used in the preparation of Verilog FLEX10K achieve simple CPU

基于FPGA设计的电子密码锁是一个小型的数字系统，与普通机械锁相比，具有许多独特的优点：保密性好，防盗性强，可以不用钥匙，记住密码即可开锁等。(FPGA-based design of the electronic code lock is a small digital system. It has many unique advantages：good privacy and security , it do not need the key but remember password to unlock, and so on while it compare to ordinary mechanical locks.)

设计的结构是纹波进位加法器，但执行的操作是加法和减法，两种操作都是32位的，具体取决于控制信号。如果控制信号为“1”，则选择减法，然后选择“0”，然后选择加法

说明：  led学习控制l44444444444444(led verilog led ccccccc)

FPGA上的VERILOG语言编程。通过查找表实现直接数字频率合成。在主控部分通过键盘选择正弦波，方波，三角波，斜波，以及四种波形的任意两种的叠加，以及四种波形的叠加；通过控制频率控制字C的大小，以控制输出波形频率，实现1Hz的微调；通过地址变换实现波形相位256级可调；通过DAC0832使波形幅值256级可调；通过FPGA内部RAM实现波形存储回放；并实现了每秒100HZ扫频。(FPGA on the verilog language programming. Lookup table through direct digital frequency synthesis. In part through the control of the keyboard to choose sine, square, triangle wave, sloping wave, and four arbitrary waveform two superposed and the stack of four waveform; by controlling the frequency control word on the size, in order to control the output waveform frequency, 1 Hz to achieve the fine-tuning; Address transform through waveform phase adjustable 256; DAC0832 so through waveform amplitude adjustable 256; FPGA through internal RAM to the waveform storage intervals; and achieve a 100 per second sweep 9999.)

学习DM642的开发板，适合DSP和pcb的初学者，容易上手(Learning DM642 development board)

the basic system of nexys3(soft core)

移位除乘法器带testbench好用的工程(Useful addition to the shift multiplier works with testbench)

针对AD9826驱动设计的Verilog代码，主要是配置ccd采样的设计(The Verilog code is designed for AD9826, to configuration ccd sampling )

可以给VHDL初学者看的实例，全部经过验证(VHDL beginners can see examples of all the proven)

六十进制计数器，显示0到60.可以用数码管显示。(Six decimal counter 0-60 can use the digital display.)