF to ON, and when the data is changed, the control unit 30 sets the frame indicating the switch status as 1 And a signal having a predetermined format including the address of the slave server 22 as a transmission source and the address of the master server 21 as a transmission destination is transmitted to the bus line 23 via the communication unit 31. When the communication unit 27 receives the signal through the bus line 23, the communication unit 27 outputs the signal to the main control unit 26. The main control unit 26 confirms whether the signal is addressed to the own master server 21. The signal shown in FIG. Next, after about 70 msec, the function switch 24 changes from on to off, and the data stored in the internal memory 30a1 changes from 1 to 0. When the data changes, a signal including the information is transmitted in the same format, and the data stored in the switch status memory 26a changes from 1 to 0. Then, when the data in the switch status memory 26a changes from 1 to 0, the counter 29 determines that the operation of the function switch 24 has been performed once, counts once, and sets the value in the function status memory 28 from 0. Change to 1. At this time, the main control unit 26 is set to the child safety mode and performs control according to the mode.

  At the same time, a predetermined format including a signal in which the frame indicating the display status is set to 1 in accordance with the change of the value of the function status memory 28, the address of the master server 21 that is the transmission source, and the address of the slave server 22 that is the transmission destination Is transmitted to the bus line 23. When the communication unit 31 receives the signal through the bus line 23, the control unit 30 determines whether the signal is addressed to itself and sets the display status memory 30a2 to 1. When the value of the internal memory 30a2 changes, the control unit 30 outputs a signal indicating lighting to the function switch state display unit 25 to turn on the LED 25a.

  Next, when the function switch 24 is pressed again from this state, the signals 1 and 0 indicating the switch status are transmitted from the communication unit 31 to the master server 21 at the time of 0 msec and the time of 70 msec, as before. The counter 29 determines that the function switch 24 has been operated once, and counts it as one. This time, the value of the function status memory 28 is changed from 1 to 0. At this time, the main control unit 26 enters the child safety mode release mode and performs control according to the mode. At the same time as the value of the function status memory 28 changes, a signal indicating that the frame indicating the display status is 0 is transmitted to the slave server 22 to set the display status memory 30a2 to 0, and a signal indicating that the function switch status display unit 25 is turned off is sent. The function switch state display unit 25 keeps the light off until the next signal 1 is input.

  In this way, the data stored in the function status memory 28 is alternately changed from 0 to 1 in response to a single operation of the function switch 24, that is, an operation that turns from off to on and turns off. In other words, if the initial state is the child safety mode release mode, the stored data in the function status memory 28 becomes 0 when the number of ON operations of the function switch 24 is an even number, and in this case, the child safety mode release mode is set. At the same time, the LED 25a is turned off. When the number of ON operations of the function switch 24 is an odd number, the data stored in the function status memory 28 is 1, and in this case, the LED 25a is turned on as the child safety mode.

  The slave server 22 transmits a request signal instructing the master server 21 to return a signal each time the power to drive the slave server 22 is turned on again and the reset state of the control unit 30 is released. A process of matching the data in the status memory 30a2 with the data in the function status memory 28 is performed. This is because the following inconvenience occurs if the processing is not performed. Specifically, in the state where the child safety mode is set, the connector that forms the power supply path of the slave server 22 is temporarily disconnected due to excessive vibration or the like, and the power supply of the slave server 22 is momentarily interrupted. Then, since the display status memory 30a2 is a general RAM, the value is reset from 1 to 0, and the LED 25a is turned off in spite of being in the child safety mode. This continues until the function switch 24 is operated. This is because, as described above, unless the contents of the switch status memory 30a1 are changed from 0 to 1, 1 to 0, that is, unless the function switch 24 is operated, no signal is transmitted to the master server 21, and therefore the function status. This is because the value of the memory 28 is not changed, and unless the value of the function status memory 28 is changed, no signal is transmitted to the slave server 22 and the value of the display status memory 30a2 does not change.

