ad采集的小模块，实现串口转并口的功能，串口是SPI的接口-ad collector modoudle ad ad ad ad ad da da da da shuzi moni moni shuzi caiji caiji caiji caiji caiji caiji caiji

该程序基于VHDL语言，利用EDA为平台来进行出租车计费系统的设计，采用了模块化的设计，带显示功能-The program is based on the VHDL language, the use of EDA as a platform for taxi billing system design, using a modular design, with display function