數(shù)字頻率計(jì)是電工電子中常用的測(cè)量?jī)x器,數(shù)字頻率計(jì)通過(guò)用輸入待測(cè)信號(hào)對(duì)一特定長(zhǎng)度的信號(hào)進(jìn)行計(jì)數(shù),從而得出頻率并通過(guò)數(shù)碼管直觀的顯示出來(lái)。本文提出了一種與輸入同步的數(shù)字頻率計(jì)的設(shè)計(jì),提高了頻率計(jì)的精度,設(shè)計(jì)采用Multisim軟件進(jìn)行設(shè)計(jì)和仿真的過(guò)程,介紹了其工作原理,硬件電路設(shè)計(jì)和仿真的過(guò)程。設(shè)計(jì)采用了Multisim軟件進(jìn)行設(shè)計(jì)和仿真,設(shè)計(jì)結(jié)果得到的驗(yàn)證。Digital frequency counter is used to measure the frequency of a signal.It is common to use a multivibrator to generate a standard 1 second time base signal and count input signal gated by this signal.However,the asynchronous of this time base signal with input signal will bring errors.In this paper,a high precision frequency counter which use synchronized time base signal generator is proposed.This frequency counter is designed and simulated by Multisim tools and result is verified.
·Overview:20 minutes-Introduction and Objectives-Motor Control Development Toolbox:Library blocks,FreeMASTER, and Bootloader·Hands-On Demo:50 minutes-Motor Kit(Describe Freescale 3-Phase Motor Kit)-Convert simple model to run on Motor Kit with MCD Toolbox and use FreeMASTER·Model Based Design:10 minutes-Model Based Design Steps:Simulation,SIL,PIL and ISO 26262-SIL/PIL Hands-On Demo Step 2& 3 of MBD·Motor Control:20 minutes-FOC Sensor-less control and how to use it to turn a motor·Motor Control Hands-On Demo:80 minutes-Implement FOC Sensor-less Motor Control on Motor Kit-Run software from the model and use FreeMASTER to monitor·Summary and Q&A:10 minutes
VIP專(zhuān)區(qū)-嵌入式/單片機(jī)編程源碼精選合集系列（36）資源包含以下內(nèi)容：1. C51
I2C
驅(qū)動(dòng)程序
含頭文件.2. arm芯 ucos 下的開(kāi)發(fā)框架.3. c8051f***的程序源代碼.4. 新華龍單片機(jī)的flash用法.5. 用C8051F300設(shè)計(jì)鋰離子電池充電器的解決方案.6. c8051f系列單片機(jī) 用過(guò)采樣和求均值提高ADC分辨率.7. C6000指令集
是對(duì)C6000指令集的文檔.8. VxWorks 編程手冊(cè) VxWorks 編程手冊(cè).9. proteus 6.7及其破解（絕對(duì)好用）.10. iic總線資料.11. 手機(jī)游戲禮包包
原理圖采用OrCad軟件或PowerPCB軟件打開(kāi)
好玩的很
快來(lái)試試吧.12. 紅外測(cè)溫計(jì)
紅外線測(cè)溫 自動(dòng)化設(shè)計(jì)
原理圖采用OrCad軟件或PowerPCB軟件打開(kāi)
很完美.13. 9智能機(jī)器人禮包
智能機(jī)器人
單片機(jī)實(shí)現(xiàn)
功能齊全
運(yùn)動(dòng)流暢.14. 哈哈！終于找到了最新版本的UCGUI！
增加了不少的功能.15. Nios II是一個(gè)用戶可配置的通用RISC嵌入式處理器,這個(gè)文檔詳細(xì)介紹這個(gè)處理器的用法.16. 這是一個(gè)c語(yǔ)言寫(xiě)的a/d轉(zhuǎn)換程序。利用i2c總線實(shí)現(xiàn)對(duì)24c02的存和取.17. 學(xué)ＤＳＰ時(shí).18. 漢字液晶子程 液晶屏分為4行*12列漢字.19. 這是一個(gè)c語(yǔ)言描述的8位led顯示的源代碼.20. We demonstrate a method for encoding and decoding the [24,12,8] extended binary Golay code using a s.21. Training embedded apps to process speech may be as easy as finding the right 8-bit micro. Don t let.22. The CC1000 RF transceiver is very easy
to interface with a microcontroller.
