09 2015 档案
摘要：数字滤波器滤波器术语衰减 – 输出信号幅度相对于输入信号幅度降低。截止频率 – 滤波器的响应降至额定通带纹波以下时的频率。通带 – 滤波器频率范围，信号通过该范围的衰减量不超过额定值。阻带 – 滤波器频率范围，信号通过该范围时会发生额定量的衰减。阻带衰减 – 阻带中的最小衰减量。通带纹波 – 通带中...
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摘要：RFID Exploration Louis Yi, Mary Ruthven, Kevin O'Toole, & Jay Patterson What did you do? We made an Radio Frequency ID (RFID) card reader and, while attempting to create a long-range spoofer, creat...
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摘要：Radio Basics for RFIDThe following is excerpted from Chapter 3: Radio Basics for UHF RFID from the Book, The RF in RFID: Passive UHF RFID in Practice...
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摘要：PIC24FJ64GB002 with bluetooth USB dongleI will explain my project (how to control a bluetooth USB dongle by PIC24FJ64G002 on HCI protocol layer) step ...
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摘要：Sound card based RFID sniffer/emulator(Too tired after recon.cx to do draw the schematics better than that:) Stay tuned for the next version including...
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摘要：不同频段的RFID产品会有不同的特性，本文详细介绍了无源的感应器在不同工作频率产品的特性以及主要的应用。目前定义RFID产品的工作频率有低频、高频和甚高频的频率范围内的符合不同标准的不同的产品,而且不同频段的RFID产品会有不同的特性。其中感应器有无源和有源两种方式，下面详细介绍无源的感应器在不同工...
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摘要：RFID读写器的工作原理RFID的数据采集以读写器为主导，RFID读写器是一种通过无线通信，实现对标签识别和内存数据的读出和写入操作的装置。读写器又称为阅读器或读头（Reader）、查询器（Interrogator）、读出装置（Reading Device）、扫描器（Scanner）、通信器（Com...
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摘要：Transistor Tutorial SummaryTransistor Tutorial SummaryBipolar Junction Transistor Tutorial We can summarise this transistors tutorial section as follo...
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摘要：Cs5171: Tracking Boost RegulatorAdding a current mirror circuit to a typical boost circuit allows the user to select the amount of boost voltageand en...
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摘要：编码器精度与分辨率的区别对于传感器的分辨率与精度的理解，可以拿千分尺为例，分辨率代表千分尺最多可以读到小数点后几位，但精度还与尺子的加工精度，测量方法有关系。同样的，在旋转编码器的使用中，分辨率与精度是完全不同的两个概念。编码器的分辨率，是指编码器可读取并输出的最小角度变化，对应的参数有：每转刻线数...
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摘要：Linear Actuator - PID ControlIntroductionThis application guide is designed to explain the basics of PID control and how to implement a basic control ...
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摘要：调节/测量放大电路电路图：PID控制电路图如图是PlD控制电路，即比例(P)、积分(I)、微分(D)控制电路。A1构成的比例电路与环路增益有关，调节RP1，可使反相器的增益在0·5一∞范围内变化;A2是积分电路，积分时间常数可在22一426S范围内变化;A3是微分电路，时间常数由Cl(Rl+R（RP...
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摘要：PID Controller AlgorithmsController manufacturers arrange the Proportional, Integral and Derivative modes into three different controller algorithms o...
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摘要：Table of ContentsPractical Process ControlProven Methods and Best Practices for Automatic PID ControlI. Modern Control is Based on Process Dynamic Beh...
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摘要：形象解释PID算法小明接到这样一个任务：有一个水缸点漏水(而且漏水的速度还不一定固定不变)，要求水面高度维持在某个位置，一旦发现水面高度低于要求位置，就要往水缸里加水。小明接到任务后就一直守在水缸旁边，时间长就觉得无聊，就跑到房里看小说了，每30分钟来检查一次水面高度。水漏得太快，每次小明来检查时，...
