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与”跳转到开始代码”这样的意思相同。&nbsp;<br />
reset&nbsp;vector&nbsp;<br />
See&nbsp;reset&nbsp;address.&nbsp;<br />
S&nbsp;<br />
SRAM（静态随机访问储存器）&nbsp;<br />
Static&nbsp;Random-Access&nbsp;Memory.&nbsp;A&nbsp;type&nbsp;of&nbsp;RAM&nbsp;that&nbsp;retains&nbsp;its&nbsp;contents&nbsp;as&nbsp;long&nbsp;<br />
&nbsp;as&nbsp;the&nbsp;system&nbsp;is&nbsp;powered&nbsp;on.&nbsp;Data&nbsp;stored&nbsp;in&nbsp;an&nbsp;SRAM&nbsp;is&nbsp;lost&nbsp;when&nbsp;the&nbsp;system&nbsp;<br />
&nbsp;is&nbsp;powered&nbsp;down&nbsp;or&nbsp;reset.&nbsp;<br />
静态随机访问储存器。一种在系统上电时以保持它的内容的储存器。当系统断电或重启&nbsp;<br />
时，保存在SRAM中的内容将丢失。&nbsp;<br />
Scheduler（调度程序）&nbsp;<br />
The&nbsp;part&nbsp;of&nbsp;an&nbsp;operating&nbsp;system&nbsp;that&nbsp;decides&nbsp;which&nbsp;task&nbsp;to&nbsp;run&nbsp;next.&nbsp;This&nbsp;de&nbsp;<br />
cision&nbsp;is&nbsp;based&nbsp;on&nbsp;the&nbsp;readiness&nbsp;of&nbsp;each&nbsp;task,&nbsp;their&nbsp;relative&nbsp;priorities,&nbsp;an&nbsp;<br />
d&nbsp;the&nbsp;specific&nbsp;scheduling&nbsp;algorithm&nbsp;implemented.&nbsp;<br />
操作系统中决定下一次哪个任务运行的那部分。决定基于每一个任务的就绪，它们的优&nbsp;<br />
先级关系，和特殊调度算法的实现。&nbsp;<br />
Semaphore（信号灯）&nbsp;<br />
A&nbsp;data&nbsp;structure&nbsp;that&nbsp;is&nbsp;used&nbsp;for&nbsp;intertask&nbsp;synchronization.&nbsp;Semaphores&nbsp;are&nbsp;&nbsp;<br />
usually&nbsp;provided&nbsp;by&nbsp;the&nbsp;operating&nbsp;system.&nbsp;<br />
用于进程间同步的数据结构。信号灯常常由操作系统提供。&nbsp;<br />
Simulator（仿真器）&nbsp;<br />
A&nbsp;debugging&nbsp;tool&nbsp;that&nbsp;runs&nbsp;on&nbsp;the&nbsp;host&nbsp;and&nbsp;pretends&nbsp;to&nbsp;be&nbsp;the&nbsp;target&nbsp;process&nbsp;<br />
or.&nbsp;A&nbsp;simulator&nbsp;can&nbsp;be&nbsp;used&nbsp;to&nbsp;test&nbsp;pieces&nbsp;of&nbsp;the&nbsp;software&nbsp;before&nbsp;the&nbsp;embedd&nbsp;<br />
ed&nbsp;hardware&nbsp;is&nbsp;available.&nbsp;Unfortunately,&nbsp;attempts&nbsp;to&nbsp;simulate&nbsp;interactions&nbsp;w&nbsp;<br />
ith&nbsp;complex&nbsp;peripherals&nbsp;are&nbsp;often&nbsp;more&nbsp;trouble&nbsp;than&nbsp;they&nbsp;are&nbsp;worth.&nbsp;<br />
一种运行在主机上，装作目标机处理器的调试工具。仿真器一般用来测试嵌入式硬件可&nbsp;<br />
用之前的软件。不幸地，与模拟与复杂地外设进行交互的尝试常常比它们做到的更差。&nbsp;<br />
&nbsp;<br />
software&nbsp;interrupt（软件中断）&nbsp;<br />
An&nbsp;interruption&nbsp;of&nbsp;a&nbsp;program&nbsp;that&nbsp;is&nbsp;initiated&nbsp;by&nbsp;a&nbsp;software&nbsp;instruction.&nbsp;So&nbsp;<br />
ftware&nbsp;interrupts&nbsp;are&nbsp;commonly&nbsp;used&nbsp;to&nbsp;implement&nbsp;breakpoints&nbsp;and&nbsp;operating&nbsp;s&nbsp;<br />
ystem&nbsp;entry&nbsp;points.&nbsp;Unlike&nbsp;true&nbsp;interrupts,&nbsp;they&nbsp;occur&nbsp;synchronously&nbsp;with&nbsp;re&nbsp;<br />
