SDRAM基础性控制核 很有用的 VHDL状态机实现

ADS7870 Serial ADC Interface Using a CPLD, The system includes an XPLA3 CoolRunner CPLD, a Texas Instruments ADS7870 ADC, and a Toshiba SRAM, All related VHDL source code is provided

这是脉冲宽度调制技术的VHDL代码，包括一个比较器，正弦波发生器，锯齿波发生器，脉冲宽度调制器等。

UART功能,可以增加在NIOS2內,主要來做外部Flash的擦除及寫入,需搭配上位機傳輸字串來控制(UART function, can increase the NIOS2, the main external Flash to do the erase and write, to be a string with the host computer to control the transmission)

I2C verilog 源代码 非常好的代码，大家可以-I2C verilog source code for a very good code, we can

dds ad9910配置的verilog hdl程序，模块化设计，输入待配置的数据，字长，启动信号，即可自动产生时序，完成一次配置，模块还有done握手信号，方便用户调用时，反复多次配置。(dds ad9910 configuration verilog hdl program, modular design, the input data to be configured, word length, the start signal, the timing can be automatically generated, complete a configuration, the module has done handshake, user-friendly call, repeatedly configuration .)

这是用VHDL编写的FPGA与计算机进行串口通信的程序和一个LED程序-VHDL and FPGA prepared by the computer serial communication procedures and an LED procedures

Synthesizable model of Atmel ATmega103 microcontroller. (VHDL IP)-Synthesizable model of Atmel Application of ATmega103 mi crocontroller. (VHDL IP)

Advanced FPGA Design Architecture, Implementation, and Optimization

　　本文对数字基带信号脉冲成型滤波的应用、原理及实现进行了研究。首先介绍了数字成型滤波的应用意义并分析了模拟和数字两种硬件实现方法，接着介绍了成形滤波器设计所需要MATLAB软件，以及利用ISE system generator在FPGA上进行滤波器实现的优势。文中给出了成形滤波函数的数学模型，讨论了几种常用成形滤波函数的传输特性以及对传输系统信号误码率的影响。然后介绍了本次设计中使用到的数字成形滤波器设计的几种FIR滤波器结构。把各种设计方案进行仿真，比较仿真结果，最后根据实际应用的情况并结合设计仿真中出现的问题进行分析，得出各种设计结构的优缺点以及适合应用的场合。(In this paper, the application of the principles and implementation of digital baseband signal pulse shaping filter is studied. First introduced the significance of digital shaping filter application and analysis of both analog and digital hardware implementation, then introduces the shaping filter design requires MATLAB software, and the use of ISE system generator on the FPGA to achieve the advantages of the filter. This paper presents a mathematical model of shaping filter function, the transmission characteristics discussed several common shaping filter functions and the impact on the error rate of the signal transmission system. Then introduced the use of this design to several digital shaping filter design FIR filter structure. The various design simulation, compare the simulation results, and finally according to the actual application and combine design simulation to analyze problems, come and where appropriate to the application advantages and disadvantages of various design s)

it will count the bit