Merged r9433:9527 from features/gr-usrp2 into trunk. Adds usrp2 and gr-usrp2 top-level components. Trunk passes distcheck with mb-gcc installed, but currently not without them. The key issue is that when mb-gcc is not installed, the build system skips over the usrp2/firmware directory, and the firmware include files don't get put into the dist tarball. But we can't do the usual DIST_SUBDIRS method as the firmware is a subpackage.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9528 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 45 insertions, 0 deletions

diff --git a/sdr_lib/cic_strober.v b/sdr_lib/cic_strober.v
new file mode 100644
index 000000000..40d76bdd9
--- /dev/null
+++ b/sdr_lib/cic_strober.v
@@ -0,0 +1,45 @@
+//
+//  USRP2 - Universal Software Radio Peripheral Mk II
+//
+//  Copyright (C) 2008 Matt Ettus
+//
+//  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 2 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, write to the Free Software
+//  Foundation, Inc., 51 Franklin Street, Boston, MA  02110-1301  USA
+//
+
+module cic_strober
+  #(parameter WIDTH=8)
+    ( input clock,
+      input reset,
+      input enable,
+      input [WIDTH-1:0] rate, // Rate should EQUAL to your desired divide ratio, no more -1 BS
+      input strobe_fast,
+      output wire strobe_slow );
+   
+   reg [WIDTH-1:0] counter;
+   wire      now = (counter==1);
+   assign    strobe_slow = now && enable && strobe_fast;
+   
+   always @(posedge clock)
+     if(reset)
+       counter <= 0; 
+     else if (~enable)
+       counter <= rate;
+     else if(strobe_fast)
+       if(now)
+	 counter <= rate;
+       else 
+	 counter <= counter - 1;
+   
+endmodule // cic_strober