diff options
| -rw-r--r-- | usrp2/gpmc/cross_clock_reader.v | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/usrp2/gpmc/cross_clock_reader.v b/usrp2/gpmc/cross_clock_reader.v index a30e0385f..a8366badc 100644 --- a/usrp2/gpmc/cross_clock_reader.v +++ b/usrp2/gpmc/cross_clock_reader.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 @@ -26,17 +26,19 @@ module cross_clock_reader output reg [WIDTH-1:0] out ); - reg [WIDTH-1:0] shadow; + reg [WIDTH-1:0] shadow0, shadow1; always @(posedge clk) begin if (rst) begin out <= DEFAULT; - shadow <= DEFAULT; + shadow0 <= DEFAULT; + shadow1 <= DEFAULT; end - else if (shadow == in) begin - out <= shadow; + else if (shadow0 == shadow1) begin + out <= shadow1; end - shadow <= in; + shadow0 <= in; + shadow1 <= shadow0; end endmodule //cross_clock_reader |