JP6765343B2 - Rewriting system, rewriting device and computer - Google Patents

Description

The present invention relates to a rewriting system, a rewriting device and a computer.

Recent automobiles are equipped with an ECU (computer) for engine control, running control, navigation, information communication, and the like. Due to the sophistication and diversification of information processing in automobiles, in-vehicle software is being actively improved and newly developed, and it is becoming necessary to consider upgrading the program after the vehicle is sold.

Patent Document 1 describes a technique for rewriting a program for vehicle control or the like.

Japanese Unexamined Patent Publication No. 2000-43654

Here, in the above-mentioned technology, when rewriting, since the content to be left as it is without being rewritten and the content to be rewritten are linked and the entire content is written to the ECU, there is a problem that the rewriting time tends to be long. is there.

The present invention has been made in view of the above background, and an object of the present invention is to provide a rewriting system capable of shortening the rewriting time, a rewriting device used in the rewriting system, and a computer.

The rewriting system according to the first aspect of the present invention is a rewriting system including a computer having a memory and a rewriting device for transmitting at least the rewriting data of the stored contents stored in the memory to the computer. The memory in the computer has a rewrite target area in which stored contents to be rewritten are stored and a non-rewrite target area in which stored contents not to be rewritten are stored. , The rewriting data of the stored contents is transmitted to the computer only for the stored contents of the rewriting target area in the memory, and the rewriting target area is a program area in which one or more programs are stored, and the one. A variable area in which variables used in processing are stored for each of the above programs, and a setting value in which setting values used in processing are stored for each of the one or more programs. The rewriting device has an area, and the rewriting device is arbitrary of a program stored in the program area, a variable stored in the variable area, and a set value stored in the set value area. One or more data of the above is selected, and the rewriting data of the one or more data is stored in any of the program area, the variable area, and the set value area. It includes address data that indicates whether or not it is done in area units, and it is transmitted in data units corresponding to one area, even when the corresponding data is combined and transmitted in order to rewrite the data in multiple areas. Transmission is performed in the data unit .

The rewriting device according to the second aspect of the present invention is a rewriting device that transmits at least the rewriting data of the stored contents stored in the memory of the computer to the computer, and the memory is the target of rewriting. It has a rewrite target area where the stored contents are stored and a rewrite target area where the stored contents that are not the rewrite target are stored, and the rewritten contents are rewritten only for the stored contents of the rewrite target area in the memory. Data is transmitted to the computer, and the rewrite target area stores a program area in which one or more programs are stored and a variable used in processing for each of the one or more programs. Each of the variable area and the one or more programs has a set value area in which the set value used in processing is stored, and the program stored in the program area, said. Select any one or more data from the variables stored in the variable area and the set values stored in the set value area, and rewrite the one or more data to the one or more. Data is transmitted in data units corresponding to one area, including address data indicating which area of the program area, the variable area, and the set value area is stored in each area. Even when the corresponding data is combined and transmitted in order to rewrite the data in a plurality of areas, the data is transmitted in the data unit .

The computer according to the third aspect of the present invention is a computer that has a memory and receives at least the rewriting data of the stored contents of the memory from the rewriting device, and the memory stores the stored contents to be rewritten. The rewrite target area has a rewrite target area and a non-rewrite target area in which stored contents that are not rewrite targets are stored, and the rewrite target area includes a program area in which one or more programs are stored and the one or more. A variable area in which variables used in processing are stored for each of the programs, and a setting value area in which setting values used in processing are stored for each of the one or more programs. And, any one selected from the program stored in the program area, the variable stored in the variable area, and the set value stored in the set value area. Rewriting data of one or more data includes address data indicating in each area which of the program area, the variable area, and the set value area the one or more data is stored. In this state, it is received in the data unit corresponding to one area, and the rewriting target area in the data unit is rewritten with reference to the address data, and it corresponds to rewriting the data in a plurality of areas. Even when data is combined and transmitted, reception is performed in the data unit.

As described above, according to the first, second, and third aspects, since the rewriting data is transmitted only for the stored contents of the rewriting target area in the memory of the computer, the rewriting time can be shortened.

According to the first, second and third aspects, the rewriting time can be further shortened because the rewriting data is transmitted only for the data selected by the rewriting device for the stored contents of the rewriting target area.

