sdram 代码

使用verilog作为CPU设计语言实现单数据通路五级流水线的CPU。具有32个通用寄存器、一个程序计数器PC、一个标志寄存器FLAG，一个堆栈寄存器STACK。存储器寻址粒度为字节。数据存储以32位字对准。采用32位定长指令格式，采用Load/Store结构，ALU指令采用三地址格式。支持有符号和无符号整数加、减、乘、除运算，并支持浮点数加、减、乘、除四种运算，支持与、或、异或、非4种逻辑运算，支持逻辑左移、逻辑右移、算术右移、循环右移4种移位运算，支持Load/Store操作，支持地址/立即数加载操作，支持无条件转移和为0转移、非0转移、无符号>转移、无符号<转移、有符号>转移、有符号<转移等条件转移。()

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.

uart串行口,用Verilog编写的.供大家参考-uart serial port, using Verilog prepared. For your reference

基于DE2-115开发板设计的一个数字钟，能进行正常的小时、分、秒计时功能，并分别由开发板上面的数码管显示秒（60s）、分（60min）、小时（24hours）的时间。并具有手动调整时间的功能(DE2-115 board design based on a digital clock, and enables the normal hours, minutes, seconds chronograph function, and were above the development board digital display seconds (60s), points (60min), hours (24hours) time . And has a function to manually adjust the time)

VHDL BASED DATA COMPRESSION

关于USB开发的verilog开发程序，非常的全面，学习FPGA开发时用得着。(About USB development verilog development process, very comprehensive, learning FPGA development time worthwhile.)

VHDL tutorial for beginning learner

用VHDL语言在FPGA上实现了fft算法和fir滤波

本文档介绍了通用异步收发器（UART）VHDL 组件，它可以使用，也可以与PmodRS232或与一个板上的RS232端口。一个UART 部件被用于转换串行数据为并行数据，并且并行数据为串行数据。串行 转移到UART数据被放置在一个输出总线经过了UART将其转换成并行 信息。该总线可以被用作输入到其它逻辑门阵列中。所得到的数据可 然后再次使用UART组件被送回了串行。

these are verilg prgms