Vending machines, coin

说明：  内部含3个模块，使用DDS产生200k与500k的正弦波，两者相加后过数字低通滤波（通带0-200k，阻带400k以上），并将波形输出，实测FFT分析中看不到500k分量。其中数字滤波器采用MATLAB设计（FIR+等波纹，阻带衰减-80dB）(There are three modules in the system. DDS is used to generate 200K and 500K sine waves. After adding the two modules, the digital low-pass filter (passband 0-200k, stopband above 400k) is used, and the waveform is output. 500K component can not be seen in the actual FFT analysis. The digital filter is designed by MATLAB (FIR + equal ripple, stopband attenuation - 80dB))

VHDLVERILOG语言实现的CARDBUS的IP源码,已经实现现场应用-CARDBUS IP CORE

关于i2c master/slaver control 方面的技术资料 介绍其特色与使用方法(On the i2c master/slaver control of technical information on their characteristics and use)

6级流水，verilog实现浮点数的加法，其中浮点数格式符合IEEE754标准-6 water, verilog realize the floating point adder, in which floating-point format in line with the IEEE754 standard

异步的fifo,写时钟和读时钟相互独立，能够对数据进行缓存处理。希望对大家有用(Asynchronous fifo, write clock and the read clock independent of each other, capable of processing the data cache. I hope useful)

可生成rom.初学者可以看看。很不错的。理解后生成rom很容易的。(LPM_ROM .It is good for VHDL new learner)

说明：  学习VHDL可以用得上，有很多实例，可以对照着自己写一些东西(VHDL can be useful to learn, there are many examples, can be done to write something)

东芝ccd产品tcd1209驱动程序，生成1209所需的驱动波形(toshiba ccd tcd1209 )

比较实用的ps2键盘源码 可以在SOPC中进行添加组件 以实现自己所需的功能-Comparison of practical ps2 keyboard source code can be carried out in the SOPC components add to the functionality required to realize their own

数字滤波器的C语言实现，，包含高通、低通、带通滤波器 (The C language implementation of the digital filter, including the high-pass, low pass, band-pass filter)