JP6912954B2 - Rewriting system and computer - Google Patents

Description

The present invention relates to a rewriting system及beauty computer.

Recent automobiles are equipped with an ECU (computer) for engine control, driving 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 and the like.

Japanese Unexamined Patent Publication No. 2000-43654

Here, most ECUs control a plurality of loads mounted on a vehicle such as valves and motors as control targets. When a part of the control target is replaced with a new one, it may be necessary to rewrite the program or the like related to the control of the control target among the stored contents in the memory of the ECU. However, in many ECUs, it is not possible to partially rewrite the stored contents of the memory, and even if a part of the stored contents is rewritten, all the stored contents must be rewritten, so that more flexible rewriting is possible. Technology is required.

The present invention has been made in view of the above background, which can be flexible rewriting rewriting system, and has an object to provide a benzalkonium computer used in the rewriting system.

In order to solve the above problems, the rewriting system of the present invention communicates between a computer that controls a plurality of control targets and has a memory, and a plurality of computers for rewriting data of stored contents stored in the memory. A rewriting system including a rewriting device capable of performing the above, and the memory in the computer has storage contents used for controlling each of the plurality of control targets corresponding to the plurality of control targets. A plurality of channel areas to be stored are provided, and a mask setting unit for performing a mask setting process for setting a mask target area for prohibiting rewriting and a mask exclusion area for permitting rewriting among the plurality of channel areas is provided. The rewriting device transmits rewriting data of stored contents for all of the plurality of channel areas, and the computer uses the rewriting data corresponding to the mask exclusion area among the rewriting data transmitted from the rewriting device. Therefore, the stored contents of the mask exclusion area are rewritten.

Further, rewritten to apparatus for rewriting data of the contents stored in the memory of the computer for controlling a plurality of control target, a rewriting device capable of transmitting of the plurality of the computers, the in the computer The memory is provided with a plurality of channel areas in which the storage contents used for the control of each of the plurality of control targets are stored corresponding to the plurality of control targets, and the plurality of channel areas are rewritten. a masked area that prohibits, that sends a mask exclusion area which allows rewriting, have been subjected to the mask setting processing for setting, the rewriting data of all contents stored in the plurality of channels areas to the computer.

Further, in order to solve the above problems, the computer of the present invention is a computer that controls a plurality of control targets, has a memory, and receives rewriting data of the stored contents of the memory from the rewriting device. The memory is provided with a plurality of channel areas in which the storage contents used for the control of each of the plurality of control targets are stored corresponding to the plurality of control targets, and the plurality of channel areas are rewritten. Of the rewriting data transmitted from the rewriting device for all of the plurality of channel areas, a mask setting process for setting a mask target area for prohibiting rewriting and a mask exclusion area for allowing rewriting is performed. It is characterized in that the stored contents of the mask exclusion area are rewritten by using the rewrite data corresponding to the mask exclusion area.

According to rewrite system及beauty computer of the present invention, it or allow prohibits rewriting for any channel area in the mask setting section. As a result, it is possible to rewrite all the channel areas of the computer memory at once, rewrite only the desired channel area, and flexibly rewrite the memory of the computer.

On the other hand, the rewriting device does not need to know which channel area is prohibited or permitted to be rewritten, and simply transmits the rewriting data of all channel areas. Further, the computer simply receives the rewriting data and rewrites only the mask exclusion area for which rewriting is permitted in the mask setting process. Thus, according to the rewriting system及beauty computer of the present invention, it is also possible to shorten the rewrite time since the process required for rewriting is simple. Furthermore, since the processing required for rewriting is simple, it is possible to reduce rewriting errors.

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. It is a flowchart showing the mask setting process shown in 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 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 so as to be able to communicate with each other by a communication line 30. 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 connection unit 40 for detachably connecting the rewriting device 20 so as to be a device capable of communicating with a plurality of ECUs 10 via the communication line 30 and the connection unit 40. There is.

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 signals from CH1 to CHn local switches (hereinafter, CH1 to CHn local SW) 51 to 5n are input. In FIG. 1, only signals from CH1 to CHn local SW51 to 5n are input to the input circuit 12, but the present invention is not limited to this, and other AD inputs obtained by A / D converting the outputs of various sensors are used. PWM input or the like may be input.

