// *************************************************************************** // *************************************************************************** // Copyright 2014 - 2017 (c) Analog Devices, Inc. All rights reserved. // // This core 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. // // Redistribution and use of source or resulting binaries, with or without modification // of this file, are permitted under one of the following two license terms: // // 1. The GNU General Public License version 2 as published by the // Free Software Foundation, which can be found in the top level directory of // the repository (LICENSE_GPL2), and at: // // OR // // 2. An ADI specific BSD license as noted in the top level directory, or on-line at: // https://github.com/analogdevicesinc/hdl/blob/master/LICENSE_ADIBSD // This will allow to generate bit files and not release the source code, // as long as it attaches to an ADI device. // // *************************************************************************** // *************************************************************************** `timescale 1ns/100ps module up_delay_cntrl #( // parameters parameter DISABLE = 0, parameter INIT_DELAY = 0, parameter DATA_WIDTH = 8, parameter BASE_ADDRESS = 6'h02) ( // delay interface input delay_clk, output delay_rst, input delay_locked, // io interface output [(DATA_WIDTH-1):0] up_dld, output [((DATA_WIDTH*5)-1):0] up_dwdata, input [((DATA_WIDTH*5)-1):0] up_drdata, // processor interface input up_rstn, input up_clk, input up_wreq, input [13:0] up_waddr, input [31:0] up_wdata, output up_wack, input up_rreq, input [13:0] up_raddr, output [31:0] up_rdata, output up_rack); // internal registers reg up_preset = 'd0; reg up_wack_int = 'd0; reg up_rack_int = 'd0; reg [31:0] up_rdata_int = 'd0; reg up_dlocked_m1 = 'd0; reg up_dlocked_m2 = 'd0; reg up_dlocked_m3 = 'd0; reg up_dlocked = 'd0; reg [(DATA_WIDTH-1):0] up_dld_int = 'd0; reg [((DATA_WIDTH*5)-1):0] up_dwdata_int = 'd0; // internal signals wire up_wreq_s; wire up_rreq_s; wire [ 4:0] up_rdata_s; wire [(DATA_WIDTH-1):0] up_drdata4_s; wire [(DATA_WIDTH-1):0] up_drdata3_s; wire [(DATA_WIDTH-1):0] up_drdata2_s; wire [(DATA_WIDTH-1):0] up_drdata1_s; wire [(DATA_WIDTH-1):0] up_drdata0_s; wire [(DATA_WIDTH-1):0] up_dld_s; wire [((DATA_WIDTH*5)-1):0] up_dwdata_s; wire [(DATA_WIDTH-1):0] up_dinit_s; wire [((DATA_WIDTH*5)-1):0] up_dinitdata_s; wire delay_rst_s; // variables genvar n; // decode block select assign up_wreq_s = (up_waddr[13:8] == BASE_ADDRESS) ? up_wreq : 1'b0; assign up_rreq_s = (up_raddr[13:8] == BASE_ADDRESS) ? up_rreq : 1'b0; assign up_rdata_s[4] = | up_drdata4_s; assign up_rdata_s[3] = | up_drdata3_s; assign up_rdata_s[2] = | up_drdata2_s; assign up_rdata_s[1] = | up_drdata1_s; assign up_rdata_s[0] = | up_drdata0_s; generate for (n = 0; n < DATA_WIDTH; n = n + 1) begin: g_drd assign up_drdata4_s[n] = (up_raddr[7:0] == n) ? up_drdata[((n*5)+4)] : 1'd0; assign up_drdata3_s[n] = (up_raddr[7:0] == n) ? up_drdata[((n*5)+3)] : 1'd0; assign up_drdata2_s[n] = (up_raddr[7:0] == n) ? up_drdata[((n*5)+2)] : 1'd0; assign up_drdata1_s[n] = (up_raddr[7:0] == n) ? up_drdata[((n*5)+1)] : 1'd0; assign up_drdata0_s[n] = (up_raddr[7:0] == n) ? up_drdata[((n*5)+0)] : 1'd0; end endgenerate // processor interface assign up_wack = (DISABLE == 1) ? 1'd0 : up_wack_int; assign up_rack = (DISABLE == 1) ? 1'd0 : up_rack_int; assign up_rdata = (DISABLE == 1) ? 32'd0 : up_rdata_int; always @(negedge up_rstn or posedge up_clk) begin if (up_rstn == 0) begin up_preset <= 1'd1; up_wack_int <= 'd0; up_rack_int <= 'd0; up_rdata_int <= 'd0; up_dlocked_m1 <= 'd0; up_dlocked_m2 <= 'd0; up_dlocked_m3 <= 'd0; up_dlocked <= 'd0; end else begin up_preset <= 1'd0; up_wack_int <= up_wreq_s; up_rack_int <= up_rreq_s; if (up_rreq_s == 1'b1) begin if (up_dlocked == 1'b0) begin up_rdata_int <= 32'hffffffff; end else begin up_rdata_int <= {27'd0, up_rdata_s}; end end else begin up_rdata_int <= 32'd0; end up_dlocked_m1 <= delay_locked; up_dlocked_m2 <= up_dlocked_m1; up_dlocked_m3 <= up_dlocked_m2; up_dlocked <= up_dlocked_m3; end end // init delay values (after delay locked) generate for (n = 0; n < DATA_WIDTH; n = n + 1) begin: g_dinit assign up_dinit_s[n] = up_dlocked_m2 & ~up_dlocked_m3; assign up_dinitdata_s[((n*5)+4):(n*5)] = INIT_DELAY; end endgenerate // write does not hold- read back what goes into effect. generate for (n = 0; n < DATA_WIDTH; n = n + 1) begin: g_dwr assign up_dld_s[n] = (up_waddr[7:0] == n) ? up_wreq_s : 1'b0; assign up_dwdata_s[((n*5)+4):(n*5)] = (up_waddr[7:0] == n) ? up_wdata[4:0] : up_dwdata_int[((n*5)+4):(n*5)]; end endgenerate assign up_dld = (DISABLE == 1) ? 'd0 : up_dld_int; assign up_dwdata = (DISABLE == 1) ? 'd0 : up_dwdata_int; always @(negedge up_rstn or posedge up_clk) begin if (up_rstn == 0) begin up_dld_int <= 'd0; up_dwdata_int <= 'd0; end else begin up_dld_int <= up_dld_s | up_dinit_s; if ((up_dlocked_m2 == 1'b1) && (up_dlocked_m3 == 1'b0)) begin up_dwdata_int <= up_dinitdata_s; end else if (up_wreq_s == 1'b1) begin up_dwdata_int <= up_dwdata_s; end end end // resets assign delay_rst = (DISABLE == 1) ? 1'd0 : delay_rst_s; ad_rst i_delay_rst_reg ( .preset (up_preset), .clk (delay_clk), .rst (delay_rst_s)); endmodule // *************************************************************************** // ***************************************************************************