JP2014201092A - Opening/closing member control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening/closing member control device enabling quick filling an enormous amount of data, and capable of securing redundancy and reliability.SOLUTION: An opening/closing member control device 1 includes a control part 12 having: a storage unit 12B for storing control data; a RAM12C for temporarily storing the control data read from the storage unit 12B; and a central processing unit 12A bearing the center of opening/closing control of an opening/closing member by using the control data stored in the RAM12C. The one piece of the control data is filled in as the same data row in a plurality of sectors of the storage unit 12B, and a vehicle ignition signal is read to the RAM12C as a trigger. Reading to the RAM12C is sequentially read from the plurality of sectors in the storage unit 12B before confirming that normal control data are received, and only control for a specified state is permitted when it is not confirmed that the RAM12C receives the normal control data.

Description

  The present invention relates to an opening / closing member control device, and more particularly to an opening / closing member control device which is mounted on a vehicle and has improved control data writing expandability and reliability.

2. Description of the Related Art Recently, various types of vehicle-mounted devices such as opening / closing member devices (power window devices) are mounted in vehicles. Such vehicle-mounted devices are controlled by an electronic control unit (hereinafter simply referred to as “ECU”). It is controlled in such a control unit.
At the time of manufacturing the control unit, basic initial data set for each vehicle is written in a storage device such as a storage device mounted on the control unit.
In performing data writing in this way, a technique for writing data into a nonvolatile storage device has been developed (see, for example, Patent Document 1).

Patent Document 1 discloses a nonvolatile semiconductor memory device.
In Patent Document 1, replacement information for a redundant circuit and adjustment information for an electric trimming circuit are stored in a part of a memory array of a nonvolatile semiconductor memory device, and the information is transferred to a latch circuit or a register when the power is turned on. It is disclosed.

JP 2002-150789 A

On the other hand, in such a conventional storage device, a plurality of data is usually written in one sector in order to provide redundancy.
However, when the amount of data written to a storage device such as a storage device becomes huge, such as an opening / closing member control device (so-called power window control device) that is a control device for a vehicle-mounted device, a plurality of data are stored together. When the method of writing in one sector is adopted, there is a problem that a microcomputer having a large sector size is required and the cost is increased.
Also, if multiple data are written in one sector, if a data error occurs in that sector (for example, bit string failure, byte failure, sector failure, etc.), it is impossible to read the entire data. There was a problem.
For this reason, a failure is induced, and it is difficult to ensure reliability.

  An object of the present invention is to solve each of the above-mentioned problems, and it is possible to write a huge amount of data without increasing the cost, and it is possible to ensure redundancy and reliability. It is to provide a control device.

  According to the opening / closing member control device according to the present invention, the above-described problem is a storage device that stores control data, a RAM that temporarily stores control data read from the storage device, and the RAM. A central processing unit that plays a central role in controlling the opening and closing of the opening and closing member using the stored control data, and a control unit configured to have one control unit The control data is written in the plurality of sectors of the storage device as the same data string, and the control data stored in the storage device is read out to the RAM using a vehicle ignition signal as a trigger. The reading to the RAM is sequentially read from the plurality of sectors of the storage device until it is confirmed that the normal control data is received by the RAM. When it has received the patronage data is not confirmed, it is solved by not allowing only a control to a particular state.

With this configuration, redundancy can be ensured by storing the same control data in a plurality of sectors, and the control data can be read from each sector of the storage device to the RAM.
In other words, if any abnormality occurs in the upper sector and the control data is broken, a trial for sequentially accessing the next sector and reading normal control data can be executed.
When normal control data is not confirmed, only specific control is permitted (for example, abnormal processing), so that high reliability can be ensured.

In addition, since the same control data is simultaneously written in multiple sectors, it can be used even if the sector size is smaller than the conventional method of writing multiple control data in the same sector. And cost increase can be suppressed.
The time for writing control data to the storage device can be shortened, and workability is improved.
This becomes more effective as the amount of control data increases.
Any storage device may be used as long as it does not depart from the spirit of the present invention (for example, ROM). However, it is highly versatile and can be used for control even when the power is shut down. A data flash which is a nonvolatile memory in which data is held is preferably used.

As specific control, as in claim 2, reading of the control data from the storage device sequentially targets the data strings stored in a plurality of sectors one by one, and the RAM is normal. It is preferable to end the process when it is confirmed that the information data has been received.
With this configuration, if some abnormalities occur in the upper sector and the control data is corrupted, the next sector is accessed sequentially and normal control data is read. Can improve reliability.

