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EEPROM data reading method and device, electronic control equipment and medium

A data and data block technology, applied in data recording, configuration/installation of recording head, fixed installation, etc., can solve the problems of long initialization time, different FLASH data block sizes, and affecting the initialization time of the vehicle controller, etc., to improve The effect of reducing the initial response time and confirmation time

Pending Publication Date: 2021-04-23
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most vehicle controllers rely on non-volatile memory (FLASH for short) to store data in programmable read-only memory (EEPROM for short). different time
[0003] During the power-on and initialization process of the vehicle ECU (Electronic Control Unit), the method of determining the location of the valid data address is sequential addressing, that is, addressing and analysis from top to bottom, corresponding to the size of different FLASH data blocks The addressing time is different. When the FLASH data block is too large and the stored data is close to the end address of the FLASH data block, the initialization time will be too long, which will affect the initialization time of the vehicle controller. At the same time, some actuators Action cannot respond in time

Method used

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  • EEPROM data reading method and device, electronic control equipment and medium
  • EEPROM data reading method and device, electronic control equipment and medium
  • EEPROM data reading method and device, electronic control equipment and medium

Examples

Experimental program
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Embodiment 1

[0026] figure 1 A flow chart of a method for reading EEPROM data provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation of fast reading of programmable read-only memory data. The method can be read by a device for reading EEPROM data To execute, the device may be implemented in the form of software and / or hardware. Specifically include the following steps:

[0027] S110. After the vehicle electronic control unit is powered on, obtain the sector head corresponding to the current non-volatile memory data block.

[0028] Among them, the current non-volatile memory data block is the current Flash data block, the current Flash data block is 64Kb, then the EEPdata area of ​​the current Flash data block emulation is 8Kb, there are 8 current Flash data blocks, which can be set as block0 and block1 respectively , block2...block7, the length of each current Flash data block is 1024 words.

[0029] In the art each track is sliced ​​into circu...

Embodiment 2

[0043] figure 2 It is a flow chart of a method for reading EEPROM data provided by Embodiment 2 of the present invention. This embodiment is optimized on the basis of the foregoing embodiments.

[0044] Correspondingly, the method in this embodiment specifically includes:

[0045] S210. Write the historical non-volatile memory data block, and update the first address information of the historical non-volatile memory data block to the corresponding mask area.

[0046] Further, before updating the historical address information of the historical non-volatile memory data block to the corresponding mask area, it also includes: calculating the checksum of the historical non-volatile memory data block and writing it into the In the first address of the historical non-volatile memory data block; determine the mask area of ​​the historical non-volatile memory data block according to the checksum and the first address.

[0047] Wherein, the historical non-volatile memory data block ...

Embodiment 3

[0061] image 3 It is a structural diagram of an EEPROM data reading device provided by Embodiment 3 of the present invention. This embodiment is applicable to the situation of fast reading of programmable read-only memory data.

[0062] Such as image 3 As shown, the reading device includes: a sector head determination module 310, a target non-volatile memory data block determination module 320 and a data reading module 330, wherein:

[0063] A sector head determining module 310, configured to obtain the sector head corresponding to the current non-volatile memory data block after the vehicle electronic control unit is powered on;

[0064] A target non-volatile memory data block determination module 320, configured to determine the sector range of the current active partition based on the sector head, and determine the target non-volatile memory data block according to the sector range;

[0065] The data reading module 330 is configured to determine address information corr...

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Abstract

The embodiment of the invention discloses an EEPROM data reading method and device, electronic control equipment and a medium. The reading method comprises the steps of obtaining a sector magnetic head corresponding to a current nonvolatile memory data block after a vehicle electronic control unit is powered on; determining a sector range of a current active partition based on the sector magnetic head, and determining a target nonvolatile memory data block according to the sector range; determining address information corresponding to the target nonvolatile memory data block according to the target nonvolatile memory data block, and copying programmable read-only memory data into a random access memory according to the address information. According to the technical scheme of the embodiment of the invention, the determination time of the effective data address is shortened, and the initial response time of the actuator is prolonged.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of engine electronic control, and in particular to a method, device, electronic control equipment and medium for reading EEPROM data. Background technique [0002] At present, most vehicle controllers rely on non-volatile memory (FLASH for short) to store data in programmable read-only memory (EEPROM for short). The time taken is different. [0003] During the power-on and initialization process of the vehicle ECU (Electronic Control Unit), the method of determining the location of the valid data address is sequential addressing, that is, addressing and analysis from top to bottom, corresponding to the size of different FLASH data blocks The addressing time is different. When the FLASH data block is too large and the stored data is close to the end address of the FLASH data block, the initialization time will be too long, which will affect the initialization time of the vehicle control...

Claims

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Application Information

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IPC IPC(8): G11C16/26G11B5/49G11B5/55
CPCG11C16/26G11B5/4992G11B5/5526
Inventor 史家涛张国花刘晓波陈娜娜
Owner WEICHAI POWER CO LTD
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