CN108334282A - Method and device for downloading program file of automobile electronic control unit - Google Patents

Abstract

The invention provides a method and device for downloading a program file of an automobile electronic control unit, and relates to the field of electronics and electricity. The program file downloading method of the automotive electronic control unit includes: obtaining the mapping relationship between the vehicle-mounted program file and the unit storage block in the flash memory of the automotive electronic control unit; downloading the vehicle-mounted program file to the unit storage block in the flash memory of the automotive electronic control unit; Obtain the interrupt write unit storage block, the interrupt write unit storage block is the unit storage block being written when the download process of the vehicle program file is interrupted; based on the interrupt write unit storage block and the mapping relationship, it is obtained that the vehicle program file needs to continue downloading the data part; download the data part that needs to be downloaded continuously in the vehicle program file to the unit storage block in the flash memory of the vehicle electronic control unit. Adopting the technical solution in the embodiment of the present invention can reduce the time spent on downloading the vehicle program file in case of interruption.

Description

Method and device for downloading program files of automotive electronic control unit

technical field

The invention relates to the field of electronics and electricity, in particular to a method and device for downloading program files of an automotive electronic control unit.

Background technique

Electronic Control Units (Electronic Control Units, ECUs) are widely used in vehicles. The electronic control unit can perform calculations according to the collected parameter information in combination with the program stored in the electronic control unit. The result of the calculation is converted into a control signal, so as to realize the overall control of the vehicle by the electronic control unit.

In order to meet the various requirements of users for vehicle control functions, the electronic control unit needs to download various programs. During the process of downloading program files, abnormal situations such as power failure or message loss may occur. If the above-mentioned abnormal situation occurs, the download of the program file will be affected, and the downloaded program file may be incomplete or have errors, resulting in the failure of the program file to run, and the function generated by the operation of the program file cannot be realized. The entire program file needs to be downloaded again. For example: if the size of the program file is 1MB, use the controller area network (Controller Area Network, CAN) bus to transmit the message, set to receive a frame of message every 10 milliseconds, then download all the program files with the size of 1MB It takes about 50 minutes to 60 minutes. It takes a long time to re-download the entire program file. Moreover, if multiple abnormal situations occur, the entire program file needs to be re-downloaded multiple times. Increased the time it takes for program files to download.

Contents of the invention

Embodiments of the present invention provide a method and device for downloading a program file of an automotive electronic control unit, which can reduce the time spent on downloading a vehicle program file when an interruption occurs.

In the first aspect, an embodiment of the present invention provides a method for downloading a program file of an automotive electronic control unit, comprising: obtaining the mapping relationship between the vehicle-mounted program file and the unit storage block in the flash memory of the automotive electronic control unit; downloading the vehicle-mounted program file to the vehicle The unit storage block in the flash memory of the electronic control unit; obtain the interrupt write unit storage block, the interrupt write unit storage block is the unit storage block being written when the vehicle program file download process is interrupted; write the unit storage block based on the interrupt and The mapping relationship obtains the data part that needs to be continuously downloaded in the vehicle program file; and downloads the data part that needs to be continuously downloaded in the vehicle program file to the unit storage block in the flash memory of the vehicle electronic control unit.

In a second aspect, an embodiment of the present invention provides a program file downloading device for an automotive electronic control unit, including: a mapping acquisition module configured to acquire a mapping relationship between an on-vehicle program file and a unit storage block in the flash memory of the automotive electronic control unit ; The download module is configured to download the vehicle program file to the unit storage block in the flash memory of the automotive electronic control unit; the interrupt acquisition module is configured to obtain the interrupt write unit storage block, and the interrupt write unit storage block is the vehicle program file download The unit storage block being written when the process is interrupted; the search module is configured to obtain the data part that needs to be downloaded continuously in the vehicle program file based on the interrupt write unit storage block and the mapping relationship; the download module is also configured to convert the vehicle program The part of the data that needs to be downloaded in the file is downloaded to the unit storage block in the flash memory of the automotive electronic control unit.

Embodiments of the present invention provide a method and device for downloading program files of an automotive electronic control unit. When the downloading of the vehicle program file to the vehicle electronic control unit is interrupted, the interrupt write unit storage block can be obtained, and the vehicle program file can be downloaded according to the mapping relationship between the vehicle program file and the unit storage block in the memory of the vehicle electronic control unit. The part of the data that needs to continue to be downloaded because of the interruption. In the embodiment of the present invention, the data part of the vehicle program file that is not effectively downloaded to the vehicle electronic control unit during the download process of the vehicle program file can be re-downloaded to the vehicle electronic control unit. In this way, it is avoided that the downloading of the vehicle-mounted program file is interrupted, and the process of downloading and flashing the entire vehicle-mounted program file is carried out. Further, the time spent on downloading the vehicle program file in the case of interruption is reduced.