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摘要：In most cases the voltage that is induced in the coil can not exceed 6V, and it does not have risk to damage any of the elements. But sometimes, under...
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摘要：IDA: What's new in 6.8HighlightsThis is mainly a maintenance release, so our focus was on fixing bugs. However, there are some improvements too:Suppor...
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摘要：J-Link GDB Server - SEGGERHilden, Germany– September 15th, 2011 – SEGGER Microcontroller today announced the freeavailability of the J-Link GDB-Server...
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摘要：emSecureUse Digital Signatures to protect your productsemSecureis an RSA based software solution to authenticate digital assets. It can be used to sec...
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摘要：画时序图工具TimingDesigner 9.2 安装指导先上文件下载链接：http://bbs.eetop.cn/viewthread.php?tid=250446&;highlight=timing%2Bde%24igner安装、破解方法：一、安装1)解压“TimingDesigner_v9.2...
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摘要：https://zh.wikipedia.org/wiki/%E5%88%86%E8%B2%9D分贝（decibel）是量度两个相同单位之数量比例的单位，主要用于度量声音强度，常用dB表示。“分”（deci-）指十分之一，个位是“贝”或“贝尔”（bel），但一般只采用分贝。分贝(dB)是十分之一贝尔...
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摘要：how determine the RC time constant in PWM digital to analog low-pass filter?I 'm looking for the best RC time constant and its reason in a PWM to conv...
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摘要：http://e2e.ti.com/blogs_/b/analogwire/archive/tags/DAC%2bEssentialsDAC Essentials: A new blog seriesAdigital-to-analog converter, or DAC, performs the...
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摘要：http://www.cypress.com/knowledge-base-article/interfacing-sram-jtag-signals-using-voltage-level-shifter-kba81536As a best practice, avoid use of level...
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摘要：线性电压稳压器的分类线性电压稳压器是按照导通组件技术进行分类，包括：NPN-Darlington、NPN、PNP、PMOS 及 NMOS 稳压器。表 1 显示不同的类型以及一般最小电压差与静态电流特性。PNP 双极体晶体管一般被运用于低压降的应用，主要是因为这类晶体管很容易就能够达到低压降，然而，它...
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摘要：DO-214is a standard that specifies a group ofsemiconductor packagesfor surface mounteddiodes.The standard includes multiple variants such asDO-214AA (...
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摘要：After damaging the GPIO port on our raspberry pi while designing a new solar monitoring system we decided that it might be a good idea to build a buff...
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摘要：The FT232H is the single channel version, the FT2232H is the dual-channel, and there is also anFT4232Hquad channel part.While these are all logically ...
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摘要：TXS（开漏优化设计），如I2CTXB（上拉优化设计），如SPITXS0108has integrated pull-up resistors to save board space and cost in open-drain applications.The TXS0108 Does NOT n...
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摘要：是采样速率低于5Msps (每秒百万次采样)的中等至高分辨率应用的常见结构。SAR ADC的分辨率一般为8位至16位，具有低功耗、小尺寸等特点。这些特点使该类型ADC具有很宽的应用范围，例如便携/电池供电仪表、笔输入量化器、工业控制和数据/信号采集等。顾名思义，SAR ADC实质上是实现一种二进制搜...
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摘要：ADC分类直接转换模拟数字转换器（Direct-conversion ADC），或称Flash模拟数字转换器（Flash ADC）循续渐近式模拟数字转换器（Successive approximation ADC）跃升-比较模拟数字转换器（Ramp-compare ADC）威尔金森模拟数字转换器（W...
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摘要：Voltage Translation for Analog to Digital Interface孕龙逻辑分析仪 ZeroPlus Logic AnalyzerHow to modify analog output range of Arduino DueIn today'smicrocontr...
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摘要：JTAG FinderFiguring out the JTAG Pinouts on a Device is usually the most time-consuming and frustrating processand Finding the pinouts for these ports...
