PIC 单片机常用模块与综合系统设计实例精讲一书的源代码：IO输入输出模块，LCD液晶显示模块，定时器模块，比较与检测模块，步进电机模块，汽车应急启动器系统开发实例，AD模块，存储器模块 -Commonly used PIC microcontroller module with an integrated system design example to Jingjiang book s source code: IO input and output modules, LCD displa