It is a block diagram which shows one Embodiment of the rewriting system of this invention. It is a block diagram which shows the structure of the flash ROM of the ECU shown in FIG. It is the flowchart which showed the operation of the rewriting system shown in FIG. 1 and FIG.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a block diagram showing an embodiment of the rewriting system of the present invention. FIG. 2 is a block diagram showing a configuration of the flash ROM of the ECU shown in FIG.

The rewriting system 1 of the present invention includes a plurality of ECUs (computers) 10 and a rewriting device 20 for rewriting the programs of these ECUs 10. The plurality of ECUs 10 are arranged in each part of the vehicle and are connected to each other by a communication line 30 so as to be able to communicate with each other. In the present embodiment, the plurality of ECUs 10 are bus-connected by the communication line 30 and are connected to each other so as to be able to communicate with each other. The communication line 30 is provided with a connecting portion 40 for detachably connecting the rewriting device 20.

Each of the plurality of ECUs 10 has an interface (hereinafter, I / F) 11, an input circuit 12, an output circuit 13, and a microcomputer (hereinafter, a microcomputer) 14. The I / F 11 is a communication interface for communicating with another ECU 10 and the rewriting device 20. In the present embodiment, the I / F 11 is an interface capable of inputting / outputting signals corresponding to various communications (CAN, LIN, and other communication methods).

The input circuit 12 is a circuit in which a signal from the local switch (hereinafter, local SW) 50 is input. In FIG. 1, only the signal from the local SW50 is input to the input circuit 12, but the input is not limited to this, and other inputs such as AD input and PWM input obtained by A / D converting the outputs of various sensors. It may have been.

The output circuit 13 is a circuit to which a load such as a valve 61 or a motor 62 is connected. In FIG. 1, only the valve 61 and the motor 62 are connected to the output circuit 13, but the present invention is not limited to this, and a load mounted on the vehicle may be connected.

The microcomputer 14 is composed of a CPU (Central Processing Unit) 14A, a flash ROM (Read Only Memory) 14B, and a RAM (Random Access Memory) 14C. The CPU 14A controls the entire ECU 10 and performs various processes according to a processing program. The flash ROM 14B (memory) is a memory for storing a processing program or the like performed by the CPU 14A. The RAM 14C is a memory having a work area used in various processing processes in the CPU 14A, a data storage area for storing various data, and the like.

As shown in FIG. 2, the flash ROM 14B has two areas, a rewrite target area A1 and a rewrite target area A2.

In the area A1 not subject to rewriting, stored contents (programs, variables, setting values) that are not subject to rewriting are stored. In the present embodiment, the basic control program area A11, the communication control program area A12, the variable area A13, the set value area A14, and the rewrite program area A15 are formed in the area A1 not subject to rewriting. ..

In the basic control program area A11, a basic program for periodically executing various programs is stored. In the communication control program area A12, a communication program for executing communication processing such as CAN and LIN is stored. In the variable area A13, variables necessary for executing each program in the area are stored. In the set value area A14, set values (threshold value, minimum value, maximum value, value used for conditional branching, counter value, initial value, etc.) necessary for executing each program in the area are stored. The rewrite program area A15 stores a rewrite program for executing the rewrite process of the rewrite target area A2.

In the rewrite target area A2, the stored contents to be rewritten are stored. In the present embodiment, the rewrite target area A2 is formed with three areas, a program area A21, a variable area A22, and a set value area A23.

The program area A21 is formed with an input determination control program area A211, a base application control program area A212, a special application control program area A213, and an output determination control program area A214.

In the input determination control program area A211, an input determination program for executing communication via the I / F 11 and input determination processing of the input via the input circuit 12 is stored. In the base application control program area A212, a base application program for executing the load ON / OFF determination process according to the result of the input determination process is stored. In the special application control program area A213, a special application program used when a process other than a simple input determination process is required to execute the load ON / OFF determination process is stored.

Here, as a special application program, setting processing of frequency and on-duty ratio when PWM output is performed from output circuit 13, calculation processing using input analog data, fixed values such as threshold value, minimum value, and maximum value are set. A program for executing the process used, the process of determining the ON / OFF of the load by combining the results of several input determination processes, the process of determining the ON / OFF of several loads based on the results of the input determination process, etc. Can be mentioned.

