針對船舶氣象儀保障維修而設(shè)計的船舶氣象儀測試系統(tǒng)，包括信息處理終端、主儀器檢測模塊、傳感器檢測模塊，各個模塊都采用基于AVR單片機的嵌入式系統(tǒng)，模塊之間通過CAN總線進行通信。結(jié)果表明，船舶氣象儀測試系統(tǒng)能夠快速檢測船舶氣象儀故障，與單純依靠人工方式排查故障相比，故障檢測時間縮短了60%以上。 Abstract: The test system of ship meteorological instrument was developed to satisfy the maintenance of ship meteorological instruments，which composed of information proCessing terminal， testing module of main instrument and testing module of sensors. Each of these modules included an embedded system based on microcontroller of AVR series and communicated with other module by CAN bus. The results show that the test system can judge the fault of ship meteorological instrument quickly and shorten the fault detection time as much as 60% compared with simple manual troubleshooting.
標(biāo)簽： AVR 單片機 氣象儀 測試系統(tǒng)
上傳時間： 2013-11-23
上傳用戶：stvnash
隨著單片機功能集成化的發(fā)展，其應(yīng)用領(lǐng)域也逐漸地由傳統(tǒng)的控制，擴展為控制處理、數(shù)據(jù)處理以及數(shù)字信號處理（DSP，Digital Signal proCessing）等領(lǐng)域。凌陽的16位單片機就是為適應(yīng)這種發(fā)展而設(shè)計的。它的CPU內(nèi)核采用凌陽最新推出的µ’nSP™（Microcontroller and Signal Processor）16位微處理器芯片（以下簡稱µ’nSP™）。圍繞µ’nSP™所形成的16位µ’nSP™系列單片機（以下簡稱µ’nSP™家族）采用的是模塊式集成結(jié)構(gòu)，它以µ’nSP™內(nèi)核為中心集成不同規(guī)模的ROM、RAM和功能豐富的各種外設(shè)接口部件。
上傳時間： 2013-11-07
上傳用戶：wpwpwlxwlx
This application note describes how to decode standard DTMF tones using the minimum number of external discrete components and a PIC. The two examples use a PIC which has an 8 bit timer and either a comparator or an ADC, although it can be modified for use on a PIC which has only digital I/O. The Appendices have example code for the 16C662 (with comparator) and 16F877 (using the ADC). As the majority of the Digital Signal proCessing is done in software, little is required in the way of external signal conditioning. Software techniques are used to model the individual elements of a DTMF Decoder IC.
標(biāo)簽： Decoding DTMF with PIC
上傳時間： 2013-11-21
上傳用戶：zhaoke2005
SPCE061A采用的內(nèi)核 SPCE061A采用的內(nèi)核（CPU）為μ‘nSP。 μ‘nSP（讀做micro-n-S-P）是凌陽科技推出的16位微處理器，它的突出特點是較高的處理速度，這就使其有能力進行復(fù)雜的數(shù)字信號處理（DSP，Digital Signal proCessing）。 μ‘nSP內(nèi)核由凌陽自主開發(fā)，因而也具備它自己的指令系統(tǒng)。 指令系統(tǒng).61 3.1 指令系統(tǒng)的概述及符號約定.61 3.2 數(shù)據(jù)傳送指令62 3.3 算術(shù)運算..66 3.3.1 加法運算..67 3.3.2 減法運算..68 3.3.3 帶進位的加減運算.70 3.3.4 取補運算..70 3.3.5 SPCE061A的乘法指令.71 3.3.6 SPCE061A的n項內(nèi)積運算指令.71 3.3.7 比較運算(影響標(biāo)志位N,Z,S,C)..73 3.4 SPCE061A的邏輯運算.74 3.4.1 邏輯與..74 3.4.2 邏輯或..75 3.4.3 邏輯異或..76 3.4.4 測試（TEST）.78 3.4.5 SPCE061A的移位操作.80 3.5 SPCE061A的控制轉(zhuǎn)移類指令..83 3.6 偽指令86 3.6.1 偽指令的語法格式及特點..87 3.6.2 偽指令符號約定..87 3.6.3 標(biāo)準(zhǔn)偽指令.87 3.6.4 宏定義與調(diào)用98 3.6.5 段的定義與調(diào)用101 3.6.6 結(jié)構(gòu)的定義與調(diào)用..102 3.6.7 過程的定義與調(diào)用..106 3.6.8 偽指令的應(yīng)用舉例..106
