summaryrefslogtreecommitdiffstats
path: root/sdr_lib/cic_strober.v
diff options
context:
space:
mode:
Diffstat (limited to 'sdr_lib/cic_strober.v')
-rw-r--r--sdr_lib/cic_strober.v45
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