Power-down protecting method and system for improving data safety of vehicle terminal system

Abstract

The invention discloses a power-down protecting method and system for improving data safety of a vehicle terminal system. The method comprises the following steps that a, data in the system are classified, and if the data are read-write data, the data are stored in an Eeprom; if the data are read-only data, the data are stored in a Flash; b, when a request for reading a file is received, a source of file data is judged; b1, if the data are the read-only data, the data are read from the Flash; b2, if the data are the read-write data, the data are read from the Eeprom; c, the data in the Flash are written by a manufacturer, and the data are operated only when software needs to be upgraded in the future; d, when the system receives a request for building a file and writing in the file when operating, the data are written into the Eeprom. According to the power-down protecting method and system, through a new storage mechanism, data damage caused by power-down is avoided, data safety of the vehicle terminal system is greatly improved, and the fault rate of a vehicle terminal is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of locomotive data security, and relates to a power-off protection method and system for improving data security of locomotive systems. Background technique [0002] The MPU is the main operating environment of the program, and all the programs and data of the car-machine system are stored in the NandFlash memory. At present, the NandFlash memory implementation scheme of the car machine on the market generally has the problem of "data corruption when writing power failure": the so-called "data corruption when writing power failure" means that a sudden power failure occurs during the process of writing data to the NandFlash memory. This loss of power often results in corruption of the data inside. During the operation of the car entertainment system, the data in the NandFlash will be read and written at any time, and the power fluctuation of the car system is also very random. For example, when the car is tu...

AI Technical Summary

Problems solved by technology

At present, the NandFlash memory implementation scheme of the car machine on the market generally has the problem of "data corruption when writing power failure": the so-called "data corruption when writing power failure" means that in the process of writing data to the NandFlash memory, there is a sudden power failure

However, in this technical solution, after a series of data processing, the data that needs to be written is still stored in the NandFlash, and there is still a risk of data loss when the power is turned off.

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