Description of drawings

The present invention can be better understood from the following description of specific embodiments of the present invention in conjunction with the accompanying drawings, wherein the same or similar reference numerals represent the same or similar features.

Fig. 1 is a kind of program file downloading method of automobile electronic control unit provided by an embodiment of the present invention;

2 is a schematic diagram of division of unit storage blocks in a flash memory of an automotive electronic control unit in an embodiment of the present invention;

Fig. 3 is the flow chart of the program file downloading method of automobile electronic control unit in another embodiment of the present invention;

Fig. 4 is the flow chart of the program file downloading method of automobile electronic control unit in another embodiment of the present invention;

5 is a flowchart of a method for downloading a program file of an automotive electronic control unit in another embodiment of the present invention;

6 is a schematic structural diagram of a program file downloading device for an automotive electronic control unit in an embodiment of the present invention;

7 is a schematic structural diagram of a program file downloading device for an automotive electronic control unit in another embodiment of the present invention;

8 is a schematic structural diagram of a program file downloading device for an automotive electronic control unit in another embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a program file downloading device for an automotive electronic control unit in yet another embodiment of the present invention.

Detailed ways

Features and exemplary embodiments of various aspects of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention. The present invention is by no means limited to any specific configurations and algorithms presented below, but covers any modification, substitution and improvement of elements, components and algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the present invention.

An embodiment of the present invention provides a method for downloading a program file of an automotive electronic control unit. In one example, it can be applied to a scenario where an electronic control unit (Electronic Control Unit, ECU) in a car downloads a car program file from a remote server through a car terminal. Or, it is applied to a scenario where a vehicle-mounted terminal with a vehicle electronic control unit downloads a vehicle-mounted program file from a remote server. Wherein, the vehicle terminal and the remote server can be connected through wireless communication. For example, the vehicle-mounted terminal communicates with the remote server through wireless communication technologies such as a data network, Wireless Fidelity (Wi-Fi), Bluetooth, or Zigbee to realize data transmission. The vehicle-mounted terminal and the vehicle electronic control unit can realize data transmission through wired communication or wireless communication.

In another example, the method and device for downloading vehicle-mounted program files provided by the embodiments of the present invention can also be applied to a wired connection between a hardware device carrying a vehicle-mounted program file and a vehicle-mounted terminal, to transmit the vehicle-mounted program file to the vehicle-mounted terminal, and to download the vehicle-mounted program file The file is downloaded from the vehicle terminal to the vehicle electronic control unit. The vehicle-mounted terminal and the vehicle electronic control unit can realize data transmission through wired communication or wireless communication.

Fig. 1 is a method for downloading a program file of an electronic control unit of an automobile provided by an embodiment of the present invention. As shown in Figure 1, the program file downloading method of automobile electronic control unit comprises step 101 to step 105

In step 101, the mapping relationship between the vehicle program file and the unit storage block in the flash memory of the vehicle electronic control unit is obtained.

On-board program files in the car's electronic control unit are stored in flash memory. Before downloading the vehicle program file, the unit storage block in the flash memory of the vehicle electronic control unit can be obtained first, and the corresponding relationship between the vehicle program file and the unit storage block can be obtained according to the size of the vehicle program file. Vehicle-mounted program files of different sizes occupy different numbers of unit storage blocks. According to the corresponding relationship between the on-vehicle program file and the unit storage block, which part of the on-vehicle program file is stored in each unit storage block can be obtained.

In one example, the unit storage block may be the minimum erase/write unit of the flash memory of the automotive electronic control unit. In another example, the unit storage block may also be an integer multiple of the minimum erasable unit of the flash memory of the automotive electronic control unit.

In an example, the vehicle program file may be a program file of a control application newly downloaded by the vehicle, or an update program file of an existing control application of the vehicle. In terms of form, the vehicle program file can be an s19 file or a hex file.

In step 102, download the vehicle program file to the unit storage block in the flash memory of the vehicle electronic control unit.

In one example, if the vehicle program file is relatively small, the entire vehicle program file can be directly downloaded to a unit storage block in the flash memory of the vehicle electronic control unit.

In another example, if the vehicle-mounted program file is large, the vehicle-mounted program file can be divided into multiple data packages, and the multiple data packages are sequentially downloaded to the unit storage block in the memory of the vehicle electronic control unit.

In one example, the vehicle-mounted program file can be downloaded to the unit storage block in the flash memory of the electronic control unit of the vehicle by using wireless transmission technology, and professional operators are not required to connect the hardware device carrying the vehicle-mounted program file with the interface of the vehicle, so as to Improve the efficiency of downloading in-vehicle program files. In the above embodiment, downloading the vehicle-mounted program file to the unit storage block in the flash memory of the vehicle electronic control unit can be specifically implemented as downloading the vehicle-mounted program from the remote server to the unit storage block in the flash memory of the vehicle electronic control unit through the vehicle-mounted terminal. That is to say, the vehicle-mounted terminal can download the vehicle-mounted program file from the remote server, and the vehicle electronic control unit can download the vehicle-mounted program file from the vehicle-mounted terminal. For example, the automotive electronic control unit can communicate with the vehicle terminal through download protocols such as Unified Diagnostic Service (UDS) or Universal Measurement and Calibration Protocol (XCP, Universal Measurement and Calibration Protocol).

