Description: FIFO（先进先出队列）通常用于数据的缓存和用于容纳异步信号的频率或相位的差异。本FIFO的实现是利用
双口RAM 和读写地址产生模块来实现的.FIFO的接口信号包括异步的写时钟（wr_clk）和读时钟（rd_clk）、
与写时钟同步的写有效（wren）和写数据（wr_data） 、与读时钟同步的读有效（rden）和读数据（rd_data）
为了实现正确的读写和避免FIFO的上溢或下溢，给出与读时钟和写时钟分别同步的FIFO的空标志（empty）和
满标志（full）以禁止读写操作。-FIFO (FIFO queue) is usually used for data caching and asynchronous signal used to accommodate the frequency or phase differences. The realization of this FIFO is to use dual-port RAM and to read and write address generator module achieved. FIFO interface signals, including asynchronous write clock (wr_clk) and read clock (rd_clk), and write effectively write clock synchronization (wren) and write data (wr_data), clock synchronization and time effective reading (rden) and read data (rd_data) in order to realize the right to read and write and to avoid FIFO overflow or the underflow, is given with the time clock and write clock synchronization FIFO respectively empty signs (empty) and full logo (full) to prohibit the read and write operations. Platform: |
Size: 378880 |
Author:lsg |
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Description: 异步FIFO是用来适配不同时钟域之间的相位差和频率飘移的重要模块。本文设计的异步FIFO采用了格雷（GRAY）变换技术和双端口RAM实现了不同时钟域之间的数据无损传输。该结构利用了GRAY变换的特点，使得整个系统可靠性高和抗干扰能力强，系统可以工作在读写时钟频率漂移达到正负300PPM的恶劣环境。并且由于采用了模块化结构，使得系统具有良好的可扩充性。-Asynchronous FIFO is an important module which always used to absorb the phase and frequency offset between different clock domain in communication area .In this paper, an FIFO module is designed using Gray convert technology and dual-port ram , which realizing scatheless transmit between different clock domain. The advances of Gray (Only one bit changes between neighboring two clock ) improves the reliability and anti-jamming capability of the system. And the system can work normally in the bad condition which the phase and frequency offset target to 300PPM. It is proved by work that the FIFO module can fulfill the demands of real-time of data transmitting system, and the module is powerful enough for more data process in the future. Platform: |
Size: 81920 |
Author:雷志 |
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Description: 设计了一个具有双时钟信号，双复位信号的FIFO，用于FPGA中的数据缓冲，RAM的定义是参数型，可以根据自己的需求，修改此参数，完成RAM的容量扩展。程序中有详细的说明-Designed a dual-clock signal, double reset signal FIFO, for the FPGA in the data buffer, RAM is defined as parameter type, according to their needs, and modify this parameter, the completion of the capacity expansion of RAM. Procedures described in detail Platform: |
Size: 183296 |
Author:luosheng |
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Description: 异步双时钟fifo，vhdl源代码。基本组成是定制的fifo加上空满判断逻辑，基本功能都有-Asynchronous dual clock fifo, vhdl source code. Fifo basic component is a custom air filled with the logic to judge the basic functions are Platform: |
Size: 372736 |
Author:tangjieling |
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