spi flash 控制器设计

OFDM系统中的相位跟踪模块（Phase_Tracking）的FPGA实现-Phase_Tracking in OFDM sysytems

此程序完成了FLASH的擦除，读写的功能，并通过USB芯片FT245传送到PC...............................................................................................................................................................................................

  基于FPGA(Field-Programmable Gate Array)的OFDM(Orthogonal Frequency Division Multiplexing)信号传输系统VHDL源码 use IEEE.std_logic_unsigned.all; package outconverter is constant stage : natural := 3; constant FFTDELAY:integer:=13+2*STAGE; constant FACTORDELAY:integer:=6; constant OUTDELAY:integer:=9; function counter2addr( counter : std_logic_vector; mask1:std_logic_vector; mask2:std_logic_vector ) return std_logic_vector; function outcounter2addr(counter : std_logic_vector) return std_logic_vector; end outconverter; package body outconverter is function counter2addr( counter : std_logic_vector; mask1:std_logic_vector; mask2:std_logic_vector ) return std_logic_vector is variable result :std_logic_vector(counter"range); begin for n in mask1"range loop if mask1(n)="1" then result( 2*n+1 downto 2*n ):=counter( 1 downto 0 ); elsif mask2(n)="1" and n/=STAGE-1

本源码为Nios II的开发示例,主要演示基于Nios II的uCOS的移植。开发环境QuartusII。 本示例十分经典，对基于SOPC开发的FPGA初学者有很大帮助。(The source code for the Nios II development of examples, mainly based on the Nios II shows the uCOS transplant. Development environment QuartusII. This example is very classic, FPGA-based SOPC development of great help for beginners.)

通过代码控制音频编/解码硬件芯片WM8731， 通过按键控制音频输出的音量(Audio codec hardware chip WM8731 is controlled by code, and audio output volume is controlled by keys.)

Verilog code for RS-(255,239) encoder.

频率计介绍了用VHDL语言编写的频率计的程序，详细编写了如何测频，如何计数频率。-Cymometer introduce VHDL language with the frequency of the procedure in detail how to prepare a frequency measurement, how to count the frequency.

说明：  VHDL语言100例详解。详细讲解了用VHDL语言进行数字电路和数字系统设计的知识。用100个实例，不仅进行基础的门电路设计，而且还有较为复杂的数字系统设计。这些实例可以直接被调用。(VHDL Elaborates on 100 cases. Detailed account of VHDL for digital circuits and digital systems design knowledge. With 100 examples, not only for infrastructure gate design, but also more complex digital system design. These examples can be called.)

thesis for simple virus detection processor which is developed in xilinx

用modelsim仿真一个正弦波产生程序-modelsim simulation using a sine wave generated procedures