检测上升沿的verilog程序，有验证程序，可用synplify验证

数码管显示有片选 模块 四输入，与其他模块相连即可使用-digital film of the election showed that four input modules, and other modules can be linked to the use of

256字节深度的RS232串口程序,共分4个模块,顶层文件FIFO程序串口收和串口发.经过测试已用于产品.可靠!-Depth of 256-byte Serial RS232 procedures, divided into four modules, top-level document procedures FIFO serial and serial-fat collection. After the test has been used in products. Reliable!

针对32位MIPS微处理器中CLZ指令（对单个字高位连零进行计数）的实现电路，使用了类似于超前进位的逻辑结构。包含测试文档，以及Design Compile所用的环境和脚本。(The CLZ instruction counts the number of leading zeros in a word. The 32-bit word in the GPR rs is scanned from most-significant to least-significant bit.The number of leading zeros is counted and the result is written to the GPR rd. If all 32 bits are cleared in the GPR rs, the result written to the GPR rd is 32. )

A multiplier unit in VHDL

为了便于信号发射，提高信道利用率、发射功率效率以及改善通信质量，人们研制出各种通信信号的调制样式。尽管调制样式多种多样，但实质上调制不外乎用调制信号去控制载波的某一个（或几个）参数，使这个参数按照调制信号的规律而变化。调制信号可以分别“寄生”在已调信号的振幅、频率和相位中，相应的调制就是调幅、调频和调相这三大类熟知的调制方式。 MSK信号就是调频这一大类中的一种相位连续的移频键控。其主要特点是包络恒定，带外辐射小，实现较简单，可用于移动通信中的数字传输 -see up

基于verilog的1588V2协议的fpga实现，目前项目通用代码，供大家参考(Based on verilog 1588 v2 fpga implementation of the agreement, the project general code, for your reference)

基二8点fftverilog实现。经过modelsim仿真通过(Base 2 fftverilog implementation at 8 o clock. Go through the modelsim simulation)

FPGA控制m25p16flash芯片读写控制spi协议 可实现擦除写入读出功能(SPI protocol for read and write control of m25p16 flash chip controlled by FPGA Erase Write-Read Function)

it contains pdf file which has vhdl program of uart (universal asynchoronus receiver and transmitter). which very simple and easy to understand

与IP核配套的I2C-Master Core，包含了目前主流FPGA芯片的I2C实现，代码包括Altera/Xilinx/OpenCore等公司的VHDL/Verilog/C等。(I2C-Master Core)