標(biāo)簽： SPCE 061A 061 指令系統(tǒng)
上傳時間： 2013-10-31
上傳用戶：xuanchangri
數(shù)據(jù)處理與控制策略Data proCessing & Control Strategy數(shù)字控制器的設(shè)計技術(shù),數(shù)字濾波和數(shù)據(jù)處理,數(shù)控技術(shù)基礎(chǔ),數(shù)字PID控制算法常規(guī)控制方案,先進控制方案,計算機控制系統(tǒng)的設(shè)計是指在給定系統(tǒng)性能指標(biāo)的條件下，設(shè)計出控制器的控制規(guī)律和相應(yīng)的數(shù)字控制算法 大多數(shù)計算機控制系統(tǒng)是由處理數(shù)字信號的過程控制計算機和連續(xù)的被控過程組成的數(shù)字信號與連續(xù)信號并存的“混合系統(tǒng)” 數(shù)字控制器的分析和設(shè)計方法數(shù)字控制器的連續(xù)化設(shè)計技術(shù)數(shù)字控制器的離散化設(shè)計技術(shù)
標(biāo)簽： 數(shù)據(jù)處理 控制策略
上傳時間： 2013-10-30
上傳用戶：yanming8525826
基于多點網(wǎng)絡(luò)的水廠自動監(jiān)控系統(tǒng)設(shè)計Design of MPI Based Automatic Monitoring and Control System in Water Works劉 美 俊(湖南工程學(xué)院，湘潭411101)摘要針對水廠工作水泵多、現(xiàn)場離控制站距離遠的特點，提出了一種基于MPI多點網(wǎng)絡(luò)的自動監(jiān)控系統(tǒng)的設(shè)計方法，分析了系統(tǒng)的工作原理，介紹了系統(tǒng)中數(shù)據(jù)的采集與處理、主站與從站的通信原理以及系統(tǒng)軟件的設(shè)計。由于這種系統(tǒng)的主、從站PLC之間采用MPI網(wǎng)絡(luò)通信，具有運行可靠、性能價格比高的特點，所以適用于中小規(guī)模水廠的分布式監(jiān)控場合。關(guān)鍵詞多點網(wǎng)絡(luò)主站從站監(jiān)控系統(tǒng)Abstract Ina ccordancew ithth efe atuersof w aterw orks,i. e. ，manyp umpsin o perationa ndth ep umps， farfor mt hec ontrolst ation,th em ethodo fdesigninga na utomati(〕monitoringa ndc ontorlsy stemb asedo nM PIis p resented.Th eo perationalpr incipleo fth esy stemi san alyzed,th ed atac olection,data proCessing; communication between master station and slave station as wel as design and system software are discussed. Because MPI network communicationis used among master station, slave stations and PLC, the system is reliable and high cost-efective. It is， suitable for smal and mediumsized water works for distrbuted monitoring and control.Keywords MPI Masterst ation Slaves tation Monitoringa ndc ontorlsy stem 自來 水 廠 的自動控制系統(tǒng)一般分為兩大部分，一對組態(tài)硬件要求較高，投資較大。相對而言，MPI網(wǎng)是水源地深水泵的工作控制，一是水廠區(qū)變頻恒壓供絡(luò)速度可達187.5 M bps，通過一級中繼器傳輸距離可水控制，兩部分的實際距離通常都比較遠。某廠水源達Ikm 。根據(jù)水廠的具體情況，確定以MPI方式組地有3臺深井泵給水廠區(qū)的蓄水池供水。水廠區(qū)的成網(wǎng)絡(luò)，主站PLC為S7-300系列的CPU3121FM，從任務(wù)是對水池的水進行消毒處理后，通過加壓泵向管站為S7-200系列的CPU222。這樣既滿足了系統(tǒng)要路恒壓供水。選用Siemens公司的S7系列可編程控求，又相對于Profibus網(wǎng)絡(luò)節(jié)省了三分之一的成本，制器(PLC)和上位機組成實時數(shù)據(jù)采集和監(jiān)控系統(tǒng)， 這種分布式監(jiān)控系統(tǒng)具有較高的性能價格比。系統(tǒng)對深水泵進行遠程控制，對供水泵采用變頻器進行恒中PLC的物理層采用RS - 485接口，網(wǎng)絡(luò)延伸選用壓控制以保證整個水廠的電機設(shè)備安全、可靠地運帶防雷保護的中繼器，使系統(tǒng)的安全運行得到了保行。證。MPI網(wǎng)絡(luò)的拓?fù)浣Y(jié)構(gòu)如圖1所示。1 多點網(wǎng)絡(luò)(NWI)監(jiān)控系統(tǒng)的組成Sie me ns 公司S7系列PLC通常有MP」多點網(wǎng)絡(luò)與Profibus現(xiàn)場總線網(wǎng)絡(luò)兩種組網(wǎng)方式。Profibus現(xiàn)場總線的應(yīng)用目前較為普遍，通用性較好，它由Profibus一DP, Profibus一FMS, Profibus一PA組成。Profibus - DP型用于分散外設(shè)間的數(shù)據(jù)傳輸，傳輸速率為9.6kbps一12Mbps，主要用于現(xiàn)場控制器與分散1/0之間的通信，可滿足交直流調(diào)速系統(tǒng)快速響應(yīng)的時間要求，特別適合于加工自動化領(lǐng)域的應(yīng)用;Profibus - FMS主要解決車間級通信問題，完成中等傳輸速度的循環(huán)或非循環(huán)數(shù)據(jù)交換任務(wù)，適用于紡織、樓宇自動化、可編程控制器、低壓開關(guān)等;Profibus - PA型采用了OSI模型的物理層和數(shù)據(jù)鏈路層，適用于過程自動化的總線類型。
