一种新型基于双口ram的异步fifo

在nios系统开发中的驱动i2c音频电路的代码,包括verilog代码,与相应的驱动代码(In the nios system development in the driver i2c code for the audio circuitry, including the verilog code, and the corresponding driver code)

其中两个项目自己做的：一个是雷达模拟跟踪，基于FPGA/CPLD的，里面包含了PCB和VHDL码，还有一个是SDIO的驱动程序（包括PCB原理图，SDIO协议方面的资料还有就是源码，这项目可用），还有一些嵌入式方面的资料，如TCP/IP协议栈的实现，FPGA的一些仿真实例(Two of the projects themselves to do: a tracking radar simulator is based on FPGA/CPLD)

说明：  是基于apb总线下的timer外设的rtl代码，主要包括apb_timer的master逻辑verilog，以及相应的开发文档，包括寄存器的描述，功能特性等。(RTL code is based on timer peripheral under APB bus, which mainly includes master logic Verilog of apb_timer and corresponding development documents, including the description of registers, functional characteristics and so on.)

实现音频的I2S通信，音频柱的显示，及其噪声的处理等功能(Realization of audio I2S communications, audio column display, and its noise processing, and other functions)

说明：  CFI控制器顶层模块，32位wishbone总线经典接口，用于简化对CFI flash(如块)的访问解锁、删除和编程。(Top level of CFI controller with 32-bit Wishbone classic interface)

amba apb协议v2.0 verilog和数据表

说明：  lvds_rx IP核硬件设计代码，使用时注意LVSD_RX模块的延时参数的设置，3.5倍时钟相位的设置(Lvds IP core hardware design code, when using the attention LVSD module delay parameter settings, 3.5 times the clock phase settings)

说明：  FPGA与PC端实现串口数据的收发，先从PC端接收数据，然后发回给电脑，可通过串口助手验证。(The serial port data is sent and received between the FPGA and the PC. First, the data is received from the PC, and then sent back to the computer. It can be verified by the serial port assistant.)

vhdl 实现fpga 闪灯控制 流水线闪灯 还用signalTAP进行检测，给初学者参考(vhdl fpga flash control lines to achieve flash is also used signalTAP testing, to advanced users)

采用verilog编写的经典的cordic算法，旋转模式，亲测可用，经过了9次旋转。cordic算法采用不断旋转求出正弦余弦值，是一种有效地迭代算法