此部分为降压变换器单片机控制程序，用来控制ATmega16型单片机(This part is a single chip microcomputer control program for the step-down converter)

此部分为数字控制降压变换器的按键控制程序，用来控制两个按键。(This part is the key control program of the digital control step-down converter, which is used to control the two keys.)