Further, as in claim 3, the control to the specific state is performed by sequentially reading the data strings stored in the plurality of sectors of the storage device one by one, and reading of all the data strings is completed. This is preferably executed when it is not confirmed that the RAM has received the normal information data.
With this configuration, it is possible to shift to a specific state (for example, an abnormal mode) without performing normal operation when an abnormality occurs in the entire storage device for some reason. Improves.

According to the present invention, redundancy is ensured by simultaneously writing the same control data to a plurality of sectors, so a huge amount of data can be written quickly without increasing the cost as compared with the prior art. Is possible.
Further, by making it possible to sequentially access a plurality of sectors, when there is an abnormality in the upper sector, normal control data can be read from the next sector, thereby improving reliability.
In addition, if normal control data cannot be acquired even after sequentially reading control data from multiple sectors, normal operation is not performed and the state is shifted to a specific state (eg, abnormal mode). Therefore, the reliability is further improved.

It is an electrical block diagram of the vehicle equipment control apparatus which concerns on one Embodiment of this invention. It is a data structure conceptual diagram of the data flash which concerns on one Embodiment of this invention. It is explanatory drawing which shows the structure and data communication of a microcomputer which concern on one Embodiment of this invention. It is a control flowchart of the opening-and-closing member control control device concerning one embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Note that the configuration described below does not limit the present invention and can be variously modified within the scope of the gist of the present invention.
The present embodiment relates to an opening / closing member control device configured to be able to quickly write a huge amount of data without increasing costs and to ensure redundancy and reliability.

  1 to 4 show an embodiment of the present invention. FIG. 1 is an electrical configuration diagram of an opening / closing member control device, FIG. 2 is a conceptual diagram of a data configuration of a storage device, and FIG. 3 is a configuration of a microcomputer. FIG. 4 is a control flowchart of the opening / closing member control device.

The configuration of the opening / closing member control apparatus 1 according to this embodiment will be briefly described with reference to FIG.
A vehicle (not shown) according to this embodiment is equipped with a power window device P as a device for opening and closing a window glass (not shown) that is an opening and closing member.
The opening / closing member control device 1 according to the present embodiment is responsible for the control center of the power window device P.
That is, the opening / closing member control device 1 is a control device for controlling a vehicle-mounted device called a “power window device”.

The opening / closing member control apparatus 1 according to this embodiment is a so-called ECU (Electronic Control Unit), and includes a power supply circuit 11, a microcomputer 12, an input circuit 13, a drive circuit 14, a Hall IC 15, an output circuit 16, and a communication interface 17. Configured.
The power supply circuit 11 is connected to a battery 20 provided outside, and supplies power to the microcomputer 12.

The microcomputer 12 is a microcomputer that plays a central role in control. The CPU 12A is a central processing unit, the data flash 12B is a storage device, a RAM 12C (Random Access Memory), and a ROM 12D (Read Only Memory) in which necessary data is appropriately stored. ) And the like.
The microcomputer 12 corresponds to a “control unit”.
The data flash 12B is a non-volatile memory and retains written data even when the power is shut down.
In the present embodiment, the data flash 12B is used, but a normal ROM can also be used.

The drive circuit 14 transmits a command from the microcomputer 12 to an external motor M, and a window glass (not shown) is driven up and down by the motor M via a known drive system.
The input circuit 13 receives the up command UP and the down command DN from the external window operation switch SW and transmits them to the microcomputer 12, and the output circuit 16 sends the signal from the microcomputer 12 to the window device switch SW. Output to the side.
The communication interface 17 is an interface that communicates with another on-board equipment control ECU, and an ignition on signal and an ignition off signal from an ignition control ECU (not shown) are input via the communication interface 17. The
The Hall IC 15 performs position detection.

The data structure of the storage device 12B according to the present invention will be described with reference to FIG.
Data for controlling the power window device P is stored in the storage device 12B.
FIG. 2A shows the data configuration of the storage device 12B according to the present embodiment, and FIG. 2B shows the data configuration of the conventional storage device for comparison.

The effectiveness of this embodiment will be described by comparing FIGS. 2 (a) and 2 (b).
In this embodiment, as shown in FIG. 2A, redundancy is ensured by recording the same control data in two sectors.
For example, in the illustrated example, the dead zone data is written as “Data 1”, the threshold value data as “Data 2”, the seat position data as “Data 3”, and so on. At this time, the same data is simultaneously written in sector 1 and sector 2.
In this example, redundancy is ensured in this way.

