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[/] [versatile_library/] [trunk/] [rtl/] [verilog/] [registers.v] - Rev 101
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////////////////////////////////////////////////////////////////////// //// //// //// Versatile library, registers //// //// //// //// Description //// //// Different type of registers //// //// //// //// //// //// To Do: //// //// - add more different registers //// //// //// //// Author(s): //// //// - Michael Unneback, unneback@opencores.org //// //// ORSoC AB //// //// //// ////////////////////////////////////////////////////////////////////// //// //// //// Copyright (C) 2010 Authors and OPENCORES.ORG //// //// //// //// 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 source file is free software; you can redistribute it //// //// and/or modify it under the terms of the GNU Lesser General //// //// Public License as published by the Free Software Foundation; //// //// either version 2.1 of the License, or (at your option) any //// //// later version. //// //// //// //// This source is distributed in the hope that it will be //// //// useful, but WITHOUT ANY WARRANTY; without even the implied //// //// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //// //// PURPOSE. See the GNU Lesser General Public License for more //// //// details. //// //// //// //// You should have received a copy of the GNU Lesser General //// //// Public License along with this source; if not, download it //// //// from http://www.opencores.org/lgpl.shtml //// //// //// ////////////////////////////////////////////////////////////////////// `ifdef DFF `define MODULE dff module `BASE`MODULE ( d, q, clk, rst); `undef MODULE parameter width = 1; parameter reset_value = 0; input [width-1:0] d; input clk, rst; output reg [width-1:0] q; always @ (posedge clk or posedge rst) if (rst) q <= reset_value; else q <= d; endmodule `endif `ifdef DFF_ARRAY `define MODULE dff_array module `BASE`MODULE ( d, q, clk, rst); `undef MODULE parameter width = 1; parameter depth = 2; parameter reset_value = 1'b0; input [width-1:0] d; input clk, rst; output [width-1:0] q; reg [0:depth-1] q_tmp [width-1:0]; integer i; always @ (posedge clk or posedge rst) if (rst) begin for (i=0;i<depth;i=i+1) q_tmp[i] <= {width{reset_value}}; end else begin q_tmp[0] <= d; for (i=1;i<depth;i=i+1) q_tmp[i] <= q_tmp[i-1]; end assign q = q_tmp[depth-1]; endmodule `endif `ifdef DFF_CE `define MODULE dff_ce module `BASE`MODULE ( d, ce, q, clk, rst); `undef MODULE parameter width = 1; parameter reset_value = 0; input [width-1:0] d; input ce, clk, rst; output reg [width-1:0] q; always @ (posedge clk or posedge rst) if (rst) q <= reset_value; else if (ce) q <= d; endmodule `endif `ifdef DFF_CE_CLEAR `define MODULE dff_ce_clear module `BASE`MODULE ( d, ce, clear, q, clk, rst); `undef MODULE parameter width = 1; parameter reset_value = 0; input [width-1:0] d; input ce, clear, clk, rst; output reg [width-1:0] q; always @ (posedge clk or posedge rst) if (rst) q <= reset_value; else if (ce) if (clear) q <= {width{1'b0}}; else q <= d; endmodule `endif `ifdef DF_CE_SET `define MODULE dff_ce_set module `BASE`MODULE ( d, ce, set, q, clk, rst); `undef MODULE parameter width = 1; parameter reset_value = 0; input [width-1:0] d; input ce, set, clk, rst; output reg [width-1:0] q; always @ (posedge clk or posedge rst) if (rst) q <= reset_value; else if (ce) if (set) q <= {width{1'b1}}; else q <= d; endmodule `endif `ifdef SPR `define MODULE spr module `BASE`MODULE ( sp, r, q, clk, rst); `undef MODULE //parameter width = 1; parameter reset_value = 1'b0; input sp, r; output reg q; input clk, rst; always @ (posedge clk or posedge rst) if (rst) q <= reset_value; else if (sp) q <= 1'b1; else if (r) q <= 1'b0; endmodule `endif `ifdef SRP `define MODULE srp module `BASE`MODULE ( s, rp, q, clk, rst); `undef MODULE parameter width = 1; parameter reset_value = 0; input s, rp; output reg q; input clk, rst; always @ (posedge clk or posedge rst) if (rst) q <= reset_value; else if (rp) q <= 1'b0; else if (s) q <= 1'b1; endmodule `endif `ifdef