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• 热点芯片（Hot Chips 20）　2009-01-04 14:06
  Like Circuit Cellar， the Hot Chips conference just celebrated its 20th birthday. This month， Tom takes a look at today‘s bleeding-edge silicon that may find its way into tomorrow's mainstream designs. And the 20th birthday is also a good time to look back and reminisce about the hits and misses. Tom says "it‘s been a fun ride and it ain't over yet." Once again， I enjoyed my annual rite of summer，the Hot Chips conference at Stanford University. This year was a bit special as Hot Chips turne...
  

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• C语言指针（More on Pointers?）　2009-01-05 08:53
  This month， George responds to reader requests for a thorough explanation of pointers in C language. He includes several examples and homework assignments. To get you started，George explains the connection between CPU address bits and memory address bits. I have had several requests for more information about pointers. Well， here it goes. I'll give you more than you ever wanted to know about pointers. ADDRESSING Pointers contain the address of an object and can be used to access that obj...
  

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• SD记忆卡选取--Ⅰ（Access SD Memory Cards (Part 1)）　2009-01-03 10:28
  Solid-State Storage Media in Embedded Apps Jeff uses SD solid-state storage media in embedded designs. In this series of articles， he provides a thorough introduction to SD technology. Read on to learn how he gets real data in and out of the SD card with the FAT file format. My first hard drive was 5 MB and took up only a 5″ bay. Considering double-sided 5″ floppies were 720 KB at the time， that was pretty darn good. Solid-state memory is beginning to give mechanical storage a run for its mo...
  

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• 功率转换--Ⅰ（Power Switching in the Real World (Part 1)）　2009-01-02 13:36
  Basic Applications and Safety Precautions How well do you understand solid-state power switching？ In the first part of this series， Steve introduces the method and provides important safety precautions. Use his tips and tricks to work safely with high-power devices. It seems simple enough： just use a microcontroller to turn that widget on or off. Solar power from photovoltaic cells seems to be a current hot interest （both puns intended）， and yet there are many pitfalls along the way，...
  

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• FPGA设计（Designing with FPGAs）　2009-01-01 20:32
  A Guide for Embedded Development FPGAs are becoming increasingly popular in embedded systems. Sharad presents several useful methods for designing a system with FPGAs. He also addresses concerns that come up during FPGA design on a complex board. FPGAs are common in embedded systems. In this article， I will describe effective methods for designing with FPGAs. I will focus on FPGA selection parameters and effective use of resources in high-performance FPGAs. I will also examine issues that crop ...
  

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• 数字广播接收(Digital Radio Reception)　2008-12-30 09:46
  Build a Longwave AM Radio Receiver Follow Krzysztof as he constructs a digital direct-conversion receiver for long waves. Tuning is controlled by a USB serial connection with a computer running terminal-emulating software. The LM3S811-based system proves you can build a radio receiver with a few discrete components. I always wanted to build a radio receiver that could be digitally tuned， without knobs or variable capacitors， just a link to a computer. It would be a software-defined radio that ...
  

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• 虚拟音频控制(Virtual Audio Control)　2008-12-24 10:08
  Build a Virtual Instrument Interface The Real Virtual Instrument Interface design controls any musical instrument with a MIDI input and captures its audio output over the Internet. The streaming media device interfaces to virtual music studio software and can also simply record audio if you don‘t need MIDI. During the last decade， computers have become important instruments for musicians. They are used for sound recording， sound generation， and music production. In addition， the all-importa...
  

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• 微控制器时钟锁定（Microcontroller Clock-Locking）　2008-12-22 22:24
  Frequency Reference Synchronization Michael built an accurate frequency reference synchronized to a GPS clock. The frequency counter can count to 50 MHz with 1-Hz accuracy. You can also use it to generate GPS-locked output signals as a frequency reference or as a component in a radio receiver. The device can display GPS information such as time， location， and velocity. An old aphorism goes， "Give a man a clock and he knows what time it is. Give a man two clocks and he is never sure." However，...
  

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