The Verilog Hardware Description Language (HDL) is defined in this standard. Verilog HDL is a formal notation intended for use in all phases of the creation of electronic systems. Because it is both machine readable and human readable,it supports the development,verification, synthesis,and testing of hardware designs; the communication of hardware design data; and the maintenance,modification,and procurement of hardware. The primary audiences for this standard are the implementors of tools supporting the language and advanced users of the language.
上傳時(shí)間： 2021-11-09
上傳用戶：
電子書-FA工業(yè)自動(dòng)化設(shè)備設(shè)計(jì)基礎(chǔ)緒 論 一 目的 隨著科學(xué)技術(shù)的發(fā)展以及人們對于產(chǎn)品品質(zhì)的更高追求，越來越多的企業(yè)和 工廠都期望使用大量的自動(dòng)化設(shè)備和裝置來取代工人繁冗無味的重復(fù)勞動(dòng)，實(shí)現(xiàn) 產(chǎn)品的全部或者部分制造過程的自動(dòng)化以消除因?yàn)槿藶橐蛩貙?dǎo)致的產(chǎn)品質(zhì)量的 不穩(wěn)定性，這就是我們通常所說的“工廠自動(dòng)化”（Factory Automation,簡稱： FA）。 本文以及后續(xù)系列篇幅介紹的就是為了實(shí)現(xiàn)工廠自動(dòng)化而做的工業(yè)自動(dòng)化 設(shè)備的設(shè)計(jì)基礎(chǔ)知識(shí)。本系列文章主要面對的對象是：有志于投身機(jī)械設(shè)計(jì)行業(yè) 的，具有基本機(jī)電知識(shí)的大學(xué)生、應(yīng)屆畢業(yè)生以及畢業(yè) 3 年以內(nèi)的初級(jí)設(shè)計(jì)師（助 理設(shè)計(jì)師）。所以本系列文章的主要宗旨是：讓在校大學(xué)生明白學(xué)習(xí)的方向，讓 應(yīng)屆畢業(yè)生能迅速地把學(xué)校學(xué)到的理論知識(shí)正確地應(yīng)用到設(shè)計(jì)實(shí)踐中來，讓助理 設(shè)計(jì)師發(fā)現(xiàn)自己的不足之處。本系列文章不會(huì)解釋設(shè)計(jì)方法學(xué)的問題，凡涉及到 設(shè)計(jì)方法學(xué)的問題，煩請諸位自己查閱相關(guān)資料。比如：自頂向下設(shè)計(jì)、優(yōu)化設(shè) 計(jì)等。所以，在接下來的講解中，本人會(huì)盡量使用簡潔、系列的方式，通俗的語 言列舉我們所要表達(dá)的內(nèi)容，盡量做到不羅嗦、不重復(fù)，盡量減小諸位的閱讀強(qiáng) 度、節(jié)約大家的時(shí)間。所以，我們的口號(hào)是“理論聯(lián)系實(shí)際”。好了，以下咱們 開始進(jìn)入工廠自動(dòng)化設(shè)備的天地中。 注意：本文中所說的自動(dòng)化設(shè)備主要是大量使用了現(xiàn)代自動(dòng)化元器件以及自 動(dòng)化控制系統(tǒng)的各類設(shè)備，與傳統(tǒng)的純機(jī)械機(jī)構(gòu)組成的設(shè)備有一定的區(qū)別。但是， 也不可盲目的崇拜自動(dòng)化元器件和現(xiàn)代控制技術(shù)的能力，傳統(tǒng)的機(jī)械機(jī)構(gòu)仍然是 機(jī)械的主要組成部分；與現(xiàn)代自動(dòng)化器件組成的結(jié)構(gòu)模塊相比較，傳統(tǒng)的機(jī)械機(jī) 構(gòu)具有非常明顯的簡潔、高效的優(yōu)點(diǎn)；所以，在設(shè)備設(shè)計(jì)過程中，只有合理地運(yùn) 用機(jī)構(gòu)和自動(dòng)化元器件、現(xiàn)代控制技術(shù)才有可能設(shè)計(jì)出完美的自動(dòng)化設(shè)備。由于 機(jī)械機(jī)構(gòu)學(xué)在 18 世紀(jì)已經(jīng)發(fā)展成熟，而且在大學(xué)的《機(jī)械原理》課程中有清晰 的闡述，所以，本文會(huì)盡量少的提到機(jī)械原理，涉及到的機(jī)械原理
標(biāo)簽： 工業(yè)自動(dòng)化
上傳時(shí)間： 2022-02-19
上傳用戶：wangshoupeng199
電子書-RTL Design Style Guide for Verilog HDL540頁A FF having a fixed input value is generated from the description in the upper portion of Example 2-21. In this case, ’0’ is output when the reset signal is asynchronously input, and ’1’ is output when the START signal rises. Therefore, the FF data input is fixed at the power supply, since the typical value ’1’ is output following the rise of the START signal. When FF input values are fixed, the fixed inputs become untestable and the fault detection rate drops. When implementing a scan design and converting to a scan FF, the scan may not be executed properl not be executed properly, so such descriptions , so such descriptions are not are not recommended. recommended.[1] As in the lower part of Example 2-21, be sure to construct a synchronous type of circuit and ensure that the clock signal is input to the clock pin of the FF. Other than the sample shown in Example 2-21, there are situations where for certain control signals, those that had been switched due to the conditions of an external input will no longer need to be switched, leaving only a FF. If logic exists in a lower level and a fixed value is input from an upper level, the input value of the FF may also end up being fixed as the result of optimization with logic synthesis tools. In a situation like this, while perhaps difficult to completely eliminate, the problem should be avoided as much as possible.
