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使用stm32开发板做的pwm输出控制buck电路，反馈使用PID算法，实现闭环控制(The use of STM32 development board to do PWM output control buck circuit, feedback using PID algorithm to achieve closed-loop control)

用IIC 控制MP3播放、调音量、选曲，方便MP3应用在嵌入式系统。(MP3 player with IIC control, adjust volume, selections, easy MP3 applications in embedded systems.)

电力系统电度表通讯协议，主要针对DL645协议标准(Power system meter communication protocol, mainly for DL645 protocol standards)

STM32F103 RS485 DMA方式接收再发送不定长数据，起始和末尾不会有多余数据产生(STM32F103 RS485 DMA transfer and receive variable length data)

#Grbl - An embedded g-code interpreter and motion-controller for the Arduino/AVR328 microcontroller(#Grbl- An embedded g-code interpreter and motion-controller for the Arduino/AVR328 microcontroller)

该程序为水和水蒸气物性计算程序，在给定任意两个状态参量下，可求得当前状态下水和水蒸气的物性。(The program for the water and steam properties calculation procedures, the next two states at any given parameters, can be obtained by the current state of the physical properties of water and water vapor.)

TEF6624 的RDS接收驱动代码,接收效率已提到最高了(TEF6624 RDS Drv)

att7022设计方案,包括sch,asm,hex等(att7022 design programs, including sch, asm2, hex, etc.)

说明：  avr单片机GCC程序设计说明书~~大家都来下载吧，有利于avr单片机的学习。。。(avr microcontroller GCC program design specifications ~ ~ we are all to download it, avr microcontroller is conducive to learning. . .)

入门教程，给单片机初学者43个实验教程，(Introductory tutorials, 43 experimental tutorials for beginners of microcontroller.)