该文档 提供了一种单片机IO直接驱动段式液晶的方法，里面有驱动原理介绍，驱动方法介绍，并含有驱动源代码，和最后效果图-This document provides a single-chip IO Segment LCD direct drive method, which has driven the principle of introduction, driving methods introduced, and contains driver source code, and the f