標(biāo)簽： RTL verilog hdl
上傳時(shí)間： 2022-03-21
上傳用戶：canderile
本文主要介紹如何在Wado設(shè)計(jì)套件中進(jìn)行時(shí)序約束，原文出自 xilinx中文社區(qū)。1 Timing Constraints in Vivado-UCF to xdcVivado軟件相比于sE的一大轉(zhuǎn)變就是約束文件，5E軟件支持的是UcF（User Constraints file，而 Vivado軟件轉(zhuǎn)換到了XDc（Xilinx Design Constraints）。XDC主要基于SDc（Synopsys Design Constraints）標(biāo)準(zhǔn)，另外集成了Xinx的一些約束標(biāo)準(zhǔn)可以說這一轉(zhuǎn)變是xinx向業(yè)界標(biāo)準(zhǔn)的靠攏。Altera從 TimeQuest開始就一直使用SDc標(biāo)準(zhǔn)，這一改變，相信對于很多工程師來說是好事，兩個(gè)平臺(tái)之間的轉(zhuǎn)換會(huì)更加容易些。首先看一下業(yè)界標(biāo)準(zhǔn)SDc的原文介紹：Synopsys widely-used design constraints format, known as sDc, describes the design intent"and surrounding constraints for synthesis, clocking, timing, power, test and environmental and operating conditions. sDc has been in use and evolving for more than 20 years, making it the most popular and proven format for describing design constraints. Essentially all synthesized designs use SDc and numerous EDa companies have translators that can read and process sDc
標(biāo)簽： vivado
上傳時(shí)間： 2022-03-26
上傳用戶：
近年來反季節(jié)種植已成火熱趨勢,溫室大棚的普及十分迅速,而溫室大棚對自動(dòng)化、智能化的要求也越來越迫切,本系統(tǒng)將溫室大棚的溫濕度、二氧化碳濃度各個(gè)方面的檢測,通風(fēng)、澆灌、溫度、噴灑農(nóng)藥等各個(gè)方面的控制進(jìn)行綜合系統(tǒng)研究,實(shí)現(xiàn)溫室大棚對自動(dòng)化、智能化的要求。這一系統(tǒng)是基于單片機(jī)控制的智能檢測,控制系統(tǒng)包含單片機(jī)主控模塊、感應(yīng)檢測模塊、傳感模塊,顯示、控制模塊等[1]。從而提高溫室大棚的種植效率,減少勞動(dòng)力,提高利潤等。In recent years,counter-season planting has become a hot trend featuring the rapid popularization of greenhouse and urgent requirement for the automation and intellectualization of greenhouse.This paper offers a comprehensive and systematic study of the monitoring of temperature,humidity and carbon dioxide concentration in the greenhouse and the control of ventilation,irrigation,temperature and pesticide spraying in order to achieve automation and intellectualization in greenhouse.This system is based on the intelligent detection controlled by single chip computer with the control system including the main control module,induction detection module,sensing module,display and control module of single chip computer,which is effective in improving planting efficiency of greenhouse,reducing labor force and increasing profits.