The chip is configured.23. One of the most important issues affecting
the implementation of microcontroller
software deals wi.24. AVR單片機(jī)開(kāi)發(fā)中.25. 作基于日立公司superh系列微處理器嵌入式操作系統(tǒng)bootloader源代碼.26. touchsceen_test
├─ main.c C語(yǔ)言主源文件
├─ AscII6x8.c Ascii字符6x8點(diǎn)陣顯示格式數(shù)據(jù)
├─ lcd.c LCD顯示函數(shù)源文件
├─.27. iic_test
├─ main.c C語(yǔ)言主源文件
├─ iic.c IIC總線操作和24C040擦寫(xiě)函數(shù)源文件
└─ iic.h IIC總線操作和24C040寫(xiě)定義頭文件.28. Nexperia系統(tǒng)聲音實(shí)現(xiàn)的源碼.29. 89C516RD+的兩個(gè)AD轉(zhuǎn)換程序,89C51是22.1184MHZ,有64KB Flash 256B(DataRAM)+1024B(Ext.RAM)的性價(jià)比很高的MCU.30. 網(wǎng)上收集的VC多線程開(kāi)發(fā)、嵌入式開(kāi)發(fā)文檔.31. ucos-2在lpc2100上的移制例子。.32. mcf5307實(shí)驗(yàn)源代碼.33. CPLD對(duì)DUSH的讀寫(xiě)控制,LINUX下運(yùn)行.解壓即可..34. HART協(xié)議由Rosemount公司開(kāi)發(fā)且已向每個(gè)使用者開(kāi)放HART協(xié)議采用標(biāo)準(zhǔn)的Bell 202頻移鍵控信號(hào)以1200波特通信以低電平加載于4mA~20mA模擬信號(hào)上.35. 中文MODBUS協(xié)議（完整版）涵蓋協(xié)議基本內(nèi)容。不用我多說(shuō)了吧！自己看好了。.36. μC_OS-II在Nios上的移植（共同學(xué)習(xí)ucosII）.37. SST28F040讀寫(xiě)源程序,C語(yǔ)言編寫(xiě),方便移植.38. 基于ARM 的PDA拼音輸入法源程序,c語(yǔ)言編寫(xiě),方便移植.39. Cypress公司的USB芯片開(kāi)發(fā)資料.40. at91 sam 系列arm7單片機(jī)程序下工具.
VIP專(zhuān)區(qū)-嵌入式/單片機(jī)編程源碼精選合集系列（123）資源包含以下內(nèi)容：1. 研華數(shù)據(jù)采集卡c++ console程序多通道采集數(shù)據(jù)的例子.2. 基于AT89C51的電子秤方案,原理圖,程序.3. FAT32 study report,it s discrips the FAT332 stard , FAT32 學(xué)習(xí)筆記.4. 基于arm的嵌入式書(shū)籍.5. 三菱FX系列PLC密碼解密軟件.不需注冊(cè)..6. This guide reviews the rules and syntax of the principle commands that comprise C and its object-ori.7. 紅外遙控大全.8. ADI公司DDS芯片AD9830應(yīng)用資料.9. ADI公司DDS芯片AD9832應(yīng)用資料.10. ADI公司DDS芯片AD9833應(yīng)用資料.11. ADI公司DDS芯片AD9834應(yīng)用資料.12. PXA27x Processor Family Optimization Guide.13. ti的c2000的spi。有用的著的時(shí)候。可以在程序中測(cè)試spi口.14. *名稱：LCD12864顯示程序 功能：顯示英文.15. 89c51與ds1302代碼顯示時(shí)間的源程序.16. 51實(shí)驗(yàn)板的原理圖！可以作為簡(jiǎn)單的起步參考.17. 由于找不到安裝 紅旗需要的文件.18. W3100是WIZnet公司專(zhuān)門(mén)為以太網(wǎng)互聯(lián)和嵌入式設(shè)備推出的硬件TCP／IP協(xié)議棧芯片.19. 基于狀態(tài)轉(zhuǎn)換法設(shè)計(jì)的電機(jī)正反轉(zhuǎn)、調(diào)速PLC源程序.20. s3c4510b的源代碼以及并口JTAG下載調(diào)試程序.21. 介紹了實(shí)時(shí)嵌入式系統(tǒng)的相關(guān)內(nèi)容,對(duì)于研究嵌入式很用用..22. 射頻讀寫(xiě)模塊是采用最新Mifare技術(shù)的微型嵌入式非接觸式IC卡讀寫(xiě)模塊。內(nèi)嵌ISO14443 Type A協(xié)議解釋器,并具有射頻驅(qū)動(dòng)及接收功能,可以簡(jiǎn)單實(shí)現(xiàn)對(duì)MifareOne等卡片的讀寫(xiě)操作,讀寫(xiě).23. AT91SAM7S64開(kāi)發(fā)板的ADS范例for ATMEL S64-EKAT91SAM7S64-BasicMouseUSB.24. ds18b20的一個(gè)完整程序.25. 我的一個(gè)交通燈的課程設(shè)計(jì).26. mcuzone的AT91RM9200EK底板原理圖Rev2.0.27. 有關(guān)I2C設(shè)計(jì)的資料. 有關(guān)I2C設(shè)計(jì)的資料..28. cmos的教程.29. This designs demonstrates how to use the Ethernet port using a Nios II system on the DE2 board. It s.30. 低頻數(shù)字式相位測(cè)量?jī)x.31. 使用C C++ 開(kāi)發(fā)嵌入系統(tǒng)
