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.
上傳時間: 2021-11-09
上傳用戶:
電子書-FA工業(yè)自動化設(shè)備設(shè)計基礎(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化設(shè)備和裝置來取代工人繁冗無味的重復(fù)勞動,實現(xiàn) 產(chǎn)品的全部或者部分制造過程的自動化以消除因為人為因素導(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現(xiàn)工廠自動化而做的工業(yè)自動化 設(shè)備的設(shè)計基礎(chǔ)知識。本系列文章主要面對的對象是:有志于投身機械設(shè)計行業(yè) 的,具有基本機電知識的大學(xué)生、應(yīng)屆畢業(yè)生以及畢業(yè) 3 年以內(nèi)的初級設(shè)計師(助 理設(shè)計師)。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)到的理論知識正確地應(yīng)用到設(shè)計實踐中來,讓助理 設(shè)計師發(fā)現(xiàn)自己的不足之處。本系列文章不會解釋設(shè)計方法學(xué)的問題,凡涉及到 設(shè)計方法學(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、優(yōu)化設(shè) 計等。所以,在接下來的講解中,本人會盡量使用簡潔、系列的方式,通俗的語 言列舉我們所要表達的內(nèi)容,盡量做到不羅嗦、不重復(fù),盡量減小諸位的閱讀強 度、節(jié)約大家的時間。所以,我們的口號是“理論聯(lián)系實際”。好了,以下咱們 開始進入工廠自動化設(shè)備的天地中。 注意:本文中所說的自動化設(shè)備主要是大量使用了現(xiàn)代自動化元器件以及自 動化控制系統(tǒng)的各類設(shè)備,與傳統(tǒng)的純機械機構(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化元器件和現(xiàn)代控制技術(shù)的能力,傳統(tǒng)的機械機構(gòu)仍然是 機械的主要組成部分;與現(xiàn)代自動化器件組成的結(jié)構(gòu)模塊相比較,傳統(tǒng)的機械機 構(gòu)具有非常明顯的簡潔、高效的優(yōu)點;所以,在設(shè)備設(shè)計過程中,只有合理地運 用機構(gòu)和自動化元器件、現(xiàn)代控制技術(shù)才有可能設(shè)計出完美的自動化設(shè)備。由于 機械機構(gòu)學(xué)在 18 世紀(jì)已經(jīng)發(fā)展成熟,而且在大學(xué)的《機械原理》課程中有清晰 的闡述,所以,本文會盡量少的提到機械原理,涉及到的機械原理
標(biāo)簽: 工業(yè)自動化
上傳時間: 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
上傳時間: 2022-03-21
上傳用戶:canderile
本文主要介紹如何在Wado設(shè)計套件中進行時序約束,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,兩個平臺之間的轉(zhuǎn)換會更加容易些。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、二氧化碳濃度各個方面的檢測,通風(fēng)、澆灌、溫度、噴灑農(nóng)藥等各個方面的控制進行綜合系統(tǒng)研究,實現(xiàn)溫室大棚對自動化、智能化的要求。這一系統(tǒng)是基于單片機控制的智能檢測,控制系統(tǒng)包含單片機主控模塊、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)計了基于嵌入式STM32F103單片機的交流電壓、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APP和WiFi模塊互聯(lián)后,可以實時顯示交流電壓、交流電流、功率及電量值;通過設(shè)定閾值功率,可以實現(xiàn)對電流的監(jiān)控和對電路的保護。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 電流電壓采集
上傳時間: 2022-03-27
上傳用戶:shjgzh
針對目前MSP430單片機實驗裝置較少、實驗內(nèi)容少,而且無MSP430高端產(chǎn)品的實驗裝置,研制了基于MSP430F5529單片機的綜合實驗裝置,主要包括MSP430 Launch Pad和母板兩部分。較傳統(tǒng)的單片機實驗裝置增加了模擬電路的設(shè)置,設(shè)計的實驗?zāi)軌蚶脝纹瑱C的所有外設(shè),可進行模塊基礎(chǔ)實驗和綜合實驗兩大類實驗,非常適合自動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
上傳時間: 2022-04-13
上傳用戶:
摘要 DAQmx驅(qū)動作為N公司的第三代數(shù)據(jù)飛集硬俘驅(qū)動程序,減少了傳統(tǒng)數(shù)據(jù)采集硬件驅(qū)動程序帶來的編程復(fù)雜性,可被多種編程語言調(diào)用,程序接口功能強大,應(yīng)用起來十分方便。研究并使用DAQmx驅(qū)動程序開發(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,重點講迷在LABVIEW中利用DAQmx驅(qū)動實現(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)計技術(shù)以及數(shù)字與模擬信號觸發(fā)程序設(shè)計技術(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)計問題。并結(jié)合工程實際,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)動程序是N公司研制的第三代硬件驅(qū)動程序,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。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)動程序在數(shù)據(jù)采集程序設(shè)計時具有如下特點: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以及定時器/計數(shù)器程序,驅(qū)動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。在異常條件下運行可靠,傳統(tǒng)的DAQ驅(qū)動難以處理異常情況,而DAQmx定義并加強了異常條件處理方法,這比傳統(tǒng)DAQ驅(qū)動更可靠,一個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信號線來完成,而DAQmx應(yīng)用時不必為信號指定路由,只需確定同步信號,所有路由工作由DAQmx自動完成。本文結(jié)合工程開發(fā)實際介紹在LABVIEW環(huán)境下應(yīng)用DAQmx驅(qū)動程序開發(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觸發(fā)等問題。
標(biāo)簽: daqmx驅(qū)動 labview 數(shù)據(jù)采集系統(tǒng)
上傳時間: 2022-06-22
上傳用戶:
Modbus是由Modicon(現(xiàn)為施耐德電氣公司的一個品牌)在1979年發(fā)明的,是全球第一個真正用于工業(yè)現(xiàn)場的總線協(xié)議。ModBus網(wǎng)絡(luò)是一個工業(yè)通信系統(tǒng),由帶智能終端的可編程序控制器和計算機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:GB/T19582-2008標(biāo)準(zhǔn)名稱:《基于Modbus協(xié)議的工業(yè)自動化網(wǎng)絡(luò)規(guī)范》分3個部分:《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現(xiàn)指南》《GB/T19582.3-2008第3部分:Modbus協(xié)議在TCP/IP上的實現(xiàn)指南》
上傳時間: 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)
上傳時間: 2022-08-09
上傳用戶:
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