Further, in the output determination control program area A214, an output determination program for executing the output determination process according to the result of the load ON / OFF determination process is stored.

The variable area A22 is formed with an input determination control variable area A221, a base application control variable area A222, a special application control variable area A223, and an output determination control variable area A224.

In the input determination control variable area A221, variables necessary for executing the input determination process according to the input determination program are stored. In the base application control variable area A222, variables necessary for executing the load ON / OFF determination process according to the base application program are stored. In the special application control variable area A223, variables necessary for executing processing according to the special application control program are stored. In the output determination control variable area A224, variables necessary for executing the output determination process according to the output determination program are stored.

The setting value area A23 includes an input determination control setting value area A231, a base application control setting value area A232, a special application control setting value area A233, and an output determination control setting value area A234.

In the input determination control setting value area A231, a setting value necessary for executing the input determination process according to the input determination program is stored. In the base application control setting value area A232, a setting value necessary for executing the load ON / OFF determination process according to the base application program is stored. In the special application control setting value area A233, the setting values necessary for executing the process according to the special application control program are stored. In the output determination control setting value area A234, setting values necessary for executing the output determination process according to the output determination program are stored.

The rewriting device 20 includes a microcomputer (not shown). The microcomputer has a well-known CPU, ROM, and RAM. The rewriting device 20 has a storage device (not shown), and a plurality of rewriting data are stored in the storage device. Each of the plurality of rewrite data includes address data indicating an area of the flash ROM 14B. By checking this address data, it is possible to know which of the program area A21, the variable area A22, and the set value area A23 is the area for writing the rewrite data.

Further, the storage device stores the ID (identification information) of the ECU 10 to be rewritten for each rewrite data. From this, it is possible to know to which ECU 10 the rewrite data should be transmitted.

Next, the operation of the rewriting system 1 having the above-described configuration will be described below with reference to the flowchart of FIG.

FIG. 3 is a flowchart showing the operation of the rewriting system shown in FIGS. 1 and 2.

In the process represented by this flowchart, the operator first connects the rewriting device 20 to the connection unit 40 provided on the communication line 30 (S11). The CPU of the rewriting device 20 (hereinafter, simply abbreviated as the rewriting device 20) starts the rewriting process according to the connection to the communication line 30.

Further, the operator operates the local SW50 of the ECU 10 to be rewritten and inputs a rewrite signal to each ECU 10. The CPU 14A of each ECU 10 (hereinafter, simply abbreviated as ECU 10) starts processing according to the power supply. When the rewriting signal is input from the local SW50 (Y in step S21), the ECU 10 starts the rewriting process (step S22) and ends the process.

On the other hand, if the rewrite signal is not input from the local SW50 (N in step S21), the ECU 10 starts the normal process (step S23) and ends the process.

In the rewriting process (step S22), the ECU 10 transmits a rewriting request (step S221). If the rewriting device 20 cannot receive the rewriting request from the ECU 10 within a predetermined time after executing the rewriting process (N in step S12), the rewriting device 20 stops the rewriting (step S13) and ends the rewriting process.

When the rewriting device 20 receives the rewriting request from the ECU 10 within a predetermined time after executing the rewriting process (Y in step S12), the rewriting device 20 reads out the rewriting data written in the storage device (not shown). Then, the rewriting device 20 transmits the rewriting data to the ECU 10 that has transmitted the rewriting request (step S14).

At this time, in the present embodiment, when the ECU 10 is newly installed, the rewriting device 20 reads out and transmits the rewriting data for the entire rewriting target area A2. In addition, when the specifications are changed due to a change or addition of the drive load, the rewrite data for the corresponding program area in the program area A21, the corresponding variable area in the variable area A22, and the corresponding set value area in the set value area A23 are read and transmitted. To do. Further, when changing variables or set values such as a determination value or threshold value used for processing any program, the number of software filters, a timer counter value, or the like, the rewriting device 20 reads and transmits the following rewriting data. That is, in this case, the rewriting device 20 reads and transmits the rewriting data for the corresponding variable area in the variable area A22 and the corresponding set value area in the set value area A23. In this way, the rewriting device 20 reads out the corresponding data in order to rewrite any one or more data of the program in the program area A21, the variable in the variable area A22, and the set value in the set value area A23, and uses it as the rewritten data. Send. Further, at this time, it is also possible to read and transmit the corresponding data in combination in order to rewrite the data in a plurality of areas. Further, in the present embodiment, the rewriting device 20 transmits the selected and read rewriting data in data units corresponding to one area.

