saving energy clamping program saving more than while sentence

嵌入式工业控制机EPIC v2.0标准，包含机构标准、设计标准等-Embedded Industrial Control Machine EPIC v2.0 standard, including institutional standards, design standards, etc.

资源描述This application note shows how to control a permanent magnet synchronous motor (PMSM) with the sensorless field-oriented control (FOC) algorithm, using an ARM® Cortex®-M0-based PSoC 4 device. The FOC algorithm is frequently used in motor control applications because it allows motors to operate with less noise and more stable torque output than other algorithms. Sensorless FOC adds the advantage of reducing the cost due to the absence of rotor position sensors. Sensorless FOC is used in many applications including consumer (air conditioner, refrigerator), industrial (blower, pump), and commercial (elevator, escalator) products.

其中sound.c 用于录音和回放。其中特别需要注意的是:1。目前声卡似乎不能打开全双工，所以如果fd = open("/dev/dsp", O_RDWR) ，则无法录音和回放。只能分别设置RDONLY和WRONLY。即半双工方式。否则，就是在录音的时候可以听见，但是无法回放。分析下来似乎是IIC总线中只分配了一个通道给声卡，或者是只启用了一个通道，所以无法录音和放音同步进行。解决方法就是分别以RDONLY方式打开进行录音和WRONLY方式打开进行放音。 Sound1.c用于将录音保存在test.wav文件中，并利用cast test.wav > /dev/sound/dsp回放文件。此处需要注意的是，录音频率必须是44100才能正确回放。否则就会出现类似快放的效果。分析应该是cast方式利用了dsp的默认播放频率44100，所以如果录音的时候低于这个频率，这放的时候就会快放。 此外，设置采样率的时候必须设置成16bit，否则会提示出错。原因尚不知道，估计是与声卡有关。

Discussing embedded systems in general is difficult, because each embedded system is unique. Rather than presenting a list of general principles for handling embedded development issues, this book presents examples of problems encountered and solutions to those problems using real hardware and software. In that sense, it is a “cookbook” for developers that offers design “recipes” that can be elaborated on or modified as needed to solve other design problems.

这是一个简单的 C 程序，在 C 中的液晶显示为 8051 的设计说明中给出细节和容易理解

AT91SAM7A3-BasicTools-IAR4_30A-1_21.rar为AT91SAM7A3开发板IAR环境下的例程-AT91SAM7A3- BasicTools- IAR4_30A- 1_21. rar for AT91SAM7A3 IAR Development Board under the environment routines

许多应用程序通常使用emcpy（）C库函数将大量数据从一个内存区域复制到另一个内存区域。由于这可能相当耗时，因此花一些时间优化执行此操作的函数可能是值得的。

自制硬盘mp3播放器，自己动手制作的好资料--Hard disk mp3 player.

this the sdio source code for dm644x, it could support SDHC.-this is the sdio source code for dm644x, it could support SDHC.

1、实验目的 掌握编写一般GUI程序的基本步骤，简单组件的事件响应机制及程序调试的基本要领。 2、实验内容及要求 1）使用按钮、标签、文本组件、选择组件构造GUI。 2）对组件产生的事件给出响应。 3）体现图形用户界面各种布局策略的设计与使用。 -1, the experiment was prepared by the general GUI program to master the basic steps, simple components and procedures for incident response mechanism debugging the basic essentials. 2, the experimental contents and requirements of 1) the use of buttons, labels, text components, select components constructed GUI. 2) components are given in response to the incident. 3) reflect the variety of the layout of graphical user interface design and the use of strategy.