数字频率计 FPGA 用verilog语言编写

单片机通过总线，将占空比和频率送到CPLD/FPGA中，并控制PWM输出.采用Verilog HDL语言编写。(Microcontroller by bus, the duty cycle and frequency sent to the CPLD/FPGA in, and control the PWM output. Using Verilog HDL language.)

FPGA Verilog控制FLASH片外读写(Verilog Controls FLASH Out-of-Chip Read-Write)

七人表决器，当有四人或四人以上的人同意是，表决通过。每个裁判控制一个开关，高电平表同意，在quartusII上用全加器来实现，当表决通过时，实验箱上的LED灯亮

基于FPGA的DDS信号源设计，32位相位累加器，产生可调频率(FPGA-based DDS signal source design, 32-bit phase accumulator to generate tunable frequency)

DDS中的正余弦生成，初始相位相差90度，可自行改变输出频率(Cosine generation of DDS, the initial phase difference of 90 degrees, the output frequency can be changed on their own)

vhdl code for alu and detemines the basic components of alu unit in cpu system

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)

VHDL_count 从 0 到 9 4 7 段 LED 显示器 (đếm 0 đến 9 hiển 施耐 4 带领 7 đoạn)

可以实现DDC各个模块的功能，如内插、抽取、FIR滤波等功能(DDC can realize the function of each module, such as interpolation, extraction, FIR filtering)

针对Altera的DE2/ DE1交互板的音频核心的音频编解码器（编码器/解码器），并提供了音频输入和输出的接口。(The Audio Core interacts with the Audio CODEC (enCOder/DECoder) on the Altera DE2/DE1 Boards and provides an interface for audio input and output.)