In an example, the vehicle program file may also be an encrypted vehicle program file.

In step 103, the interrupt write unit storage block is obtained.

Interruptions may occur during the download of on-board program files to the unit memory module in the flash memory of the vehicle electronic control unit. For example, the power supply of the electronic control unit of the vehicle is powered off, or the message carrying the program file on the vehicle received by the electronic control unit of the vehicle is lost, which will cause the interruption of the downloading process. When the download process is interrupted, the vehicle electronic control unit may have downloaded part of the vehicle program file, and the interrupted writing unit storage block is the unit storage block being written when the vehicle program file download process is interrupted. Acquiring the unit storage block being written when the downloading process of the vehicle program file is interrupted, so that the subsequent downloading can be continued by writing the unit storage block according to the interruption.

In step 104, based on the interrupt write unit storage block and the mapping relationship, the data part in the vehicle program file that needs to be downloaded continuously is obtained.

In step 101, the mapping relationship between the vehicle-mounted program file and the unit storage block in the flash memory of the automotive electronic control unit can be obtained, so the vehicle-mounted program file corresponding to the interrupt write unit storage block in the mapping relationship can be found according to the mapping relationship the data portion of the . The data portion of the on-vehicle program file corresponding to the interrupted write unit storage block, and the unit storage block after the interrupted write unit storage block may be the data portion in the on-vehicle program file that needs to be continuously downloaded.

In step 105, the data part in the vehicle program file that needs to be downloaded continuously is downloaded to the unit storage block in the flash memory of the vehicle electronic control unit.

For example, FIG. 2 is a schematic diagram of division of unit storage blocks in a flash memory of an automotive electronic control unit in an embodiment of the present invention. As shown in Figure 2, the flash memory of the automotive electronic control unit is divided into five unit storage blocks, which are unit storage block 1, unit storage block 2, unit storage block 3, unit storage block 4 and unit storage block 5. Each unit memory block can be regarded as a partition of flash memory. The vehicle program file corresponds to the unit storage block, and can be divided into data part 1, data part 2, data part 3, data part 4 and data part 5. Data part 1 to data part 5 can be combined into an entire vehicle program file. Wherein, the data part 1 corresponds to the unit storage block 1, the data part 2 corresponds to the unit storage block 2, the data part 3 corresponds to the unit storage block 3, the data part 4 corresponds to the unit storage block 4, and the data part 5 corresponds to the unit storage block 5 correspond. If the downloading process is interrupted, the interrupted writing unit storage block is the unit storage block 4, then the data part 4 and the data part 5 need to continue downloading.

In the embodiment of the present invention, the data part of the vehicle program file that is not effectively downloaded to the vehicle electronic control unit during the download process of the vehicle program file can be re-downloaded to the vehicle electronic control unit. In this way, it is avoided that the downloading of the vehicle-mounted program file is interrupted, and the process of downloading and flashing the entire vehicle-mounted program file is carried out. Further, the time spent on downloading the vehicle program file in the case of interruption is reduced.

FIG. 3 is a flow chart of a method for downloading program files of an automotive electronic control unit in another embodiment of the present invention. The difference between Fig. 3 and Fig. 1 is that step 104 in Fig. 1 can be specifically refined as step 1041 and step 1042 in Fig. 3, and step 105 in Fig. 1 can be specifically refined as step 1051 and step 1042 in Fig. 3 Step 1052 , the method for downloading the program file of the vehicle electronic control unit in FIG. 3 may also include step 106 .

In step 1041, based on the interrupt write unit storage block, the data part of the vehicle program file corresponding to the start address of the interrupt write unit storage block is searched in the mapping relationship.

In one example, the mapping relationship in the above embodiment may include the corresponding relationship between each data part of the vehicle program file and the start address of each unit storage block in the flash memory of the vehicle electronic control unit. If it is known that the storage block of the writing unit is interrupted, the data part that needs to be downloaded continuously can be determined according to the mapping relationship.

The identifier can be preset for the unit storage block, so that different unit storage blocks have different identifiers for easy recording and searching. The identifier of the unit storage block may be a serial number, or may be the starting address of the unit storage block.

In step 1042, the data portion of the on-vehicle program file corresponding to the start address of the interrupt write unit storage block and the subsequent data portion are taken as the data portion of the on-vehicle program file that needs to be downloaded continuously.

