FIFO设计的关键就是产生可靠的FIFO读写指针和生成FIFO“空”/“满”状态标志。 FIFO空:当读写指针相等时,表明FIFO为空,这种情况发生在复位操作时,或者当读指针读出FIFO中最后一个字后,追赶上了写指针时; FIFO满:当读写指针再次相等时,表明FIFO为满,这种情况发生在,当写指针转了一圈,折回来(wrapped around)又追上了读指针
Here is an example to explain howFIFO uses the memory. This is a fifo of length 8, WP and RP are the locationswhere write pointer and read pointer points. Shaded area in the diagram isfilled with data. When ever FIFO counter becomes zeroor BUF_LENGTH, empty or full flags will be set...
一个可以综合的Verilog 写的FIFO存储器 Synthesizable FIFO Model This example describes a synthesizable implementation of a FIFO. The FIFO depth and FIFO width in bits can be modified by simply changing the value of two parameters, `FWIDTH and `FDEPTH. For this example, the FIFO depth is 4 and...
Generally fifos are implementedusing rotating pointers. We can call write and read pointers of a FIFO as headand tail of data area. Initially read and write pointers of the FIFO will pointto the same location Here is an example to explain howFIFO uses the memory. This is a fifo of lengt...
一个可以综合的Verilog写的FIFO存储器 SynthesizableFIFOModel ThisexampledescribesasynthesizableimplementationofaFIFO.TheFIFOdepthandFIFOwidthinbitscanbemodifiedbysimplychangingthevalueoftwoparameters,`FWIDTHand`FDEPTH.Forthisexample,theFIFOdepthis4andtheFIFOwidthis32bits.Theinput/outputportsoftheFIFOareshowninFigure...
2.从硬件的角度出发,对信箱的最简单的理解是把他看成一个具有源端和收端的FIFO。 源端线程,试图向一个容量固定且饱和的信箱里放数据时,会发生阻塞直到信箱里的数据被移走。 收端线程,试图向一个空信箱取数据时,会发生阻塞直到数据放入信箱里。 源端把数据放入信箱,收端则从信箱中获取数据。信箱可以有容量限制...
module mactx_32x128_fifo #( parameter WIDTH=128, parameter DEEPTH=32 ) ( input wclk, ... input rclk, ... ) ... ... ram_1r1w #( .width(WIDTH), .deepth(DEEPTH) ) ram_1r1w_u0 ( .wclk(wclk), .wen(write_en), .waddr(waddr), .wd...
纯verilog构建异步fifo,附带仿真脚本。读写端口各有一组时钟、读写使能、读写端口、满空指示、fifo使用量。源码结构清晰,注释完备,易于理解。
UART with FIFO modular timer unit interrupt controller 32-bit GPIO port Opencores 始建于1999年,开源IP的大本营,包含CPU,通信接口,外设接口等各种数字IP core。 以verilog为主,也包含部分vhdl代码,很多IP基于Wishbone总线接口。 代码管理基于CVS,2009年迁移到svn,也有人把代码上传到了github ...
RAM可以通过以下方式初始化: 1,在HDL源代码中指定RAM初始内容; 2,在外部数据文件中指定RAM初始内容。 Verilog Coding Example: