與”跳轉到開始代碼”這樣的意思相同。&nbsp;<br />reset&nbsp;vector&nbsp;<br />See&nbsp;reset&nbsp;address.&nbsp;<br />S&nbsp;<br />SRAM（靜態隨機訪問儲存器）&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 />靜態隨機訪問儲存器。一種在系統上電時以保持它的內容的儲存器。當系統斷電或重啟&nbsp;<br />時，保存在SRAM中的內容將丟失。&nbsp;<br />Scheduler（調度程序）&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 />操作系統中決定下一次哪個任務運行的那部分。決定基于每一個任務的就緒，它們的優&nbsp;<br />先級關系，和特殊調度算法的實現。&nbsp;<br />Semaphore（信號燈）&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 />用于進程間同步的數據結構。信號燈常常由操作系統提供。&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 />一種運行在主機上，裝作目標機處理器的調試工具。仿真器一般用來測試嵌入式硬件可&nbsp;<br />用之前的軟件。不幸地，與模擬與復雜地外設進行交互的嘗試常常比它們做到的更差。&nbsp;<br />&nbsp;<br />software&nbsp;interrupt（軟件中斷）&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 />由軟件指令發起的的一個程序的中斷。軟件中斷被用來實現中斷點他操作系統進入點。&nbsp;<br />不象真實的中斷，那些中斷在不防礙程序執行時同步發生。換句話說，軟件中斷常常在&nbsp;<br />指令運行周期的開始發生。&nbsp;<br />Stack（堆棧）&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 />一個包含后進先出隊列的內存區域，用來存儲參數、自動變量、返回地址和其他一些必&nbsp;<br />須在函數調用中進行維護的信息。在多任務情況下，每一個任務一般都有自己的堆棧區&nbsp;<br />。&nbsp;<br />stack&nbsp;frame（堆棧幀）&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 />一個關聯特殊函數調用的堆棧區域。&nbsp;<br />startup&nbsp;code（啟動代碼）&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 />一個匯編語言代碼，它為高級語言寫的軟件準備好運行的前期工作。大多數C/C++交叉編&nbsp;<br />譯器在你可以修改、編譯他連接你的嵌入式程序時與啟動代碼一起來到。&nbsp;<br />T&nbsp;<br />Target（目標機）&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 />嵌入式系統的另一個名字。這個術語常常在軟件開發期間使用，用來區別與嵌入式系統&nbsp;<br />通訊的主機。&nbsp;<br />Task（任務）&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（線程）&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;（跟蹤點）&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 />象中斷點，除了停止程序時，計數器還被增加外。跟蹤點不是被所有的調試工具支持。&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 />一個由處理器內部硬件觸發的程序中斷。例如，處理器可能在一個錯誤的代碼在程序中&nbsp;<br />被發現時陷入。對比軟件中斷。&nbsp;<br />V&nbsp;<br />volatile（動態）&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 />一個可能不需要軟件的的干涉就可改變的值被叫作動態。例如：在一些I/O設備的寄存器&nbsp;<br />的值可能在響應外部事件時被改變。C語言中的volatile關鍵字被用來警告你的編譯器那&nbsp;<br />是一個指向一些寄存器的指針，請不要優化它。這個將確認在數據使用中的每一時間實&nbsp;<br />際的值是要重新讀入的。&nbsp;<br />W&nbsp;<br />watchdog&nbsp;timer（看門狗定時器）&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 />一種由軟件定時重設的硬件定時器。如果軟件被破壞而掛起，看門狗定時器將超時，整&nbsp;<br />個系統將自動重啟。&nbsp;<br />&nbsp;<br />&nbsp;<br />--&nbsp;<br />&nbsp;<br />※&nbsp;來源:·BBS&nbsp;水木清華站&nbsp;smth.edu.cn·[FROM:&nbsp;202.120.53.68]&nbsp;<br /><a href="00000005.htm">上一篇</a><a href="javascript:history.go(-1)">返回上一頁</a><a href="index.htm">回到目錄</a><a href="#top">回到頁首</a></center><center><h1>BBS 水木清華站∶精華區</h1></center></body></html>