The data portion of the vehicle program file corresponding to the start address of the interrupt writing unit storage block may have been written into the interrupt write unit storage block, but not completely written. The data that has been written into the storage block of the interrupted writing unit also belongs to the data part that needs to be downloaded continuously. The data portion of the on-vehicle program file corresponding to the start address of the interruption writing unit storage block and the subsequent data portion are taken as the data portion that needs to be downloaded continuously.

In step 1051, the interrupt write unit storage block is erased.

Since the writing of the interrupted unit storage block has not been completed, and the unit storage block may be the smallest erasing unit of the flash memory in the automotive electronic control unit. Erase the interrupted write unit storage block to prevent data confusion when the data that needs to be downloaded continuously is written into the unit storage block.

In step 1052, the data part in the on-vehicle program file that needs to be downloaded continuously is downloaded to the interrupted writing unit storage block and the unit storage block after the interrupted writing unit storage block.

The data part of the on-vehicle program file that needs to be continuously downloaded includes the data part of the on-vehicle program file corresponding to the start address of the interrupted writing unit storage block and the subsequent data part. The data portion of the vehicle program file corresponding to the start address of the interrupt write unit storage block is written into the interrupt write unit storage block, and the data after the data portion of the vehicle program file corresponding to the start address of the interrupt write unit storage block The parts also respectively correspond to the unit memory blocks after the writing interruption to the unit memory blocks.

In step 106, when the vehicle program file is downloaded to the unit storage block in the flash memory of the vehicle electronic control unit, it is recorded that the unit storage block has been written.

In order to obtain the interrupt write unit storage block faster, when the vehicle program file is downloaded to the unit storage block in the flash memory of the vehicle electronic control unit, it is possible to record the written unit storage block. When acquiring the interrupt write unit storage block, the latest recorded written unit storage block may be used as the interrupt write unit storage block.

In one example, each unit memory block can be located in the program download area in the flash memory of the automotive electronic control unit. Because the downloaded vehicle program file may be wrong during the transmission process, the downloaded vehicle program file is incomplete or has errors. Therefore, after the in-vehicle program file is downloaded, the in-vehicle program file can be checked for completeness and accuracy. The downloaded on-board program file cannot be written into the flash memory of the vehicle electronic control unit immediately. The program download area can be set in the flash memory of the automotive electronic control unit, so that the program download area is independent from the part of the running program file in the flash memory of the automotive electronic control unit. The check of the vehicle program file can be carried out in the program download area.

In one example, the interrupted write unit storage block can also be detected, and if the interrupted write unit storage block is the first unit storage block in the flash memory of the automotive electronic control unit, the entire vehicle program file is downloaded to the automotive electronic control unit. A unit memory block in the unit's flash memory.

If the interrupt write unit storage block arranges the first storage block in the flash memory of the automotive electronic control unit, then the data part of the vehicle-mounted program file corresponding to the interrupt write unit storage block and the subsequent data part are correspondingly written into the interrupt write The unit memory block and the unit memory block after interrupt writing the unit memory block.

Fig. 4 is a flow chart of a method for downloading program files of an automotive electronic control unit in another embodiment of the present invention. The difference between FIG. 4 and FIG. 1 is that the method for downloading the program file of the automotive electronic control unit shown in FIG. 4 may further include steps 107 to 110 .

In step 107, during the process of downloading the vehicle program file to the vehicle electronic control unit, the vehicle program file downloaded to the vehicle electronic control unit is read back.

Wherein, the vehicle program file includes a cyclic redundancy check code (Cyclic Redundancy Check, CRC). The cyclic redundancy check code included in the vehicle program file is the cyclic redundancy check code of the vehicle program file before transmission. For example, the cyclic redundancy check code can be placed in the header information of the vehicle program file. In the process of downloading the vehicle program file, the cyclic redundancy check code can be downloaded to the first unit memory block in the flash memory of the vehicle electronic control unit.

The cyclic redundancy check code is mainly used to detect or verify errors that may occur after data transmission or storage. In order to avoid incomplete or inaccurate downloaded vehicle program files, a cyclic redundancy check may be performed on the downloaded vehicle program files.

In step 108, a cyclic redundancy check code for verification is generated according to the read-back vehicle program file downloaded to the vehicle electronic control unit.

In the process of downloading the on-board program file to the storage block of the flash memory of the automotive electronic control unit, the data of the downloaded on-board program file is continuously read back, and the cycle of the read-back on-board program file is calculated according to the read-back on-board program file Redundancy check code, that is, a cyclic check code for verification.

In step 109, if the checking cyclic redundancy check code is inconsistent with the cyclic redundancy check code included in the vehicle program file, re-download the vehicle program file.

If the cyclic redundancy check code used for verification is inconsistent with the cyclic redundancy check code included in the vehicle program file, it means that the downloaded vehicle program file is inconsistent with the vehicle program file before transmission. That is to say, the downloaded vehicle program file is incomplete and/or inaccurate.

