Satellite-borne FPGA software on-orbit reconstruction method

Abstract

The invention discloses a satellite-borne FPGA software on-orbit reconstruction method. The method comprises the following steps: (1) generating a reconstruction difference data packet and storing the reconstruction difference data packet; (2) compressing the reconstructed difference data packet to generate a compressed packet; (3) packaging the optimal compression parameter and the compressed packet, adding decompression information, and generating a reconstructed upper injection packet; (4) injecting the reconstructed uploading packets into the satellite according to the characteristics of the uplink of the aircraft on the ground, verifying and writing the reconstructed uploading packets into an uploading storage region until uploading of all the subpackets is completed; (5) the on-satellite processor scans all the uploading sub-packages in the uploading storage region, identifies all wrong sub-packages and sub-packages which are not uploaded, and downloads an recognition result to the ground; (6) reinjection is carried out on the ground according to the recognition result until all reconstructed upper injection subpackages pass verification; and (7) the on-satellite processor decompresses the original BIT data and the decompressed data to perform bitwise exclusive OR, restores a reconstructed original code, writes the reconstructed original code into an FPGA external memory, and finally resets the FPGA to reload the BIT file to complete on-orbit reconstruction of the FPGA software.

Description

technical field [0001] The invention relates to an on-orbit reconfiguration method for a space-borne large-capacity FPGA software, which is used for on-orbit reconfiguration of the FPGA software of a space vehicle. Background technique [0002] During the in-orbit service of the spacecraft, if there is a problem with the on-board FPGA software during operation or new functions need to be implemented, the software needs to be repaired or upgraded. At present, the main method of on-orbit reconstruction of spaceborne FPGA is to directly inject the modified FPGA program into the device from the ground, and then load the modified FPGA program through the on-orbit maintenance program. This method requires a large memory to store The file is uploaded, and the transmission time is very long due to the large size of the injected file. There is a risk of failure during the uploading process. Once a transmission error occurs during the uploading process or the aircraft’s energy supply ...

AI Technical Summary

Problems solved by technology

[0003] The technology of the present invention solves the problem: overcomes the deficiency of existing FPGA on-orbit reconfiguration technology, and provides a method that can effectively perform on-orbit reconfiguration of on-board FPGA software. This method consumes less resources and has a simple algorithm, and is more suitable for resources affected by limited embedded system, and good portability, which effectively improves the reliability and maintainability of on-orbit aircraft

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