<##//////////////////////////////////////////////////////////////////
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<##//////////////////////////////////////////////////////////////////
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//// ////
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//// ////
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//// Author: Eyal Hochberg ////
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//// Author: Eyal Hochberg ////
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//// eyal@provartec.com ////
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//// eyal@provartec.com ////
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//// ////
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//// ////
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//// Downloaded from: http://www.opencores.org ////
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//// Downloaded from: http://www.opencores.org ////
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/////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////
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//// ////
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//// ////
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//// Copyright (C) 2010 Provartec LTD ////
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//// Copyright (C) 2010 Provartec LTD ////
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//// www.provartec.com ////
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//// www.provartec.com ////
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//// info@provartec.com ////
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//// info@provartec.com ////
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//// ////
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//// ////
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//// This source file may be used and distributed without ////
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//// This source file may be used and distributed without ////
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//// restriction provided that this copyright statement is not ////
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//// restriction provided that this copyright statement is not ////
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//// removed from the file and that any derivative work contains ////
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//// removed from the file and that any derivative work contains ////
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//// the original copyright notice and the associated disclaimer.////
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//// the original copyright notice and the associated disclaimer.////
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//// ////
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//// ////
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//// This source file is free software; you can redistribute it ////
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//// This source file is free software; you can redistribute it ////
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//// and/or modify it under the terms of the GNU Lesser General ////
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//// and/or modify it under the terms of the GNU Lesser General ////
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//// Public License as published by the Free Software Foundation.////
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//// Public License as published by the Free Software Foundation.////
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//// ////
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//// ////
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//// This source is distributed in the hope that it will be ////
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//// This source is distributed in the hope that it will be ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
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//// PURPOSE. See the GNU Lesser General Public License for more////
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//// PURPOSE. See the GNU Lesser General Public License for more////
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//// details. http://www.gnu.org/licenses/lgpl.html ////
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//// details. http://www.gnu.org/licenses/lgpl.html ////
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//// ////
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//// ////
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//////////////////////////////////////////////////////////////////##>
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//////////////////////////////////////////////////////////////////##>
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INCLUDE def_axi2apb.txt
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INCLUDE def_axi2apb.txt
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OUTFILE PREFIX_cmd.v
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OUTFILE PREFIX_cmd.v
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module PREFIX_cmd (PORTS);
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module PREFIX_cmd (PORTS);
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input clk;
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input clk;
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input reset;
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input reset;
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port AWGROUP_APB_AXI_A;
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port AWGROUP_APB_AXI_A;
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port ARGROUP_APB_AXI_A;
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port ARGROUP_APB_AXI_A;
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input finish_wr;
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input finish_wr;
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input finish_rd;
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input finish_rd;
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output cmd_empty;
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output cmd_empty;
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output cmd_read;
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output cmd_read;
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output [ID_BITS-1:0] cmd_id;
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output [ID_BITS-1:0] cmd_id;
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output [ADDR_BITS-1:0] cmd_addr;
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output [ADDR_BITS-1:0] cmd_addr;
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output cmd_err;
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output cmd_err;
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wire AGROUP_APB_AXI_A;
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wire AGROUP_APB_AXI_A;
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wire cmd_push;
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wire cmd_push;
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wire cmd_pop;
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wire cmd_pop;
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wire cmd_empty;
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wire cmd_empty;
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wire cmd_full;
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wire cmd_full;
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reg read;
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reg read;
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wire wreq, rreq;
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wire wreq, rreq;
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wire wack, rack;
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wire wack, rack;
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wire AERR;
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wire AERR;
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assign wreq = AWVALID;
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assign wreq = AWVALID;
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assign rreq = ARVALID;
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assign rreq = ARVALID;
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assign wack = AWVALID & AWREADY;
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assign wack = AWVALID & AWREADY;
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assign rack = ARVALID & ARREADY;
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assign rack = ARVALID & ARREADY;
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always @(posedge clk or posedge reset)
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always @(posedge clk or posedge reset)
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if (reset)
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if (reset)
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read <= #FFD 1'b1;
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read <= #FFD 1'b1;
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else if (wreq & (rack | (~rreq)))
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else if (wreq & (rack | (~rreq)))
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read <= #FFD 1'b0;
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read <= #FFD 1'b0;
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else if (rreq & (wack | (~wreq)))
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else if (rreq & (wack | (~wreq)))
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read <= #FFD 1'b1;
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read <= #FFD 1'b1;
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//command mux
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//command mux
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assign AGROUP_APB_AXI_A = read ? ARGROUP_APB_AXI_A : AWGROUP_APB_AXI_A;
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assign AGROUP_APB_AXI_A = read ? ARGROUP_APB_AXI_A : AWGROUP_APB_AXI_A;
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assign AERR = (ASIZE != 'd2) | (ALEN != 'd0); //support only 32 bit single AXI commands
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assign AERR = (ASIZE != 'd2) | (ALEN != 'd0); //support only 32 bit single AXI commands
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assign ARREADY = (~cmd_full) & read;
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assign ARREADY = (~cmd_full) & read;
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assign AWREADY = (~cmd_full) & (~read);
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assign AWREADY = (~cmd_full) & (~read);
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assign cmd_push = AVALID & AREADY;
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assign cmd_push = AVALID & AREADY;
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assign cmd_pop = cmd_read ? finish_rd : finish_wr;
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assign cmd_pop = cmd_read ? finish_rd : finish_wr;
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CREATE prgen_fifo.v DEFCMD(SWAP CONST(#FFD) #FFD)
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CREATE prgen_fifo.v DEFCMD(SWAP CONST(#FFD) #FFD)
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prgen_fifo #(ID_BITS+ADDR_BITS+2, CMD_DEPTH)
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prgen_fifo #(ID_BITS+ADDR_BITS+2, CMD_DEPTH)
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cmd_fifo(
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cmd_fifo(
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.clk(clk),
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.clk(clk),
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.reset(reset),
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.reset(reset),
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.push(cmd_push),
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.push(cmd_push),
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.pop(cmd_pop),
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.pop(cmd_pop),
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.din({
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.din({
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AID,
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AID,
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AADDR,
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AADDR,
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AERR,
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AERR,
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read
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read
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}
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}
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),
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),
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.dout({
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.dout({
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cmd_id,
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cmd_id,
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cmd_addr,
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cmd_addr,
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cmd_err,
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cmd_err,
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cmd_read
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cmd_read
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}
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}
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),
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),
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.empty(cmd_empty),
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.empty(cmd_empty),
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.full(cmd_full)
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.full(cmd_full)
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);
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);
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endmodule
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endmodule
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