詳細(xì)實(shí)例 很實(shí)用.32. 270開(kāi)發(fā)板串口擴(kuò)展測(cè)試程序,arm9 工控板測(cè)試.33. 利用PCB上的走線實(shí)現(xiàn)高頻低通濾波器的設(shè)計(jì).34. LPC２１３１ 對(duì)大家和有幫助的.35. 這是一個(gè)AVR單片機(jī)的紅外遙控程序.36. 嵌入式實(shí)時(shí)操作系統(tǒng)psos的系統(tǒng)調(diào)用手冊(cè).37. 題目1：DSB調(diào)制與解調(diào)電路的MATLAB實(shí)現(xiàn)及調(diào)制性能分析
題目2：SSB調(diào)制與解調(diào)電路的MATLAB實(shí)現(xiàn)及調(diào)制性能分析
題目3：AM調(diào)制與解調(diào)電路的MATLAB實(shí)現(xiàn)及調(diào)
題目5：PM調(diào)制與解.38. 該P(yáng)DF文檔是CPLD/FPGA的入門(mén)教程。里面敘述了PLD的基本結(jié)構(gòu).39. 51單片機(jī)+max7219驅(qū)動(dòng)實(shí)例
8位LED同時(shí)循環(huán)顯示1-9.40. 嵌入式系統(tǒng)中U-Boot基本特點(diǎn)及其移植方法.
Internal Interrupts are used to respond to asynchronous requests from a certain part of themicrocontroller that needs to be serviced. Each peripheral in the TriCore as well as theBus Control Unit, the Debug Unit, the Peripheral Control Processor (PCP) and the CPUitself can generate an Interrupt Request.So what is an external Interrupt?An external Interrupt is something alike as the internal Interrupt. The difference is that anexternal Interrupt request is caused by an external event. Normally this would be a pulseon Port0 or Port1, but it can be even a signal from the input buffer of the SSC, indicatingthat a service is requested.The User’s Manual does not explain this aspect in detail so this ApNote will explain themost common form of an external Interrupt request. This ApNote will show that there is aneasy way to react on a pulse on Port0 or Port1 and to create with this impulse an InterruptService Request. Later in the second part of the document, you can find hints on how todebounce impulses to enable the use of a simple switch as the input device.Note: You will find additional information on how to setup the Interrupt System in theApNote “First steps through the TriCore Interrupt System” (AP3222xx)1. It would gobeyond the scope of this document to explain this here, but you will find selfexplanatoryexamples later on.
Base64 demonstrates how easy it is to decipher
plaintext usernames and passwords. Never login to a public network resource
unless some type of encryption is being used, secure socket layer is one example.
Most FTP sites also use plaintext passwords.