In this case, instead of configuring the display status memory 30a2 in state RAM, it is conceivable that the power is composed of instantaneous interruption is also stored the data contents and rewritable E ² PROM, E ² PROM is Since it is expensive, there is a problem that the cost increases.
Japanese Utility Model Publication No. 02-046491

  By the way, in the conventional vehicle control device described above, it is possible to easily confirm when the power supply is momentarily cut off. Since each vehicle has different arrangements (protocols), it takes a lot of time for development, etc., and it is difficult to standardize ICs, etc., and the maintenance service becomes complicated, making it impossible to reduce costs. .

  Here, it is conceivable to use Rimbus {LIN (Local Interconnect Network) -BUS} which is a unified standard. In the Limbus, a request signal for requesting a reply of a signal to the master server 21 is transmitted to the slave server 22 at predetermined time intervals, and the slave server 22 transmits a signal only when the request signal is received. In the two-way communication, the slave server 22 is different from the one that transmits a signal to the master server 21 in a predetermined state. However, the basic block diagram is not changed, and other basic operations are the same as in the case of the above-described bidirectional communication. Therefore, the case of using the Rimbus will be described below with reference to FIG.

  The main control unit 26 of the master server 21 of the Limbus includes the address of the transmission source and the transmission destination every time when the transmission timing comes every predetermined time interval, for example, every 50 msec shorter than the switch on time of 70 msec. A request signal is formed, and the request signal is transmitted from the communication unit 27 to the slave server 22 via the link 23. When the slave server 22 receives the signal, the slave server 22 returns a signal indicating the switch status data at that time. Specifically, on the basis of an arbitrary time, a request signal is transmitted at that time, and when the function switch 24 generates an ON signal in 10 to 80 msec, when the time is 0 msec, the switch The status memory 26a is set to 0, and becomes 1 at the next timing after 50 msec has elapsed, and becomes 0 at the next timing after 50 msec has elapsed. Then, by the same operation as the above-described bidirectional communication, the switch status memory 26a has values of 0, 1, 0. When the value changes from 1 to 0, the counter 29 counts once and changes the value of the function status memory 28. When the value changes, the display status frame is converted into data that matches the function status, and is transmitted to the slave server 22 to change the data in the display status memory 30a2, and when the control unit 30 detects the change in the data. A signal is output to the function switch state display unit 25, and the LED 25a is turned on or off by the function switch state display unit 25.

  However, also in the Rimbus, the value of the function status memory 28 does not change unless the function switch 24 is operated and the value of the switch status memory 26a is changed as in the above-described bidirectional communication. Unless the signal changes, a signal for changing the display status memory 30a2 is not transmitted, and when the power supply of the slave server 22 is momentarily cut off, there is a problem that the set mode and the display do not have a predetermined relationship. In the case of the above-described bidirectional communication, a request signal can be transmitted from the slave server 22 to check the memory of the master server 21 when the power is turned on. This is not possible because the server 22 does not send its own signal.

  The present invention has been made in view of such a technical background, and an object of the present invention is to be able to use a communication system that can be made inexpensive, and without requiring an expensive memory for a slave server, and at the same time, An object of the present invention is to provide a vehicle control device capable of displaying in accordance with the mode before the instantaneous interruption even when the power supply is instantaneously interrupted.

  In order to achieve the above object, a vehicle control apparatus according to the present invention has at least two different display states from a self-return function switch that outputs a predetermined signal every time an operation is performed and automatically returns to a non-operation position. The display unit, the self-recovering function switch, and the display unit are connected to transmit a switch status signal indicating the operation state of whether the self-recovering function switch is on or off, and receive a display status signal that determines the display state of the display unit. And a slave server having a control unit for displaying the display of the display unit in a predetermined state, and receiving the switch status signal and rewriting the stored data in the function status memory in accordance with the received signal, in accordance with the stored data A master server having a main control unit for controlling control of a controlled unit provided in the vehicle in a predetermined mode; A bus line connected between the bus and the slave server is arranged in the vehicle, the master server transmits a request signal through the bus line at predetermined time intervals, and the slave server responds to the request signal by receiving the bus line. The main control unit forms a display status signal according to the data stored in the function status memory at a predetermined time interval, and transmits the display status signal from the master server to the slave server via the bus line. Means.

  In the above means, the master server includes other means for transmitting the display status signal to the slave server side via the bus line when the request signal is transmitted.

