High speed data access algorithm for automatic weather station NAND flash extended storage based on STM32

With the development demand of refined meteorological services and short-impending prediction, especially the requirement of "meteorological observation data to the forecaster's desk within one minute", higher software and hardware design requirements are put forward for the system performance of automatic weather station, such as large capacity, high-speed real-time performance and accuracy etc.Large capacity storage and high-speed real-time accurate reading and writing in the automatic weather station are the most front-end key points in the application of meteorological observation data transmission. The physical structure of NAND flash memory chip-K9LBG08U0M is analyzed based on the design of STM32 FSMC external scalable storage. The immediate mapping and addressing between the observation data and the physical address of the corresponding flash memory is established by taking the time offset of the observation data, which is the only primary key to one-to-one mapping relationship between them, and then high speed observation data access algorithm of the automatic weather station is generated, combining the storage characteristics of Nandflash. The observation data reading and writing of automatic weather stations are real-time, high-speed, accurate and stable, which is shown by the practical observation application of over 3000 automatic weather stations in the whole province, meeting the high-quality business development demand of "one minute to desktop" meteorological data from observation to forecast.