gprs

说明：  STM32F407+串口接收数据采用DMA方式 六路串口(Stm32f407 + serial port adopts DMA mode six channel serial port to receive data)

Mifare源程序对于开发研究的人员有很大的帮助(Mifare source )

说明：  采用stm32f4核心板，实现AD采集，效果很理想，可测量流量，液位(Achieving Flow Acquisition)

基于STM32F103C8T6超声波多路电路，已调试通过(Based on STM32F103C8T6 ultrasonic multi-channel circuit, has been debugged)

自己画的四轴飞行器，原理图，pcb。。。。。。。。。。。。。。。。。。。。。。。为了20个子，我真的不容易(Own painting Four aircraft, schematics, pcb)

对PID的学习从入门到精通吃透，有助于初学者快速学习掌握(For PID learning from entry to master fully digested, to help beginners learn to master)

基于STC89C52RC的单片机的PWM电机调速(STC89C52RC microcontroller-based PWM motor control)

本文件是基于51单片机的电子门铃设计程序，并且附带有proteus的仿真文件，可帮助单片机爱好者更好地学习哦！(This document is based on 51 single-chip electronic doorbell design procedure, and with proteus simulation files, can help single-chip computer enthusiasts learn better!)

说明：  单片机驱动3310 lcd显示屏的c程序，单片机与屏的线路连接可以参见程序中的宏定义。程序写得很精简，但是很好用。(Microprocessor 3310 LCD display c procedures, SCM and the screen can see the line connecting the procedures macro definition. Very streamlined procedures, but is useful.)

说明：  使用STM32F103 32位芯片配置触摸屏以及控制触摸屏(Configuration of Touch Screen and Control Touch Screen with STM32F103 32 Bit Chip)