  Further, in the above means or the other means, the main control unit is provided with a counter that counts one operation of the self-return type function switch by a switch status signal, and the data stored in the function status memory every time the count is counted. Are switched alternately, the mode is switched to a predetermined mode and a release mode of the predetermined mode in accordance with the stored data, and at the same time, another means is provided in which the display unit is switched to two display states that are turned on and off.

  As described above, according to the vehicle control device of the first aspect, the master server transmits the display status signal corresponding to the contents of the function status memory at predetermined time intervals through the bus line. Since the display on the display unit is displayed in a predetermined state according to the received display status signal, even if the slave server is powered off, if the predetermined time elapses, the master server side The mode of the main control unit based on the function status can be linked to the display of the slave server, and when the predetermined time interval is shortened, the mismatch of the links hardly poses a problem.

  According to the vehicle control device described in claim 2, since the master server transmits the display status signal when transmitting the request signal, the signal transmission from the master server to the slave server is requested. In addition to achieving the above effect, the signal transmission efficiency can be increased.

  Further, according to the vehicle control device of the third aspect, the main control unit is provided with a counter that counts one operation of the self-return type function switch by the switch status signal, and is stored every time the count is performed. The data is switched alternately, the mode is set to the predetermined mode and the mode is switched to the release mode of the predetermined mode according to the stored data, and at the same time, the display unit is set to two display states differently lit and extinguished. It can be easily applied to a control device that performs control so as to repeatedly turn on and off in accordance with the setting and release of the control.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 relates to one embodiment of a vehicle control apparatus according to the present invention, and is a block diagram showing a configuration of a main part thereof. The apparent difference between the configuration of FIG. 1 and the configuration of the conventional example of FIG. 3 is that a display status memory 6a2 is provided in the internal memory 6a of the main control unit 6 in addition to the switch status memory 6a1.

  Specifically, the vehicle control apparatus according to the present invention includes a master server 1, a slave server 2, and a bus line 3 that connects the master server 1 and the slave server 2. Is a function switch (self-return type function switch) 4 composed of a push switch, and when the child safety mode (predetermined mode) is set by the function switch 4, the LED 5a is turned on and released (the release mode of the predetermined mode). ) Is connected to a function switch state display unit (display unit) 5 that turns off the LED 5a.

The master server 1 is connected with a power window switch and a power window driving unit (not shown) for the passenger seat or the rear seat, either directly or via the bus line 3, and the master server 1 supervises each part of the vehicle control device. The main control unit 6 to be controlled, the communication unit 7 that transmits and receives various signals through the bus line 3 between the slave server 2, and the function switch 4 once from the ON operation signal of the function switch 4 that is transmitted from the slave server 2. A function status memory comprising a counter 9 that counts the number of operations and an E ² PROM (E-squared PROM) in which stored data is updated so as to alternately take two values of 0 and 1 corresponding to the count of the counter 9 The main control unit 6 is connected to the communication unit 7, the function status memory 8, and the counter 9, respectively. It is connected to the bus line 3. The data stored in the function status memory 8 indicates the setting and canceling of the child safety mode (hereinafter referred to as function status). When the child safety mode is set, the value is 1 and is canceled. The case is 0.

  The slave server 2 is provided in the control unit 10 that controls peripheral devices and the like, the communication unit 11 that transmits and receives various signals to and from the master server 1 through the bus line 3, and the function switch 4. A switch status memory 10a1 for storing data indicating an on / off state (hereinafter referred to as switch status), a RAM having a display status memory 10a2 for storing data for determining whether the LED 5a is turned on or off (hereinafter referred to as display status), and the like The control unit 10 is connected to the function switch 4, the function switch state display unit 5, and the communication unit 11, and the communication unit 11 is connected to the bus line 13.

  In this case, the Rimbus performs communication control of information via the bus line 3 in the control unit 10 and the main control unit 6, and FIG. 2A shows a signal transmitted from the master server 1 to the slave server 2, and FIG. 2B shows a signal transmitted from the slave server 2 to the master server 1. Although specific signal waveforms of frames constituting each signal are not shown, they are digital signals indicating respective data contents.