The output circuit 13 is a circuit to which CH1 to CHn loads 61 to 6n are connected as various loads mounted on a vehicle such as a valve or a motor. The ECU 10 is a device that controls these CH1 to CHn loads 61 to 6n. In the present embodiment, these CH1 to CHn loads 61 to 6n have a one-to-one correspondence with the above-mentioned CH1 to CHn local SW 51 to 5n.

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, set 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 / set value area A13, and the rewrite program area A14 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. Variables / setting values Area A13 stores variables and setting values necessary for executing each program in the area. As the set value, a threshold value, a minimum value, a maximum value, a value used for conditional branching, a counter value, an initial value, and the like are stored. The rewrite program area A14 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 provided with channels 1 to channel n program areas (CH1 to CHn program areas) A21 to A2n. The CH1 to CHn program areas A21 to A2n have a one-to-one correspondence with the CH1 to CHn loads 61 to 6n to be controlled. Then, the storage contents used for controlling each of these CH1 to CHn loads 61 to 6n are stored in each of the CH1 to CHn program areas A21 to A2n. In the present embodiment, each CH program area stores an input determination control program, a base application control program, an output determination control program, and variables and setting values corresponding to each program.

The input determination control program is a program for executing communication via the I / F 11 and input determination processing of the input via the input circuit 12. The base application control program is a program for executing the load ON / OFF determination process according to the result of the input determination process. Further, the output determination control program is a program for executing the output determination process according to the result of the load ON / OFF determination process.

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 CH1 to CHn program areas A21 to A2n is the area for writing the rewrite data.

Further, in the present embodiment, the plurality of ECUs 10 are devices equivalent to each other including the above-mentioned memory structure of the flash ROM 14B. As a result, the rewriting device 20 transmits the rewriting data to all the ECUs 10 without particularly distinguishing the plurality of ECUs 10, as will be described later.

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. Further, FIG. 4 is a flowchart showing the mask setting process shown in FIG.

Here, in the present embodiment, as a preparatory step for the rewriting process prior to the process represented by the flowcharts of FIGS. 3 and 4, the operator first operates CH1 to CHn local SW51 to 5n of each of the plurality of ECUs 10. .. By this operation, in the CH1 to CHn program areas A21 to A2n in the flash ROM 14B of each ECU 10, a mask target area where rewriting is prohibited and a mask exclusion area where rewriting is permitted are designated. When the local switch is set to ON, the corresponding CH program area is designated as the mask target area. On the contrary, when the local switch is set to OFF, the corresponding CH program area is designated as the mask exclusion area. When all of CH1 to CHn local SW51 to 5n are set to ON, the ECU 10 itself is masked and excluded from the rewriting target.

After passing through such a preparatory step, in the process represented by the flowcharts of FIGS. 3 and 4, the operator first connects the rewriting device 20 to the connection portion 40 provided in the communication line 30 (step 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. First, at the beginning of the start, the rewriting device 20 transmits a rewriting signal to each ECU 10 to notify the start of the rewriting process.

On the other hand, the CPU 14A of each ECU 10 (hereinafter, simply abbreviated as ECU 10) starts processing according to the power supply. First, each ECU 10 executes the mask setting process described below (step S21).

In the mask setting process shown in FIG. 4, the ECU 10 first determines whether or not the rewriting condition is satisfied (step S211). This determination is made based on whether or not a rewriting signal has been transmitted from the rewriting device 20. When the rewrite signal has been transmitted (Y in step S211), the ECU 10 executes a series of mask setting processes. On the other hand, if the rewrite signal has not been transmitted (N in step S211), the ECU 10 starts the normal process (step S212) and ends the process. The normal operation referred to here is ON / OFF control for CH1 to CHn loads 61 to 6n.

The determination of the establishment of the rewriting condition is not limited to the determination made based on the rewriting signal from the rewriting device 20 as in the present embodiment. The determination of the establishment of the rewriting condition may be performed based on, for example, a local signal from the outside of the ECU 10, or may be performed based on an operation on a dedicated switch provided in the ECU 10.

