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说明：  利用定时/计数器T0从P1.0输出周期为1s的方波，让发光二极管以1HZ闪烁，设晶振频率为12MHz(The use of timer/counter T0 from P1.0 output cycle square wave 1s, so that the light-emitting diodes 1HZ blinking, set the crystal frequency is 12MHz)

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!)

stm32f4 的usb鼠标主机程序，简单的修改即可成为自己的工程(stm32f4 usb mouse host)

HONEY实现工业控制过程的系统,进行任务调度.(HONEY process of industrial control systems, task scheduling.)

ht1621的液晶驱动程序，很好用，欢迎下载。(ht16xx LCD driver, useful, welcome to download. A password to extract passwords note that the procedures do not have the passwords.)

it is program for led matrix

反应测试仪，测人的反应速度，精确到几百毫秒！通过按键测试！(Reaction tester, measuring people' s reaction speed, accurate to a few hundred milliseconds! Through the key test!)

PWM调光 1、学习目的：利用定时器产生PWM，了解原理和使用方法 2、硬件要求：LED灯 定时器 3、试验现象：LED灯由亮到灭，由灭到亮逐步变化，也就是调光现象(PWM dimming, learning objectives: the use of the timer to generate PWM understand the principles and use hardware requirements: LED lamp timer test phenomenon: LED lights from bright to off, gradually changes from off to bright, that is, adjusted optical phenomena)

nrf905 接收机程序 89C52 验证通过 绝对好使(nrf905 receiver program 89C52 verified through absolutely so)

GT400运动控制系统上位机轮廓插补控制程序(GT400 motion control system host computer contour interpolation control procedures)