STM32_SD

简单打字速度练习，采用倒计时10分钟进行速度练习。(Simply typing speed exercises for 10 minutes using the countdown speed exercises.)

单片机为at89s52控制步进电机正反调速实验,(The stepper motor positive and negative control experimental)

Foreword The use of reprogrammable memory technology in vehicle electronic control units (ECUs) has increased in recent years, and is expected to continue in the future. Use of this technology has increased the flexibility of being able to use a single ECU hardware part to be used in many different vehicle configurations, with the only difference being the software and calibrations programmed into the unit. Reprogramming of those ECUs in the service environment also allows for ease of field modification of system operation and calibrations. Variations in reprogramming capability and the multiple tools necessary to reprogram vehicles are a burden on aftermarket repair facilities that service different makes of vehicles.

21天学通51单片机开发源代码，学习51单片机的教材，值得下载(21 Days 51 MCU development of source code, 51 MCU learning materials, worth downloading)

Delta servo drive a new generation of hardware ASDA-B2 manual programming is an electrical engineer hardware reference manual,

说明：  由晶格振动声子态密度计算迪拜温度、比热、振动熵等热力学性质的程序。(the programme for caculation of the debye temprature，specific heat, entropy and so on from the DOS of phonon )

单片机键盘扫描程序 微处理器课程设计 八位抢答器(SCM keyboard scanning procedures microprocessor eight Responder Course Design)

基于STM32F4的示波器的源代码，内部含有ucos-ii操作系统。(STM32F4 based oscilloscope source code contains an internal ucos-ii operating system.)

计时器,实现时钟计时(reckon by time)

对矩阵键盘的程序编写，详细地讲述了如何扫描键盘的输入！(The matrix keyboard programming, detailed tells the story of how to scan the keyboard input!)