verilog HDL verilog HDL verilog HDL

这是一个基本的ARM7_Core 有基本功能 但不是太完善-This is a basic ARM7_Core has the basic functions, but not too perfect

EDA 正弦信号发生器：正弦信号发生器的结构有四部分组成，如图1所示。20MHZ经锁相环PLL20输出一路倍频的32MHZ片内时钟,16位计数器或分频器CNT6，6位计数器或地址发生器CN6，正弦波数据存储器data_rom。另外还需D/A0832（图中未画出）将数字信号转化为模拟信号。此设计中利用锁相环PLL20输入频率为20MHZ的时钟，输出一路分频的频率为32MHZ的片内时钟，与直接来自外部的时钟相比，这种片内时钟可以减少时钟延时和时钟变形，以减少片外干扰 还可以改善时钟的建立时间和保持时间，是系统稳定工作的保证。CNT6用来将32MHZ进行8分频得到4096HZ的频率提供给CN6与data_rom时钟信号。由CLK端输入20MHZ的时钟信号，在DOUT端就可输出稳定的正弦信号。(Sine signal generator has the structure of four parts, as shown in figure 1 below. The 20 MHZ phase lock loop PLL20 output all the way of frequency doubled within 32 MHZ slice clock, 16 counter or prescaler CNT6, six counter or address generator CN6, sine data storage data_rom. In addition to D/A0832 (shown in not draw) will digital signal into analog signals. This design using the phase lock loop PLL20 input frequency for 20 MHZ clock, the output of the frequency of all points frequency of 32 pieces (MHZ clock, and comes directly from the external clock, compared to this piece of clock can reduce the clock in delay and clock deformation, to reduce the interference of Can also improve the establishment of the clock time and keep time, is the system stability of assurance. CNT6 used to will and to 8 MHZ get 4096 HZ dividing the frequency to provide CN6 and data_rom clock signal. The input by CLK 20 MHZ clock signal, in DOUT end can output stable sine signals. )

说明：  运用VHDL描述函数发生器的各个波形，可有构成多功能函数发生器。(VHDL description of the use of various function generator waveforms, can constitute a multi-purpose function generator.)

sparc org, vhdl rtl code

用Verilog HDL编写的PID程序代码，成功调试，运行良好。(The source code of PID in Verilog HDL.Simulation was successful.)

RS232的UART编程，包括波特率发生器模块，串口接受模块，串口发送模块(RS232 programming the UART, including the baud rate generator module, serial module to receive, send serial module)

在FPGA上实现声卡接口，电子琴，滤波比较器，最终实现语音通信 -In the FPGA to achieve the sound card interface, flower, filter comparators, the eventual realization of voice communications

平坦度检测中的高度检测算法，使用ISE开发环境，语言为VHDL，平台是XC3S4-a vhdl_program used for flat detect

BCH3.c,提供m<21以下的所有码长的BCH编解码模块。以供大家参考。谢谢(BCH encoder&decoder GF(2^m) m<21)

电子书籍 verilog HDL 数字设计与综合 夏宇闻所编写(electronic text Foreign electronic and communication textbooks)