基于交叉开关的路由器

利 用 来 vhdl 设 计 p cm的 实 现-Vhdl design used for the realization of p cm

自己写的一个tcd1209d的时序驱动代码，是用verilog语言编写的，可以借鉴(Of write a tcd1209d of timing-driven code, Verilog language, can learn from)

许多非常有用的 Verilog 实例: ADC, FIFO, ADDER, MULTIPLIER 等(many very useful Verilog examples : ADC, FIFO, ADDER, MULTIPLIER etc.)

VHDL硬件描述语言与数字逻辑电路设计-VHDL hardware description language and digital logic circuit design

这里描述的VHDL源代码由若干模块下的释放

VHDL之二進制轉BCD碼之程式碼，算完整的(Of binary to BCD code VHDL code, operator complete)

spartanII 是xilinx公司提供的一款高性能FGPA芯片,本文详细介绍spartanII的体系结构和编程!-spartanII Xilinx is provided by a high-performance chip FGPA, spartanII This paper describes the architecture and programming!

北斗定位系统卫星下行信号的基带处理部分——基于FPGA的的直接序列扩频发射机的设计与仿真。，已通过测试。 (Beidou positioning system satellite downlink signal baseband part- based on the design and simulation of the FPGA direct sequence spread spectrum transmitter. , Has been tested.)

如上图所示， Rst是低电平有效的系统复位信号，Clk是时钟信号。AB[5：0]是地址信号，DB[7：0]是数据信号，wr是低电平有效的写信号。start是启动信号。 模块中有一个64x8的双端口的存储器。系统复位结束后，可以通过AB、DB和wr信号向同步存储器写入数据。当写入64个数据后，给出一个Clk周期宽度的脉冲信号start，则系统从存储器0地址处开始读出数据，读出的8位数据从低位开始以3位为一组，每个时钟周期输出一组，即第一个时钟周期输出[2：0]位，第二个时钟周期输出[5：3]位，第三个周期输出1地址的[0]位和0地址的[7：6]位，直至将存储器中64x8数据全部输出。若最后一组不足三位，则高位补0。 (As shown above, Rst is an active-low system reset signal, Clk is a clock signal. AB [5: 0] is the address signal, DB [7: 0] is the data signal, wr write signal is active low. start is the start signal. Module in a dual port memory of 64x8. After the reset, you can write data to the synchronous memory by AB, DB and wr signals. When data is written to 64, given the width of a pulse signal Clk cycle start, the system begins to read the memory address 0, 8 data read out a low starting with three as a group, each clock outputs a set period, which is the first clock cycle of the output [2: 0] bits, the second clock cycle output [5: 3] position, the third cycle of the output of an address [0] and 0 address [7 : 6] bit, until all the data in memory 64x8 output. If the last group of less than three, the high 0s.)

层合板的刚度的计算和验算，包括拉伸刚度A、弯曲刚度D以及耦合刚度B。 首先要给定层合板的各个参数，具体有：层合板的层数N；各单层的弹性常数E1、E2、 、G12；各单层对应的厚度；各单层对应的主方向夹角 。(The stiffness of laminated plates is calculated and checked, including tensile stiffness, A, flexural stiffness, D and coupling stiffness B. First of all, it is necessary to give the parameters of laminated plates, such as the number of plies N, the elastic constants of each layer, E1, E2, and G12, the thickness of each monolayer, and the angle of the main direction corresponding to each single layer.)