fpga VHDL语言，控制DDS产生频率可变的正弦波信号扫频

说明：  在FPGA上实现CAN总线SPI接口通信，使用Verilog语言(Realize SPI interface communication of CAN bus on FPGA, using Verilog language)

一个2位的BCD码十进制加法计数器电路，输入为时钟信号CLK，进位 输入信号CIN，每个BCD码十进制加法计数器的输出信号为D、C、B、A和进位输出信号COUT，输入时钟信号CLK用固定时钟，进位输入信号CIN. (A 2-bit BCD code decimal adder counter circuit input as the clock signal CLK, a carry input signal CIN, D, C, B, A, and the carry output signal COUT, each BCD code decimal adder counter' s output signal, the input clock signal CLK Fixed clock, binary input signal CIN.)

一个FIR低通滤波器,最小阻带衰减-30db,带内波动小于1db．用MAXPLUS2设计与仿真。-This is a FIR LPF, with-30dB in stop-band and sigma is less than 1dB. It is designed and simulated on MAXPLUS2.

Configurable cpu core that supports Z80, 8080 and gameboy instruction sets

交通灯控制（VHDL）-Traffic Light Control (VHDL)! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !

BCD码减法实现程序，非常完整，采用Verilog HDL语言实现。(BCD subtraction to achieve program code, very complete, using Verilog HDL language.)

说明：  credit base network on chip(network on chip (noc))

this is a Multiplier and Accumulate (MAC). written in VHDL

硬件描述语言,verilog HDL,实现了解码器的设计-hardware description language, verilog HDL, the decoding of Design

在FPGA上编写的通过SPI总线配置外部DAC芯片DAC5686的程序，通过板级调试，验证可用。程序通过状态机实现，将需要配置的寄存器值转为SPI总线的数据格式发送出去。 (Configure external DAC chip DAC5686 via SPI bus program on FPGA written by board-level debugging, verification is available. Program through the state machine, you will need to configure the register values 椠渀琀漀 SPI bus data format sent.)