FeaturesThe following standard features are provided.• Choice of RTOS scheduling policy1. Pre-emptive:Always runs the highest available task. Tasks of identical priorityshare CPU time (fully pre-emptive with round robin time slicing).2. Cooperative:Context switches only occur if a task blocks, or explicitly callstaskYIELD().• Co-routines (light weight tasks that utilise very little RAM).• Message queues• Semaphores [via macros]• Trace visualisation ability (requires more RAM)• Majority of source code common to all supported development tools• Wide range of ports and examples
上傳時(shí)間： 2013-10-13
上傳用戶：13162218709
單片機(jī)系統(tǒng)“PC”失控的軟件措施Software Measure of GettingO uto fC ontrolfo r“PC"in S ingleC hipC omputerS ystem謐 加 春 王 曉 基 雷 小 華(江 西 理 工 大 學(xué)機(jī) 電 工 程 學(xué) 院 ，贛 州 34 10 00)摘要單片機(jī)系統(tǒng)在實(shí)際工業(yè)現(xiàn)場(chǎng)中可能遇到各種干擾和自身的隨機(jī)性故障?，F(xiàn)場(chǎng)惡劣的環(huán)境有可能使計(jì)算機(jī)系統(tǒng)發(fā)生異常，計(jì)算機(jī)程序指針“PC”失控就是常見的故障之一，如果發(fā)生“PC”失控，將導(dǎo)致CPI工作混亂，釀成嚴(yán)重的事故。研究了“PC”失控的原因，并指出軟件抗干擾的幾種方法，有效保證單片機(jī)系統(tǒng)的正常工作。關(guān)鍵詞單片機(jī)“PC”失控抗干擾Abstract Inp racticalin dustrialfi elds,th ereis v ariousin terferencea fectingo perationo fsi nglec hipc omputersy stemsa ndt hec omputersy stems。fac噸random faults飾themselves. It is very common that the severe environment makes the computer systems abnormal. The program counter "PC"gettingo utof co ntorlis on eo fth ec ommonfa ults.If th isoc curs,C PUw ouldb eru nningo utof or deran din torducesse riousan cient.T hec ausesof " PC"geting out of control， studied in this paper and some countermeasures of anti-interference師software are given to ensure single chip computer systemworking properly.Keywords Single。飾computer Porgramc ounter"P C" Anti-interfeernc 在設(shè) 計(jì) 和 開發(fā)單片機(jī)系統(tǒng)時(shí)，一般難以周全地預(yù)計(jì)單片機(jī)系統(tǒng)在實(shí)際工業(yè)現(xiàn)場(chǎng)中可能遇到的各種干擾和自身的隨機(jī)性故障。因此，除了采取防止和抑制干擾的各項(xiàng)措施外，還應(yīng)該借助于軟件措施克服某些干擾，系統(tǒng)還應(yīng)具備迅速自行恢復(fù)的能力。本文介紹的應(yīng)對(duì)單片機(jī)系統(tǒng)PC失控的軟件措施，設(shè)計(jì)靈活，節(jié)省硬件資源，能保證測(cè)控系統(tǒng)長(zhǎng)期可靠地運(yùn)行。MC S- 5 1單片機(jī)以其優(yōu)良的性能價(jià)格比大量應(yīng)用于工業(yè)現(xiàn)場(chǎng)測(cè)試和控制領(lǐng)域。但是，現(xiàn)場(chǎng)惡劣的環(huán)境有可能使計(jì)算機(jī)系統(tǒng)發(fā)生異常，計(jì)算機(jī)程序指針PC失控就是常見的故障之一，一旦發(fā)生PC“走飛”，計(jì)算機(jī)系統(tǒng)就會(huì)出現(xiàn)工作混亂，釀成嚴(yán)重的事故。為 了 在 CP 失控時(shí)盡量減少由此帶來(lái)的不利影響，并盡快使系統(tǒng)恢復(fù)正常，需要采取一定的軟件措施和硬件措施。常見的硬件措施有“看門狗”電路。軟件措施設(shè)置的前提條件是:①在干擾作用下，微機(jī)系統(tǒng)硬件部分不會(huì)受到任何損壞，或者損壞部分設(shè)置有監(jiān)測(cè)狀態(tài)可供查詢;②程序區(qū)不會(huì)受到干擾侵害。單片機(jī)系統(tǒng)的程序和表格以及重要的參數(shù)均設(shè)置在ROM區(qū)，不會(huì)因干擾的侵人而改變;③ RAM區(qū)中的重要數(shù)據(jù)不會(huì)被破壞，或者雖然被破壞，但是可以重新建立。
標(biāo)簽： 單片機(jī)系統(tǒng) 軟件
上傳時(shí)間： 2013-11-02
上傳用戶：bhqrd30