ALTERA `ifdef DFF_SR // megafunction wizard: %LPM_FF% // GENERATION: STANDARD // VERSION: WM1.0 // MODULE: lpm_ff // ============================================================ // File Name: dff_sr.v // Megafunction Name(s): // lpm_ff // // Simulation Library Files(s): // lpm // ============================================================ // ************************************************************ // THIS IS A WIZARD-GENERATED FILE. DO NOT EDIT THIS FILE! // // 9.1 Build 304 01/25/2010 SP 1 SJ Full Version // ************************************************************ //Copyright (C) 1991-2010 Altera Corporation //Your use of Altera Corporation's design tools, logic functions //and other software and tools, and its AMPP partner logic //functions, and any output files from any of the foregoing //(including device programming or simulation files), and any //associated documentation or information are expressly subject //to the terms and conditions of the Altera Program License //Subscription Agreement, Altera MegaCore Function License //Agreement, or other applicable license agreement, including, //without limitation, that your use is for the sole purpose of //programming logic devices manufactured by Altera and sold by //Altera or its authorized distributors. Please refer to the //applicable agreement for further details. // synopsys translate_off `timescale 1 ps / 1 ps // synopsys translate_on `define MODULE dff_sr module `BASE`MODULE ( `undef MODULE aclr, aset, clock, data, q); input aclr; input aset; input clock; input data; output q; wire [0:0] sub_wire0; wire [0:0] sub_wire1 = sub_wire0[0:0]; wire q = sub_wire1; wire sub_wire2 = data; wire sub_wire3 = sub_wire2; lpm_ff lpm_ff_component ( .aclr (aclr), .clock (clock), .data (sub_wire3), .aset (aset), .q (sub_wire0) // synopsys translate_off , .aload (), .enable (), .sclr (), .sload (), .sset () // synopsys translate_on ); defparam lpm_ff_component.lpm_fftype = "DFF", lpm_ff_component.lpm_type = "LPM_FF", lpm_ff_component.lpm_width = 1; endmodule // ============================================================ // CNX file retrieval info // ============================================================ // Retrieval info: PRIVATE: ACLR NUMERIC "1" // Retrieval info: PRIVATE: ALOAD NUMERIC "0" // Retrieval info: PRIVATE: ASET NUMERIC "1" // Retrieval info: PRIVATE: ASET_ALL1 NUMERIC "1" // Retrieval info: PRIVATE: CLK_EN NUMERIC "0" // Retrieval info: PRIVATE: DFF NUMERIC "1" // Retrieval info: PRIVATE: INTENDED_DEVICE_FAMILY STRING "Cyclone IV E" // Retrieval info: PRIVATE: SCLR NUMERIC "0" // Retrieval info: PRIVATE: SLOAD NUMERIC "0" // Retrieval info: PRIVATE: SSET NUMERIC "0" // Retrieval info: PRIVATE: SSET_ALL1 NUMERIC "1" // Retrieval info: PRIVATE: SYNTH_WRAPPER_GEN_POSTFIX STRING "0" // Retrieval info: PRIVATE: UseTFFdataPort NUMERIC "0" // Retrieval info: PRIVATE: nBit NUMERIC "1" // Retrieval info: CONSTANT: LPM_FFTYPE STRING "DFF" // Retrieval info: CONSTANT: LPM_TYPE STRING "LPM_FF" // Retrieval info: CONSTANT: LPM_WIDTH NUMERIC "1" // Retrieval info: USED_PORT: aclr 0 0 0 0 INPUT NODEFVAL aclr // Retrieval info: USED_PORT: aset 0 0 0 0 INPUT NODEFVAL aset // Retrieval info: USED_PORT: clock 0 0 0 0 INPUT NODEFVAL clock // Retrieval info: USED_PORT: data 0 0 0 0 INPUT NODEFVAL data // Retrieval info: USED_PORT: q 0 0 0 0 OUTPUT NODEFVAL q // Retrieval info: CONNECT: @clock 0 0 0 0 clock 0 0 0 0 // Retrieval info: CONNECT: q 0 0 0 0 @q 0 0 1 0 // Retrieval info: CONNECT: @aclr 0 0 0 0 aclr 0 0 0 0 // Retrieval info: CONNECT: @aset 0 0 0 0 aset 0 0 0 0 // Retrieval info: CONNECT: @data 0 0 1 0 data 0 0 0 0 // Retrieval info: LIBRARY: lpm lpm.lpm_components.all // Retrieval info: GEN_FILE: TYPE_NORMAL dff_sr.v TRUE // Retrieval info: GEN_FILE: TYPE_NORMAL dff_sr.inc FALSE // Retrieval info: GEN_FILE: TYPE_NORMAL dff_sr.cmp FALSE // Retrieval info: GEN_FILE: TYPE_NORMAL dff_sr.bsf FALSE // Retrieval info: GEN_FILE: TYPE_NORMAL dff_sr_inst.v FALSE // Retrieval info: GEN_FILE: TYPE_NORMAL dff_sr_bb.v FALSE // Retrieval info: LIB_FILE: lpm `endif `else `ifdef DFF_SR `define