1 files changed, 25 insertions, 0 deletions
diff --git a/fpga/usrp3/lib/control/gray2bin.v b/fpga/usrp3/lib/control/gray2bin.v
new file mode 100644
index 000000000..c75ad80c6
--- /dev/null
+++ b/fpga/usrp3/lib/control/gray2bin.v
@@ -0,0 +1,25 @@
+//
+// Copyright 2016 Ettus Research, a National Instruments Company
+//
+// SPDX-License-Identifier: LGPL-3.0-or-later
+//
+//
+// Gray: {a,b,c,d}
+// Bits: {a,a^b,a^b^c,a^b^c^d}
+//
+module gray2bin #(
+    parameter WIDTH = 8)
+(
+    input [WIDTH-1:0] gray,
+    output reg [WIDTH-1:0] bin
+);
+
+    integer i;
+    always @(*) begin
+        bin[WIDTH-1] = gray[WIDTH-1];
+        for (i = WIDTH-2; i >= 0; i = i - 1) begin
+            bin[i] = bin[i+1] ^ gray[i];
+        end
+    end
+
+endmodule