spect&nbsp;to&nbsp;program&nbsp;execution.&nbsp;In&nbsp;other&nbsp;words,&nbsp;software&nbsp;interrupts&nbsp;always&nbsp;occur&nbsp;<br />
&nbsp;at&nbsp;the&nbsp;beginning&nbsp;of&nbsp;an&nbsp;instruction&nbsp;execution&nbsp;cycle.&nbsp;<br />
由软件指令发起的的一个程序的中断。软件中断被用来实现中断点他操作系统进入点。&nbsp;<br />
不象真实的中断，那些中断在不防碍程序执行时同步发生。换句话说，软件中断常常在&nbsp;<br />
指令运行周期的开始发生。&nbsp;<br />
Stack（堆栈）&nbsp;<br />
An&nbsp;area&nbsp;of&nbsp;memory&nbsp;that&nbsp;contains&nbsp;a&nbsp;last-in-first-out&nbsp;queue&nbsp;of&nbsp;storage&nbsp;for&nbsp;par&nbsp;<br />
ameters,&nbsp;automatic&nbsp;variables,&nbsp;return&nbsp;addresses,&nbsp;and&nbsp;other&nbsp;information&nbsp;that&nbsp;m&nbsp;<br />
ust&nbsp;be&nbsp;maintained&nbsp;across&nbsp;function&nbsp;calls.&nbsp;In&nbsp;multitasking&nbsp;situations,&nbsp;each&nbsp;ta&nbsp;<br />
sk&nbsp;generally&nbsp;has&nbsp;its&nbsp;own&nbsp;stack.&nbsp;<br />
一个包含后进先出队列的内存区域，用来存储参数、自动变量、返回地址和其他一些必&nbsp;<br />
须在函数调用中进行维护的信息。在多任务情况下，每一个任务一般都有自己的堆栈区&nbsp;<br />
。&nbsp;<br />
stack&nbsp;frame（堆栈帧）&nbsp;<br />
An&nbsp;area&nbsp;of&nbsp;the&nbsp;stack&nbsp;associated&nbsp;with&nbsp;a&nbsp;particular&nbsp;function&nbsp;call.&nbsp;<br />
一个关联特殊函数调用的堆栈区域。&nbsp;<br />
startup&nbsp;code（启动代码）&nbsp;<br />
A&nbsp;piece&nbsp;of&nbsp;assembly&nbsp;language&nbsp;code&nbsp;that&nbsp;prepares&nbsp;the&nbsp;way&nbsp;for&nbsp;software&nbsp;written&nbsp;<br />
&nbsp;in&nbsp;a&nbsp;high-level&nbsp;language.&nbsp;Most&nbsp;C/C++&nbsp;cross-compilers&nbsp;come&nbsp;with&nbsp;startup&nbsp;code&nbsp;<br />
&nbsp;that&nbsp;you&nbsp;can&nbsp;modify,&nbsp;compile,&nbsp;and&nbsp;link&nbsp;with&nbsp;your&nbsp;embedded&nbsp;programs.&nbsp;<br />
一个汇编语言代码，它为高级语言写的软件准备好运行的前期工作。大多数C/C++交叉编&nbsp;<br />
译器在你可以修改、编译他连接你的嵌入式程序时与启动代码一起来到。&nbsp;<br />
T&nbsp;<br />
Target（目标机）&nbsp;<br />
Another&nbsp;name&nbsp;for&nbsp;the&nbsp;embedded&nbsp;system.&nbsp;This&nbsp;term&nbsp;is&nbsp;usually&nbsp;used&nbsp;during&nbsp;softw&nbsp;<br />
are&nbsp;development,&nbsp;to&nbsp;distinguish&nbsp;the&nbsp;embedded&nbsp;system&nbsp;from&nbsp;the&nbsp;host&nbsp;with&nbsp;which&nbsp;<br />
&nbsp;it&nbsp;communicates.&nbsp;<br />
嵌入式系统的另一个名字。这个术语常常在软件开发期间使用，用来区别与嵌入式系统&nbsp;<br />
通讯的主机。&nbsp;<br />
Task（任务）&nbsp;<br />
The&nbsp;central&nbsp;abstraction&nbsp;of&nbsp;an&nbsp;operating&nbsp;system.&nbsp;Each&nbsp;task&nbsp;must&nbsp;maintain&nbsp;its&nbsp;&nbsp;<br />
own&nbsp;copy&nbsp;of&nbsp;the&nbsp;instruction&nbsp;pointer&nbsp;and&nbsp;general-purpose&nbsp;registers.&nbsp;Unlike&nbsp;pr&nbsp;<br />
ocesses,&nbsp;tasks&nbsp;share&nbsp;a&nbsp;common&nbsp;memory&nbsp;space&nbsp;and&nbsp;must&nbsp;be&nbsp;careful&nbsp;to&nbsp;avoid&nbsp;over&nbsp;<br />
writing&nbsp;each&nbsp;other&quot;s&nbsp;code&nbsp;and&nbsp;data.&nbsp;<br />
Thread（线程）&nbsp;<br />
