A file management method and system based on flash free area
A file management method and free area technology, applied in the file management method and system field based on FLASH free area, can solve the problems of cumbersome update methods, unbalanced storage space consumption, and complicated program design.
Active Publication Date: 2021-03-12
ZHONGBEI UNIV
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Problems solved by technology
However, since this kind of file management method needs to open up a certain amount of memory to store index information, and each time the data is stored, the files in the index area need to be updated. Reserving blocks for storing file information for operations such as erasing and writing will make the loss of block storage space in this part not well balanced
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[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.
[0042] like figure 1 As shown, in the embodiment of the present invention, the method includes the following steps:
[0043] Step S110, FPGA receives the write index file request sent by the host computer, obtains the starting block address and index number of this storage from the address area of the ROM storage unit according to the write index file request, and writes the obtained index number into FLASH The free area of the storage unit;
[0044] Wherein, the index number has an upper limit value, and the upper limit value should be greater than or equal to the total block storage space of the FLASH storage unit, and the number of occupied bits of each page in the free area...
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The invention discloses a file management method and system based on FLASH free area. The system includes: a host computer, FPGA and a data storage module, the data storage module includes a ROM storage unit and a FLASH storage unit; the ROM storage unit storage unit is divided into configurations Area and address area, the FLASH storage unit is divided into data area and free area, the configuration area is used to store the configuration information of the data storage module, and the address area is used to store the starting block address of the user file, the number of blocks occupied by the user file and the index number; The data area is used to store user files; the free area is used to store index number information. The present invention obtains the file index number information list by acquiring the index number information of the free area, reads the block start address stored in the user file in the index number information list, and according to the start address corresponding to the index number and the space occupied by the user file The total number of blocks can determine the storage location of the required user files, so as to realize the visual and selective reading of user data by the host computer.
Description
technical field [0001] The invention relates to the technical field of file management, in particular to a file management method and system based on a free area of FLASH. Background technique [0002] With the rapid development of modern science and technology, the storage and reading of large-capacity data has been widely used in many fields such as aerospace, surveying, and medical treatment. In the actual environment, people always hope to use a large amount of data to better study the relationship between data, or to find problems in time through data comparison so as to avoid possible problems, and then provide directness in future design practice. experience of. Therefore, the research on large-capacity storage has never stopped. [0003] In scientific research and industrial production, more and more dynamic information needs to be processed, and the amount of data to be studied is also increasing. Correspondingly, the storage capacity, storage speed, and reading...
Claims
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IPC IPC(8): G06F16/18G06F16/13
Inventor 焦新泉赵冬青
Owner ZHONGBEI UNIV