VHDL语言设计数字系统，VHDL是Very High Speed Integrated Circuit Hardware Descr iption Language 的缩写，意思是超高速集成电路硬件描述语言。本课程设计分析了现代城市交通控制与管理问题的现状，结合城市交通的实际情况阐述了交通灯控制系统的工作原理。编写了程序控制8255A可编程并行接口芯片，使红、绿、黄发光二极管按照十字路口交通信号灯的规律交替发光，模拟了交通信号灯简单的工作。-VHDL language design digit

实验名称: SPI接口实险，LED数据管显示。 实验目的: 学习AVR单片机的SPI功能 实验现象: 1、程序通过SPI接口输出数据到HC595芯片驱动LED数据管简单显示。 2、内部1 M晶振，程序采用单任务方式，软件延时。-Experiment name: SPI interface, the real danger, LED data display tube. Experimental purposes: learning the AVR SPI function ex

自己写的一个移位寄存器的实例，该例子主要用来讲述verilog中的testbench的写作，以及在testbench中怎样使用task，以使仿真更加的高效简洁-Write your own instance of a shift register, which is mainly used to describe examples of verilog testbench writing, as well as how to use the testbench in the task, to m

Using mechanical switches for a user interface is a ubiquitous practice. However, when these switches are actuated, the contacts often rebound, or bounce, off one another before settling into a stable state. Several methods exist to deal with this te