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//
// Copyright 2011-2012 Ettus Research LLC
// Copyright 2018 Ettus Research, a National Instruments Company
//
// SPDX-License-Identifier: LGPL-3.0-or-later
//
//
// Use this module in conjunction with settings_bus.v to add stateful reads
// to the settings bis. This enables you to do things like have registers reset atomicly
// as they are read. It also pipelines the address path to ease timing.
//
module settings_readback
#(parameter AWIDTH=16, parameter DWIDTH=32, parameter RB_ADDRW=2)
(
input wb_clk,
input wb_rst,
input [AWIDTH-1:0] wb_adr_i,
input wb_stb_i,
input wb_we_i,
input [DWIDTH-1:0] rb_data,
output reg [RB_ADDRW-1:0] rb_addr,
output [DWIDTH-1:0] wb_dat_o,
output reg rb_rd_stb
);
always @(posedge wb_clk)
if (wb_stb_i && ~wb_we_i) begin
rb_addr <= wb_adr_i[RB_ADDRW+1:2];
rb_rd_stb <= 1'b1;
end else begin
rb_rd_stb <= 1'b0;
end
assign wb_dat_o = rb_data;
endmodule // settings_readback
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