In a series of mask setting processes, the ECU 10 determines whether or not the CHx (x is any of 1 to n) local switch 5x is set to ON (step S213). When the CHx local switch 5x is set to ON (Y in step S213), the ECU 10 sets the corresponding CHx program area A2x to the masked area for which rewriting is prohibited (step S214). On the other hand, when the CHx local switch 5x is set to OFF (N in step S213), the ECU 10 sets the corresponding CHx program area A2x to the mask exclusion area that allows rewriting (step S215). After that, the ECU 10 determines whether or not the processing has been completed for all of the CH1 to CHn program areas A21 to A2n (step S216). When there is an unprocessed program area (N in step S216), the ECU 10 repeats the processes of steps S213 to S215. On the other hand, when the processing for all the program areas is completed (Y in step S216), the ECU 10 finishes the mask setting processing and returns to the flowchart shown in FIG. In the ECU 10, the CPU 14A that executes the process shown in FIG. 4 plays the role of a mask setting unit that performs the mask setting process.

In the process represented by the flowchart of FIG. 3, the rewriting device 20 determines whether or not a process stop signal described later is received from any of the plurality of ECUs 10 (step S12). When the processing stop signal is received (Y in step S12), the rewriting device 20 cancels the rewriting processing (step S13) and ends the processing. On the other hand, when the processing stop signal is not received (N in step S12), the rewriting device 20 transmits CHx rewriting data to all the ECUs 10 (step S14). The rewriting data transmitted at this time is various programs, various variables, and various setting values stored in the CHx program area A2x. Each time one rewrite data is transmitted in step S14, the rewrite device 20 determines whether or not the transmission of all the rewrite data related to the CHx program area A2x is completed (step S15). When there is untransmitted rewriting data (N in step S15), the rewriting device 20 repeats the processes of steps S12 to S14. When the transmission of all the rewriting data is completed (Y in step S15), the rewriting device 20 determines whether or not the transmission of the rewriting data is completed for all of the CH1 to CHn program areas A21 to A2n (step S16). .. When there is rewriting data in the program area that has not been transmitted (N in step S16), the rewriting device 20 repeats the processes of steps S12 to S15. When the transmission of the rewriting data for all the program areas is completed (Y in step S16), the rewriting device 20 transmits the processing end signal to all the ECUs 10 (step S17), and ends the processing. Through the above processing, the rewriting device 20 sequentially transmits rewriting data for all of CH1 to CHn program areas A21 to A2n to all ECUs 10 in the order of CH1 → CH2 → ... CHn.

On the other hand, after the mask setting process (step S21) described above, the ECU 10 determines whether or not CHx rewriting data has been received from the rewriting device 20 within a predetermined time (step S22). If the CHx rewrite data is not received even after the predetermined time has elapsed (N in step S22), the ECU 10 transmits a processing stop signal to the rewriting device 20 (step S23), and ends the processing. On the other hand, when the CHx rewriting data is received (Y in step S22), the ECU 10 determines whether or not the corresponding CHx program area A2x is a mask exclusion area where rewriting is permitted (step S24). When the CHx program area A2x is a masked area for which rewriting is prohibited (N in step S24), the ECU 10 determines whether or not a processing end signal has been received from the rewriting device 20 (step S25). When the process end signal is received (Y in step S25), the ECU 10 ends the process. When the processing end signal is not received (N in step S25), the ECU 10 returns the processing to step S22 to prepare for receiving the rewrite data for the next CH program area.

