JPH06255430A - Monitor control data transfer method of vehicle - Google Patents

Abstract

PURPOSE:To reduce the time required from the starting of a vehicle monitor control system to the entry into a normal condition by recording the data transferred from #N-2 unit by #N-1 unit of the second round of the data transfer, so as to collect the initial data to the units. CONSTITUTION:Since the #1 unit is the own unit, it delivers a starting confirming signal to the next #2 unit. When the startings of all the units are confirmed, an initial data collector 2 instructs a data transfer controller 6 to transfer the initial data of the own unit to the #2 unit, so as to transfer the data. The initial data collector 2 records the transferred data in a memory 7, and instructs the data transfer controller 6 to transfer the recorded data to the #2 unit, so as to transfer the data and to finish the process, and then, a normal operation is started. Since the units after the #2 unit has no record of the initial data, the second round of the data transfer is carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supervisory control data transfer device for transferring data between units of a vehicle supervisory control system.

[0002]

2. Description of the Related Art In today's vehicles, a large number of electronic devices are installed in order to improve performance, safety, comfort during driving, etc. Control signals are being transferred.

When such many monitoring control signals are connected by individual signal lines, the wiring harness becomes huge,
Since it is necessary to make a wire harness for each vehicle type, a vehicle monitoring control system as shown in FIG. 4 has been developed today. In FIG. 4, 20 to 23 are units, and 24 is a multiple signal line for transferring supervisory control data between the units.

The supervisory control signal of the equipment mounted on the vehicle is divided according to the positional relationship and the function of the equipment, and is connected to any of the units 20 to 23. Each unit is provided with a processor, processing is performed by the processor, and supervisory control data is transferred to the required unit.

That is, for example, when the door switch 25 connected to the unit 22 is opened, processing is performed by the processor provided in the unit 22 (not shown) to turn on the room lamp 26 and also to the unit 21. The fact that the door switch has been opened is transferred via the multiple signal line 24, and the unit 21 turns on the warning light 27 at the driver's seat.

As shown in FIG. 5, the frame structure of a signal during data transfer between units is, from the beginning, a bit SOF indicating the beginning of the frame, a bit PRI indicating the priority of the frame to be transferred, and a transfer destination of the transfer data. , A bit DADR indicating the unit of the transfer data, SADR indicating the unit of the transfer data transfer source, and a bit DAT for transmitting the transfer data
A, bit CRC for checking errors during transfer,
It is composed of a bit EOD indicating the end of data, a bit RES for returning data transfer OK or not, and a bit EOF indicating the end of the frame.

Therefore, the transfer source unit sends out a bit other than RES, and the transfer destination unit judges whether or not the data transfer is from the DADR data to the own unit. If it is the own unit, the CRC check is OK. If there is, capture the data and ACK the RES bit
When the CRC check is NG, NAC is sent to the RES bit.

Further, since the multiple signal line 24 is shared by a plurality of units, data may be transmitted at the same time. In this case, which unit has higher priority in data transfer is given to a unit having a higher PRI bit priority.
By returning SADR as the CK signal, the transfer source can know that the data transfer was OK.

[0009]

As described above, the monitoring control data transfer method between units of the conventional vehicle monitoring control system is performed between the units. When the vehicle monitoring control system is activated, each unit enters the normal operating state after transferring the state data of the devices under it to another unit.

Therefore, when the system is started up, assuming that the number of units making up the system is N, it is necessary to transfer the data of its own unit to other N-1 units, for a total of N (N-1). Data transfer is performed twice.
That is, when N = 10, the normal state can be entered after the data transfer is performed 90 times in total.

As described above, since a large number of units of data are transferred at the time of activation of the conventional vehicle monitoring control system, it takes a long time to enter the normal state. SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle monitoring control data transfer device which is improved so as to shorten the time from the startup of the vehicle monitoring control system to the normal state.

[0012]

Means adopted by the present invention for solving the above-mentioned problems will be described. In the data transfer of the vehicle supervisory control system, the supervisory control data is divided into several units (N) and the supervisory control data is transferred between the units via multiple signal lines. The unit uses the initial data of its own unit #
(B) The #n unit records the data transferred from the # n-1 unit, adds the initial data of its own unit to the transferred data, and transfers the data to the # n + 1 unit. ) The supervisory control of the vehicle characterized in that the # N-1 unit of the second round of data transfer records the data transferred from the # N-2 unit and collects the initial data in each unit. Data transfer method.

[0013]

The operation will be described by taking as an example the case where the system is composed of five units as shown in FIG. When the vehicle monitoring control system is activated, the # 1 unit first transfers the initial data of its own unit to the # 2 unit.

