PIC16C54C為8位單片機,指令字長12位,全部指令都是單字節指令,系統為哈佛結構,數據總線和程序總線各自獨立分開,數據總線寬度為8位,程序總線寬度為12位,內部程序存儲器為512×12位,內部數據寄存器為32×8位。 PIC16C54C有12根雙向可獨立編程I/O引腳,分為PortA和PortB兩個端口,其中PortA為RA0~RA3,PortB為RB0~RB7,每根I/O引腳可由程序來編程決定其輸入輸出方向。 PIC16C54C提供四種可選振蕩方式: - RC,低成本的阻容振蕩方式 - XT,標準晶體/陶瓷振蕩 - HS,高速晶體/陶瓷振蕩 - LP,低功耗,低頻晶體振蕩 更多鎖相環知識請訪問 http://www.elecfans.com/zhuanti/PLL.html
上傳時間: 2013-12-23
上傳用戶:dianxin61
摘要! 就如何使用單片機對旋轉增量編碼器鑒相進行了研究! 給出了常用的鑒相算法以及識 別"毛刺#的方法!并通過在!AVR單片機上編程驗證了所給出的鑒相方法$ 更多編碼器知識請訪問http://www.elecfans.com/zhuanti/20111111242149.html
上傳時間: 2013-11-16
上傳用戶:wojiaohs
實用單片機系統是基于MCU8051硬件平臺下開發的一款操作平臺,它不是一個操作系統,而是一個操作平臺,主要借鑒了操作系統、手機的一些概念,比如消息機制、系統時鐘、軟件定時器、平臺等概念。 實用單片機系統的核心理念是:在一個標準化的硬件基礎上(如8051,avr,arm等)擴展一個標準化的軟件平臺,把常規項目常用的一些功能如串口通訊、串口調試、系統定時器、軟件定時器、按鍵界面處理等通過消息機制組織起來,形成一個完整的系統。當一個特定的項目需要增加或者刪除一項具體的功能時,只需要在平臺上增加或者去掉相應的功能即可,這樣項目不需要每次重新構思架構,也不需要從零開始,并且原有的系統通過各個項目沉淀后,更加穩定可靠,這就是平臺的概念,它不是各個子函數的集合。 相對于現在的很多人把RTOS操作系統應用于MCU來說,往往只為了實現任務的調度轉換而不考慮功能的實用、易用性,此外因其較高的資源占用性導致其不適合在MCU類低資源的嵌入式平臺應用,MS系統相對于這些RTOS來說,首先還是保留了編程者的常規前后臺思維,但又加了一些RTOS的優點,如軟件定時器實現的時間片任務系統,類似RTOS的任務,其次為編程者實現了整個程序的框架和一些常用的函數及接口功能如按鍵、串口、時鐘等,讓編程者把精力放在跟項目相關的地方,甚至不需要關心所用MCU的寄存器配置,再次就是代碼非常簡單,容易學習,尤其是建議大家采用SourceInsight查看程序,遠比keil編輯器的功能強,它是C語言下最好的編輯器。而MS3.21版本,建議大家直接在Keil的軟件仿真器下運行學習。 MS資料可以從以下網址下載:http://www.study-bbs.com/thread-46471-1-1.html讀者有什么疑問也可以在這個版面提問,作者將盡力解釋。目前MS3.21版本增加了一個GUI操作框架,相比目前已有的GUI更加簡單易懂,利用一個函數指針代替了復雜的狀態機,每一個界面由一個界面建立函數和一個執行函數構成即可。
上傳時間: 2013-10-29
上傳用戶:txfyddz
教你寫Makefile 什么是makefile?或許很多Winodws的程序員都不知道這個東西,因為那些Windows的IDE都為你做了這個工作,但我覺得要作一個好的和professional的程序員,makefile還是要懂。這就好像現在有這么多的HTML的編輯器,但如果你想成為一個專業人士,你還是要了解HTML的標識的含義。特別在Unix下的軟件編譯,你就不能不自己寫makefile了,會不會寫makefile,從一個側面說明了一個人是否具備完成大型工程的能力。
標簽: Makefile
上傳時間: 2013-10-12
上傳用戶:zhoujunzhen
中文版詳情瀏覽:http://www.elecfans.com/emb/fpga/20130715324029.html Xilinx UltraScale:The Next-Generation Architecture for Your Next-Generation Architecture The Xilinx® UltraScale™ architecture delivers unprecedented levels of integration and capability with ASIC-class system- level performance for the most demanding applications. The UltraScale architecture is the industr y's f irst application of leading-edge ASIC architectural enhancements in an All Programmable architecture that scales from 20 nm planar through 16 nm FinFET technologies and beyond, in addition to scaling from monolithic through 3D ICs. Through analytical co-optimization with the X ilinx V ivado® Design Suite, the UltraScale architecture provides massive routing capacity while intelligently resolving typical bottlenecks in ways never before possible. This design synergy achieves greater than 90% utilization with no performance degradation. Some of the UltraScale architecture breakthroughs include: • Strategic placement (virtually anywhere on the die) of ASIC-like system clocks, reducing clock skew by up to 50% • Latency-producing pipelining is virtually unnecessary in systems with massively parallel bus architecture, increasing system speed and capability • Potential timing-closure problems and interconnect bottlenecks are eliminated, even in systems requiring 90% or more resource utilization • 3D IC integration makes it possible to build larger devices one process generation ahead of the current industr y standard • Greatly increased system performance, including multi-gigabit serial transceivers, I/O, and memor y bandwidth is available within even smaller system power budgets • Greatly enhanced DSP and packet handling The Xilinx UltraScale architecture opens up whole new dimensions for designers of ultra-high-capacity solutions.