However, as shown in FIG. 2B, in the conventional example, in the same sector, two data 1 are continuously written, then two data 2 are continuously written, and so on.
Therefore, in the conventional example, the number of data that can be written is halved compared to the “method of simultaneously writing to different sectors” as in the present embodiment.
In particular, when the control becomes complicated and the control data needs to be written in an enormous amount as in recent vehicle-mounted devices, this problem becomes significant.
In addition, as shown in FIG. 2B, there is a problem that data reliability is lowered when a bit string failure or byte failure occurs or when the entire sector 1 fails.

  However, as shown in FIG. 2A, in the present embodiment, even when a bit string failure or byte failure occurs in the sector 1 or when the entire sector 1 fails, the data in the sector 2 is read out. If possible, the reliability of the data can be ensured.

More specifically, as shown in FIG. 3, when an opportunity occurs (in this embodiment, the ignition switch is turned on or off), the control data of the data flash 12B is read to the RAM 12C. Initially, control data is read from sector 1.
At this time, if the control data for sector 1 is normal, this control data (control data read from sector 1) is used. If this control data is not normal, then control for sector 2 is performed. Data is read out.
As described above, the present embodiment is configured to ensure the reliability of the control data.

Next, the flow of control will be described in detail with reference to FIG.
FIG. 4B shows a conventional control flow.
Although description is omitted, step numbers are assigned so that the first digit of the step number corresponds to the step number of FIG. 4A which is the processing according to the present embodiment.
This control is executed by the CPU 12A mounted on the microcomputer 12.
First, the CPU 12A starts processing on the condition (trigger) that the ignition switch of the vehicle is turned on or turned off.
When the process starts, the control data is read from the data flash 12B to the RAM 12C in step S1.

In the present embodiment, as described above, the same data string is stored in sector 1 and sector 2.
Therefore, first, in step S3, the upper level sector 1 of the data flash 12B is accessed and the control data written in the sector 1 is read.
Next, in step S3, it is determined whether normal control data has been read from the sector 1 of the data flash 12B.

If it is determined in step S3 that normal control data has been read (step S3: Yes), the process shifts to the normal mode in step S4 and the process is terminated.
If it is determined in step S3 that normal control data has not been read from the sector 1 of the data flash 12B (step S3: No), in step S5, the data is transferred to the sector 2 of the data flash 12B, which is the lower level. Access and read the control data written in the sector 2.
Next, in step S6, it is determined whether normal control data has been read from the sector 2 of the data flash 12B.

If it is determined in step S6 that normal control data has been read (step S6: Yes), in step S7, the process shifts to the normal mode and the process ends.
If it is determined in step S6 that normal control data has not been read from the sector 2 of the data flash 12B (step S6: No), the process shifts to fail mode and ends in step S8.

Thus, in the present embodiment, control data stored in different sectors can be sequentially read.
Therefore, redundancy can be ensured.
In addition, normal control data can be read to the RAM 12C, and if normal control data cannot be read from all sectors, the mode can be shifted to the fail mode (abnormal mode). Therefore, high reliability can be ensured.
In the present embodiment, since the same control data is written in sector 1 and sector 2, respectively, the read mode is shifted to the fail mode when two read trials fail, but the number of trials is the number of sectors used. It can be increased by increasing.

1. ・ ECU,
11 .. Power supply circuit,
12. Microcomputer,
12A, CPU, 12B, data flash (storage device), 12C, RAM,
12D · · ROM,
13. Input circuit,
14 .... Drive circuit, 15 .... Hall IC, 16 .... Output circuit,
17. Communication interface,
20. Battery
M ・ ・ Motor, P ・ ・ Power window device, SW ・ ・ Operation switch

Claims (3)

A storage device for storing control data;
RAM for temporarily storing control data read from the storage device;
A central processing unit that plays a central role in the opening / closing control of the opening / closing member using the control data stored in the RAM,
An opening / closing member control device comprising:
One piece of the control data is written as the same data string in a plurality of sectors of the storage device,
The control data stored in the storage device is read into the RAM using a vehicle ignition signal as a trigger,
Reading to the RAM is sequentially read from the plurality of sectors of the storage device until it is confirmed that the RAM has received the normal control data,
When it is not confirmed that the RAM has received the normal control data, only the control to a specific state is permitted.   Reading of the control data from the storage device is sequentially performed for each of the data strings stored in the plurality of sectors one by one, and is completed when it is confirmed that the RAM has received the normal information data. The opening / closing member control apparatus according to claim 1. In the control to the specific state, the data strings stored in the plurality of sectors of the storage device are sequentially read one by one, and when the reading of all the data strings is completed, the RAM is normal. The opening / closing member control apparatus according to claim 1, which is executed when it is not confirmed that the information data has been received.

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