1 /**————————————————————2 〖說(shuō)明〗I2C總線驅(qū)動(dòng)程序(用兩個(gè)普通IO模擬I2C總線)3 包括100Khz(T=10us)的標(biāo)準(zhǔn)模式(慢速模式)選擇，4 和400Khz(T=2.5us)的快速模式選擇，5 默認(rèn)11.0592Mhz的晶振。6 〖文件〗PCF8563T.C ﹫2001/11/2 77 〖作者〗龍嘯九天 c51@yeah.net http://www.c51bbs.co /8 〖修改〗修改建議請(qǐng)到論壇公布 http://www.c51bbs.co m9 〖版本〗V1.00A Build 080310 —————————————————————*/1112 #ifndef SDA13 #define SDA P0_014 #define SCL P0_115 #endif1617 extern uchar SystemError;1819 #define uchar unsigned char20 #define uint unsigned int21 #define Byte unsigned char22 #define Word unsigned int23 #define bool bit24 #define true 125 #define false 02627 #define SomeNOP(); _nop_();_nop_();_nop_();_nop_();2829 /**--------------------------------------------------------------------------------30 調(diào)用方式：void I2CStart(void) ﹫2001/07/0 431 函數(shù)說(shuō)明：私有函數(shù)，I2C專用32 ---------------------------------------------------------------------------------*/33 void I2CStart(void)34 {35 EA=0;36 SDA=1; SCL=1; SomeNOP();//INI37 SDA=0; SomeNOP(); //START38 SCL=0;39 }4041 /**--------------------------------------------------------------------------------42 調(diào)用方式：void I2CStop(void) ﹫2001/07/0 443 函數(shù)說(shuō)明：私有函數(shù)，I2C專用44 ---------------------------------------------------------------------------------*/45 void I2CStop(void)46 {47 SCL=0; SDA=0; SomeNOP(); //INI48 SCL=1; SomeNOP(); SDA=1; //STOP49 EA=1;50 }5152 /**--------------------------------------------------------------------------------53 調(diào)用方式：bit I2CAck(void) ﹫2001/07/0 454 函數(shù)說(shuō)明：私有函數(shù)，I2C專用，等待從器件接收方的應(yīng)答55 ---------------------------------------------------------------------------------*/56 bool WaitAck(void)57 {58 uchar errtime=255;//因故障接收方無(wú)ACK，超時(shí)值為255。59 SDA=1;SomeNOP();60 SCL=1;SomeNOP();61 while(SDA) {errtime--; if (!errtime) {I2CStop();SystemError=0x11;return false;}}62 SCL=0;63 return true;
標(biāo)簽： I2C 總線 驅(qū)動(dòng)程序
上傳時(shí)間： 2014-04-11
上傳用戶：xg262122
摘 要: 針對(duì)三峽水輪機(jī)葉片坑內(nèi)移動(dòng)式修焊機(jī)器人的作業(yè)過(guò)程測(cè)控問(wèn)題, 研制了一種基于雙數(shù)字信號(hào)處理器的嵌入式視覺反饋控制系統(tǒng)。 采用功能單元模塊化設(shè)計(jì)思想和疊層積木式裝配結(jié)構(gòu), 該系統(tǒng)將基于TM S320DM 642 的圖像采集與處理、 基于TM S320L F2812 的運(yùn)動(dòng)控制與參數(shù)調(diào)整、 數(shù)字視頻輸入、 模擬視頻輸入、 模擬視頻輸出、 數(shù)字視頻輸出、 電源變換等功能模塊集成在170mm×57mm×40mm 的空間尺寸內(nèi)。該系統(tǒng)可以安裝在移動(dòng)式修復(fù)機(jī)器人上、 脫離工控機(jī)獨(dú)立工作, 適用于M IG、T IG、CO 2 等多種焊接工藝方法的過(guò)程監(jiān)控、 焊縫跟蹤和焊縫成形實(shí)時(shí)控制。 關(guān)鍵詞: 移動(dòng)式修焊機(jī)器人; 雙數(shù)字信號(hào)處理器嵌入式系統(tǒng); 視覺反饋控制
標(biāo)簽： DSP 移動(dòng) 焊 機(jī)器人
上傳時(shí)間： 2013-10-08
上傳用戶：xinhaoshan2016
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(biāo)簽： UltraScale Xilinx 架構(gòu)
上傳時(shí)間： 2013-11-13
上傳用戶：瓦力瓦力hong
Prakash Rashinkar has over 15 years experience in system design and verificationof embedded systems for communication satellites, launch vehicles and spacecraftground systems, high-performance computing, switching, multimedia, and wirelessapplications. Prakash graduated with an MSEE from Regional Engineering College,Warangal, in India. He lead the team that was responsible for delivering themethodologies for SOC verification at Cadence Design Systems. Prakash is anactive member of the VSIA Functional Verification DWG. He is currently Architectin the Vertical Markets and Design Environments Group at Cadence.
