全加器的VHDL程序实现及仿真

说明：  DA芯片输出控制 SPI协议 只写不读 FPGA用 verilog(DA-chip SPI protocol output control does not read write-only FPGA with verilog)

LCD Interface_Xilinx.CPLD源码参考设计(LCD Interface Xilinx CPLD)

基于状态图的光电编码器4倍频vhdl程序，输入相位差90度的两相，输出倍频和方向信号-Based on the state of the optical encoder Figure 4 multiplier vhdl procedure, enter a 90-degree phase difference of two-phase, frequency and direction of the output signal

文章运用分级抽取和多相滤波的方法改进传统CIC滤波器的结构,降低了系统工作频率,运用幅度改进函数(ACF)和外加级联余弦预滤波器的技术改进了滤波器频率响应,提出了一种高效的算法结构,改善了通带损耗,增大了阻带衰减,对CIC滤波器的实际应用和深入研究有着现实意义。 (Article the use of hierarchical multi-phase extraction and filtering methods to improve the structure of the traditional CIC filter, reducing the system operating frequency, the use of margin to improve the function (ACF) and the cosine cascade plus pre-filter technology to improve the filter frequency response, the an efficient algorithm to improve the pass-band loss, increases the stopband attenuation of the CIC filter in practical applications and in-depth study has practical significance.)

基于NiosII系统的可以在DE2-115板子上运行的吞食蛇游戏！（可以使用RS2键盘进行控制）(DE2-115 board NiosII system swallowed snake game! , (RS2 keyboard control))

状态机的典型饮用，可供学习模仿之用，四个状态，简单易学(State machine of the typical drinking, can be used to learn to imitate, four state, easy to learn)

出租车的计费功能的实现,计量模块、计费模块、控制模块、译码模块。(taxi fee)

用窗函数法设计一个线性相位FIR数字低通滤波器，用理想低通滤波器作为逼近滤波器，通带截止频率为0.2 ，阻带截止频率为0.4 ，阻带衰减不小于-40dB。(Window function method to design a linear phase FIR digital low-pass filter, as an ideal low-pass filter for approximation filter passband cutoff frequency of 0.2 stopband cutoff frequency of 0.4, the stop-band attenuation of less than-40dB.)

16位的移位寄存器，加上testbench,可以在modelsim里面运行~-16 of the shift register and testbench, modelsim the inside running ~

适用于FPGA的SOPC方面的元器件添加，如COMPNENT-Applicable to FPGA-SOPC area to add components, such as COMPNENT