说明：  基于单片机的推挽型逆变器控制系统设计及其程序设计 SA838初始化及控制子程序 ADC0809的控制及数据处理子程序 数据处理及电压显示子程序
(MCU-based push-pull type inverter control system design and programming SA838 Subroutine to initialize and control the ADC0809 data processing control and data-processing subroutine and voltage display subroutine)