If it is determined that the downloaded vehicle program file is incomplete and/or inaccurate, it is necessary to re-download the vehicle program file to the unit storage block in the flash memory of the vehicle electronic control unit. Moreover, the downloaded vehicle program file is not written into the program running area in the flash memory of the vehicle electronic control unit. Incomplete and/or inaccurately downloaded in-vehicle program files can also be directly deleted.

In step 110, if the cyclic redundancy check code for verification is consistent with the cyclic redundancy check code included in the vehicle program file, write the vehicle program file downloaded in the program download area into the flash memory of the vehicle electronic control unit program execution area.

If the cyclic redundancy check code used for verification is consistent with the cyclic redundancy check code included in the vehicle program file, it means that the downloaded vehicle program file is consistent with the vehicle program file before transmission. That is to say, the downloaded vehicle program file is complete and accurate.

The flash memory of the automotive electronic control unit may include a program download area and a program running area, and the program download area and the program running area are two independent areas. Wherein, the program running area runs the program files currently used by the car. If it is determined that the downloaded vehicle program file is complete and accurate, the downloaded vehicle program file may be written into the program running area.

In an example, if the vehicle-mounted program file is an update program file, etc., it needs to occupy a part of the program running area where the program file has been written. Then the program files running in the program running area can be erased, and then the downloaded vehicle program files can be written into the program running area. When the vehicle needs to run the downloaded vehicle program file, the downloaded vehicle program file can be run in the program running area.

In the embodiment of the present invention, if the downloaded vehicle-mounted program file is complete and accurate, the downloaded vehicle-mounted program file is put into use, so that the downloaded vehicle-mounted program file is run in the vehicle. Avoid running incomplete and/or inaccurate vehicle-mounted program files in the vehicle, and avoid the risk of the vehicle due to the operation of wrong vehicle-mounted program files, thereby improving the safety of vehicle control.

FIG. 5 is a flow chart of a method for downloading program files of an automotive electronic control unit in another embodiment of the present invention. The difference between FIG. 5 and FIG. 1 is that the method for downloading the program file of the automotive electronic control unit shown in FIG. 5 may further include steps 111 to 114 .

In step 111, the download status flag is set.

The download status identification bit can indicate the download status of the vehicle program file. The download status of the vehicle-mounted program file can be distinguished by using different identifications on the download status identification bit. In one example, the download status of the vehicle program file may include a downloading status and a downloading status. The identification on the vehicle status identification bit can be characters such as numbers, letters, special characters, or a string of one type of characters, or a string of multiple characters, which is not limited here. For example, if the flag on the download status flag is 0, it means that it is in the downloading state; if the flag on the download state flag is 1, then the flag is in the downloading state.

In step 112, if the download status flag is the first flag, write the vehicle program file downloaded in the program download area into the program running area in the flash memory of the vehicle electronic control unit.

If the download status flag is the first flag, it means that the in-vehicle program file has been downloaded. The downloaded vehicle program file can be written into the program running area in the flash memory of the vehicle electronic control unit.

In one example, if the vehicle-mounted program file is a part of the program running area that needs to occupy the program running area that has been written into the program file, etc., the program file in the program running area can be erased, and then the vehicle-mounted program file can be written into the program running area .

In step 113, if the download status flag is the second flag, a prompt message indicating that the download of the vehicle program file in the program download area is successful is sent.

If the download status flag is the second flag, it means that the vehicle program file has been downloaded successfully. However, the vehicle-mounted program files in the program download area are not written into the program running area immediately. Instead, a prompt message prompting the user is issued.

In an example, the second identifier in this embodiment of the present invention may be the same as or different from the first identifier in the foregoing embodiment.

In an example, a third flag, a fourth flag, etc. may also be set to represent other download states, and other control processes may be generated in conjunction.

The prompt message may be a display of an image or a text, or may be a voice content, which is not limited here.

In step 114, a control instruction sent by the user is received, and according to the control instruction, it is determined whether to write the vehicle program file downloaded in the program download area into the program running area.

After the user checks or listens to the prompt message, he can issue a control command, and the program file downloading device of the automotive electronic control unit receives the control command. The control instruction indicates whether to write the vehicle program file downloaded in the program download area into the program running area. If the control instruction instructs to write the vehicle program file downloaded in the program download area into the program running area, write the vehicle program file downloaded in the program download area into the program running area. If the control instruction indicates not to write the vehicle program file downloaded in the program download area into the program running area, then the vehicle program file downloaded in the program download area will not be written into the program running area.

For example, the vehicle program file is an update program file. When the update program file is successfully downloaded to the program download area, a prompt message "update program file has been successfully downloaded, please update immediately" can be issued. The user issues a control command indicating "update immediately" or "not update temporarily". The program file downloading device of the automotive electronic control unit receives the control instruction. If the control command indicates "immediately update", the vehicle-mounted program file downloaded in the program download area is written into the program running area. If the control instruction indicates "don't update temporarily", the vehicle program file downloaded in the program download area will not be written into the program running area.