The # 2 unit records the data transferred from the # 1 unit, adds the initial data of its own unit to the data transferred from the # 1 unit, and transfers the data to the # 3 unit. The data will be sequentially transferred below.

When the data is transferred to and recorded in the # 4 unit, which is the unit immediately before the end of the second round of the data transfer, the transfer of the initial data is completed. When the initial data is sequentially transferred between the units in this way, the recording of the initial data of all the units is completed in each unit.

As described above, the transfer of the initial data from the # 1 unit is started, the #n unit records the data transferred from the # n-1 unit, and the initial data of its own unit is added to the # n + 1 unit. Since each unit completes the recording of all the initial data, the number of data transfers is 2N-2, which is N (N-1) in the past. It is possible to shorten the time required to enter the normal state when the vehicle monitoring control system is started.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 is a configuration diagram of an embodiment of the present invention, FIG. 2 is an operation flowchart of a master unit of the embodiment, and FIG. 3 is an operation flowchart of other units.

The structure of all the units described with reference to FIG. 4 is the same as that of FIG. In FIG. 1, reference numeral 1 is a mode change unit for changing between a sleep mode for reducing power consumption of a unit and a normal operation mode, 2 is an initial data collecting unit for collecting initial data of each unit, and 3 is unit monitoring. A processing unit 4 for performing control processing is a multiple signal line 1
0 own unit data determination unit that determines whether the data transferred via 0 is data to the own unit, 5 is a transfer error determination unit that determines a transfer data error, and 6 is data through the multiple signal line 10. A data transfer control unit that controls transfer,
7 is a memory, 8 and 9 are interfaces (I / O),
10 is a multiple signal line, 11 is an ignition switch (I
GSW) and 12 are processors (CPU) that perform processing.

When the unit is in sleep mode, CP
The clock for operating U12 is stopped or has a very low frequency. In the operation mode, the clock has a normal frequency, and the change is performed by the mode changing unit. In the description of the embodiment, in the case where the number of units forming the supervisory control system is N, the # 1 unit is the master unit, and the IGSW 11 of the # 1 unit is turned on, the system shifts from the sleep state to the normal state. Will be described with reference to FIGS. 2 and 3.

First, the operation of the master unit will be described with reference to FIG. When the process S1 IGSW11 is turned on, the IGSW ON signal is I /
Although it is input through O8, it is also transferred to the mode changing unit 1 by a signal line (not shown), and the CPU 12 is operated with a normal clock to put the master unit into the normal mode. Also, I
A start signal is sent to another unit via / O9.

Process S1 'In process S1', the processing unit 3 collects the state of the equipment input via the I / O 11 and records it in the memory 7. Processes S2 to S4 The initial data collection unit 2 sets the count value of the counter (not shown) to 1 (S2), then increments the count value of the counter by 1 in S3, and activates the unit whose number corresponds to the count value of the counter. The data transfer control unit 6 is instructed to send a confirmation signal and sent (S4).

That is, since the # 1 unit is its own unit, the start confirmation signal is sent to the next # 2 unit. Processes S5 to S6 If the # 2 unit is activated, ACK is returned to the RES bit of the data frame transmitted in process S4.

The return of the ACK is performed by the data transfer control unit 6 of the # 2 unit. When the ACK is returned, the process proceeds to step S6, and when it is not returned, the process proceeds to step S4 and steps S5 and S6 are repeated. Subsequently, in process S6, it is determined whether or not the count value n of the counter is equal to N of the final unit number. If they are not equal, the process proceeds to process S3 and S3 to
S6 is repeated.

Step S7 When the activation of all units is confirmed in Step S6, the initial data collection unit 2 instructs the data transfer control unit 6 to transfer the initial data of its own unit to the # 2 unit and transfers the data. To do.

Process S8 The own unit data judging section 4 constantly monitors the data sent to the multiplex signal line 10, and DADR of FIG.
That is, if the address is # 1 and the CRC check in the transfer error determination unit 5 is OK, the process proceeds to step S9.

Processes S9 and S10 The initial data collecting unit 2 records the transferred data in the memory (S9), and instructs the transfer data control unit 6 to transfer the data recorded in the process S9 to the # 2 unit. Data transfer is performed, processing is terminated, and normal operation is started.

That is, since the units other than the master unit sequentially add and transfer the initial data of the own unit as will be described later, the data recorded in the memory in the process S9 includes the initial data of all the units. Has been. However, since the initial data of all the units after # 2 are not recorded, the data transfer of the second cycle is performed in the process S10.

