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最新嵌入式系統(tǒng)|常用詞匯表2

時(shí)間:2009-06-18 23:06:36來(lái)源:網(wǎng)絡(luò) 作者:admin 點(diǎn)擊:
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精簡(jiǎn)指令集計(jì)算機(jī)。一個(gè)處理器族的描述。RISC處理器一般的特征是固定長(zhǎng)度的指令集,一個(gè)負(fù)載儲(chǔ)備存儲(chǔ)結(jié)構(gòu),和大量通用寄存器,及寄存器窗口。MIPS處理器族是極好的例子。相對(duì)CISC而言。

 

ROM(只讀存儲(chǔ)器)
Read-Only Memory. A broad classification of memory devices that includes all devices in which the individual memory locations may be read, but not written.
只讀存儲(chǔ)器。一個(gè)包括所的的每個(gè)地址只能被讀,不能被寫(xiě)的存儲(chǔ)器的大概分類(lèi)。

 

ROM emulator(ROM模擬器)
A debugging tool that takes the place of-or emulates-the ROM on your target board. A ROM emulator acts very much like a debug monitor, except that it includes its own serial or network connection to the host.
一種在你的目標(biāo)板上代替或模擬ROM的調(diào)試工具。ROM模擬器動(dòng)作起來(lái)象一個(gè)除錯(cuò)監(jiān)視器,除了它包含自己連到主機(jī)上的串口或網(wǎng)絡(luò)外。

 

ROM monitor
See debug monitor.

 

RTOS(實(shí)時(shí)操作系統(tǒng))
Real-Time Operating System. An operating system designed specifically for use in real-time systems.
實(shí)時(shí)操作系統(tǒng)。一種被特殊設(shè)計(jì)來(lái)用在實(shí)時(shí)系統(tǒng)中的操作系統(tǒng)。

 

race condition(競(jìng)爭(zhēng)狀態(tài))
A situation in which the outcome of a program may be affected by the exact order in which the instructions are executed. Race conditions are only an issue where interrupts and/or preemption are possible and where critical sections exist.
一種程序運(yùn)行的結(jié)果可能被指令執(zhí)行的順序影響的情形。競(jìng)爭(zhēng)狀態(tài)僅僅有一種情況下產(chǎn)生,在此處中斷或(和)優(yōu)先搶占是充許的并且有一個(gè)臨界區(qū)存在。

 

real-time system(實(shí)時(shí)系統(tǒng))
Any computer system, embedded or otherwise, that has deadlines. The following question can be used to distinguish real-time systems from the rest: "Is a late answer as bad, or even worse, than a wrong answer?" In other words, what happens if the computation doesn"t finish in time? If nothing bad happens, it"s not a real-time system. If someone dies or the mission fails, it"s generally considered "hard" real-time, which is meant to imply that the system has "hard" deadlines. Everything in between is "soft" real-time.
    任何計(jì)算機(jī)系統(tǒng),嵌入的或其他的,有一個(gè)死線。以下的問(wèn)題可經(jīng)被用來(lái)區(qū)分實(shí)時(shí)系統(tǒng)與其他的系統(tǒng):“是遲到的回答壞,還是一個(gè)錯(cuò)誤的回答壞?”換句話說(shuō),如果計(jì)算機(jī)沒(méi)有在指定時(shí)間內(nèi)完成它的工作會(huì)發(fā)生什么?如果什么也沒(méi)有發(fā)生,它不是一個(gè)實(shí)時(shí)系統(tǒng)。如果一些人死或任務(wù)失敗,它被認(rèn)為是“硬”實(shí)時(shí)系統(tǒng),意思是系統(tǒng)有一個(gè)“硬”死線。介于兩者之間的是“軟”實(shí)時(shí)系統(tǒng)。

 

Recursive(遞歸)
Said of software that calls itself. Recursion should generally be avoided in an embedded system, since it frequently requires a large stack.
自己調(diào)用自己的程序的說(shuō)法。遞歸一般在嵌入式系統(tǒng)中是不充許的,因?yàn)樗3U加写罅康亩褩?臻g。

 

Reentrant(可再入的)
Said of software that can be executed multiple times simultaneously. A reentrant function can be safely called recursively or from multiple tasks. The key to making code reentrant is to ensure mutual exclusion whenever accessing global variables or shared registers.
可同時(shí)多次運(yùn)行的程序的說(shuō)法。可再入的函數(shù)可以被安全地遞歸調(diào)用或由多任務(wù)多次調(diào)用。使代碼可再入的關(guān)鍵在于確保在訪問(wèn)全局變量或共享寄存器時(shí)互斥現(xiàn)象發(fā)生。

 

Register(寄存器)
A memory location that is part of a processor or an I/O device. In other words, it"s not normal memory. Generally, each bit or set of bits within the register controls some behavior of the larger device.
是處理器或I/O設(shè)備一部分的儲(chǔ)存器的地址。換句話說(shuō),不是標(biāo)準(zhǔn)的儲(chǔ)存器。一般地,在寄存器控制每一二進(jìn)制位或二進(jìn)制位的集控制大量設(shè)備的一些行為。

 

Relocatable(可重定位的)
A file containing object code that is almost ready for execution on the target. The final step is to use a locator to fix the remaining relocatable addresses within the code. The result of that process is an executable.
包含幾乎可以準(zhǔn)備好在目標(biāo)機(jī)上運(yùn)行的目標(biāo)代碼的文件。最后一步是使用定位程序去整理保留在代碼中的可重定位地址。這個(gè)步驟的結(jié)果是一個(gè)可執(zhí)行的程序。本文由容源電子網(wǎng)(www.jssjbk.com)整理提供,部分內(nèi)容來(lái)源于網(wǎng)絡(luò),如有侵犯到你的權(quán)利請(qǐng)與我們聯(lián)系更正。

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