Another&nbsp;name&nbsp;for&nbsp;a&nbsp;task.&nbsp;This&nbsp;name&nbsp;is&nbsp;more&nbsp;common&nbsp;in&nbsp;operating&nbsp;systems&nbsp;that&nbsp;&nbsp;<br />
support&nbsp;processes.&nbsp;A&nbsp;task&nbsp;is&nbsp;simply&nbsp;a&nbsp;thread&nbsp;in&nbsp;a&nbsp;single-process&nbsp;system.&nbsp;<br />
Tracepoint&nbsp;（跟踪点）&nbsp;<br />
Like&nbsp;a&nbsp;breakpoint&nbsp;except&nbsp;that&nbsp;a&nbsp;counter&nbsp;is&nbsp;incremented&nbsp;rather&nbsp;than&nbsp;stopping&nbsp;&nbsp;<br />
the&nbsp;program.&nbsp;Tracepoints&nbsp;are&nbsp;not&nbsp;supported&nbsp;by&nbsp;all&nbsp;debugging&nbsp;tools.&nbsp;<br />
象中断点，除了停止程序时，计数器还被增加外。跟踪点不是被所有的调试工具支持。&nbsp;<br />
&nbsp;<br />
Trap（陷入）&nbsp;<br />
An&nbsp;interruption&nbsp;of&nbsp;a&nbsp;program&nbsp;that&nbsp;is&nbsp;triggered&nbsp;by&nbsp;the&nbsp;processor&quot;s&nbsp;own&nbsp;intern&nbsp;<br />
al&nbsp;hardware.&nbsp;For&nbsp;example,&nbsp;the&nbsp;processor&nbsp;might&nbsp;trap&nbsp;if&nbsp;an&nbsp;illegal&nbsp;opcode&nbsp;is&nbsp;f&nbsp;<br />
ound&nbsp;within&nbsp;the&nbsp;program.&nbsp;Compare&nbsp;with&nbsp;software&nbsp;interrupt.&nbsp;<br />
一个由处理器内部硬件触发的程序中断。例如，处理器可能在一个错误的代码在程序中&nbsp;<br />
被发现时陷入。对比软件中断。&nbsp;<br />
V&nbsp;<br />
volatile（动态）&nbsp;<br />
A&nbsp;value&nbsp;that&nbsp;may&nbsp;change&nbsp;without&nbsp;the&nbsp;intervention&nbsp;of&nbsp;software&nbsp;is&nbsp;said&nbsp;to&nbsp;be&nbsp;v&nbsp;<br />
olatile.&nbsp;For&nbsp;example,&nbsp;values&nbsp;within&nbsp;the&nbsp;registers&nbsp;of&nbsp;some&nbsp;I/O&nbsp;devices&nbsp;may&nbsp;ch&nbsp;<br />
ange&nbsp;in&nbsp;response&nbsp;to&nbsp;external&nbsp;events.&nbsp;C&quot;s&nbsp;volatile&nbsp;keyword&nbsp;should&nbsp;be&nbsp;used&nbsp;to&nbsp;&nbsp;<br />
warn&nbsp;your&nbsp;compiler&nbsp;about&nbsp;any&nbsp;pointers&nbsp;that&nbsp;point&nbsp;to&nbsp;such&nbsp;registers.&nbsp;This&nbsp;wil&nbsp;<br />
l&nbsp;ensure&nbsp;that&nbsp;the&nbsp;actual&nbsp;value&nbsp;is&nbsp;reread&nbsp;each&nbsp;time&nbsp;the&nbsp;data&nbsp;is&nbsp;used.&nbsp;<br />
一个可能不需要软件的的干涉就可改变的值被叫作动态。例如：在一些I/O设备的寄存器&nbsp;<br />
的值可能在响应外部事件时被改变。C语言中的volatile关键字被用来警告你的编译器那&nbsp;<br />
是一个指向一些寄存器的指针，请不要优化它。这个将确认在数据使用中的每一时间实&nbsp;<br />
际的值是要重新读入的。&nbsp;<br />
W&nbsp;<br />
watchdog&nbsp;timer（看门狗定时器）&nbsp;<br />
A&nbsp;hardware&nbsp;timer&nbsp;that&nbsp;is&nbsp;periodically&nbsp;reset&nbsp;by&nbsp;software.&nbsp;If&nbsp;the&nbsp;software&nbsp;cra&nbsp;<br />
shesor&nbsp;hangs,&nbsp;the&nbsp;watchdog&nbsp;timer&nbsp;will&nbsp;expire,&nbsp;and&nbsp;the&nbsp;entire&nbsp;system&nbsp;will&nbsp;be&nbsp;&nbsp;<br />
reset&nbsp;automatically.&nbsp;<br />
一种由软件定时重设的硬件定时器。如果软件被破坏而挂起，看门狗定时器将超时，整&nbsp;<br />
个系统将自动重启。&nbsp;<br />
&nbsp;<br />
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