CRC-check

一线显示,把电源跟数据线结合起来,减少了通讯连线.控制程序是C51的.(Line shows that the power supply combined with the data lines to reduce the communication connection. Control procedures are in C51.)

RS485通信的源代码，可进行两个系统之间信号的传递，介绍其编程规则(RS485 communications source code, can be passed between the two signal systems, introduces its programming rules)

步进电机驱动，四相五线步进电机控制的测试程序，C51编写，读者可稍加修给即可应用(Stepper motor driver)

说明：  用4*4矩阵键盘给液晶1602送四位数，其中第四行按键设置为功能键，按键显示可调对应位的数字(With 4* 4 matrix keyboard to send the four-digit LCD 1602, the fourth line of buttons is set to function keys, adjustable button displays the corresponding number of bits)

SD Specifications_Ver3.01

本人收藏的一个按键发音的程序， 很不错的源码,值得下载(My collection procedures pronunciation of a button, it is a good source, it is worth downloading)

TCS3200传感器捕获方波频率，可以根据频率变化识别外部光源颜色(TCS3200 sensor to capture a square wave frequency, the frequency change can identify the external light source color)

用于模块化多电平逆变器最低电平调制程序,很好的控制方法(Minimum level modulation program for modular multilevel inverters)

主要关于STM32F405开发板上的CAN通信源码，可嵌入到开发板运行，结合LCD显示屏进行数据显示。(About STM32F405 main development board CAN communication source, can be embedded into the development board to run, combined with the LCD monitor for data display.)

该程序为初学者学习单片机时使用的60S倒计时程序，可将开程序用在proteus软件上进行仿真，我试过可行的~(The program for beginners to learn the use of single-chip microcomputer of the 60S countdown procedures, can be used in open procedures proteus simulation software, I tried to possible ~)