MODULE dff_sr module `BASE`MODULE ( aclr, aset, clock, data, q); `undef MODULE input aclr; input aset; input clock; input data; output reg q; always @ (posedge clock or posedge aclr or posedge aset) if (aclr) q <= 1'b0; else if (aset) q <= 1'b1; else q <= data; endmodule `endif `endif // LATCH // For targtes not supporting LATCH use dff_sr with clk=1 and data=1 `ifdef ALTERA `ifdef LATCH `define MODULE latch module `BASE`MODULE ( d, le, q, clk); `undef MODULE input d, le; output q; input clk; dff_sr i0 (.aclr(), .aset(), .clock(1'b1), .data(1'b1), .q(q)); endmodule `endif `else `ifdef LATCH `define MODULE latch module `BASE`MODULE ( d, le, q, clk); `undef MODULE input d, le; input clk; always @ (le or d) if (le) d <= q; endmodule `endif `endif `ifdef SHREG `define MODULE shreg module `BASE`MODULE ( d, q, clk, rst); `undef MODULE parameter depth = 10; input d; output q; input clk, rst; reg [1:depth] dffs; always @ (posedge clk or posedge rst) if (rst) dffs <= {depth{1'b0}}; else dffs <= {d,dffs[1:depth-1]}; assign q = dffs[depth]; endmodule `endif `ifdef SHREG_CE `define MODULE shreg_ce module `BASE`MODULE ( d, ce, q, clk, rst); `undef MODULE parameter depth = 10; input d, ce; output q; input clk, rst; reg [1:depth] dffs; always @ (posedge clk or posedge rst) if (rst) dffs <= {depth{1'b0}}; else if (ce) dffs <= {d,dffs[1:depth-1]}; assign q = dffs[depth]; endmodule `endif `ifdef DELAY `define MODULE delay module `BASE`MODULE ( d, q, clk, rst); `undef MODULE parameter depth = 10; input d; output q; input clk, rst; reg [1:depth] dffs; always @ (posedge clk or posedge rst) if (rst) dffs <= {depth{1'b0}}; else dffs <= {d,dffs[1:depth-1]}; assign q = dffs[depth]; endmodule `endif `ifdef DELAY_EMPTYFLAG `define MODULE delay_emptyflag module `BASE`MODULE ( d, q, emptyflag, clk, rst); `undef MODULE parameter depth = 10; input d; output q, emptyflag; input clk, rst; reg [1:depth] dffs; always @ (posedge clk or posedge rst) if (rst) dffs <= {depth{1'b0}}; else dffs <= {d,dffs[1:depth-1]}; assign q = dffs[depth]; assign emptyflag = !(|dffs); endmodule `endif `ifdef PULSE2TOGGLE `define MODULE pulse2toggle module `BASE`MODULE ( pl, q, clk, rst); `undef MODULE input pl; output reg q; input clk, rst; always @ (posedge clk or posedge rst) if (rst) q <= 1'b0; else q <= pl ^ q; endmodule `endif `ifdef TOGGLE2PULSE `define MODULE toggle2pulse module `BASE`MODULE (d, pl, clk, rst); `undef MODULE input d; output pl; input clk, rst; reg dff; always @ (posedge clk or posedge rst) if (rst) dff <= 1'b0; else dff <= d; assign pl = d ^ dff; endmodule `endif `ifdef SYNCHRONIZER `define MODULE synchronizer module `BASE`MODULE (d, q, clk, rst); `undef MODULE input d; output reg q; output clk, rst; reg dff; always @ (posedge clk or posedge rst) if (rst) {q,dff} <= 2'b00; else {q,dff} <= {dff,d}; endmodule `endif `ifdef CDC `define MODULE cdc module `BASE`MODULE ( start_pl, take_it_pl, take_it_grant_pl, got_it_pl, clk_src, rst_src, clk_dst, rst_dst); `undef MODULE input start_pl; output take_it_pl; input take_it_grant_pl; // note: connect to take_it_pl to generate automatic ack output got_it_pl; input clk_src, rst_src; input clk_dst, rst_dst; wire take_it_tg, take_it_tg_sync; wire got_it_tg, got_it_tg_sync; // src -> dst `define MODULE pulse2toggle `BASE`MODULE p2t0 ( `undef MODULE .pl(start_pl), .q(take_it_tg), .clk(clk_src), .rst(rst_src)); `define MODULE synchronizer `BASE`MODULE sync0 ( `undef MODULE .d(take_it_tg), .q(take_it_tg_sync), .clk(clk_dst), .rst(rst_dst)); `define MODULE toggle2pulse `BASE`MODULE t2p0 ( `undef MODULE .d(take_it_tg_sync), .pl(take_it_pl), .clk(clk_dst), .rst(rst_dst)); // dst -> src `define MODULE pulse2toggle `BASE`MODULE p2t1 ( `undef MODULE .pl(take_it_grant_pl), .q(got_it_tg), .clk(clk_dst), .rst(rst_dst)); `define MODULE synchronizer `BASE`MODULE sync1 ( `undef MODULE .d(got_it_tg), .q(got_it_tg_sync), .clk(clk_src), .rst(rst_src)); `define MODULE toggle2pulse `BASE`MODULE t2p1 ( `undef MODULE .d(got_it_tg_sync), .pl(got_it_pl), .clk(clk_src), .rst(rst_src)); endmodule `endif
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