4-Bit BCD Adder in Verilog

采用FPGA实现打车计程系统设计，实现自动计程及计费，本内容包括硬件程序设计及基于QUARTUS软件的仿真

verilog代码实现的数字密码锁。通过4个并行的10位移位寄存器，分别记录在时钟上升沿时A,B,C,D的输入情况，比如某上升沿输入A，相应时刻A对应的移位寄存器输入1，其他三个移位寄存器输入都为0.另外4个并行的10位寄存器记录密码。这样，密码锁不仅可以识别字符数量，还可以判断出字符的输入次序。(verilog code of digital lock. By four parallel 10-bit shift register, respectively, recorded in the clock rising edge A, B, C, D of inputs, such as a rising edge of input A, the corresponding moments A 1 corresponding to the input shift register, the other three shift bit register inputs are 0. another four parallel 10-bit registers record the password. This lock can not only identify the number of characters, you can also determine the character of the input sequence.)

标准电视信号的同步生成程序，利用VHDL和原理图，利用Quartus综合-Standard television signal to generate the synchronization procedures, the use of VHDL and schematic diagram, using Quartus integrated

uart documentation, july 17, 2019. the document describes the basics of verilog programming and how to implement them on an fpga device

实现verilog读写txt文件，从sut.txt从读取数据，进行操作后，写入out.txt(Realize verilog read and write txt file)

圖形介面乘法器,也可自行使用verilog去改(Graphical interface multiplier, also free to use verilog go and change)

有关gal器件的编程入门，以及常见逻辑门、计数器VHDL程序(For gal device programming entry, as well as common logic gates, counters VHDL program)

Computer Architecture Handbook on Verilog HDL

如果不考虑占空比，直接利用计数器来进行分频，则占空比会发生变化。下面程序实现1：1的三分频。-if not duty cycle directly counter to the use of sub-frequency, duty cycle will change. Below a program : a third of the frequency.