pid控制永磁电机

HMC5883L测试程序，MCU为AT89S52，经测试可用(HMC5883L testing procedures, MCU for AT89S52, have been tested)

MPC08卡的高级测试程序，能够对MPC08卡的大多数功能进行测试。(MPC08 card advanced testing procedures, capable of MPC08 card most of the features to be tested.)

说明：  风力摆是一种通过风机作为唯一动力驱动的装置,深入研究该系统对空间飞行器、四旋翼无人机的运动状态和卫星姿态控制具有重大意义。(Wind pendulum is a device driven by wind turbine as the only power. It is of great significance to study the motion state of space vehicle, quad-rotor UAV and satellite attitude control.)

ADS1273芯片驱动程序，采用SPI通信协议，单通道可切换通道采样，使用平台为KEIL4.2，驱动芯片为STM32F403ZE(A driver for ADS1274，use the SPI communication protocol.The develop platform is KEIL4.2)

说明：  STM32F103_硬件SPI控制LCD例程(STM32F103_Hardware SPI Control LCD Routine)

电场，考虑电导率，电流密度矢量关系式变化关系(Electric field, considering the electric conductivity, the current density variation of the relation vector)

用IF语句实现秒表功能的代码，显示范围在000至99.9.(Stopwatch function code with the IF statement, displayed in the range of 000 to 99.9.)

利用AT89C51单片机的定时，定时计数器T0秒，秒计数的时候，第二代，再加上1秒计数，计数到60秒，自动从0开始。单片机12MHz晶振频率(Using AT89C51 single-chip timing, timing counter T0 seconds, seconds count as a time when the second generation, plus 1 seconds count, count to 60 seconds, automatically the beginning of 0. Crystal frequency chip 12MHZ)

Analog Circuits Cookbook

带参数存储的整点报时音乐电脑时钟，算是一个比较适合初学者一个小系统。有一定的参考价值。(With parameters stored in the computer clock chime music, be a more suitable for beginners a small system. Have a certain reference value.)