On the other hand, after transmitting the rewrite request (step S221), the ECU 10 determines whether or not the rewrite data has been received within a predetermined time (step S222).

If the rewrite data cannot be received within the predetermined time (N in step S221), the ECU 10 ends the rewrite process (step S223). On the other hand, when the rewrite data is received (Y in step S222), the ECU 10 erases the corresponding area of the flash ROM 14B corresponding to the address data included in the received rewrite data (step S224).

As described above, the rewriting device 20 arbitrarily selects the rewriting target according to the situation and transmits the rewriting data. In step S224, the area corresponding to the address data included in the rewriting data selected and transmitted by the rewriting device 20 is deleted in data units.

Next, the ECU 10 determines whether or not the flash ROM 14B has been successfully erased (step S225). In step S225, the ECU 10 reads the corresponding area and determines that the erasure is successful if 1 is written and that the erasure is unsuccessful if 0 is written. If the area erasure of the corresponding flash ROM 14B is not successful (N in step S225), the ECU 10 ends the rewriting process (step S223).

On the other hand, when the area erasure of the corresponding flash ROM 14B is successful (Y in step S225), the ECU 10 rewrites the data by writing the received rewriting data in the corresponding area (step S226). Next, the ECU 10 reads the corresponding area in order to determine whether or not the rewriting is successful (step S227). Subsequently, the ECU 10 determines that the rewriting is successful if the data read from the corresponding area is the same as the received rewriting data, and that the rewriting is unsuccessful if the data is different (step S228).

In step S228, the ECU 10 determines whether the rewriting is successful or unsuccessful. If the rewriting fails (N in step S228), the ECU 10 ends the rewriting process (step S223).

On the other hand, if the rewriting is successful (Y in step S228), the ECU 10 transmits the read data from the corresponding area to the rewriting device (step S229), and returns to step S222 to prepare for receiving the next rewriting data. .. In the second and subsequent steps S222, the ECU 10 determines whether or not the rewrite data has been received within a predetermined time after transmitting the read data.

After transmitting the rewriting data (step S14), the rewriting device 20 determines whether or not the read data has been received within a predetermined time (step S15).

If the read data cannot be received within the predetermined time (N in step S15), the rewriting device 20 ends the rewriting process (step S13). On the other hand, when the read data is received (Y in step S15), the ECU 10 determines whether or not the rewriting is successful by comparing the transmitted rewrite data with the received read data. (Step S16).

In step S16, the rewriting device 20 determines that the rewriting succeeds if the received read data is the same as the transmitted rewrite data, and that the rewrite fails if it is different. If the rewriting fails (N in step S16), the rewriting device 20 ends the rewriting process (step S13). On the other hand, if the rewriting is successful (Y in step S16), the rewriting device 20 determines whether or not the transmission of all rewriting data is completed (step S17). When the transmission of all rewriting data is completed (Y in step S17), the rewriting process is completed.

On the other hand, if untransmitted rewriting data remains (N in step S17), the process returns to step S14 to transmit the next rewriting data.

According to the rewriting system 1, the rewriting device 20, and the ECU 10 of the present embodiment described above, only the stored contents of the rewriting target area A2 in the flash ROM 14B of the ECU 10 are rewritten, so that the rewriting time can be shortened.

Further, according to the present embodiment, since only the data selected by the rewriting device 20 is rewritten with respect to the stored contents of the rewriting target area A2, the rewriting time can be further shortened.

It should be noted that the embodiments described above are merely representative embodiments, and are not limited to these embodiments. That is, the above-mentioned rewriting system, rewriting device, and computer can be variously modified and implemented without departing from the gist. Such modifications are, of course, included in the category as long as they still have the essential configurations of the rewriting system, rewriting device, and computer described above.

For example, in the above-described embodiment, the ECU 10 having the flash ROM 14B is exemplified as an example of the computer having the memory according to the present invention. However, the computer having the memory referred to in the present invention is not limited to this, and the specific mode thereof is not questioned.