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摘要：希腊字母源自腓尼基字母。腓尼基字母只有辅音，从右向左写。希腊语的元音发达，希腊人增添了元音字母。因为希腊人的书写工具是蜡板，有时前一行从右向左写完后顺势就从左向右写，变成所谓“耕地”式书写，后来逐渐演变成全部从左向右写。字母的方向也颠倒了。罗马人引进希腊字母，略微改变变为拉丁字母，在世界广为流行。希...
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摘要：E3 50% tolerance (no longer used)E6 20% tolerance (now seldom used)E12 10% toleranceE24 5% toleranceE48 2% toleranceE96 1% toleranceE192 0.5, 0.2...
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摘要：RC 2nd Order Passive Low Pass FilterThe cut-off frequency of second order low pass filter is given asSecond order low pass filter -3dB frequency is gi...
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摘要：Figure 3-7 shows a block diagram of a DSP system,as the sampling theorem dictates it should be.Before encountering the analog-to-digital converter,the...
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摘要：The Secret Mixed-Signal Life of PWM PeripheralsPulse-width modulation (PWM) peripherals have enjoyed a long association with microcontrollers and powe...
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摘要：Adding Digital control to Dual tracking LM317 / LM337 Bench supplyI've been working on my own idea for a digitally controlled power supply over the la...
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摘要：i just finished this simple circuit and am very satisfied with the result. The output is very stable and extremely linear!just though id share as i di...
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摘要：how to generate an analog output from a in-built pwm of Atmega 32AVR microcontrloller?you need a resistor, a capacitor and an opamp.opamp is not reall...
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摘要：Voltage Translation for Analog to Digital Interface ADCHow to modify analog output range of Arduino DueArduinoDue does not have an analog output volta...
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摘要：CMSIS-DAPV1V2
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摘要：DESCRIPTIONThe DG449 is a dual supply single-pole/double-throw (SPDT) switches.On resistance is 38 and flatness is 2.6 max over the specified anal...
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摘要：jtagger Versatile multiprogrammer for FPGAs, MCUs, etc.Well, it's not really just a jtagger, but I've been calling it that.It's also been christened t...
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摘要：I²C SGPIO ConfigurationSGPIO is a hardware feature of LPC4300 series.There are 16 SGPIO pins called from SGPIO 0 to SGPIO 15.SGPIO is one of the funct...
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摘要：
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摘要：SGPIO inverted clock qualifierHi,With bits 6:5 of SGPIO_MUX_CFG the QUALIFIER_MODE is selected (0x0=enable, 0x1=disable, 0x2=slice, 0x3=pin).With bit ...
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摘要：AN11196: Camera interface design using SGPIO
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摘要：//--------------------------------------------------------------------------------+// LPC43xx Pin Names, All pins defined. ...
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摘要：KL46 custom board SWD reset is never assertedHi everybody,I'm trying to program a custom board based on the KL46. However the reset signal for the SWD...
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摘要：stm32的swd接口的烧写协议是否公开的呢？需要用一台好的示波器来抓才能有足够的存储深度，保证你能够过滤掉那个该死的50clock。按照Arm的手册，每次转换发送方都需要一个TNR---但是我观察JLINK的波形却没有那个该死的TNR。手册中说异步SWD需要，同步不需要----或者相反，但是我没有...
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摘要：Booting dircetly into Redlink FW from flashHello,the usual way to use the Redlink FW is a two-step approach:First the MCU of the probe enumerates as a...
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摘要：Q LPC43xx和LPC18xx有相同的USB接口以及片内USB驱动吗?A 是的.Q LPC4300和LPC1800只是内核不同吗？外设和管脚配置都完全一致？A 为LPC18xx的映像可以直接在LPC43xx(尾号一致)上运行，但是LPC4300的片上RAM比LPC1800多64KB，并且LPC1...
