单片机控制直流电机调速；能实现正反转，自动变速器，手动变速~高速报警等等功能~-Controlled DC Motor to achieve rotating, automatic transmission, manual transmission speed alarm, etc functions ~ ~

用DAC0832控制直流电机转动前进，转速可调；用两位数码管显示速度，用四位数码管显示里程-DC motor rotation control with DAC0832 forward, speed adjustable with two digital display spee

基于stm32单片机的直流电机控制程序，利用编码器反馈形成闭环系统，再利用pid调节(The control program of DC motor based on STM32 single chip microcomputer, using encoder feedback to form a closed-loop system, and then using PID regulation)