On the other hand, when it is determined in step S24 that the CHx program area A2x is the mask exclusion area (Y in step S24), the ECU 10 erases the stored contents of the CHx program area A2x (step S26). Next, the ECU 10 determines whether or not the erasure of the stored contents is successful (step S27). In step S27, the ECU 10 reads the stored contents of the CHx program area A2x, and determines that the erasure is successful if 1 is written and that the erasure is unsuccessful if 0 is written. If this erasure is not successful (N in step S27), the ECU 10 transmits a processing stop signal to the rewriting device 20 (step S23), and ends the processing. When the erasing is successful (Y in step S27), the ECU 10 rewrites the data by writing the CHx rewriting data received from the rewriting device 20 to the CHx program area A2x (step S28). Next, the ECU 10 determines whether or not the rewriting is successful (step S29). In this determination, the ECU 10 first reads the stored contents of the CHx program area A2x. Subsequently, the ECU 10 determines that the rewriting is successful if the read stored content is the same as the received CHx rewriting data, and that the rewriting is unsuccessful if it is different. If the rewriting is not successful (N in step S29), the ECU 10 transmits a processing stop signal to the rewriting device 20 (step S23), and ends the processing. When the rewriting is successful (Y in step S29), the ECU 10 determines whether or not the processing end signal is received (step S25), ends the processing, or returns to the processing in step S22 and returns to the next rewriting data. Prepare for reception.

As described above, the processing end signal is transmitted from the rewriting device 20 when the transmission of the rewriting data for all of the CH1 to CHn program areas A21 to A2n is completed. That is, when it is determined in step S25 that the processing end signal has been received, it means that the rewriting of the stored contents has been completed for all the mask exclusion areas among all the program areas. Therefore, when it is determined in step S25 that the processing end signal has been received, the ECU 10 ends the processing. After that, if there is no new reception of the rewriting signal from the rewriting device 20, the ECU 10 starts the normal processing. Then, when a new rewrite signal is received, the ECU 10 executes the rewrite process again from the mask setting process S21.

According to the present embodiment described above, rewriting of an arbitrary program area can be prohibited or permitted in the mask setting process. Therefore, for example, all of CH1 to CHn program areas A21 to A2n can be rewritten at once, only a desired program area can be rewritten, and flexible rewriting can be performed.

On the other hand, the rewriting device 20 does not need to know which channel area is prohibited or permitted to be rewritten, and simply rewrites the rewriting data for all of the CH1 to CHn program areas A21 to A2n. All you have to do is send it. Further, each ECU 10 simply receives the rewriting data and rewrites only the mask exclusion area for which rewriting is permitted in the mask setting process. As described above, according to the present embodiment, the rewriting time can be shortened because the processing required for rewriting is simple. Moreover, since the processing required for rewriting is simple, it is possible to reduce rewriting errors.

Here, in the present embodiment, the mask setting process is performed by the ECU 10 having CH1 to CHn program areas A21 to A2n. Thereby, for example, the mask setting process can be performed with higher accuracy than the configuration in which the mask setting process is performed while communicating with each ECU 10 in the rewriting device 20.

Further, in each ECU 10, the mask target area and the mask exclusion area are grasped based on the hardware state of the CH1 to CHn local SW51 to 5n ON / OFF state, so that the mask setting process is performed with higher accuracy. Can be done.

Then, in the present embodiment, CH1 to CHn local SW51 to 5n have a one-to-one correspondence with CH1 to CHn program areas A21 to A2n. That is, the ON / OFF state of each local SW is directly linked to whether each CH program area is a mask target area or a mask exclusion area. Therefore, the mask setting process can be performed with higher accuracy.

Further, in the present embodiment, the rewriting system 1 is provided with a plurality of ECUs 10. The mask setting process is performed individually in each ECU 10, and the rewriting device 20 commonly transmits rewriting data of all the stored contents of CH1 to CHn program areas A21 to A2n to all of the plurality of ECUs 10. That is, the rewriting device 20 simply transmits all the rewriting data of the CH1 to CHn program areas A21 to A2n without distinguishing between the plurality of ECUs 10. Therefore, even in the rewriting system 1 for a plurality of ECUs 10, the rewriting time can be 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 within a range that does not deviate 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, as an example of the memory according to the present invention, a flash ROM 14B including a rewrite target area A1 and a rewrite target area A2 is exemplified. Further, as an example of the plurality of channel areas referred to in the present invention, an input determination control program, a base application control program, an output determination control program, and CH1 to CHn program areas A21 to A2n in which variables and setting values are stored are exemplified. ing. However, the memory and the plurality of channel areas referred to in the present invention are not limited to these. The specific storage contents in each channel area may be arbitrarily set, and if the channel area has a plurality of channel areas, the specific area configuration of the memory may be arbitrarily set.

