单片机向LM629给初值，LM629根据所给参数开始调节直流电机转速，编码器反馈值送回LM629，重新修改参数，控制电机转速。-Microcontroller to the initial value to the LM629, LM629 began to adjust parameters according to the DC motor speed encoder feedback value back to the LM629, re-modify the parameters to control the motor speed.