diff options
Diffstat (limited to 'fpga/usrp2/control_lib/settings_bus_crossclock.v')
| -rw-r--r-- | fpga/usrp2/control_lib/settings_bus_crossclock.v | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/fpga/usrp2/control_lib/settings_bus_crossclock.v b/fpga/usrp2/control_lib/settings_bus_crossclock.v index 9c5912042..a61ee8fad 100644 --- a/fpga/usrp2/control_lib/settings_bus_crossclock.v +++ b/fpga/usrp2/control_lib/settings_bus_crossclock.v @@ -1,5 +1,5 @@ // -// Copyright 2011 Ettus Research LLC +// Copyright 2011-2012 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 @@ -22,16 +22,17 @@ // the system or dsp clock on the output side module settings_bus_crossclock + #(parameter FLOW_CTRL=0) (input clk_i, input rst_i, input set_stb_i, input [7:0] set_addr_i, input [31:0] set_data_i, - input clk_o, input rst_o, output set_stb_o, output [7:0] set_addr_o, output [31:0] set_data_o); + input clk_o, input rst_o, output set_stb_o, output [7:0] set_addr_o, output [31:0] set_data_o, input blocked); wire full, empty; fifo_xlnx_16x40_2clk settings_fifo (.rst(rst_i), .wr_clk(clk_i), .din({set_addr_i,set_data_i}), .wr_en(set_stb_i & ~full), .full(full), - .rd_clk(clk_o), .dout({set_addr_o,set_data_o}), .rd_en(~empty), .empty(empty)); + .rd_clk(clk_o), .dout({set_addr_o,set_data_o}), .rd_en(set_stb_o), .empty(empty)); - assign set_stb_o = ~empty; + assign set_stb_o = ~empty & (~blocked | ~FLOW_CTRL); endmodule // settings_bus_crossclock |