1 files changed, 39 insertions, 0 deletions
diff --git a/fpga/usrp2/gpmc/edge_sync.v b/fpga/usrp2/gpmc/edge_sync.v
new file mode 100644
index 000000000..74f1a2f1c
--- /dev/null
+++ b/fpga/usrp2/gpmc/edge_sync.v
@@ -0,0 +1,39 @@
+//
+// Copyright 2011 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/>.
+//
+
+
+
+module edge_sync
+  #(parameter POSEDGE = 1)
+   (input clk,
+    input rst,
+    input sig,
+    output trig);
+   
+   reg [1:0] delay;
+   
+   always @(posedge clk)
+     if(rst)
+       delay <= 2'b00;
+     else
+       delay <= {delay[0],sig};
+   
+   assign trig = POSEDGE ? (delay==2'b01) : (delay==2'b10);
+   
+endmodule // edge_sync
+
+