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Embedded system and its data deletion method

An embedded system and deletion method technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as waste of cache, system crashes, unfavorable file system large-scale operations, etc., to save processing data Time, usage reduction, deletion efficiency improvement effect

Inactive Publication Date: 2017-08-29
GUANGDONG VTRON TECH CO LTD
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Problems solved by technology

[0003] In an embedded system, the CPU is connected to a series of external devices such as RAM (Random Access Memory), flash (flash memory), etc., to delete files directly in the flash, only one data can be deleted one by one, which consumes a lot of time. A long time will waste the cache, resulting in high memory usage, which is not conducive to the execution of other tasks of the CPU, and is not conducive to the large-scale operations of the file system, and may even cause a system crash.

Method used

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  • Embedded system and its data deletion method
  • Embedded system and its data deletion method

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Embodiment Construction

[0018] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0019] The deletion method of embedded system data of the present invention, as figure 1 shown, including the following steps:

[0020] Step s101, read the deletion condition, and determine the file where the data to be deleted in the flash is located and the start and end positions in the file according to the deletion condition. Corresponding to this step may be a delete data interface function, which is called when there is data to be deleted. Since the file in flash is composed of file header data and each piece of data content, the file header data is designed...

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Abstract

The invention discloses an embedded system and a data deletion method thereof. The file where the data to be deleted is copied from the flash to the RAM, and then the data other than the data to be deleted in the file is written into the RAM, and finally copied back to the flash. The deletion operation is performed directly, but the purpose of data deletion is achieved. Due to the faster execution speed in RAM, the deletion efficiency is improved compared to direct deletion in flash, which not only saves data processing time, but also reduces CPU and memory usage.

Description

technical field [0001] The invention relates to the field of embedded technology, in particular to an embedded system and a data deletion method thereof. Background technique [0002] In the field of embedded system research, due to the continuous advancement of technology, the demand for quickly deleting files such as log files according to the specified location is getting higher and higher. During the deletion process, it is necessary to ensure time efficiency and improve CPU and memory usage. usage rate. [0003] In an embedded system, the CPU is connected to a series of external devices such as RAM (Random Access Memory), flash (flash memory), etc., to delete files directly in the flash, only one data can be deleted one by one, which consumes a lot of time. A long time will waste the cache and lead to high memory usage, which is not conducive to the execution of other tasks of the CPU, and is not conducive to large-scale operations of the file system, and may even caus...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
CPCG06F16/162G06F16/1815
Inventor 宋美威吴鹏
Owner GUANGDONG VTRON TECH CO LTD
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