在单片机的P1端口上接有LCD模块，用来显示计时时间。P3.3、P3.4端口分别接有按钮开关K1、K2，做秒表的计时控制按钮。-P1 in the MCU port access are LCD modules, used to display time of time. P3.3, P3.4 port, respectively, then there are the button switches K1, K2, do stopwa

STM32 控制LCD实例，LCD为HB240128,内已经包含库文件，可直接使用-STM32 control LCD instance, LCD is HB240128, has been included within the library can be used directly