Further, in the above-described embodiment, a basic control program, a communication control program, variables necessary for executing each program, and set values are exemplified as examples of the stored contents of the area not subject to rewriting according to the present invention. There is. Further, as an example of each of the stored contents of the rewrite target area referred to in the present invention, an input determination control program, a base application control program, a special application control program, variables necessary for executing each program, and set values are exemplified. There is. However, the storage content of the rewriting target area referred to in the present invention and the storage content of the rewriting target area referred to in the present invention are not limited to these, and can be appropriately set.

Further, in the above-described embodiment, as an example of the rewriting device according to the present invention, the ECU 10 is used to select and rewrite any one or more data selected according to the situation from the stored contents of the rewriting target area A2. The rewriting device 20 to be transmitted to is illustrated. However, the rewriting device referred to in the present invention is not limited to this, and may be, for example, one that transmits all the stored contents of the rewriting target area A2 regardless of the situation. However, as described above, the rewriting time can be further shortened by selecting and transmitting one or more data.

Further, in the above-described embodiment, as an example of the rewriting system according to the present invention, the rewriting vision system 1 in which the rewriting device 20 transmits the rewriting data and the ECU 10 receives the rewriting data to perform the rewriting is exemplified. However, the rewriting system referred to in the present invention is not limited to this, and the rewriting device 20 may also perform rewriting.

1 Rewriting system 10 ECU (computer)
14B flash ROM (memory)
20 Rewriting device A1 Area not subject to rewriting A2 Area subject to rewriting A21 Program area A22 Variable area A23 Set value area

Claims (3)

A rewriting system including a computer having a memory and a rewriting device for transmitting at least the rewriting data of the stored contents stored in the memory to the computer.
The memory in the computer has a rewrite target area in which the stored contents to be rewritten are stored and a non-rewrite target area in which the stored contents not to be rewritten are stored.
The rewriting device transmits rewriting data of the stored contents to the computer only for the stored contents of the rewritten target area in the memory.
The rewrite target area includes a program area in which one or more programs are stored, a variable area in which variables used in processing are stored for each of the one or more programs, and one or more of the above. Each of the programs of the above has a setting value area in which the setting value used for processing is stored.
The rewriting device selects any one or more data from a program stored in the program area, a variable stored in the variable area, and a set value stored in the set value area. An address indicating in an area unit which of the program area, the variable area, and the set value area the rewriting data of the one or more data is stored. The data is included and transmitted in the data unit corresponding to one area, and even when the corresponding data is combined and transmitted in order to rewrite the data in a plurality of areas, the transmission is performed in the data unit. A featured rewriting system. A rewriting device that transmits at least the rewriting data of the stored contents stored in the memory of the computer to the computer.
The memory has a rewrite target area in which the stored contents to be rewritten are stored, and a non-rewrite target area in which the stored contents not to be rewritten are stored.
Rewriting data of the stored contents is transmitted to the computer only for the stored contents of the rewritten target area in the memory.
The rewrite target area includes a program area in which one or more programs are stored, a variable area in which variables used in processing are stored for each of the one or more programs, and one or more of the above. Each of the programs of the above has a setting value area in which the setting value used for processing is stored.
Select any one or more data from the program stored in the program area, the variable stored in the variable area, and the set value stored in the set value area, and the one or more. The rewriting data of the above data includes address data indicating in each area which of the program area, the variable area, and the set value area the one or more data is stored. A rewriting device that transmits in data units corresponding to one area, and transmits in the data units even when the corresponding data are combined and transmitted in order to rewrite the data in a plurality of areas. .. A computer that has a memory and receives at least the rewriting data of the stored contents of the memory from the rewriting device.
The memory has a rewrite target area in which the stored contents to be rewritten are stored, and a non-rewrite target area in which the stored contents not to be rewritten are stored.
The rewrite target area includes a program area in which one or more programs are stored, a variable area in which variables used in processing are stored for each of the one or more programs, and one or more of the above. Each of the programs of the above has a setting value area in which the setting value used for processing is stored.
Rewrite data of any one or more data selected from the program stored in the program area, the variable stored in the variable area, and the set value stored in the set value area. In one area, including address data indicating in each area which of the program area, the variable area, and the set value area the one or more data is stored. It is received in the corresponding data unit, and the rewriting of the rewriting target area in the data unit is performed with reference to the address data , and the corresponding data is combined and transmitted in order to rewrite the data in a plurality of areas. A computer characterized in that data is received even in the case .

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