这是可编程逻辑器件（CPLD）初学者的入门级文章，仅供参考。...

这是一个EOS项目中的GFP成帧结构，能够容错，可以配置字节域(This is an EOS project GFP Framing structure, be able to fault-tolerant, can be configured byte domain)

采用Verilog HDL设计,在掌宇智能开发板上得到实现 根据抢答器的原理，整个电路可划分为三部分：采样电路、门控电路和译码电路- Uses Verilog the HDL design, obtains the realization basis on the palm space intelligence development board to snatch the answering principle, the entire electric circuit may divide is three parts: The sampling electric circuit, the gate control the electric circuit and the decoding circuit

说明：  实现ARP、ICMP、UDP、TCP、IP和MAC全过程的传输，对TCP的连接、接收、发送、断开均经过测试，功能正常(Realize the transmission of ARP, ICMP, UDP, TCP, IP and MAC in the whole process, test the connection, reception, transmission and disconnection of TCP, and the function is normal)

verilog 我自己写得按单脉冲发生器，通过了综合和仿真，和频率可变的正弦波发生器，-verilog I write by a single pulse generator, through the synthesis and simulation, and variable frequency sine wave generator,

SHIFT_8REG是8位的一个具有移位功能的寄存器，每一次数据打入都会从这个寄存器的最低位打入，并相应进行向左移位。 ODD_110BREG是一个3位的备份寄存器，寄存器中存放的是奇数帧的同步头，也就是110。 EVEN_9BHREG是一个8位的备份寄存器，寄存器中存放的是偶数帧的同步头，也就是10011011。这两个寄存器的初始值在系统一开始就打入。 -SHIFT_8REG is eight with a displacement of the functional Register, Each will enter the data from the register into the lowest point, and the left shift accordingly. ODD_110BREG is a three backup Register, the Register is stored in the odd frame synchronization head, is 110. EVEN_9BHREG 8 is a backup Register, which register is kept even the first frame synchronization, is 10011011. This register the two initial value of the system into a start.

verilog实现的“BCD/七段译码器”。-verilog implementation " BCD/Seven-Segment Decoder."

modelsim仿真，大量vhdl程序，验证，很有价值！(The ModelSim Simulation, a large number of VHDL procedures, validation, great value!)

可实现任意频率的LED点灯形式，只需改变分频次数和赋值就可以得到想要的的结果。可实现任意频率的LED点灯形式，只需改变分频次数和赋值就可以得到想要的的结果。可实现任意频率的LED点灯形式，只需改变分频次数和赋值就可以得到想要的的结果。可实现任意频率的LED点灯形式，只需改变分频次数和赋值就可以得到想要的的结果。可实现任意频率的LED点灯形式，只需改变分频次数和赋值就可以得到想要的的结果。可实现任意频率的LED点灯形式，只需改变分频次数和赋值就可以得到想要的的结果。可实现任意频率的LED点灯形式，只需改变分频次数和赋值就可以得到想要的的结果。可实现任意频率的LED点灯形式，只需改变分频次数和赋值就可以得到想要的的结果。可实现任意频率的LED点灯形式，只需改变分频次数和赋值就可以得到想要的的结果。

EDA 双向端口的输入输出程序 快点来下在啊 -EDA port bi-directional input and output procedures to hurry up in the ah

CAN驱动器MCP2515驱动，verilog编写，实测可用(CAN driver MCP2515 driver, Verilog written, measured available)