上傳時(shí)間： 2014-01-24
上傳用戶：xinhaoshan2016
The LogiCORE™ GTP Wizard automates the task of creating HDL wrappers to configure the high-speed serial GTP transceivers in Virtex™-5 LXT and SXT devices. The menu-driven interface allows one or more GTP transceivers to be configured using pre-definedtemplates for popular industry standards, or from scratch, to support a wide variety of custom protocols.The Wizard produces a wrapper, an example design, and a testbench for rapid integration and verification of the serial interface with your custom function Features• Creates customized HDL wrappers to configureVirtex-5 RocketIO™ GTP transceivers• Users can configure Virtex-5 GTP transceivers toconform to industry standard protocols usingpredefined templates, or tailor the templates forcustom protocols• Included protocol templates provide support for thefollowing specifications: Aurora, CPRI, FibreChannel 1x, Gigabit Ethernet, HD-SDI, OBSAI,OC3, OC12, OC48, PCI Express® (PCIe®), SATA,SATA II, and XAUI• Automatically configures analog settings• Each custom wrapper includes example design, testbench; and both implementation and simulation scripts
標(biāo)簽： Transceiver Virtex Wizar GTP
上傳時(shí)間： 2013-10-23
上傳用戶：leyesome
提出一種融合Ad hoc網(wǎng)絡(luò)、GPRS/GSM和PSTN的遠(yuǎn)程分布式環(huán)境狀況實(shí)時(shí)監(jiān)測(cè)系統(tǒng)設(shè)計(jì)方案。由IEEE 802.15.4標(biāo)準(zhǔn)組建的Ad hoc無(wú)線傳感器網(wǎng)絡(luò)負(fù)責(zé)監(jiān)測(cè)環(huán)境溫濕度、光照度、煤氣及CO濃度等；采用GPRS/GSM模塊和嵌入式Modem構(gòu)造無(wú)線網(wǎng)關(guān)，實(shí)現(xiàn)Ad hoc網(wǎng)絡(luò)與GPRS/GSM和PSTN的無(wú)縫連接，將無(wú)線傳感器網(wǎng)絡(luò)采集的數(shù)據(jù)發(fā)送到手機(jī)或遠(yuǎn)端計(jì)算機(jī)。系統(tǒng)具有小、遠(yuǎn)和散的特點(diǎn)，可實(shí)現(xiàn)多點(diǎn)分布、中央管理、多層報(bào)警和遠(yuǎn)程監(jiān)測(cè)。
標(biāo)簽： 多網(wǎng)融合 環(huán)境 實(shí)時(shí)監(jiān)測(cè) 遠(yuǎn)程
上傳時(shí)間： 2013-11-08
上傳用戶：semi1981
致力于提供高速信號(hào)處理解決方案的北京拓目科技有限公司（Beijing Topmoo Tech Co. Ltd）在2011年推出基于FLASH陣列存儲(chǔ)的高端固態(tài)存儲(chǔ)產(chǎn)品TMS-F231-160G之后，近日宣布推出其入門級(jí)固態(tài)存儲(chǔ)產(chǎn)品TMS-S231-512G。 在容量選擇上，TMS-F231-160G可以通過(guò)更換PIN2PIN的FLASH芯片而達(dá)到擴(kuò)容目的,但是SLC FLASH成本高居不下，在目前高速發(fā)展的工業(yè)相機(jī)領(lǐng)域，難以推廣普及。為了推動(dòng)高速工業(yè)相機(jī)存儲(chǔ)市場(chǎng)的發(fā)展，拓目科技發(fā)布了基于SATA接口的SSD盤存儲(chǔ)系統(tǒng)TMS-S231-512G，隨著消費(fèi)電子的發(fā)展，SSD的單盤容量不斷的擴(kuò)大，價(jià)格不斷的降低，必然能使TMS-S231-512G得到廣泛的應(yīng)用。 “TMS-S231-512G是一款專門針對(duì)航空拍攝、工業(yè)照相、汽車碰撞實(shí)驗(yàn)等需要高速圖像采集、存儲(chǔ)的場(chǎng)合而開發(fā)的固態(tài)存儲(chǔ)設(shè)備”拓目科技產(chǎn)品經(jīng)理Lemon Chan介紹道，“該產(chǎn)品的單盤存儲(chǔ)容量最高可達(dá)512GB，單盤存儲(chǔ)帶寬則最高可達(dá)250MB/s，在該帶寬支持條件下，TMS-S231-512G最高能支持1280x1024@200fps的連續(xù)拍照模式，幾乎適用于所有需要高速圖像采集的場(chǎng)合”。 “目前，Camera Link接口在航空相機(jī)、工業(yè)相機(jī)等領(lǐng)域得到廣泛應(yīng)用。與此同時(shí)，TMS-S231-512G板載兩個(gè)SFP光纖接口，最高可支持5Gbps的有效數(shù)據(jù)吞吐率?！蓖啬靠萍佳邪l(fā)總監(jiān)Steven Wu介紹道，“除了硬件板卡以外，拓目科技還提供一整套完整的客戶端解決方案，以方便客戶能夠輕易地對(duì)設(shè)備進(jìn)行管控，同時(shí)方便客戶對(duì)記錄下來(lái)的數(shù)據(jù)進(jìn)行預(yù)覽、下載等操作”。 “與國(guó)外同類產(chǎn)品相比，TMS-S231-512G除了大容量、高帶寬等優(yōu)點(diǎn)以外，另一大優(yōu)勢(shì)在于其極強(qiáng)的可定制性。TMS-S231-512G從硬件設(shè)計(jì)到軟件開發(fā)，所有的核心技術(shù)都由拓目科技研發(fā)團(tuán)隊(duì)自主開發(fā)，相比于國(guó)外同類產(chǎn)品，拓目科技無(wú)論在產(chǎn)品的可定制性還是售后技術(shù)支持方面，都具有較大的優(yōu)勢(shì)”Steven Wu補(bǔ)充道。 同時(shí)，該款產(chǎn)品所有器件均采用工業(yè)級(jí)寬溫芯片，溫度、振動(dòng)等環(huán)境適應(yīng)性試驗(yàn)均已順利通過(guò)，能最大程度地保證產(chǎn)品在惡劣環(huán)境下的可靠性。 TMS-S231系列產(chǎn)品特點(diǎn) 1， 采用業(yè)界領(lǐng)先的掉電保護(hù)技術(shù)，令您的數(shù)據(jù)安全無(wú)憂 2， 性能卓越，擁有單盤高達(dá)250MB/s的寫帶寬 3， 單盤64GB~512GB大容量可選，存儲(chǔ)容量大小也可以根據(jù)用戶需求定制 4， 支持Camera Link視頻輸入接口 5， 支持DVI顯示接口 6， 支持SFP光纖接口 7， 支持2個(gè)SSD盤 8， 支持1個(gè)千兆以太網(wǎng)口 9， 滿足各種惡劣環(huán)境應(yīng)用要求，能在高溫度、多灰塵、高海拔、強(qiáng)振動(dòng)等應(yīng)用場(chǎng)合下正常使用 TMS-S231采用12V電源適配器供電，功耗小于10W，TMS-S231集成度非常高，產(chǎn)品體積僅為260mm x 180mm x 45mm，如上圖所示。TMS-S231現(xiàn)已進(jìn)入大批量生產(chǎn)階段并隨時(shí)接受客戶試用申請(qǐng)與訂貨。
上傳時(shí)間： 2013-11-12
上傳用戶：a155166
The main objective of this book is to present all the relevant informationrequired for RF and micro-wave power amplifier design includingwell-known and novel theoretical approaches and practical design techniquesas well as to suggest optimum design approaches effectively combininganalytical calculations and computer-aided design. This bookcan also be very useful for lecturing to promote the analytical way ofthinking with practical verification by making a bridge between theoryand practice of RF and microwave engineering. As it often happens, anew result is the well-forgotten old one. Therefore, the demonstrationof not only new results based on new technologies or circuit schematicsis given, but some sufficiently old ideas or approaches are also introduced,that could be very useful in modern practice or could contributeto appearance of new ideas or schematic techniques.
標(biāo)簽： Amplifier Microwave Design Power
上傳時(shí)間： 2013-12-22
上傳用戶：vodssv
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