FIG. 6 is a schematic structural diagram of a program file downloading device 200 for an automotive electronic control unit in an embodiment of the present invention. As shown in FIG. 6 , the program file downloading device 200 for an automotive electronic control unit includes a map acquisition module 201 , a download module 202 , an interrupt acquisition module 203 and a search module 204 .

The mapping obtaining module 201 is configured to obtain the mapping relationship between the vehicle program file and the unit storage block in the flash memory of the vehicle electronic control unit.

The download module 202 is configured to download the vehicle program file to the unit storage block in the flash memory of the vehicle electronic control unit.

The interrupt acquisition module 203 is configured to acquire the interrupt write unit storage block, which is the unit storage block being written when the vehicle program file download process is interrupted.

The search module 204 is configured to obtain the data part in the vehicle program file that needs to be downloaded continuously based on the interrupt write unit storage block and the mapping relationship.

The downloading module 202 is further configured to download the data part that needs to be downloaded continuously in the vehicle program file to the unit storage block in the flash memory of the vehicle electronic control unit.

In the embodiment of the present invention, the data part of the vehicle program file that is not effectively downloaded to the vehicle electronic control unit during the download process of the vehicle program file can be re-downloaded to the vehicle electronic control unit. In this way, it is avoided that the downloading of the vehicle-mounted program file is interrupted, and the process of downloading and flashing the entire vehicle-mounted program file is carried out. Further, the time spent on downloading the vehicle program file in the case of interruption is reduced.

FIG. 7 is a schematic structural diagram of a program file downloading device 200 for an automotive electronic control unit in another embodiment of the present invention. The difference between FIG. 7 and FIG. 6 is that the download module 202 in FIG. 6 may include the erasing sub-module 2021 and the writing sub-module 2022 in FIG. 7 . The program file downloading device 200 of the vehicle electronic control unit shown in FIG. 7 may also include a recording module 205 .

The erasing sub-module 2021 is configured to erase the interrupted writing unit storage block.

The writing sub-module 2022 is configured to download the part of the data in the vehicle program file that needs to be downloaded continuously to the interrupted writing unit storage block and the unit storage block after the interrupted writing unit storage block.

The recording module 205 is configured to record the written unit storage block when the vehicle program file is downloaded to the unit storage block in the flash memory of the vehicle electronic control unit.

The above-mentioned downloading module 202 can also be configured to: when the interrupt write unit storage block is the first unit storage block in the flash memory of the automotive electronic control unit, download the entire vehicle program file to the unit storage in the flash memory of the automotive electronic control unit piece.

In one example, the mapping relationship includes the corresponding relationship between each data part of the vehicle program file and the start address of each unit storage block in the flash memory of the vehicle electronic control unit.

In an example, the search module 204 in the above-mentioned embodiment may be specifically configured to search for the data part of the on-vehicle program file corresponding to the start address of the interrupt write unit storage block in the mapping relationship based on the interrupt write unit storage block ; The data part of the vehicle-mounted program file corresponding to the starting address of the interrupt write unit storage block and the subsequent data part are used as the data part that needs to be downloaded continuously in the vehicle-mounted program file.

In one example, the unit storage block in the above embodiment is located in the program download area of the flash memory of the automotive electronic control unit.

FIG. 8 is a schematic structural diagram of a program file downloading device 200 for an automotive electronic control unit in yet another embodiment of the present invention. The difference between FIG. 8 and FIG. 6 is that the program downloading device 200 for the automotive electronic control unit shown in FIG.

The read-back module 206 is configured to read back the on-board program file downloaded to the automotive electronic control unit during the process of downloading the on-board program file to the automotive electronic control unit, and the on-board program file includes a cyclic redundancy check code;

The verification code generation module 207 is configured to generate a cyclic redundancy check code for verification according to the on-board program file downloaded to the unit storage block in the flash memory of the automotive electronic control unit obtained by reading back;

The above download module 202 is also configured to re-download the vehicle program file if the cyclic redundancy check code used for verification is inconsistent with the cyclic redundancy check code included in the vehicle program file;

The first writing module 208 is configured to write the vehicle-mounted program file downloaded in the program download area into the vehicle electronics if the cyclic redundancy check code for verification is consistent with the cyclic redundancy check code included in the vehicle-mounted program file. The program execution area in the flash memory of the control unit.

FIG. 9 is a schematic structural diagram of a program file downloading device 200 for an automotive electronic control unit in yet another embodiment of the present invention. The difference between Fig. 9 and Fig. 6 is that the program downloading device 200 of the automotive electronic control unit shown in Fig. 9 can also include a setting module 209, a second writing module 210, an erasing module 211, a sending module 212 and a receiving module 213.

The setting module 209 is configured to set the download status identification bit.

The second writing module 210 is configured to write the vehicle program file downloaded in the program download area into the program running area in the flash memory of the vehicle electronic control unit if the download status flag is the first flag.

