电磁场

基于MSP430的超声波测距程序代码，定时器A输入捕捉使用例程，(MSP430-based ultrasonic ranging program code)

zhigongcankao,zijixiede,hualehenchangshijian

本书主要介绍由ADI工程师亲自参与设计、调试并验证的实验室电路。通过这些实验室电路,可以将这些产品迅速和放心地组合起来。这些电路为许多通用应用提供解决方案。每款电路包含详细的设计文档、常见电路变化以及更多信息。电路功能和性能已经过硬件验证。(This book introduces the ADI engineers personally involved in the design, debug, and validate laboratory circuits. Through these laboratories circuit, these products can be combined quickly and safely. These circuits are provided for many common applications solutions. Each circuit includes detailed design documentation, common circuit variations, and more. Circuit functionality and performance of the hardware has been verified.)

说明：  ATK-HC05蓝牙串口模块的使用，实现蓝牙串口通信(Using ATK-HC05 Bluetooth Serial Port Module to Realize Bluetooth Serial Port Communication)

PMSM 电机FOC控制单片机程序，SPANSION Cortex-M4 单片机(PMSM FOC control sample code)

用于初学者使用的CC2530案例教程，包块CC2530的AD原理图和RF天线模块(CC2530 case tutorial for beginners, AD schematic of the CC2530 and RF antenna module)

建立环形缓冲区，将发送缓冲区建立成一个环形的缓冲区，在这个环形缓冲区内，通过头指针和尾指针来定位空白区和数据区(Ring buffer and send buffer created as a circular buffer in the ring buffer head and tail pointers to locate the blank area and data area)

说明：  STM32控制DDS输出正弦波等波形，频率幅值可调。(STM32 control DDS output sine wave waveform, adjustable frequency amplitude.)

51单片机，结合DS18B20温度传感器，实现对温度的采集，通过数码管显示(51 single-chip, combining DS18B20 temperature sensors, temperature acquisition, through a digital display)

文以永磁同步电机为对象，采用矢量控制方案，首先我们研究了基于PI 的控制算法，在仿真基础上指出了PI 算法存在的一些不足。 在此基础上我们研究了基于扩张状态观测器（ESO）前馈补偿和线性比例反馈控制的永磁同步电机速度环控制算法， (Taking PMSM as the controlled plant, this paper studies the control system based on vector control, first, the servo control scheme based on PI control law is studied. Some limitations of PI based control scheme are pointed out. )