锁相环Verilog代码

一种实现计算机接口rs232与FPGA通信的基于VHDL语言设计的一段非常简洁的程序(A RS232 computer interface implementation with FPGA-based VHDL language communications designed a very simple procedure)

ip core of the transceiver gtx

在BASYS3上实现跑马灯的功能。第一LED交替闪烁；第二LED由左至右逐个变亮，再逐个变暗；第三LED由右至左逐个变亮，再逐个变暗；第四LED由两边逐个变亮，再从中间逐个变暗。(Realize the function of the horse light on BASYS3. The first LED flashes alternately; second LED brightens from left to right and then darkens one by one; the third LED turns from right to left, then darkens one by one, and then darkens one by one; fourth LED is brightened by both sides, and then darkening from the middle.)

多功能数字钟，在quartusII软件平台上实现的verilog源代码。大家试试看。(Multifunctional digital clock in quartusII software platform to achieve the verilog source code. We try.)

对pci9054芯片的配置进行了设置，并对PCI9054的各状态机进行了设置，程序经过了测试(Pci9054 chip on the configuration of the set, and each state machine PCI9054 been set, the program have been tested)

基于VHDL语言的串口发送和接收程序,自己调试通过，并已经运用在工程中(Based on the serial port to send and receive procedures VHDL language, its own debugging, and has been used in the project)

自编的64B/66B编码程序，下次上传解码程序。(the 64B/66B coding process is written by myself, i will upload the decoding process next time.)

这是IIc才程序，验证完成，可以直接复用，不许更改，有详细的文档介绍，和对应的代码

跨时钟同步功能的Verilog代码，有两个文件，signal_sync和crossdomain_signal module signal_sync ( clk_i, rst_i, signal_i, signal_o, valid_o, edge_o, posedge_o, negedge_o ); module crossdomain_signal (     input         reset,     input         clk_b,     input         sig_domain_a,     output        sig_domain_b );

锁相环是通信领域最基本的元件，同时在FPGA上也有广泛的应用，本代码是锁相环PLL的Verilog HDL代码，简单易读，能够实现PLL基本的锁相、分频等功能