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摘要：LPC43xx SGPIO ConfigurationThe LPC43xx SGPIO peripheral is used to move samples between USB and the ADC/DAC chip (MAX5864).The SGPIO is a peripheral t...
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摘要：LPC4350 SGPIO ExperimentationThe NXP LPC43xx microcontrollers have an interesting, programmable serial peripheral called the SGPIO (Serial GPIO).It co...
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摘要：LPC18xx/43xx OTP Controller driver/* * @brief LPC18xx/43xx OTP Controller driver * * @note * Copyright(C) NXP Semiconductors, 2012 * All rights reserv...
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摘要：static LPC_DEVICE_TYPE LPCtypes[] ={ { 0, 0, 0, 0, 0, 0, 0, 0, 0, CHIP_VARIANT_NONE }, /* unknown */ // id, id2, use id2, name of product...
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摘要：#define CLK_FREQ ( 10000 )#define CORE_FREQ ( 168000000 )static void TIM_GPIO_Config( void ){ GPIO_InitTypeDef GPIO_InitStructure; // Enable GP...
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摘要：LPC-Link2 CMSIS-DAP firmware sourceHi,I'm using the CMSIS-DAP firmware with the LPC-Link2. I'd like to add some features (like a virtual COM port). I ...
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摘要：STM32F4 SPI with DMAA few people have requested code, so I thought I’d post the code showing how I’ve configured my GPIO, timer, SPI, DMA and NVIC mod...
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摘要：STM32 System and Timer Clock ConfigurationsI've started writing some software to drive a series ofTLC5940 16 Channel LED Driverchips on anST STM32F407...
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摘要：Cortex-M4 Core RegistersGoal:visualizingwhat happens to the Cortex-M4 core registers after resetHere's what happens after the processor is reset:Gener...
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摘要：STM32 F4 ADC DMA Temperature SensorGoal:detecting temperature variations using a temperature sensor, ADC with DMA and TIM3 as a trigger (ADC sampling ...
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摘要：STM32 F4 Clock SourcesGoal:routing clock sources to the microcontroller output pin (MCO1)High-speed internal (HSI) clock is 16MHzHigh-speed external (...
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摘要：STM32 F4 DAC DMA Waveform GeneratorGoal:generating an arbitrary periodic waveform using a DAC with DMA and TIM6 as a trigger.Agenda:Modeling a wavefor...
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摘要：STM32 F4 General-purpose Timers for Periodic Interrupts
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摘要：STM32 F4 SPI Accelerometer
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摘要：STM32 F4 GPIO ModesGoal:creating a visual summary of GPIO configuration modes.The summary at the bottom shows the major configuration choices.Basic el...
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摘要：PWM实现ADC和DAC一、PWM实现AD 利用普通单片机的2个IO及一个运算放大器即可实现AD转换电路，而且很容易扩展成多通道。其占用资源少，成本低，AD 转换精度可以达到8位甚至更高，因此具有一定的实用价值。1.1 硬件电路说明图一中“RA0”和“RA1”为单片机的两个I/O脚，分别将其设置为输...
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摘要：DELPHI - How to use opendialog1 for choosing a folder?On Vista and up you can show a more modern looking dialog usingTFileOpenDialog.var OpenDialog: ...
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摘要：Timers get their clock source from External pins or Internal timer sources.ExternalExternal = pins: TI1 or TI2 or ETRset pin to be used:in TIMx_CCMR1 ...
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摘要：How do you generate complementary PWM Outputs?I would like to generate complementary PWM Outputs with adjustable dead time.According to the STM32F401R...
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摘要：How to add Leading Zeroes to a Number (Delphi Format)Here's how convert (an integer) number to a string by adding an amount of leading zeroes.Suppose ...
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摘要：.rdata is for const data. It is the read only version of the .data segment..idata holds the import directory (.edata for exports).It is used by EXE's ...
