编码器-使用if else 语句

通过摄像头图像的提取，在FPGA开发板上实现的，主要实现了图像轮廓的提取(Extraction of the image through the camera, in the FPGA implementation of the development board, the main achievement of the image contour extraction)

this is a simulation fm in simulink mathlab this is one program with pll

本代码是基于可编程门阵列flield视频图形阵列实现。该代码是使用Verilog

说明：  verilog讲义 卡内基梅陇大学verilog课程讲义-unlocked 卡内基梅陇大学verilog课程讲义-unlocked(Verilog Course Lectures at Carnegie Mellon, University Verilog Course Lectures at Carnegie Mellon University Verilog Course Lectures at Carnegie Mellon University)

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.)

Fully parametrizable combinatorial parallel LFSR/CRC module. Implements an unrolled LFSR next state computation. Includes full MyHDL testbench.

IEEE1588de FPGA 程序，已测试，可直接用，方便(IEEE1588de FPGA program has been tested, can be directly used to facilitate)

1602是目前最常用的显示器件，本例是通过verilog 代码实现1602的显示(1602 display)

基于FPGA，利用vhdl语言结合matlab工具实现dds,已经仿真(Based on FPGA, VHDL language with matlab tools to achieve DDS, has simulation)

verilog编写的RTC（实时时钟）包含APB总线接口、时钟计时部分等(verilog prepared by the RTC (real time clock) contains APB bus interface, clock time some other)