標(biāo)簽： 智能溫室大棚 控制系統(tǒng)
上傳時(shí)間： 2022-03-27
上傳用戶：
配電網(wǎng)中,各種配電終端的電流、電壓、有功功率及無功功率等模擬量的采集是配電網(wǎng)自動(dòng)化的重要環(huán)節(jié)。這些模擬量的采集也是各種儀器和家用電器的必要功能。因此,設(shè)計(jì)了基于嵌入式STM32F103單片機(jī)的交流電壓、交流電流及有功功率的采集系統(tǒng),通過電壓互感器TV1005M和電流互感器TA1005M分別檢測交流電壓和交流電流值;屏幕或者手機(jī)APP和WiFi模塊互聯(lián)后,可以實(shí)時(shí)顯示交流電壓、交流電流、功率及電量值;通過設(shè)定閾值功率,可以實(shí)現(xiàn)對電流的監(jiān)控和對電路的保護(hù)。In the distribution network,the collection of analog,such as current,voltage,active power,and reactive power at various distribution terminals is a very important part of distribution network automation. These analog acquisitions are also for various instruments and household appliances. Very important technology. Therefore,an AC voltage,AC current and active power acquisition system based on embedded STM32 F103 machine is designed,and AC voltage and AC current values are detected by voltage transformer TV1005 M and current Transformer TA1005 M respectively;After the screen or mobile phone APP and WiFi modules are interconnected,AC voltage,AC current,power,and power values can be displayed in real time;By setting the threshold power,the current can be monitored and the circuit can be protected.
標(biāo)簽： stm32f103 單片機(jī) 電流電壓采集
上傳時(shí)間： 2022-03-27
上傳用戶：shjgzh
針對目前MSP430單片機(jī)實(shí)驗(yàn)裝置較少、實(shí)驗(yàn)內(nèi)容少,而且無MSP430高端產(chǎn)品的實(shí)驗(yàn)裝置,研制了基于MSP430F5529單片機(jī)的綜合實(shí)驗(yàn)裝置,主要包括MSP430 Launch Pad和母板兩部分。較傳統(tǒng)的單片機(jī)實(shí)驗(yàn)裝置增加了模擬電路的設(shè)置,設(shè)計(jì)的實(shí)驗(yàn)?zāi)軌蚶脝纹瑱C(jī)的所有外設(shè),可進(jìn)行模塊基礎(chǔ)實(shí)驗(yàn)和綜合實(shí)驗(yàn)兩大類實(shí)驗(yàn),非常適合自動(dòng)化和電氣信息類大學(xué)生學(xué)習(xí)使用。Concerning with the lack of experimental equipment and content based on MSP430,and especially,the experimental equipment of MSP430 senior products,an experimental equipment based on MSP430F5529 microcontroller is developed. It mainly consists of two parts： MSP430 Launch Pad and main board. Compared with traditional microcontroller experiment equipment,a few analog circuits were added. The experiment we set up takes advantage of all microcontroller peripherals. Students can do two kinds of experiments： module experiment and complex experiment.Therefore it fits university students in automation and electrical major very well.
標(biāo)簽： msp430f5529 單片機(jī)
上傳時(shí)間： 2022-04-13
上傳用戶：