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摘要：How to detect the types of executable filestype { IMAGE_DOS_HEADER: DOS .EXE header. } IMAGE_DOS_HEADER = packed record e_magic : Word; ...
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摘要：Dynamic-Link Library RedirectionApplications can depend on a specific version of a shared DLL and start to fail if another application is installed wi...
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摘要："J-Link / Flasher Portable V1 ""J-Link ARM / Flasher ARM V2 ""J-Link ARM / Flasher ARM V3 ""J-Link ARM / Flasher ARM V4 ""J-Link ARM Lite V8 ""J-Link ...
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摘要：此图非常详细，可以看到每个字段的内容和大概含义，根据此图动手实践了PE文件结构，下面给出我自己理解的简约结构：为了更加形象生动，特把实验过程记录如下，从实验过程中我们可以发现不小细节：使用一个简单的PE文件举例，下图是PE文件概要信息：图中没有列出DOS头信息，直接跳到了NT头的Image_File...
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摘要：Analyze PE file headers?{ You'll need a OpenDialog to open a Exe-File and a Memo to show the file informations }{ Man braucht einen OpenDialog um ein...
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摘要：How to tell if a file is an EXE or a DLL? 1 void DumpFile(LPWSTR filename) 2 { 3 HANDLE hFile = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ...
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摘要：Malware Analysis Tutorial 8: PE Header and Export Table2. Background Information of PE HeaderAny binary executable file (no matter on Unix or Windows)...
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摘要：Signature Creator for NXP Cortex-M DevicesAlgorithm for creating the checksumThe reserved Cortex-M3 exception vector location 7 (offset 0x001C in the ...
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摘要：Reverse Voltage ProtectionI've long wanted to pull together some reverse polarity protection ideas in one place. Many are found individually on the we...
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摘要：LDO RegulatorHigh accuracy voltage regulatorVout = 2.5V * (1 + ( 5.6 / 6.8 ) ) = 4.55VRecently the author had to adapt a standard circuit configuratio...
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摘要：TVS二极管和稳压二极管的区别TVS管超过它的耐压值后，会瞬间导通短路，反应速度在ns级，而稳压管是稳压作用的，超过它的稳压值，只要功率不超过它的耐受值，就会稳定在它的稳压值范围内。TVS是瞬态抑制二极管，主要是用来抑制瞬时电压尖峰，减少尖峰电压对元器件的损耗。稳压二极管主要是稳压的作用。双向击穿二...
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摘要：Project 03- STM32F4xx PID controllerCMSIS files from ARM provides ARM Math functions.There are also PID controller functions in different formats forf...
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摘要：基于运算放大器的线性稳压器基于运算放大器的线性稳压器为什么DIY？原因有二，第一是市面上的三端稳压器不满足要求，要么性能不好，要么功率不够。第二，市面上也有一枝独秀，性能优异的稳压器，不过它们价格不菲，譬如凌力尔特的LT1581,13美元/片，购买一堆元器件了。或者它们封装独特，不能和普通的三端IC...
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摘要：SIMATIC PID温度控制// VAR_INPUT -------------------------------------------------------------------#ifndef TRUE#define TRUE 0x01#endif#ifndef FALSE#define...
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摘要：采用运放构成的串联稳压电源及可调恒流源电路图集成运算放大器具有开环增益高和输出阻抗低等特点，用它做稳压电源中的比较放大器是很理想的。图1-34所示，由稳压管VDw提供的12V基准电压通过电位器RP加到运放A1的同相输入端，稳压电源的输出电压Vsc又反馈到A1的反相输入端，当Vsc发生变化时，它与同相...
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摘要：一台数控恒流恒压电源的制作直流稳压电源是任何电子电路试验中不可缺少的基础仪器设备，基本在所有的跟电有关的实验室都可以见到。对于一个电子爱好者来说，直流稳压电源也是必不可少的。要得到一个电源，一般有两种方法：一是购买一台成品电源，这样最为省事：二是自己制作一台电源（因为你是电子爱好者），当然相比于第一...
