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Message
From: cvs at opencores.org<cvs@o...>
Date: Thu Jul 26 18:57:02 CEST 2007
Subject: [cvs-checkins] MODIFIED: dmt_tx ...
Date: 00/07/07 26:18:57 Modified: dmt_tx/const_encoder/tb tb_const_enc.v
Log:
Added test for 2-bit constellation map.
Revision Changes Path
1.4 dmt_tx/const_encoder/tb/tb_const_enc.v
http://www.opencores.org/cvsweb.shtml/dmt_tx/const_encoder/tb/tb_const_enc.v.diff?r1=1.3&r2=1.4
(In the diff below, changes in quantity of whitespace are not shown.)
Index: tb_const_enc.v
===================================================================
RCS file: /cvsroot/dannori/dmt_tx/const_encoder/tb/tb_const_enc.v,v
retrieving revision 1.3
retrieving revision 1.4
diff -u -b -r1.3 -r1.4
--- tb_const_enc.v 25 Jul 2007 01:17:43 -0000 1.3
+++ tb_const_enc.v 26 Jul 2007 16:57:01 -0000 1.4
@@ -45,8 +45,8 @@
reg [CONFAW-1:0] addr_i;
reg [CONFDW-1:0] conf_data_i;
wire [CNUMW-1:0] carrier_num_o;
-wire [CONSTW-1:0] x_o;
-wire [CONSTW-1:0] y_o;
+wire signed [CONSTW-1:0] x_o;
+wire signed [CONSTW-1:0] y_o;
//
// instantiate the DUT
@@ -67,6 +67,11 @@
.x_o(x_o),
.y_o(y_o));
+//
+// instantiate test data modules
+//
+const_map_2bit cm_2bit();
+
initial begin
clk = 0;
@@ -132,6 +137,11 @@
check_config(USED_C_ADR, 4);
check_config(F_BITS_ADR, 7);
+ //
+ // checking the constellation map
+ //
+ check_const_map(2);
+
#1000 $finish();
end // main test
@@ -215,4 +225,45 @@
endtask
+//
+// check constellation map
+//
+// This task feeds in data direct to the constellation encoder module
+// and checks the expected outcome.
+//
+// Given parameter is the bit size of the constellation map.
+//
+task check_const_map(input [3:0] bit);
+ integer len;
+ integer i;
+ begin
+ len = 1 << bit;
+ for(i=0; i<len; i=i+1) begin
+ $display("Testing %d bit constellation with input value %d", bit, i);
+ // feed input data
+ dut.bit_load <= bit;
+ dut.cin <= i;
+
+ @ (posedge clk);
+ @ (negedge clk);
+ // compare output with expected result
+ case (bit)
+ 1: $display("%d bit is not support constellation size", bit);
+ 2: begin
+ if(cm_2bit.re[i] !== x_o) begin
+ $display("Input: %d --> x_o expected: %d got: %d", i, cm_2bit.re[i], x_o);
+ end
+ if(cm_2bit.im[i] !== y_o) begin
+ $display("Input: %d --> y_o expected: %d got: %d", i, cm_2bit.im[i], y_o);
+ end
+ end
+ default: $display("%d is not an implemented bit size", bit);
+ endcase
+
+ end
+
+ end
+endtask
+
+
endmodule
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