The erasing module 211 is configured to erase program files in the program running area.

The sending module 212 is configured to send a prompt message indicating that the download of the vehicle program file in the program download area is successful if the download status flag is the second flag.

The receiving module 213 is configured to receive a control instruction sent by the user, and determine whether to write the vehicle program file downloaded in the program download area into the program running area according to the control instruction.

It should be clear that each embodiment in this specification is described in a progressive manner, and the same or similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments. place. For the device embodiment, for the related parts, refer to the description part of the method embodiment. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Those skilled in the art may make various changes, modifications and additions, or change the order between steps after appreciating the spirit of the present invention. Also, for the sake of brevity, detailed descriptions of known methods and techniques are omitted here.

The functional modules and functional sub-modules shown in the above structural block diagrams may be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an application specific integrated circuit (ASIC), suitable firmware, a plug-in, a function card, or the like. When implemented in software, the elements of the invention are the programs or code segments employed to perform the required tasks. Programs or code segments can be stored in machine-readable media, or transmitted over transmission media or communication links by data signals carried in carrier waves. "Machine-readable medium" may include any medium that can store or transmit information.

Claims (20)

1. a kind of program file method for down loading of vehicle electronic control unit, which is characterized in that including：

Obtain the mapping relations of the unit memory block in the flash memory of onboard program file and vehicle electronic control unit；

Download the unit memory block in the onboard program file to the flash memory of the vehicle electronic control unit；

It obtains and interrupts write-in unit memory block, the interruption write-in unit memory block is in the onboard program file download process The unit memory block being just written into when disconnected；

Unit memory block and the mapping relations is written based on the interruption, obtains needing to continue in the onboard program file The data portion of download；

The sudden strain of a muscle that the data portion for continuing to download will be needed to be downloaded to the vehicle electronic control unit in the onboard program file Unit memory block in depositing.

2. the program file method for down loading of vehicle electronic control unit according to claim 1, which is characterized in that described to reflect The relationship of penetrating include each data portion of the onboard program file with it is each in the flash memory of the vehicle electronic control unit The correspondence of the initial address of unit memory block.

3. the program file method for down loading of vehicle electronic control unit according to claim 2, which is characterized in that the base Unit memory block and the mapping relations is written in the interruption, obtains needing to continue download in the onboard program file Data portion, including：

Unit memory block is written based on the interruption, is searched in the mapping relations and unit memory block is written with described interrupt The data portion of the corresponding onboard program file of initial address；

By with the data portion for interrupting the corresponding onboard program file of the write-in initial address of unit memory block and it Data portion afterwards, as the data portion for needing to continue to download in the onboard program file.

4. the program file method for down loading of vehicle electronic control unit according to claim 2, which is characterized in that described to incite somebody to action The data portion for continuing to download is needed to be downloaded to vehicle electronic control unit in the onboard program file, including：

Interruption write-in unit memory block is wiped；

The data portion that will need to continue in the onboard program file to download be downloaded to interruptions be written unit memory block with And the unit memory block interrupted after write-in unit memory block.

5. the program file method for down loading of the vehicle electronic control unit according in claim 1,3 or 4 any one, It is characterized in that, the unit memory block is located at the program download area in the flash memory of the vehicle electronic control unit.

6. the program file method for down loading of vehicle electronic control unit according to claim 1, which is characterized in that the vapour The program file method for down loading of vehicle electronic control unit further includes：

When the first unit memory block interrupted in the flash memory that write-in unit memory block is the vehicle electronic control unit, By the unit memory block in the entire onboard program file download to the flash memory of the vehicle electronic control unit.

7. program file method for down loading according to claim 5, which is characterized in that the journey of the vehicle electronic control unit Sequence document down loading method further includes：

During by the onboard program file download to the vehicle electronic control unit, readback is downloaded to the vapour The onboard program file in vehicle electronic control unit, the onboard program file includes cyclic redundancy check code；

According to the vehicle-mounted journey for the unit memory block being downloaded in the flash memory of the vehicle electronic control unit that readback obtains Preface part generates verification cyclic redundancy check code；

If the cyclic redundancy check code that the verification cyclic redundancy check code includes with the onboard program file is not Unanimously, then the onboard program file is re-downloaded；

If the cyclic redundancy check code one that the verification cyclic redundancy check code includes with the onboard program file It causes, then the onboard program file downloaded in described program download area is written in the flash memory of the vehicle electronic control unit Program Operational Zone.

8. the program file method for down loading of vehicle electronic control unit according to claim 5, which is characterized in that the vapour The program file method for down loading of vehicle electronic control unit further includes：

Download state flag is set；

If the download state flag is first identifier, the onboard program file that will be downloaded in described program download area The program Operational Zone in the flash memory of the vehicle electronic control unit is written.

9. the program file method for down loading of vehicle electronic control unit according to claim 7 or 8, which is characterized in that Before the onboard program file write-in described program Operational Zone downloaded in the download area by described program, further include：

Program file in the erasing program Operational Zone.

