Study Of Optimization Method For An Embedded Data Storage System

In recent years, with the increasing demand, the rate of data acquisition system i s demanded as fast as possible in many wild collective areas,such as astronomical ob servations, geological exploration, environmental monitoring, air satellite and so on. In recent years, with the increasing demand, the rate of data acquisition system is de manded as fast as possible in many wild collective areas,such as astronomical observ ations, geological exploration, environmental monitoring, air satellite and so on. whil e the faster acquisition rate,the highier rate requirements of the embedded data trans mission and storage systems.a lower power consumption embedded devices required cause a long time continuous work requirements within the harsh environment of fi eld work which proved to be more often.Therefore, under the basic premise of the lo w-power,we hope that the speed of embedded data transmission and storage system operating as high as possible. Based on this, this thesis set of a low-power embedded data transmission and storage system.This system uses highly integrated STM32F407microcontroller which having a low-power and high-performance to ensure that the system performance and low po wer consumption. The system uses fast Ethernet to long-distance data transmission via USB2.0high-speed interface for fast data storage and via using non-volatile stora ge medium U disk to achieve a flexible large-capacity removable data storage.。 in the low power consumption, the main reason of the slower network transmission spe ed of traditional embedded system is the network protocol unefficiency according to a low performance embedded system, this is also the difficulties we need to addres s。In this paper we agure that the system applied in a simple peer-to-peer network e nvironment, through improving embedded network protocol stack Implementation L wIP which in common used base on the idea of data zero-copy can improve the perfo rmance of network transmission.This system is a common set of general-purpose em bedded data transmission and storage system, under the base of the low-power consu mption acciving a high-performance in transmission and storage, which will have an practical value in many areas.The paper focuses on these following problems:1. a detailed presention respectively on the entirety program design of low-power high-volume data transfer and storage system based on STM32F407 microcontroller, and it’s design principles, selection basis and hardware circuit of the various functional modules.2. Lwip/udp protocol optimization bringing Fast Ethernet data transmission.3. bettering UDP protocol security Ethernet data transmission.4. the use of the STM32own Mass storage firmware library implements high-speed USB storage function.5. by transplantation of file system FatFs to achieve the U disk data management.Finally, the paper discusses the system’s debuging and testing, proved the feasibility of the system design, which can meet the stability of high-performance data transfer and storage.