Further, in the above-described embodiment, as an example of the rewriting system according to the present invention, the rewriting system 1 including a plurality of ECUs 10 is exemplified. However, the rewriting system referred to in the present invention is not limited to this, and may be a system including only one computer such as an ECU.

Further, in the above-described embodiment, as an example of the mask setting unit according to the present invention, a mode including a CPU 14A of the ECU 10 and CH1 to CHn local SW51 to 5n provided in the ECU 10 is exemplified. However, the mask setting unit referred to in the present invention is not limited to this form, and may be, for example, one provided in a rewriting device and performing mask setting processing to a computer such as an ECU via communication. Further, a part of the processing function of the mask setting process may be provided in each of the computer and the writing device, and the mask setting process may be performed in cooperation with each other. Alternatively, the device may be provided in an external device different from the rewriting device and connected to a computer such as an ECU to perform mask setting processing.

Further, the mask setting unit referred to in the present invention is provided with CH1 to CHn local SW51 to 5n provided one-to-one with CH1 to CHn program areas A21 to A2n even if it is provided in a computer such as an ECU. It is not limited. The mask setting unit referred to in the present invention is provided with, for example, a small number of local switches, and a form of grasping which area is to be a mask target area and a mask exclusion area is determined by a combination of ON / OFF states in those local switches. And so on. Alternatively, without providing a local switch in the first place, for example, analog data may be input to a computer such as an ECU to specify which area should be the mask target area and the mask exclusion area depending on the level. ..

1 Rewriting system 10 ECU (computer)
14A CPU (part of mask setting part)
14B flash ROM (memory)
20 Rewriting device 51 to 5n CH1 to CHn Local SW (part of mask setting part)
61 to 6n CH1 to CHn load A1 Rewrite target area A2 Rewrite target area A21 to A2n CH1 to CHn Program area (channel area)

Claims (6)

A rewriting system including a computer that controls a plurality of control targets and has a memory, and a rewriting device capable of transmitting rewriting data of stored contents stored in the memory to the plurality of computers. ,
The memory in the computer is provided with a plurality of channel areas in which the storage contents used for the control of the plurality of control targets are stored in each of the plurality of control targets.
A mask setting unit for performing a mask setting process for setting a mask target area for which rewriting is prohibited and a mask exclusion area for which rewriting is permitted among the plurality of channel areas is provided.
The rewriting device transmits rewriting data of stored contents for all of the plurality of channel areas.
The computer is a rewriting system characterized in that, among the rewriting data transmitted from the rewriting device, the rewriting data corresponding to the mask exclusion area is used to rewrite the stored contents of the mask exclusion area. The rewriting system according to claim 1, wherein the mask setting unit is provided in the computer to perform the mask setting process. The mask setting unit has a plurality of local switches provided in the computer, and depending on the ON / OFF state of the plurality of local switches, each of the plurality of channel areas has the mask target area and the mask exclusion. The rewriting system according to claim 2, wherein it is possible to grasp which of the areas is used. The rewriting system according to claim 3, wherein the plurality of local switches correspond to the plurality of channel areas. A plurality of the computers are provided.
The mask setting unit individually performs the mask setting process for each computer.
Any of claims 1 to 4, wherein the rewriting device transmits rewriting data of all the stored contents of the plurality of channel areas in common to all of the plurality of computers. The rewriting system described in paragraph 1. A computer that controls a plurality of control targets, has a memory, and receives rewriting data of the stored contents of the memory from a rewriting device.
The memory is provided with a plurality of channel areas in which the storage contents used for the control of the plurality of control targets are stored in each of the plurality of control targets.
The plurality of channel areas are subjected to a mask setting process for setting a mask target area for which rewriting is prohibited and a mask exclusion area for which rewriting is permitted.
Among the rewriting data transmitted from the rewriting device for all of the plurality of channel areas, the rewriting data corresponding to the mask exclusion area is used to rewrite the stored contents of the mask exclusion area. Computer.

Images