10. the program file method for down loading of vehicle electronic control unit according to claim 8 or claim 9, which is characterized in that institute The program file method for down loading for stating vehicle electronic control unit further includes：

If the download state flag is second identifier, the onboard program text indicated in described program download area is sent Part downloads successful prompting message.

11. the program file method for down loading of vehicle electronic control unit according to claim 10, which is characterized in that described The program file method for down loading of vehicle electronic control unit further includes：

The control instruction that user sends is received, according to the control instruction, it is determined whether by what is downloaded in described program download area Onboard program file write-in described program Operational Zone.

12. the program file method for down loading of vehicle electronic control unit according to claim 1, which is characterized in that in institute It states before obtaining the interruption write-in unit memory block, further includes：

When by unit memory block in the flash memory of the onboard program file download to the vehicle electronic control unit, record Have been written into unit memory block.

13. a kind of program file download apparatus of vehicle electronic control unit, which is characterized in that including：

Acquisition module is mapped, is configured as obtaining the unit in the flash memory of onboard program file and vehicle electronic control unit and stores The mapping relations of block；

Download module is configured as downloading the unit in the onboard program file to the flash memory of the vehicle electronic control unit Memory block；

Acquisition module is interrupted, is configured as obtaining and interrupts write-in unit memory block, the interruption write-in unit memory block is described The unit memory block that onboard program file download process is just being written into when interrupting；

Searching module is configured as, based on interruption write-in unit memory block and the mapping relations, obtaining described vehicle-mounted The data portion for continuing to download is needed in program file；

The download module, the data portion for being additionally configured to need to continue in the onboard program file to download are downloaded to described Unit memory block in the flash memory of vehicle electronic control unit.

14. the program file download apparatus of vehicle electronic control unit according to claim 13, which is characterized in that described Mapping relations include each data portion of the onboard program file with it is each in the flash memory of the vehicle electronic control unit The correspondence of the initial address of a unit memory block.

15. the program file download apparatus of vehicle electronic control unit according to claim 14, which is characterized in that described Searching module is specifically configured to：

Unit memory block is written based on the interruption, is searched in the mapping relations and unit memory block is written with described interrupt The data portion of the corresponding onboard program file of initial address；

By with the data portion for interrupting the corresponding onboard program file of the write-in initial address of unit memory block and it Data portion afterwards, as the data portion for needing to continue to download in the onboard program file.

16. the program file download apparatus of vehicle electronic control unit according to claim 14, which is characterized in that described Download module includes：

Submodule is wiped, is configured as wiping interruption write-in unit memory block；

Submodule is written, the data portion for being configured as to need to continue in the onboard program file to download be downloaded to it is described in Disconnected write-in unit memory block and the unit memory block interrupted after write-in unit memory block.

17. the program file download apparatus of vehicle electronic control unit according to claim 13, which is characterized in that described Download module is additionally configured to：

When the first unit memory block interrupted in the flash memory that write-in unit memory block is the vehicle electronic control unit, By the unit memory block in the entire onboard program file download to the flash memory of the vehicle electronic control unit.

18. according to the program file download apparatus described in claim 13,15 or 16, which is characterized in that the unit memory block Program download area in the flash memory of the vehicle electronic control unit；

The program file download apparatus of the vehicle electronic control unit further includes：

Readback module is configured as by the process in the onboard program file download to the vehicle electronic control unit In, readback is downloaded to the onboard program file in the vehicle electronic control unit, and the onboard program file includes following Ring redundancy check code；

Check code generation module is configured as being downloaded in the flash memory of the vehicle electronic control unit according to what readback obtained The onboard program file of unit memory block generates verification cyclic redundancy check code；

The download module includes with the onboard program file if being additionally configured to the verification cyclic redundancy check code The cyclic redundancy check code it is inconsistent, then re-download the onboard program file；

First writing module includes if being configured as the verification cyclic redundancy check code and the onboard program file The cyclic redundancy check code is consistent, then the automobile is written in the onboard program file downloaded in described program download area Program Operational Zone in the flash memory of electronic control unit.

19. the program file download apparatus of the vehicle electronic control unit according to claim 13,15 or 16, feature exist In the unit memory block is located at the program download area in the flash memory of the vehicle electronic control unit；

The program file download apparatus of the vehicle electronic control unit further includes：

Setup module is configured as setting download state flag；

Second writing module will be in described program download area if it is first identifier to be configured as the download state flag The program Operational Zone in the flash memory of the vehicle electronic control unit is written in the onboard program file downloaded.

20. the program file download apparatus of vehicle electronic control unit according to claim 19, which is characterized in that described The program file download apparatus of vehicle electronic control unit further includes：

Sending module sends if it is second identifier to be configured as the download state flag and indicates described program download area In the successful prompting message of onboard program file download.