基于NiosⅡ的2 de2_tvproject

basic verilog code on siso, piso, sipo

采用FPGA实现的DDS波形发生器源码，可以实现频率幅值变换、正弦波、方波、三角波输出，输出频率可达1MHz(FPGA implementation of the DDS waveform generator source frequency amplitude transform, sine wave, square wave, triangle wave output, the output frequency up to 1MHz)

说明：  一个小寄存器堆，使用参数化编程，附有仿真代码，可直接在vivado（2018.2版本及以后）上运行(A small register heap, using parametric programming)

应用背景此代码是用于执行器和传感器，可以在网络中实现一个很好的连接与其他节点和主。关键技术VHDL代码 ；可以控制位CRC校验和填料-掩模的验收规范

Top module name : SHIFTER (File name : SHIFTER.v) 2. Input pins: SHIFT [3:0], IN [15:0], SIGN, RIGHT. 3. Output pins: OUT [15:0]. 4. Input signals generated from test pattern are latched in one cycle and are synchronized at clock rising edge. 5. The SHIFT signal describes the shift number. The shift range is 0 to 15. 6. When the signal RIGHT is high, it shifts input data to right. On the other hand, it shifts input data to left. 7. When the signal SIGN is high, the input data is a signed number and it shifts with sign extension. However, the input data is an unsigned number if the signal SIGN is low. 8. You can only use following gates in Table I and need to include the delay information (Tplh, Tphl) in your design.

执行 256 点， 基数 4 IFFT 算法，提出了一种高速和 16 位复杂 IFFT。通过 使用固定的几何寻址模式，管道设计和块浮点 结构，数据具有更高的精度和动态范围。建议 本文分析了逻辑大小、 面积、 功耗的体系结构 使用 Xilinx 8.2。

《可综合的Verilog语法》国外著名大学老师编写，对于理解verilog HDL文件的可综合与不可综合会有帮助。-synthesizable Verilog syntax and semantics,by teachers from university of Cambridge,It is userful for verilog HDL design.

封装PS2接口驱动，用verilog编写！适用于键盘，鼠标等PS2接口的器件。(failed to translate)

VHDL实现ALU的源代码，并且提供了一个详细的testbench！-ALU VHDL source code, and provide a detailed testbench!

通过监测工作状态实现带有IIC通讯功能的数据发送接收(to implement the sending and receiving data function of iic communication )