本例是一个6层电梯的控制系统,VHDL原程序,状态机,控制器

控制电话信令 完成忙碌 等待 回铃音振铃等(Signaling complete control over telephone ring so busy waiting ringback tone)

直接数字频率合成器（Direct Digital Frequency Synthesizer：DDFS）的VHDL程序,开发环境是QuartusII,系统时钟为50MHz，由PLL产生DDFS的工作时钟166.67MHz,地址位宽为24位，频率字为20，相位字为10，RAM用于存储查找表，其地址位宽为10，数据位宽为8。-Direct Digital Frequency Synthesizer ( DDFS) of the VHDL program, the development environment is QuartusII, the system clock to 50MHz, the work of DDFS generated by PLL clock 166.67MHz, address bit-width of 24-bit frequency word is 20, phase word for 10, RAM used to store look-up table, its address is 10 bits wide, the data is 8 bits wide.

数字电路的设计。以软件方式实现硬件电路，功能强大，开发容易。(Digital circuit design. With software to realize the hardware circuit, powerful, development easy. )

很有用的10bit串并转换verilog程序，需要的可以拿去参考下，在quartusII上已验证过(Useful 10bit string and convert verilog program, need to take a reference, has been verified in quartusII)

用PrimeTime的技巧，解决复杂时钟问题。(The world of telecommunications chips is full of messy clocking situations. This paper will cover the tricks and tehniques that author Paul Zimmer has developed to avoid the need to pour over reams of timing reports looking for problems. Best paper winner at SNUG San Jose 2001!)

使用 System view 编程 QPSK(use System Programming view QPSK)

本代码主要功能是PPM解码，采用Verilog语言，通过移位寄存器和组合电路实现解码。(The main function of this code is PPM decoding.)

Time divisor vhdl code

本RAR包括《Verilog-HDL实践与应用系统设计》一书中的全部例子，这些例子全部通过了验证。第七章以后的设计实例，不仅有Verilog-HDL的例子，也附了包括VB、VC++等源程序,甚至将DLL的生成方法也详尽地作了说明。(The RAR includes " Verilog-HDL Practice and Application of system design," a book full of examples, all passed validation. Chapter VII of the future design examples, not only examples of Verilog-HDL, but also attached, including VB, VC++ source code, etc., and even DLL generation methods explained in detail.)

说明：  biss协议源码交流 verilog hdl源码，测试可用(Biss protocol ,achieved by verilog HDL,can be verify using modelsim or other simtools.)