dct1d核心的FPGA实现

使用STM32官方提供的DSP库进行FFT，虽然在使用上有些不灵活（因为它是基4的FFT，所以FFT的点数必须是4^n），但其执行效率确实非常高效，看图1所示的FFT运算效率测试数据便可见一斑。该数据来自STM32 DSP库使用文档(. Using the official DSP library provided by STM32 for FFT is not flexible in use (because it is the FFT of base 4, so the number of FFT points must be 4 ^ n), but its execution efficiency is really very efficient, as can be seen from the test data of FFT operation efficiency shown in Figure 1. This data comes from STM32 DSP library usage document)

vhdl code for GIF Image Viewer

说明：  直接数字式频率合成器DDS设计、Verilog。 产生的信号可以是正弦波或方波、三角波、锯齿波等，自选。 采用DDS技术，将所需生成的波形写入ROM中，按照相位累加原理合成任意波形。 此方案得到的波形稳定，精度高，产生波形频率范围大，容易产生高频。 本实验在设计的模块中，包含以下功能： （1）通过 freq 信号输入需要的频率的值； （2）通过 wave_sel 信号选择所需的波形； （3）通过 amp_adj 信号选择波形放大的倍数。(DDS design of direct digital frequency synthesizer, Verilog. The generated signal can be sinusoidal or square wave, triangular wave, sawtooth wave and so on, optional. By using DDS technology, the required waveforms are written into ROM, and arbitrary waveforms are synthesized according to the principle of phase accumulation. The waveform obtained by this scheme is stable, accurate and easy to generate high frequency waveform. This experiment includes the following functions in the designed module: (1) Input the required frequency value through freq signal; (2) Choosing the required waveform by wave_sel signal; (3) Select the multiplier of waveform amplification by amp_adj signal.)

maxplus2为开发环境 vhdl编写的自由 计数器 程序-maxplus2 VHDL environment for the development of free counter preparation procedures

说明：  系统介绍了数字开发系统平台FPGA设计中的部分技巧 对于FPGA开发研究人员具有一定的指导和帮助意义(Systematic introduction of digital development platform FPGA design techniques for FPGA development of some of the researchers have some sense of guidance and help)

verilog 编写基于SRAM(CY7C1041)的代码-Verilog prepared based on the SRAM (CY7C1041) code

从FPGA输出到HDMI Tx的verilog 模块。实现完整HDMI图像输出功能。(FPGA output to HDMI Tx module in verilog)

若农场路无车辆，则在高速路保持绿灯。在探测农场路有车辆，高速路上的交通灯应由绿到黄，再到红，并允许农场路方向灯变绿，绿灯亮一段时间，由绿变黄再到红。(If there is no vehicle on the farm road, keep the green light on the highway. There are vehicles on the farm road, the traffic lights on the high speed road should be green to yellow, and then red, and allow the farm road lights to turn green, the green light for a period of time, from green to yellow, then to red.)

8051的verilog实现，内附testbench,c语言调试程序-8051 verilog achieve, enclosing testbench, c language debugging procedures

Verilog经典教程，很好的学习Verilog的书籍，对学习硬件编程很有帮助。(Verilog classic handbook, good learning Verilog books, to learn hardware programming helpful.)