  As shown in FIG. 2 a), the signal transmitted from the master server 1 to the slave server 2 is formatted according to the standard, mainly a frame called a header for notifying transmission of data and requesting a reply, The data frame is composed of a plurality of data frames, in which a signal indicating the transmission source, a signal indicating the transmission destination, a signal indicating the display status, and a signal indicating other predetermined information are written. Further, as shown in FIG. 2b), the signal transmitted from the slave server 2 to the master server 1 is returned after time t after the completion of reception, and is composed of data frames, indicating the transmission source. A signal, a signal indicating the transmission destination, a signal indicating the switch status information of the function switch 4, and a signal indicating other predetermined information are written. As shown in FIG. 2, one transmission / reception is performed between the slave server 2 and the master server 1 by transmission of a signal from the master server 1 and transmission of a signal from the slave server 2 after time t. Done.

  In the communication between the master server 1 and the slave server 2, which will be described later, a signal indicating the transmission source and a signal indicating the transmission destination are always written, but when there is no unnecessary signal or corresponding information, A signal indicating information in the corresponding frame is empty without being written, and in the following description, detailed description of specific signals is omitted.

  The function switch 4 is provided to prevent a child or the like riding in a moving vehicle such as an automobile from operating the power window opening / closing switch, thereby opening and closing the window unnecessarily. It is also called a tail switch and is provided in the vicinity of the driver's seat. Even if the power window opening / closing switch other than the driver's seat is operated, the main control unit 6 is made to function so as to ignore the opening or closing command accompanying the operation. When a push switch is released, a push switch such as a self-return tact switch that returns the position of the operation knob to a non-pressed state is used. Whenever the push switch is pressed and turned on, the window opens and closes. The child safety mode where the switch operation is ignored and the window open / close switch operation Child safe Tay mode release mode to be driven is generated alternately.

  That is, in the initial state, if the child safety mode cancel mode is set, the child safety mode cancel mode is set when the window opening / closing switch is operated an odd number of times, and the child safety mode cancel mode is set when the window open / close switch is operated an even number of times. In the child safety mode, the LED 5a is lit to indicate that the child safety mode is set. In the child safety mode cancel mode, the LED 5a is turned off and the child safety mode cancel mode is set. Indicates that there is.

  The control unit 10 of the slave server 2 confirms the switch status of the function switch 4 at a predetermined time interval, for example, 10 msec. The switch status memory is set to 1 when the switch is on and 0 when the switch is off. The data of 10a1 is rewritten and saved. The display status memory 10a2 stores data for determining the display status of the LED 5a. For example, the display status memory 10a2 is turned on when 0, and is turned off when 0, and the function switch state when the data indicating the display status is changed. When a signal is output from the control unit 10 to the display unit 5 and the function switch state display unit 5 receives a signal of 1, when the LED 5a continues to be lit until 0 is input next, when 0 is received Continues turning off the LED 5a until 1 is input next time. The communication unit 11 outputs a signal to the bus line 3 when receiving a signal from the control unit 10, and outputs a signal to the control unit 10 when receiving a signal from the bus line 3.

  The communication unit 7 of the master server 1 is the same as the communication unit 11. When a signal from the main control unit 6 is input, a signal is output to the bus line 3, and when a signal is received from the bus line 3, A signal is output to the control unit 6. The main control unit 6 stores the data indicating the switch status of the function switch 4 received from the communication unit 7 in the switch status memory 6a1. When the data changes from 1 to 0, the counter 9 counts once, and the counter 9 counts. Then, the value of the function status memory 8 is rewritten so that it becomes 1 when 0 and becomes 0 when 1. When the data in the function status memory 8 is changed, 1 data indicating lighting is written in the display status memory 6a2 indicating the display status of the LED 5a. At the same time, the main control unit 6 sets the child safety mode when the value of the function status memory 8 becomes 1, and sets the child safety mode cancel mode when it becomes 0. Further, the main control unit 6 writes data in a frame indicating a reply instruction and data in a frame indicating a display status each time a transmission timing arrives at a predetermined time interval, for example, every 50 msec. Predetermined data is written in a frame indicating an address and a destination address, and transmitted from the communication unit 7 to the slave server 2 through the bus line 3.

