This is when the Electronic Design Contest in 2009 with the NEC to provide a ded...

5l 系列单片机为许多控制提供了高度灵活和低成本的解决办法。充分利用他的片内资源，即可在较少外围电路的情况下构 成功能完善的超声波测距系统-5l Series single-chip control for a number of highly flexible and cost-effective solution. Make full use of his resources-chip can be less the case of the external circuit constitutes a function of the ultrasonic ranging system to improve

c51用户手册，包括软、硬件等系统结构性的内容。-C51 user manual, including hardware and software systems such as structural elements.

深井泵自动控制器，其中包括完整的硬件设计和软件程序，可以为初学者练手用。-deep well pump automatic controller, which includes a complete hardware design and software program for beginners to practice hand.

ISD2560发音程序，经测试比较完全。可实现录放音功能。-ISD2560 pronunciation procedures, the comparison is totally tested. Music playback function can be realized.

MCS-51单片机实用子程序库（3），WORD文档-MCS-51 microcontroller practical Subroutine Library (3), the Word document

18B20程序，用C语言编写，代码结构清晰，语言简练，供新手学习。-18B20 procedure, using C language, code structure clear, concise language for the novice to learn.

简易谐波分析仪 -Simple Harmonic Analyzer

1.1602LCD显示字符串 2.1602字符程序 3.1602第二行第一个字符的位置显示字母“A”c 4.1602左移和闪烁asm 5.1602左移显示c语言程序 6.液晶应用 4线 7.液晶应用 8线 -2.1602 shows that the string of characters 1.1602LCD procedures 3.1602 second line of the first character location of the letters " A" c 4.1602 the left and the left show the asm 5.1602 flashing c language program 6. 4-line LCD applications 7. 8 line LCD applications

flow of ic design是一个很好的关于如何去设计ASIC的的教程，虽然是英文的，但是很容易看明白。是每一个想在EDA领域有作为的人都应看的教程！-flow of IC design is a good design on how the ASIC Guide, in English, but can easily understand this. Every one of the EDA to the field as a person should look at the handbook!

As you have learnt that sleep( )/usleep()/nanosleep() are not good to delay a process. Timers can provide more accurate time control in applications. In this lab, you will explore POSIX timers and signal programming, experience the timer drift. The primary focus of this lab will be "time". The experiment will show you several methods to measure time in your applications.