du to fpga 4*4 keyscan verilog

verilog 编写的I2C程序，控制D/A的(I2C program written by Verilog to control D/A)

VGA计数，PSW2控制正逆计数，按下递减计数，弹起正向计数。利用VGA作为输出设备，显示计数值。-VGA count, PSW2 inverse control is counting? Reduced count, pop-up being counted. The use of VGA as the output equipment, revealed count.

说明：  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)

ATSHA204_S加密芯片资料，学习使用该芯片必读资料(ATSHA204_S encryption chip data, required reading for learning to use the chip)

FPGA based design and Implementation of Advanced Encryption Standard

温湿度传感器sht30驱动，系统时钟为125M可读出温湿度。(sht30 driver,sysclk=125MHZ)

说明：  Verilog简易教程，或者说是讲义，清晰易懂，适合初学者入门使用(Layman' s Guide to Verilog, or a lecture, legible entry to use for beginners)

本程序为24小时计时器，稳定无误差。简单好用，是Verilog HDL语言初学者的指引。-This procedure for 24-hour timer, stable error-free. Easy-to-use, is the Verilog HDL language beginners guide.

描述Bayer图像无损压缩的一种先进算法及其如何在FPGA上实现(Description Bayer Image is an advanced lossless compression algorithms in the FPGA to achieve and how)

NiosII_Exercises_Ver3,this niosII 3.o for cyclone