Next, the operation of the #n units other than the master unit will be described with reference to FIG. When the data is transmitted to the multiplex signal line 10 in the processing S4 of the # 1 master unit, each unit knows that the signal is transmitted to the multiplex signal line 10 through the I / O 9, and the connection line (not shown) The data is transferred to the mode changing unit 1 and the clock of the CPU 12 is operated at a normal value.

The self-unit determination section 4 of each of the processes S20 to S21 examines the bit of DADR described with reference to FIG. 5 in response to the activation signal described in the process S4 from the master unit, and determines whether or not it is that of its own unit. Is performed (S20).

If the determination result is YES, a CRC check is performed by the transfer error determination unit 5, and if there is no error, RES is performed.
ACK is sent to the bit and the process proceeds to step S22 (S2
1). Process S21 ′ In process S21 ′, the processing unit 3 collects the states of the devices connected via the I / O 11 and records them in the memory 7.

Processing S22 to S23 When each unit sends a start OK signal in processing S21,
Similar to the process S20, the own unit data determination unit 4 monitors whether or not the data is the transfer data to the own unit, and if YES, the process proceeds to the process S23 (S22).

If the determination in step S22 is YES, the initial data collection unit 2 records the initial data transferred from the master unit in step S7 in the memory 7 if the unit is the # 2 unit. If the unit is the #n unit, the #n sent in the process S24 described later is performed.
The initial data transferred from the -1 unit is recorded in the memory 7 (S23).

Process S24 In process S24, # 1 recorded in the memory 7 in process S23.
~ The initial data of its own unit is added to the initial data of # n-1 unit and transferred to # n + 1. Processes S25 to S27 Processes S25 to S27 are similar to the processes S22 to S24 described above. However, it is not necessary to add the initial data of the own unit in the process S27.

That is, each unit processes S22 to S2.
When 4 is executed to cycle through the units, the initial data of all the units are collected. That is, when transferring the initial data from the # 5 unit to the # 1 unit in FIG. 6, the transfer data is the initial data of all the units.

Therefore, in the data transfer of the second round of the processes S25 to S27, the # 1 unit records the initial data of the # 2 to #N units which are not recorded in the memory 7,
The # 2 unit need only record the initial data of the # 3 to #N units. Thereafter, the # 3 to # N-1 units sequentially record the initial data.

Further, since all the initial data are collected in the first round of the final unit of #N, the processes S25 to S27 are performed.
Does not need. Further, since the # N-1 unit only records the initial data of the #N unit which has not been recorded in the first round, and it is not necessary to transfer the initial data to the #N unit, the process S27 is deleted. It

When each unit collects the initial data as described above, the process is terminated and the normal operation of the supervisory control system is started. The system is started in the embodiment by turning on the IGSW 11 input to the master unit. However, if the state of the switch connected to the I / O is changed, the system can be started from any unit. Can also be activated.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various modifications can be made according to the gist of the invention.

[0039]

As described above, according to the present invention, the following effects can be obtained. Since the transfer of the initial data is started from the # 1 unit, the #n unit records the data transferred from the # n-1 unit, and the initial data of its own unit is added to the # n + 1 unit to transfer the data. The number of data transfers until each unit completes recording of all initial data is 2N-2 times compared with N (N-1) times in the past, and when the vehicle monitoring control system is started. It is possible to shorten the time required to enter the normal state.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is an operation flowchart of the master unit according to the embodiment.

FIG. 3 is an operation flowchart of each unit of the embodiment.

FIG. 4 is a configuration diagram of a vehicle monitoring control system.

FIG. 5 is a frame structure of data transfer between units.

FIG. 6 is an explanatory diagram of initial data collection.

[Explanation of symbols]

 1 Mode change unit 2 Initial data collection unit 3 Processing unit 4 Own unit data determination unit 5 Transfer error determination unit 6 Data transfer control unit 7 Memory 8, 9 Interface (I / O) 10 Multiple signal line 11 Ignition switch (IGSW) 12 Processor (CPU)

Claims (1)

[Claims] 1. In a data transfer of a vehicle monitoring control system, which is divided into a plurality of (N) units, and transfer of monitoring control data between the units is performed via a multiple signal line. a) # 1 unit transfers the initial data of its own unit to # 2 unit, (b) #n unit records the data transferred from # n−1 unit, and the initial data of its own unit is recorded in the transferred data. Is added to the # n + 1 unit, and (c) the # N-1 unit in the second round of data transfer is #N
-A method for transferring supervisory control data of a vehicle, characterized in that data transferred from the unit is recorded and initial data is collected in each unit.