flash file system 中文意思是什麼
flash file system
解釋
快閃檔案系統-
And a uc / os - ii fat file system with high performance library, which can be used on nand flash, will be described in this paper
同時本文也詳細討論了在un os -下搭建nand快閃存儲器文件系統的各項關鍵技術。 -
These modules provide interfaces to be used directly from userspace : raw character access, raw block access, ftl flash transition layer - a type of filesystem used on flash, and jfs or journaled file system - which provides a filesystem directly on the flash rather than emulating a block device
這些模塊提供從用戶空間直接使用的介面：原始字元訪問、原始塊訪問、 ftl （閃存轉換層， flash transition layer用在閃存上的一種文件系統）和jfs （即日誌文件系統， journaled file system在閃存上直接提供文件系統而不是模擬塊設備） 。 -
Then, we transplant an embedded linux on a hand - held device and illustrate some practice of a flash file system based on an mtd device
在移植了一個基於掌上設備的嵌入式linux之後，本文介紹了針對基於mtd設備的flash文件系統的一些實踐方法。 -
( 3 ) study deeply the structure of fat 16 file system and the characteristic of flash disk, and develop the file management software of flash disk to manage nc files effectively according to the management idea of fat 16 file system. ( 4 ) research the module and protocol of reliable communication in serial network, which are composed of arm main control board, dsp motion control board, keyboard board, i / o control board and encoder signal collection board, and then develop communication software of the serial network. ( 5 ) study the principle of displaying char in lcd and the method of embedding font library into operating system, and research deeply the method of embedding chinese font library into os in the light of the characteristic of chinese
本論文的主要研究內容如下： （ 1 ）研究uc os -實時嵌入式操作系統在硬體平臺上的移植及其佔先式內核的任務調度原理，合理分割銑床控制系統的管理任務，根據任務的要求賦予不同的優先級和調度時間，保證任務的執行效率和實時性； （ 2 ）開發底層設備驅動程序和應用程序介面（ api ）函數，以便於進行系統應用軟體的開發； （ 3 ）深入研究fat16文件系統的結構和固態盤的硬體特性，參照fat16文件系統的管理思路，開發固態盤文件管理軟體以有效管理nc代碼文件； （ 4 ）深入研究由arm主控板、鍵盤板、 i o控制板、編碼器信號採集板等裝置組成的串口通訊網路可靠通信的模型及其通訊協議，開發串口通訊網路通信軟體； （ 5 ）研究字元的顯示原理和在操作系統中嵌入字庫的方法，在此基礎上結合漢字的特性深入研究中文字庫的嵌入方法，開發中文字庫嵌入軟體，滿足開發操作界面的信息要求； （ 6 ）深入研究三維圖形坐標變換的原理，開發實用的三維加工軌跡顯示軟體，便於操作者對零件的加工過程進行監控和診斷。 -
Jffs2 : the journalling flash file system, version 2
Jffs2 ：日誌閃存文件系統，第2版 -
Have transplanted and tested the r / w yaffs file system to nand flash memory, build cramfs + yaffs multi file system on the basis of this. have solved problems about the dynamic access of the data and systematic issue of stability in the system
針對nand型閃存移植並測試了可讀寫的yaffs文件系統，基於此構建了cramfs + yaffs的多文件系統，解決了家庭網關中動態數據存取和系統的安全穩定性問題。 -
Because the reliability of nand flash chip is relatively low, the error detection and correction algorithm is discussed, and an algorithm fit for embedded system is introduced. also in the file system, an wear leveling function is provided
由於閃存晶元的可靠性相對較差，文中結合差錯校驗機制（ ecc ）與差錯糾正機制（ edc ）的原理實現了適合嵌入式系統的ecc與edc的演算法，並為該文件系統實現了平衡擦寫演算法。 -
A classic case of this conceptual distinction is the way that freebsd - harking back to the bsd unix world - uses unix file system v2 ufs2 to organize data on the disk and the flash file system to organize files into directories and optimize directory access
這種總體區分的一個經典例子就是freebsd回溯到bsd unix時代用unix file system v2 （ ufs2 ）來組織磁盤上的數據而用flash file system （ ffs ）來把文件組織成目錄並最優化目錄訪問的方式。 -
The stage of hardware designing : chose sdram and flash as the physical storage of this system ; designing and realizing sdram circuit, flash circuit, watchdog circuit, rtc circuit, serial communication circuit, networking communication circuit ; the stage of software designing : designing the bootloader program with the function of downloading file with tftp protocol, flash writing and reading, serial communication, booting linux kernel and so on ; transplanting the linux 2. 4 kernel on this hardware system ; designing and realizing linux driver and give a detail of rtc and wdt drivers ’ designing and realization
軟體設計階段:針對本系統應用環境設計了有tftp文件下載、 flash讀寫、串口通信、 linux內核引導等功能的bootloader程序;通過修改linux2 . 4內核源碼中針對硬體平臺部分代碼，完成了內核linux2 . 4到本平臺的移植;驅動設計部分實現了實時時鐘、看門狗、串口、網口等硬體在本系統linux2 . 4平臺下的驅動程序，文中詳細的介紹了實時時鐘和看門狗驅動實現，特別介紹了看門狗模塊中i2c協議的軟體實現。 -
Design and implementation of flash file system in s3c44b0x embedded system
文件系統的設計與實現 -
This thesis analyses the features of flash memory and advances the requirements for the flash - based filesystem. then it discusses how the journalling flash file system ( jffs ) is designed to achieve these requirements
本文對jffs進行了深入的研究，在分析了閃存特性的基礎上，給出了基於閃存的文件系統的設計要求。 -
Read lots of usb technology data or papers, especially about usb host system and flash file system ; 2. read and research chipset datasheet, make out the system scheme, contains chipset selecting, scheme planning and pcb making ; 3
本文正是針對上述問題，以嵌入式usb應用為主要的研究對象，在深入分析usb協議的基礎上，設計並開發符合要求的對錄儀。 -
The research area covered by the thesis includes embedded system design, hardware infrastructure of embedded gis system, architecture of nand flash, error detect code / error check code and there algorithm, journal file system, gis file index, wear leveling for nand flash, file system page cache and write delay, dynamic compression in file system etc. first, the thesis first analysis the embedded gis status in quo, technology background, difficulty it facing
本文研究領域涉及嵌入式系統開發、嵌入式gis系統軟硬體框架、 nand晶元體系結構、差錯檢測差錯校驗（ edc ecc ）演算法、日誌文件系統、文件索引、晶元擦寫平衡、文件系統頁面cache與延遲寫技術、文件系統實時壓縮等技術。
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