verilog，4、5分频器，5分频器占空比3：2

XAPP134 SDRAM VHDL design file

说明：  CPU课程设计要求以FPGA开发平台为例，分析 CPU 设计的流程与仿真。 本次开发使用的硬件描述语言是 Verilog 语言，使用的指令系统是一个以 MIPS 指令集为子集的指令系统，共 22 条指令，所用的设计仿真软件Modelsim。(CPU curriculum design requires FPGA development platform as an example to analyze the process and Simulation of CPU design. The hardware description language used in this development is Verilog language, and the instruction system used is an instruction system with MIPS instruction set as a subset, with 22 instructions in total. The design simulation software Modelsim is used.)

《Verilog HDL 程序设计教程》6-"Verilog HDL Design Guide" 6

可综合的vhdl设计特点.pdf-synthesizable VHDL design features. Pdf

小家电常用芯片HT66F0185的UART 使用例子，已在产品使用(Small appliances commonly use UART chip HT66F0185 of example, has been used in products)

说明：  实现24小时计时，因为位数不够，这里是12进位，可自行调整进位数(Realize 24-hour timing, because the number of digits is not enough, here is 12 carry, you can adjust the carry number by yourself.)

三层电梯的详细电路 Foundation版 包括强行开关门打断(Elevator control Foundation project)

频率计VHDL编程。设计一个4位数字显示的十进制频率计，其测量范围为1MHz，测量值通过4个数码管显示以8421BCD码形式输出，可通过开关实现量程控制，量程分10kHz、100kHz、1MHz三档(最大读数分别为9.999kHz、99.99kHz、999.9kHz)； 当输入信号的频率大于相应量程时，有溢出显示。 -Cymometer VHDL programming. Design of a 4-digit decimal display frequency, the measurement range of 1MHz, the measured value through the four LED 8421BCD code shows the form of output can be controlled through the switch range, range at 10kHz, 100kHz, 1MHz Three (maximum reading were 9.999kHz, 99.99kHz, 999.9kHz) when the input signal is greater than the corresponding frequency range, it shows overflow.

I am in need of some codes of HDL

vhdl语言实现的频率发生器，可以产生不同的频率-A frequency generator wirriten by VHDL, which can generate different frequecies.