Subversion Repositories pipelined_fft_128

/////////////////////////////////////////////////////////////////////
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////  FFT/IFFT 128 points transform                              ////
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////  Authors: Anatoliy Sergienko, Volodya Lepeha                ////
////  Company: Unicore Systems http://unicore.co.ua              ////
////                                                             ////
////  Downloaded from: http://www.opencores.org                  ////
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//// Copyright (C) 2006-2010 Unicore Systems LTD                 ////
//// www.unicore.co.ua                                           ////
//// o.uzenkov@unicore.co.ua                                     ////
////                                                             ////
//// This source file may be used and distributed without        ////
//// restriction provided that this copyright statement is not   ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer.////
////                                                             ////
//// THIS SOFTWARE IS PROVIDED "AS IS"                           ////
//// AND ANY EXPRESSED OR IMPLIED WARRANTIES,                    ////
//// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED                  ////
//// WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT              ////
//// AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.        ////
//// IN NO EVENT SHALL THE UNICORE SYSTEMS OR ITS                ////
//// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,            ////
//// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL            ////
//// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT         ////
//// OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,               ////
//// DATA, OR PROFITS; OR BUSINESS INTERRUPTION)                 ////
//// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,              ////
//// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT              ////
//// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING                 ////
//// IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,                 ////
//// EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.          ////
////                                                             ////
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//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~		
// DESCRIPTION	:	1-port synchronous RAM
// FUNCTION:	 	1-port synchronous RAM
//	FILES:		    	RAM256.v -single ported synchronous RAM
//  PROPERTIES: 1) Has the volume of 256 data
//						  	2) RAM is synchronous one, the read datum is outputted in 2 cycles after the address setting
//							3) Can be substituted to any 2-port synchronous RAM 
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
`timescale 1 ns / 1 ps
`include "FFT128_CONFIG.inc"	 
 
module RAM128 ( CLK, ED,WE ,ADDR ,DI ,DO );
	`FFT128paramnb	
 
	output [nb-1:0] DO ;
	reg [nb-1:0] DO ;
	input CLK ;
	wire CLK ;	 
	input ED;
	input WE ;
	wire WE ;
	input [6:0] ADDR ;
	wire [6:0] ADDR ;
	input [nb-1:0] DI ;
	wire [nb-1:0] DI ;
	reg [nb-1:0] mem [127:0];
	reg [6:0] addrrd;		  
 
	always @(posedge CLK) begin
			if (ED) begin
					if (WE)		mem[ADDR] <= DI;
					addrrd <= ADDR;	         //storing the address
					DO <= mem[addrrd];	   // registering the read datum
				end	  
		end
 
 
endmodule