From: matt <matt@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Wed, 1 Apr 2009 00:41:59 +0000 (+0000)
Subject: checkpoint
X-Git-Url: https://git.gag.com/?a=commitdiff_plain;h=cb1a975e2c6813325f9bb3613f6cc08ef6123faa;p=debian%2Fgnuradio

checkpoint


git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@10725 221aa14e-8319-0410-a670-987f0aec2ac5
---

diff --git a/usrp2/fpga/simple_gemac/address_filter.v b/usrp2/fpga/simple_gemac/address_filter.v
new file mode 100644
index 00000000..2d2f4df5
--- /dev/null
+++ b/usrp2/fpga/simple_gemac/address_filter.v
@@ -0,0 +1,34 @@
+
+
+module address_filter
+  (input clk,
+   input reset,
+   input go,
+   input [7:0] data,
+   input [47:0] address,
+   output match,
+   output done);
+
+   reg [2:0] af_state;
+
+   always @(posedge clk)
+     if(reset)
+       af_state     <= 0;
+     else
+       if(go)
+	 af_state <= (data == address[47:40]) ? 1 : 7;
+       else
+	 case(af_state)
+	   1 : af_state <= (data == address[39:32]) ? 2 : 7;
+	   2 : af_state <= (data == address[31:24]) ? 3 : 7;
+	   3 : af_state <= (data == address[23:16]) ? 4 : 7;
+	   4 : af_state <= (data == address[15:8])  ? 5 : 7;
+	   5 : af_state <= (data == address[7:0]) ? 6 : 7;
+	 endcase // case (af_state)
+
+   assign match  = (af_state==6);
+   assign done 	 = (af_state==6)|(af_state==7);
+   
+endmodule // address_filter
+
+