Time-division multiplexing management method for reading and writing files in small satellite solid-state memory

Abstract

The invention relates to a time division multiplexing management and file reading-writing method for a solid state memory of a small satellite. The storage arrays of the solid state memory are integrated into an integral body for arranging storage addresses in a unified way; an input data cache and an output data cache are created; a data bus with a DMA controller connects the storage arrays with the input data cache and the output data cache; when the solid state memory records data, the data in the input data cache is recorded in a storage space through the data bus to finish writing operation; when the solid state memory reads the data, the input data cache reads the data in the storage space through the data bus to finish reading operation; the DMA controller controls reading time and writing time corresponding to data bus occupation time of the reading and writing operations so as to realize time division multiplexing of the data bus; the DMA controller performs time slice division on the data bus occupation time and allocates time slices to the reading and writing operations in sequence; the solid state memory executes reading and writing functions at the same time; and the demand of writing current file data and reading currently or historically written file data at the same time by the solid state memory is met.

Description

technical field [0001] The invention relates to a time-division multiplex management read-write file method for a small satellite solid-state memory, to meet the requirement that a satellite writes current file data into the solid-state memory and simultaneously reads the currently written or historically written file data. Background technique [0002] The data transmission of small satellites to the ground is affected by the visible range of the ground station, and the data transmission from the satellite to the ground can only be completed within the visible range of the ground station. This method can only transmit the data acquired by the payload within the visible range of the ground station to the Ground station; if the data acquired by the payload outside the visible range of the ground station needs to be stored in the solid-state memory in the form of a file, when entering the visible range of the ground station, the file data in the solid-state memory will be playe...

AI Technical Summary

Problems solved by technology

And because each file is composed of a large number of addresses located in different banks, in view of the effective resources of the single-chip microcomputer, it is extremely difficult to design a software that writes down multiple files at the same time

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