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• 先进的连接I/O技术（Advanced Technology Attachment I/O）　2008-09-30 23:56
  Use ATA Interfaces For General-Purpose I/O Applications Using modern PC interfaces for connecting application-specific hardware can create a wide range of problems for embedded designers （e.g.， slow communication and long latencies）.In this article， Wolfgang describes a viable alternative： an ATA interface. Employing ATA as the low-latency embedded interface allows you to apply miniaturized motherboards instead of typical industrial platforms， which are considerably more expensive. When PC...
  

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• 简单的硬件开发(Simple Hardware Development)　2008-09-29 13:56
  After nearly three decades of programming, Taylor recently decided to focus his attention on learning how hardware is developed. He tackled his first project with a Xilinx Spartan-3E starter kit and the VHDL programming language. After 27 years of programming and increasing apathy toward new "technology，" which is generally nothing more than variations on existing themes （Ruby and Python are new scripting languages， but not significantly different than Perl， C# is a variation of Java， OpenO...
  

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• 建立在游戏系统上的微处理器（MCU-Based Game System）　2008-09-28 10:34
  A Dot-Matrix Game That Targets C Coding Efficiency Andrew built a hand-held， dot-matrix video game that features scrolling scores and sound effects.You can implement an Atmel AT90S2313 and the C programming language to build a similar system. This project proves that you can use a modern CPU architecture and an efficient compiler to produce compact code without having to resort to assembly language to achieve your desired functionality. Some problems in life are easy to solve. Others， when you...
  

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• 创建一个Modbus Slave（Create A Modbus Slave）　2008-09-27 14:57
  Several months after creating a Modbus master， Aubrey continues his Modbus exploration by creating a Modbus slave on a Cypress PSoC microcontroller. To enable you to change configurations or speed up the CRC generation， he describes three different methods of slave creation. Having written a two-part series last year about the creation of a Modbus master （"Generic Modbus Simulator，"Circuit Cellar 200/201， 2007），it would seem logical that I would have published a loosely linked third part-...
  

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• 建立于飞行数据采集的微处理器（MCU-Based Flight Data Acquisition）　2008-09-26 11:58
  Real-Time Vibration Measurement for Aircraft Excessive rotor vibration can endanger a helicopter and its crew. That‘s why Juan developed a system that measures a helicopter's tail rotor vibration in real time. The inexpensive design determines the maximum vibration amplitude in a Bell 206 JetRanger helicopter‘s tail rotor. An accelerometer and an optic sensor in the tail rotor collect data， which is later processed by a Cypress Semiconductor CY8C27443 microcontroller and displayed on a Hitach...
  

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• 数字音频播放器（Digital Audio Player）　2008-09-25 12:56
  Jan's media player is an embedded hardware/software system for 16-bit digital audio. The simple system is built around an LPC2148 microcontroller, an SD card interface, and an audio DAC interface. If you work on electronic designs，then you‘ve probably had to make a decision about dividing your project between hardware and software. The duality of hardware and software has some similarities to dualities in physics such as mass/energy and wave/particles. Back in 2003， I built myself a simple MP...
  

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• 简单的机器人技术（Robotics Made Easy）　2008-09-24 11:21
  A Peripheral Chip for Low-Level Functions Robotics and motion control applications typically require specialized hardware and software.Monte introduces a simple peripheral chip that can take care of all of the low-level functions. In these days of chips with almost unlimited transistor budgets， it is hard to find a new peripheral chip to use when the main CPU doesn‘t have exactly the right mix of I/O. This is because it's hard for chip architects to come up with a balance of functionality（tra...
  

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• PSoC设计技术-II（PSoC Design Techniques (Part 2)）　2008-09-23 21:04
  Add DSP Effects, A User Interface, And More Chris continues explaining PSoC design techniques by describing his eight-channel mixer project. This month， he covers how to enhance the single-chip design with DSP effects， an intercom mode， a user interface， speech， and permanent setting memory. Last month， I demonstrated some advanced analog design techniques in the form of a PSoC eight-channel mixer with adjustment knobs. In this article，I will explain how to further enhance the single-chip...
  

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• 嵌入式Linux开发-II（Embedded Linux Development(Part 2)）　2008-09-22 14:44
  Create An Embedded Development Environment David finishes describing his coLinux cross-development platform that runs on Windows.You can create an embedded development environment with him on coLinux or other versions of Linux. In the first part of this series， I focused on creating a virtual Linux environment on a Windows system using coLinux. coLinx is real Linux running under Windows as a process. It uses Linux device drivers communicating with Windows services to map access to Windows resou...
  

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• 视频邮票(Video Stamp)　2008-09-21 14:43
  A Handy Display for Debugging Programs Jose uses his "Video Stamp" system to debug his programs and display video from various applications. A PIC18F2520 microcontroller and three resistors form a rudimentary DAC to generate the NTSC-compatible video signal. Read on for the hardware and software specifics. Back in 1971， my first project as a hardware design engineer was a"dumb" video terminal that displayed 64 characters per row and 32 rows. When finished， the logic and power supply filled a 1...
  

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• 会计情报传送译码（AIS Transmission Decoding）　2008-09-20 12:42
  Peter created a system that receives and decodes data transmissions from ships and other vessels via the Universal Automatic Identification System. Built around a Luminary Micro LM3S811 evaluation board， the decoder displays a "virtual" radar screen， showing the position of vessels in the area. As a ham radio and embedded hardware/ software engineer， I have long been interested in decoding off-air data transmissions. From an early interest in radio teletype （RTTY） transmissions，I moved on ...
  

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• 卡片联结（Card Connection）　2008-09-19 12:44
  Magnetic Card Data Decoding And Transmission Almost a decade after he built his first magnetic stripe card reader， Carlo updated his design with a PIC18F2550 microcontroller. His new system is an inexpensive commercial TTL swipe card reader that reads， analyzes， decodes， and codes bitstreams. In 1999， I built my first project with a magnetic stripe card. The "Card Reader for a Parallel Port" （CRP） was a small interface that connected from a TTL card reader to a PC printer port. A few year...
  

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• 快速数字过滤（Fast Digital Filtering）　2008-09-18 13:23
  Digital filtering is never fast enough. As Bruce explains， optimizing filtering on 8-bit microcontrollers， with no floating-point hardware， using 16-bit fixed-point arithmetic with 8 bits of integer and 8 bits of fraction （8：8 notation） is a good start. Digital filtering is like auto racing：No matter how fast you can go， you would like to go faster. This observation suggests that optimization of filtering algorithms for speed of execution is always in good taste. For 8-bit microcontrolle...
  

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• 多功能无线警报器（Multifunctional Wireless Alarm）　2008-09-17 11:10
  Carl‘s multifunctional wireless alarm system can monitor everything from the doors to the sump pump in your house.The system features an MC13192 SARD board and several wireless sensors. When the alarm is activated， simply place a call to your house to obtain a status report. I recently designed a multifunctional wireless alarm system that‘s based on the IEEE 802.15.4 wireless data modem specification. Implemented with Freescale Semiconductor's SimpleMAC software， the system runs on microcont...
  

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• 自己动手制作运动控制游戏（Do-It-Yourself Motion-Controlled Gaming (Part 1)）　2008-09-16 08:57
  Get Started With a Simple Application The Nintendo Wii gaming system features a motion-sensing remote that translates hand movements and gestures into actual moves in its games. In this series of articles， Chris describes how you can build your own motion-sensing controller that can interact with a variety of graphics programs running on a PC. One of the joys of teaching an embedded systems class is exploring new technologies and sharing the discoveries with students. To give my students a chan...
  

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