mirror of
https://github.com/fairwaves/UHD-Fairwaves.git
synced 2025-11-03 21:43:15 +00:00
64 lines
1.8 KiB
Verilog
64 lines
1.8 KiB
Verilog
//
|
|
// Copyright 2012 Ettus Research LLC
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program 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 General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
//
|
|
|
|
// User settings bus
|
|
//
|
|
// Provides 8-bit address, 32-bit data write only bus for user settings, consumes to addresses in
|
|
// normal settings bus.
|
|
//
|
|
// Write user address to BASE
|
|
// Write user data to BASE+1
|
|
//
|
|
// The user_set_stb will strobe after data write, must write new address even if same as previous one.
|
|
|
|
module user_settings
|
|
#(parameter BASE=0)
|
|
(input clk,
|
|
input rst,
|
|
|
|
input set_stb,
|
|
input [7:0] set_addr,
|
|
input [31:0] set_data,
|
|
|
|
output set_stb_user,
|
|
output [7:0] set_addr_user,
|
|
output [31:0] set_data_user
|
|
);
|
|
|
|
wire addr_changed, data_changed;
|
|
reg stb_int;
|
|
|
|
setting_reg #(.my_addr(BASE+0),.width(8)) sr_0
|
|
(.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
|
|
.in(set_data),.out(set_addr_user),.changed(addr_changed) );
|
|
|
|
setting_reg #(.my_addr(BASE+1)) sr_1
|
|
(.clk(clk),.rst(rst),.strobe(set_stb),.addr(set_addr),
|
|
.in(set_data),.out(set_data_user),.changed(data_changed) );
|
|
|
|
always @(posedge clk)
|
|
if (rst|set_stb_user)
|
|
stb_int <= 0;
|
|
else
|
|
if (addr_changed)
|
|
stb_int <= 1;
|
|
|
|
assign set_stb_user = stb_int & data_changed;
|
|
|
|
endmodule // user_settings
|
|
|