FixedWidthTest

LPC1788元件库，在华电路图时可以直接拿来使用，省去大量时间，ORCAD格式的。(LPC1788 component library, the wiring diagrams in China can directly use it, eliminating the need for a lot of time, ORCAD format.)

基于正点原子stm32的频谱 a1读取ad信号显示(Punctuality atomic spectrum based stm32 a1 read signal display ad)

说明：  一个按键的多次击键组合判别技巧 有时在设计中，往往要用一个按键来输入多种信息。如：单击/双击/三击、短击/长击、 还有各种组合击键方式。可以用以下程序来做。 如果按键闭合时间判断为一次短击 如果按键闭合时间判断为一次长击(A button multiple keystroke combinations sometimes Discriminant skills in design, often using a button to enter a wide range of information. Such as: click/double/triple-clicking, hit a short/long shot, there are various combinations of keystrokes way. The following procedures can be used to do. If the button closure for a short time to judge the hit to determine if the button closure for a long time to hit)

在过程控制中，按偏差的比例（P）、积分（I）和微分（D）进行控制的PID控制器（亦称PID调节器）是应用最为广泛的一种自动控制器。它具有原理简单，易于实现，适用面广，控制参数相互独立，参数的选定比较简单等优点；而且在理论上可以证明，对于过程控制的典型对象──“一阶滞后+纯滞后”与“二阶滞后+纯滞后”的控制对象，PID控制器是一种最优控制。PID调节规律是连续系统动态品质校正的一种有效方法，它的参数整定方式简便，结构改变灵活（PI、PD、…）(In process control, the PID controller (also called PID regulator) controlled by deviation ratio (P), integral (I) and differential (D) is one of the most widely used automatic controllers. It has the advantages of simple principle, easy realization, wide application, independent control parameters, simple parameter selection, etc. It can also be proved theoretically that PID controller is an optimal control for the typical object of process control - "first-order lag + pure lag" and "second-order lag + pure lag". System. The regulation rule of PID is an effective method for dynamic quality correction of continuous system. Its parameter setting method is simple and its structure is flexible (PI, PD,...).)

12864的液晶程序。51单片机开发的C代码，便于移植(12864 LCD program. 51 MCU development of C code, portable)

说明：  STM32控制AD9954产生正弦波等波形，频率幅值可调，包含两篇论文。(STM32 controls AD9954 to generate sinusoidal wave and other waveforms with adjustable frequency amplitude, including two papers.)

说明：  基于HT50F51和nrf2401芯片的遥控器实用例程(Based on HT50F51 and nRF2401 chip remote control practical routines)

基于STM32的MP3音乐播放器设计，完整工程(STM32 MP3)

说明：  超声波模块hc-sr04基于f4的超声波测距实验(Ultrasonic ranging experiment of hc-sr04 ultrasonic module based on F4)

说明：  stm32f103c8t6 bootloader(stm32f103c8t6 boot loader)