Merged -r6379:6451 from jcorgan/radar into trunk. Adds working receiver implementation to gr-radar-mono.

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@6452 221aa14e-8319-0410-a670-987f0aec2ac5

2 files changed, 115 insertions, 0 deletions

diff --git a/gr-radar-mono/src/fpga/models/Makefile.am b/gr-radar-mono/src/fpga/models/Makefile.am
new file mode 100644
index 000000000..1d51f485f
--- /dev/null
+++ b/gr-radar-mono/src/fpga/models/Makefile.am
@@ -0,0 +1,27 @@
+#
+# Copyright 2007 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio 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, or (at your option)
+# any later version.
+# 
+# GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+include $(top_srcdir)/Makefile.common
+
+EXTRA_DIST = \
+	fifo_1clk.v
+
+MOSTLYCLEANFILES = *~
diff --git a/gr-radar-mono/src/fpga/models/fifo_1clk.v b/gr-radar-mono/src/fpga/models/fifo_1clk.v
new file mode 100644
index 000000000..93ada6c8d
--- /dev/null
+++ b/gr-radar-mono/src/fpga/models/fifo_1clk.v
@@ -0,0 +1,88 @@
+/* -*- verilog -*- */
+/*
+ * Copyright (C) 2003 Matt Ettus
+ * Copyright (C) 2007 Corgan Enterprises LLC
+ * 
+ * GNU Radio 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, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+// Model of Altera FIFO with common clock domain
+
+module fifo_1clk(data, wrreq, rdreq, clock, sclr, q,
+		 full, empty, usedw);
+
+   parameter width = 32;
+   parameter depth = 4096;
+   //`define rd_req 0;  // Set this to 0 for rd_ack, 1 for rd_req
+      
+   input [31:0]  data;
+   input 	 wrreq;
+   input 	 rdreq;
+   input 	 clock;
+   input 	 sclr;
+   output [31:0] q;
+   output 	 full;
+   output 	 empty;
+   output [11:0] usedw;
+   
+   reg [width-1:0] mem [0:depth-1];
+   reg [7:0] 	   rdptr;
+   reg [7:0] 	   wrptr;
+   
+`ifdef rd_req
+   reg [width-1:0] q;
+`else
+   wire [width-1:0] q;
+`endif
+   
+   reg [11:0] 	  usedw;
+   
+   integer 	    i;
+   
+   always @( sclr)
+     begin
+	wrptr <= #1 0;
+	rdptr <= #1 0;
+	for(i=0;i<depth;i=i+1)
+	  mem[i] <= #1 0;
+     end
+   
+   always @(posedge clock)
+     if(wrreq)
+       begin
+	  wrptr <= #1 wrptr+1;
+	  mem[wrptr] <= #1 data;
+       end
+   
+   always @(posedge clock)
+     if(rdreq)
+       begin
+   	  rdptr <= #1 rdptr+1;
+`ifdef rd_req
+	  q <= #1 mem[rdptr];
+`endif
+       end
+   
+`ifdef rd_req
+`else
+   assign q = mem[rdptr];
+`endif
+   
+   always @(posedge clock)
+     usedw <= #1 wrptr - rdptr;
+   
+   assign empty = (wrptr == rdptr);
+endmodule