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File System Management for SD Card Based on Remote Controller

Author: HuiDan
Tutor: ZengPeiFeng
School: Donghua University
Course: Computer Software and Theory
Keywords: MCU SD card FAT file system remote controller
CLC: TP273
Type: Master's thesis
Year: 2012
Downloads: 20
Quote: 0
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Abstract


With the rapid development of modern remote control and computer technology, the MCU based remote control system has gain a great evolution in industrial automation engineering. Especially in the applications with harsh physical environment, unattended, scattered working location or small amount but frequent data transactions, the remote control system could be used to monitor and operate the remote devices from several meters to several kilometers.When the remote controlling devices evolve to the direction of integrated, networked and intelligent, the amount of data to be processed by MCU is growing rapidly. In the traditional MCU chips, the small memory and storage space for programs become the bottleneck of the amount and speed of data processing. Therefore, a system using external storage device to store large amount of pre-defined command and procedures, categorize and do file operations against those commands and procedures, is needed. As a result, the MCU could just response to the specific set of command and execute the operations. In addition, the information of authorized servers, that is, the IPs and MAC addresses, is stored in external storage devices. The terminal device could make use of this information to authenticate the data source directly, to improve the response speed.A solution of file management system is proposed for MCS-51 based devices that are mainly used as various remote controllers. Storage devices such as SD are used to keep data and command contents that are received via network. Remote controllers listen, receive, and execute commands that come from network. A SD control circuit is proposed in the paper and a FAT32 file system for SD is realized to make it possible to collect, store, query, and maintain large amount of data for remote controllers. This system is easy to maintain and extend, and highly flexibly control could be realized. When the remote control system is working, the computers in control center are not necessarily to be always online, the remote controller is able to work in unattended mode according to preset schedule. The control center could also query the historical records from the log files stored in SD, for ease of managing and maintaining the files.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system
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