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摘要：Driving proportional valves from microcontrollerI am looking to drive a current regulated proportional (solenoid) valve that needs up to 85mA @ 24V fr...
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摘要：LDO current regulator for power LEDChallengeYou've got a power LED? Great! Build a flash light!What does the spec say? "Voltage: 3.6 .. 3.8 V, power 3...
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摘要：High accuracy voltage regulatorGood morning everybody,I want to make a accurate voltage regulator based on the Basic Stamp.Total range 0-10 V and a re...
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摘要：An Isolated DAC Using PWM OutputArduino‘s (ATmega328P) PWM outputs viaanalogWritecan be conveniently turned into analog voltage levels through the use...
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摘要：Programmed Adjustable PowerI just explored an easy scheme to design a high precision programmed adjustable power.In this scheme, there is no needs to ...
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摘要：1、电感和磁珠都可以用于滤波，但是机理不一样。电感滤波是将电能转化为磁能，磁能将通过两种方式影响电路：一种方式是重新转换回电能，表现为噪声；一种方式是向外部辐射，表现为EMI（电磁干扰）。而磁珠是将电能转换为热能，不会对电路构成二次干扰。2、电感在低频段滤波性能较好，但在50MHz以上的频段滤波性能...
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摘要：MCU的启动方式有很多种：UART接口，扩展的静态存储单元（NOR Flash），SPI Flash，quad SPI Flash，高速USB0和USB1.另外可以通过对OTP存储单元的编程。首先看下内存映射：在MCU复位之后，ARM处理器将会从ROM区域执行代码。LPC43XX包含一个隐藏指针允许...
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摘要：简介本页提供了一些使用LPC43xx器件双核特性的基本信息。此页面上的信息和专题使用Keil uVision4工具，以双核工程的使用来演示。该工程初始化两个内核以运行FreeRTOS，并采用三色LED指示M0和M4内核的运行，以及双核处理器之间的通信。该项目把重点放在双核工程的细节上，力求基础和简单...
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摘要：LPC1800 Series microcontrollersAt 180 MHz, LPC1800 Series microcontrollers combine the industry's fastest ARM Cortex-M3 corewith multiple high-speed c...
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摘要：KTAG K-TAG ECU Programming Tool Master Version V2.1 +J-Link JLINK Without Token LimitationHighlights of KTAG ECU Programming+J-link:1. Software Versio...
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摘要：The TAP controller is a synchronous finite state machine that respondsto changes at the TMS and TCK signals of the TAP and controls the sequence of op...
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摘要：What does this tool do?The LPC18xx/43xx DFUSec utility is a Windows PC tool that provides support functions for LPC18xx/43xx microcontroller via USB. ...
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摘要：Booting LPC-Link2The recommended way to use LPC-Link2 with the LPCXpresso IDE is to boot and soft load a debug firmware image at the start of a debug ...
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摘要：LPC-Link：LPC-Link调试探针由恩智浦、Code Red和Embedded Artists三方共同开发，该探针可与目标板断开，利用板载10针JTAG/SWD连接器直接用于客户自己的设计。LPC-Link采用LPC3154 作为基于ARM9的调试引擎，提供高速USB接口，支持快速编码下载和...
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摘要：https://www.lpcware.com/content/faq/lpcxpresso/using-lpclink2-as-lpc4370-evalAs well as being a standalone debug probe, theLPC-Link2can also be used a...
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摘要：80MHz 12 bit ADC processor LPC4370.LPCxpresso do a LPC LINK2 and LABTOOLS open source oscilloscope demo set. (£84 from Mouser, seems quite well liked....
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摘要：KEY FEATURES• Affordable, Rapid prototyping and development solution for nRF51 Series SoCs• Kit supports both nRF51822 and nRF51422 development• Suppo...
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