摘要 DAQmx驅(qū)動(dòng)作為N公司的第三代數(shù)據(jù)飛集硬俘驅(qū)動(dòng)程序，減少了傳統(tǒng)數(shù)據(jù)采集硬件驅(qū)動(dòng)程序帶來的編程復(fù)雜性，可被多種編程語言調(diào)用，程序接口功能強(qiáng)大，應(yīng)用起來十分方便。研究并使用DAQmx驅(qū)動(dòng)程序開發(fā)基于PX1總線的數(shù)采系統(tǒng)逐漸成為趨勢。針對PXI總線數(shù)采系統(tǒng)開發(fā)中必須解決的采集同步、觸發(fā)等關(guān)鍵技術(shù)問題，重點(diǎn)講迷在LABVIEW中利用DAQmx驅(qū)動(dòng)實(shí)現(xiàn)多塊數(shù)采卡同步采集、多功能數(shù)采卡的橫擬與數(shù)字信導(dǎo)同步采集的程序設(shè)計(jì)技術(shù)以及數(shù)字與模擬信號(hào)觸發(fā)程序設(shè)計(jì)技術(shù)等。利用這些技術(shù)可解決大部分基于PX1總線的數(shù)據(jù)采集儀器設(shè)計(jì)問題。并結(jié)合工程實(shí)際，演示了利用DAQmx工具開發(fā)的32通道多功能PXI總線數(shù)據(jù)采集系統(tǒng)。DAQmx硬件驅(qū)動(dòng)程序是N公司研制的第三代硬件驅(qū)動(dòng)程序，在LABVIEW環(huán)境下使用可簡化數(shù)據(jù)采集系統(tǒng)程序設(shè)計(jì)。且可被C++、VC++、以及LabWindows/CVI等程序調(diào)用，為應(yīng)用其他開發(fā)語言的工程師提供了方便。DAQmx驅(qū)動(dòng)程序在數(shù)據(jù)采集程序設(shè)計(jì)時(shí)具有如下特點(diǎn)：對多功能的數(shù)據(jù)采集卡都使用統(tǒng)一的編程界面，可編寫模擬輸入、模擬輸出、數(shù)字10以及定時(shí)器/計(jì)數(shù)器程序，驅(qū)動(dòng)程序完全支持多線程程序。利用Measurement&Automation（MAX）配置工具，可簡化數(shù)據(jù)采集卡的配置。在異常條件下運(yùn)行可靠，傳統(tǒng)的DAQ驅(qū)動(dòng)難以處理異常情況，而DAQmx定義并加強(qiáng)了異常條件處理方法，這比傳統(tǒng)DAQ驅(qū)動(dòng)更可靠，一個(gè)最重要的特征是簡化了采集同步的難題。傳統(tǒng)DAQ中的設(shè)備同步實(shí)現(xiàn)起來相當(dāng)復(fù)雜，必須通過軟件編程路由RTSI總線或PFI信號(hào)線來完成，而DAQmx應(yīng)用時(shí)不必為信號(hào)指定路由，只需確定同步信號(hào)，所有路由工作由DAQmx自動(dòng)完成。本文結(jié)合工程開發(fā)實(shí)際介紹在LABVIEW環(huán)境下應(yīng)用DAQmx驅(qū)動(dòng)程序開發(fā)數(shù)據(jù)采集系統(tǒng)的技術(shù)，主要講述利用DAQmx解決多塊卡同步的問題，以及多功能數(shù)據(jù)采集卡的數(shù)字與模擬采集同步以及信號(hào)觸發(fā)等問題。
標(biāo)簽： daqmx驅(qū)動(dòng) labview 數(shù)據(jù)采集系統(tǒng)
上傳時(shí)間： 2022-06-22
上傳用戶：
Modbus是由Modicon（現(xiàn)為施耐德電氣公司的一個(gè)品牌）在1979年發(fā)明的，是全球第一個(gè)真正用于工業(yè)現(xiàn)場的總線協(xié)議。ModBus網(wǎng)絡(luò)是一個(gè)工業(yè)通信系統(tǒng)，由帶智能終端的可編程序控制器和計(jì)算機(jī)通過公用線路或局部專用線路連接而成。其系統(tǒng)結(jié)構(gòu)既包括硬件、亦包括軟件。它可應(yīng)用于各種數(shù)據(jù)采集和過程監(jiān)控。為更好地普及和推動(dòng)Modbus在基于以太網(wǎng)上的分布式應(yīng)用，目前施耐德公司已將Modbus協(xié)議的所有權(quán)移交給IDA（Interface for Distributed Automation，分布式自動(dòng)化接口）組織，并成立了Modbus-IDA組織，為Modbus今后的發(fā)展奠定了基礎(chǔ)。在中國，Modbus已經(jīng)成為國家標(biāo)準(zhǔn)。豆丁標(biāo)準(zhǔn)編號(hào)：GB/T19582-2008標(biāo)準(zhǔn)名稱：《基于Modbus協(xié)議的工業(yè)自動(dòng)化網(wǎng)絡(luò)規(guī)范》分3個(gè)部分：《GB/T19582.1-2008第1部分：Modbus應(yīng)用協(xié)議》《GB/T19582.2-2008第2部分：Modbus協(xié)議在串行鏈路上的實(shí)現(xiàn)指南》《GB/T19582.3-2008第3部分：Modbus協(xié)議在TCP/IP上的實(shí)現(xiàn)指南》
上傳時(shí)間： 2022-07-18
上傳用戶：
A German-Chinese company with almost 100 years experience in automobileelectronics industry·Founded in 2004 Joyson and Preh in 1919·Working since 1988 in the automotive industry·More than 40 years experience in industrial auomationOne of the biggest merger of China and Germany,company in automotive industry,listed in Shanghai(code 600699)Strong worldwide market:·Ningbo/China·Headquarters·Automotive Components Division (Joyson)Bad Neustadt/Deutschland·Electronics Division(Preh)·Automation Division(PIA)
上傳時(shí)間： 2022-08-09
上傳用戶：
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