Abstract
During the factory test of a certain computer, the 1553B self-test is abnormal. Through the analysis, it is found that the RAMLB signal pin constraint error in the FPGA firmware caused the failure. In the case of a certain difference in the characteristics of the chip, the 1553B extended SRAM storage function is unstable, and the existing drivers and applications use the extended storage area, which eventually leads to unstable communication. This problem was solved by modifying the 1553B driver. The research in this paper enriches the research of computer 1553B communication and provides theoretical support and basis for subsequent development, design, and solving practical problems.
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