  The vehicle control device having the above-described configuration operates as follows. However, the operation description here is in the child safety mode release mode as an initial state, and the function status memory 8 on the master server 1 side, the switch status memory 6a1, the display status memory 6a2, and the slave server 2 side. Assume that the switch status memory 10a1 and the display status memory 10a2 in the internal memory 10a are all zero. In this state, the operation when the function switch 4 is pressed to change from the off state to the on state, automatically recovers by releasing the press, and from the on state to the off state will be described. It is assumed that the function switch 4 is turned on from 10 msec to 80 msec with a certain arbitrary time as a reference, and request signals are sequentially transmitted at time intervals of 0 msec to 50 msec.

  At the time of 0 msec, a signal indicating a reply instruction is a data indicating a reply instruction, and a signal whose display status frame is 0 is transmitted from the master server 1 to the slave server 2. The slave server 2 receives this, confirms whether it is a signal addressed to its own slave server 2, and if the confirmation is made, compares the display status data with the data in the display status memory 10a2, and confirms their match. . If it is confirmed that a reply is requested, the switch status memory 10a2 is 0, so a signal with a switch status of 0 is transmitted. The communication unit 7 receives this signal and outputs it to the main control unit 6. The main control unit 6 confirms whether the signal is addressed to the own master server 1, and if the confirmation is made, the frame 0 indicating the switch status is displayed. And 0 recorded in the switch status memory 6a1 are compared. In this case, the switch status memory 6a1 is not rewritten.

  Next, the same signal as that at 0 msec is transmitted after 50 msec has elapsed, and when this signal is received by the slave server 2, the coincidence of the data in the display status memory 10 a 2 is confirmed as before. If it is confirmed that a reply is requested, the function switch 4 is turned on at that time, so that the switch status memory 10a1 is 1, and a signal with a switch status of 1 is sent to the master server 1. Send. At this time, the master server 1 performs the above-described operation, compares the switch status data with the data stored in the switch status memory 10a1. In this case, the master server 1 sets the data in the switch status memory 6a1 to 0. Change from 1 to 1.

  Next, after the elapse of 100 msec, the same signal as that at 0 msec is transmitted, and since the function switch 4 is turned off, the switch status memory 10a1 is 0, and a signal with a switch status of 0 is transmitted to the master server 1. Send to. At this time, the master server 1 changes the data in the switch status memory 6a1 from 1 to 0 by the same operation as described above.

  The counter 9 determines that the operation of the function switch 4 has been performed once because the data in the switch status memory 6a1 has changed from 1 to 0, and counts once, and the value of the function status memory 8 is changed from 0 to 1. Change. At this time, the main control unit 6 is set to the child safety mode and performs control according to the mode. Further, the value of the display status memory 6a2 is changed to 1.

  Thereafter, after 150 msec has elapsed, since the display status memory 6a2 is 1, a signal with the display status set to 1 is transmitted. When the slave server 2 receives this signal, the data in the display status memory 10a2 is rewritten. When this rewriting is performed, the control unit 10 supplies a control signal to the function switch state display unit 5 so that the LED 5a is lit. To do. The function switch state display unit 5 keeps the LED 5a on until the next 0 signal is input.

  When the function switch 4 is pressed again from this state, similarly, the main control unit 6 receives signals with switch statuses of 0, 1, and 0 as time passes, and the counter 9 counts once. The data in the function status memory 8 is changed from 1 to 0, and the data in the display status memory 6a2 is also changed from 1 to 0. When the next transmission timing comes, a signal with the display status set to 0 is transmitted to the slave server 2, the data in the display status memory 10a2 is rewritten to 0, and the LED 5a is turned off.

  In this manner, in the function status memory 8, the stored data is alternately changed from 0 to 1 in response to one operation of the function switch 4, that is, an operation from turning off to turning on. That is, when the initial state is the child safety mode release mode, the data stored in the function status memory 8 becomes 0 when the number of ON operations of the function switch 4 is an even number, and in this case, the child safety mode is set. In the release mode, the LED 5a is turned off. When the number of ON operations of the function switch 4 is an odd number, the data stored in the function status memory 8 is 1, and in this case, the LED 5a is turned on as the child safety mode.