標簽: UltraScale Xilinx 架構
上傳時間: 2013-11-13
上傳用戶:瓦力瓦力hong
中文版詳情瀏覽:http://www.elecfans.com/emb/fpga/20130715324029.html Xilinx UltraScale:The Next-Generation Architecture for Your Next-Generation Architecture The Xilinx® UltraScale™ architecture delivers unprecedented levels of integration and capability with ASIC-class system- level performance for the most demanding applications. The UltraScale architecture is the industr y's f irst application of leading-edge ASIC architectural enhancements in an All Programmable architecture that scales from 20 nm planar through 16 nm FinFET technologies and beyond, in addition to scaling from monolithic through 3D ICs. Through analytical co-optimization with the X ilinx V ivado® Design Suite, the UltraScale architecture provides massive routing capacity while intelligently resolving typical bottlenecks in ways never before possible. This design synergy achieves greater than 90% utilization with no performance degradation. Some of the UltraScale architecture breakthroughs include: • Strategic placement (virtually anywhere on the die) of ASIC-like system clocks, reducing clock skew by up to 50% • Latency-producing pipelining is virtually unnecessary in systems with massively parallel bus architecture, increasing system speed and capability • Potential timing-closure problems and interconnect bottlenecks are eliminated, even in systems requiring 90% or more resource utilization • 3D IC integration makes it possible to build larger devices one process generation ahead of the current industr y standard • Greatly increased system performance, including multi-gigabit serial transceivers, I/O, and memor y bandwidth is available within even smaller system power budgets • Greatly enhanced DSP and packet handling The Xilinx UltraScale architecture opens up whole new dimensions for designers of ultra-high-capacity solutions.
標簽: UltraScale Xilinx 架構
上傳時間: 2013-11-21
上傳用戶:wxqman
基于VHDL的FPGA和Nios II 實例精煉【作者:劉福奇;出版社:北京航空航天大學出版社】(本書優酷視頻地址:http://www.youku.com/playlist_show/id_5882081.html) 內容簡介:本書分為4個部分:Quartus Ⅱ軟件的基本操作、VHDL語法介紹、FPGA設計實例和Nios Ⅱ設計實例;總結了編者幾年來的FPGA設計經驗,力求給初學者或是想接觸這方面知識的讀者提供一種快速入門的方法;適合電子相關專業的大學生、FPGA的初學者以及對FPGA有興趣的電子工程師。初學者可以按照步驟學習。本書中提及到時間計算問題,不光提出有時間戳的方法, 還介紹了一種通過讀取定時器的寄存器來計算時間的方法。其實,有人認為,本書最好的部分是:DMA的實現說明(本書從3個方面講述了DMA的使用)。現在學習Verilog HDL的人或許比較多,但是用VHDL的人可以學習下,這本書還是很不錯的。
上傳時間: 2014-07-10
上傳用戶:米米陽123
LineWatcher dials your ISP, keeps your connection alive and logs errors. Originally distributed as freeware, this program counts over 10.000 downloads since its first release in 2001. See home page http://www.reseau.org/linewatcher/index.html
標簽: your LineWatcher distributed connection
上傳時間: 2015-01-10
上傳用戶:songyue1991
This simple SDI Notepad-like application demonstrates how, taking advantage of the MFC support for Unicode, to Turkmenize labels of the specified menu items. Actually, Turkmen is not supported by Windows 2000, therefore, to create such resources as menu so that strings in Turkmen could be displayed I had to invent an additional technique 這是一個與記事本類似的簡單的SDI應用程序,演示了怎樣使用MFC來支持 Unicode,對指定的菜單條目進行Turkmenize標簽化。實際上,Windwos 2000并不支持Turknen,因此,創建了那些菜單資源以便那些字符串可以在Turknen中顯示,為此我必須開發其它的技術。 來源: http://www.codeguru.com/advancedui/SDI_Note.html
標簽: Notepad-like demonstrates application advantage
上傳時間: 2013-11-26
上傳用戶:txfyddz
I have written this article to capture a Windows image into a bitmap file that will support all PaintBrush tools and Thumbnail Views of Windows Explorer. I have found many programmers suffering from this problem, including me, until I wrote this article. 捕獲一個窗口圖像并存入一個支持MS畫筆的位圖文件中 我寫的這篇文章介紹了捕獲一個窗口圖像并存入一個支持所有畫筆和Windows Explorer的位圖文件中。 我發現許多程序員因這個問題而煩惱,包括我在內,直到我寫了這篇文章。 來源: http://www.codeguru.com/bitmap/WndToBmpFile.html
標簽: article Windows capture written
上傳時間: 2015-01-10
上傳用戶:hzy5825468