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针对目前航天探测中大量科学数据存储的问题,设计了兼顾存储容量大和缓存速度快两大特点的探空火箭数据存储系统。CPU采用TI最新推出的TMS570LS3137,数据存储系统的设计主要是利用该芯片的EMIF模块和SPI模块。外部存储器接口(EMIF)提供较大的寻址空间可以扩展多个外接板卡,选用SDRAM作为高速缓存的核心部件,SPI接口模块直接与SD卡卡槽相连接,选用SD卡作为大容量存储设备。给出了部分软件设计流程图以及系统测试结果图,测试结果显示该系统实现了设计目的,在航天工程领域具备一定的利用价值。
Aiming at the problem of a large amount of scientific data storage in aerospace exploration, a sounding rocket data storage system is designed which takes into account two major characteristics: large storage capacity and fast caching speed. CPU using TI’s latest TMS570LS3137, data storage system design is the use of the chip’s EMIF module and SPI module. The external memory interface (EMIF) provides a large addressing space for expansion of multiple external boards. SDRAM is used as the core component of the cache. The SPI interface module is directly connected to the SD card slot. The SD card is used as a large-capacity storage device . Part of the software design flow chart and system test results are given, the test results show that the system has achieved the design purpose, and has certain value in the field of aerospace engineering.