Note that, in the child safety mode, the connection of the connector arranged in the power supply path (not shown) of the slave server 2 is temporarily disconnected due to excessive vibration or the like, and the power supply of the slave server 2 is momentarily interrupted. Then, since the function status memory 8 is composed of E ² PROM, the value of 1 is maintained, whereas the value of the display status memory is a normal RAM, so that the value becomes 1 to 0. However, in the present invention, since the request signal transmitted from the master server 1 to the slave server 2 immediately after the power supply is restored, the signal with the display status set to 1 is transmitted as described above, the LED 5a is immediately turned on. .

  In the above-described embodiment, the function switch 4 is described as an example using a switch that is off in a non-pressed state and that is turned on when pressed. A switch that is turned on in the state and turned off when pressed may be used.

  In the above embodiment, the switch status memories 10a1 and 6a1 are set to 1 when the function switch 4 is turned on and 0 when turned off. However, the data is 0 when turned on and 1 when turned off. You may make it change into data. Further, as the data of the display status memories 10a2 and 6a2, the LED 5a is instructed to be turned off when it is 0, and the lighting is instructed when it is 1. On the contrary, when the data is 1, the LED 5a is turned off. You may change so that lighting may be instruct | indicated when data is 0.

  Similarly, in the function status memory 8, when the data is 1, the child safety mode is set and when the data is 1, the child safety mode is canceled. It may be changed so that the child safety mode is set when 0, and the child safety mode is canceled when the data is 1. Furthermore, the counter 9 counts when the data in the switch status memory 6a1 changes from 1 to 0. However, the counter 9 may count when the data changes from 0 to 1, and the data is 0. You may make it count when it changes in order of 1 and 0.

  In addition, in the embodiment, when the master server 1 transmits a signal instructing the slave server 2 to transmit data of the switch status memory 6a1, a signal indicating the display status is transmitted. The signal indicating the display status may be transmitted not at the time of transmission of the signal instructing transmission of the data but at another transmission timing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram illustrating a configuration of a main part of a vehicle control apparatus according to an embodiment of the present invention. It is a signal block diagram showing the signal format of the transmission signal transmitted between a master server and a slave server. It is a block diagram which shows the principal part structure which shows an example of the known vehicle control apparatus.

Explanation of symbols

1 Master server 2 Slave server 3 Bus line 4 Function switch (self-recovery function switch)
5 Function switch status display section (display section)
6 Main control unit 7, 11 Communication unit 8 Function status memory 9 Counter 10 Control unit

Claims (3)

A self-return function switch that outputs a predetermined signal every time an operation is performed and automatically returns to a non-operation position, a display unit having at least two different display states, and the self-return function switch and the display unit are connected. The self-return function switch is turned on or off, and a switch status signal is transmitted, and a display status signal for determining the display state of the display unit is received to display the display unit in a predetermined state. And a slave server having a control unit for receiving the switch status signal, rewriting the stored data in the function status memory in accordance with the received signal, and controlling the controlled unit provided in the vehicle according to the stored data A master server having a main control unit that controls in a predetermined mode, and between the master server and the slave server The master server transmits a request signal through the bus line at predetermined time intervals, and the slave server transmits the request signal through the bus line in response to receiving the request signal. A signal indicating the switch status is transmitted, and the main control unit forms the display status signal in accordance with data stored in the function status memory at predetermined time intervals, and transmits the display status signal from the master server through the bus line. The vehicular control device, which transmits to the slave server. The vehicular control device according to claim 1, wherein the master server transmits the display status signal to the slave server through the bus line when the request signal is transmitted. The main control unit is provided with a counter that counts one operation of the self-returning function switch according to the switch status signal, and alternately switches the data stored in the function status memory every time the counter is counted, 3. The mode according to claim 1 or 2, wherein the mode is switched between a predetermined mode and a release mode of the predetermined mode according to the stored data, and at the same time, the display unit is set to two display states different in lighting and extinguishing. Vehicle control device.

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