標(biāo)簽： 多點 網(wǎng)絡(luò) 系統(tǒng)設(shè)計 自動監(jiān)控
上傳時間： 2013-10-09
上傳用戶：fac1003
Abstract: This reference design explains how to power the Xilinx Zynq Extensible proCessing Platform (EPP) and peripheral ICs using
上傳時間： 2014-01-21
上傳用戶：haohao
This application note shows how to achieve low-cost, efficient serial configuration for Spartan FPGA designs. The approachrecommended here takes advantage of unused resources in a design, thereby reducing the cost, part count, memory size,and board space associated with the serial configuration circuitry. As a result, neither processor nor PROM needs to be fullydedicated to performing Spartan configuration.In particular, information is provided on how the idle proCessing time of an on-board controller can be used to loadconfiguration data from an off-board source. As a result, it is possible to upgrade a Spartan design in the field by sending thebitstream over a network.
標(biāo)簽： Spartan XAPP FPGA 098
上傳時間： 2014-08-16
上傳用戶：adada
The introduction of Spartan-3™ devices has createdmultiple changes in the evolution of embedded controldesigns and pushed proCessing capabilities to the “almostfreestage.” With these new FPGAs falling under $20, involume, with over 1 million system gates, and under $5for 100K gate-level units, any design with programmablelogic has a readily available 8- or 16-bit processor costingless than 75 cents and 32-bit processor for less than $1.50.
上傳時間： 2013-12-10
上傳用戶：zgu489
WP369可擴展式處理平臺-各種嵌入式系統(tǒng)的理想解決方案 ：Delivering unrivaled levels of system performance,flexibility, scalability, and integration to developers,Xilinx's architecture for a new Extensible proCessing Platform is optimized for system power, cost, and size. Based on ARM's dual-core Cortex™-A9 MPCore processors and Xilinx’s 28 nm programmable logic,the Extensible proCessing Platform takes a processor-centric approach by defining a comprehensive processor system implemented with standard design methods. This approach provides Software Developers a familiar programming environment within an optimized, full featured,powerful, yet low-cost, low-power proCessing platform.
上傳時間： 2013-10-22
上傳用戶：685
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