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authorjcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5>2008-09-08 01:00:12 +0000
committerjcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5>2008-09-08 01:00:12 +0000
commit61f2f0214c5999ea42a368a4fc99f03d8eb28d1e (patch)
treee7e24a9adc05ff1422fe3ada9926a51634741b47 /eth/demo/verilog
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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
Diffstat (limited to 'eth/demo/verilog')
-rw-r--r--eth/demo/verilog/RAMB16_S1_S2.v1535
-rw-r--r--eth/demo/verilog/demo.ucf52
-rw-r--r--eth/demo/verilog/demo.v378
-rw-r--r--eth/demo/verilog/demo_packet_descriptor_memory.v384
-rw-r--r--eth/demo/verilog/demo_packet_generator.v274
-rw-r--r--eth/demo/verilog/demo_uart.v235
-rw-r--r--eth/demo/verilog/demo_wishbone_master.v376
-rw-r--r--eth/demo/verilog/tb_demo.v348
8 files changed, 3582 insertions, 0 deletions
diff --git a/eth/demo/verilog/RAMB16_S1_S2.v b/eth/demo/verilog/RAMB16_S1_S2.v
new file mode 100644
index 000000000..758760b95
--- /dev/null
+++ b/eth/demo/verilog/RAMB16_S1_S2.v
@@ -0,0 +1,1535 @@
+// $Header: /devl/xcs/repo/env/Databases/CAEInterfaces/verunilibs/data/unisims/RAMB16_S1_S2.v,v 1.10 2005/03/14 22:54:41 wloo Exp $
+///////////////////////////////////////////////////////////////////////////////
+// Copyright (c) 1995/2005 Xilinx, Inc.
+// All Right Reserved.
+///////////////////////////////////////////////////////////////////////////////
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor : Xilinx
+// \ \ \/ Version : 8.1i (I.13)
+// \ \ Description : Xilinx Functional Simulation Library Component
+// / / 16K-Bit Data and 2K-Bit Parity Dual Port Block RAM
+// /___/ /\ Filename : RAMB16_S1_S2.v
+// \ \ / \ Timestamp : Thu Mar 10 16:43:35 PST 2005
+// \___\/\___\
+//
+// Revision:
+// 03/23/04 - Initial version.
+// End Revision
+
+`ifdef legacy_model
+
+`timescale 1 ps / 1 ps
+
+module RAMB16_S1_S2 (DOA, DOB, ADDRA, ADDRB, CLKA, CLKB, DIA, DIB, ENA, ENB, SSRA, SSRB, WEA, WEB);
+
+ parameter INIT_A = 1'h0;
+ parameter INIT_B = 2'h0;
+ parameter SRVAL_A = 1'h0;
+ parameter SRVAL_B = 2'h0;
+ parameter WRITE_MODE_A = "WRITE_FIRST";
+ parameter WRITE_MODE_B = "WRITE_FIRST";
+ parameter SIM_COLLISION_CHECK = "ALL";
+ localparam SETUP_ALL = 1000;
+ localparam SETUP_READ_FIRST = 3000;
+
+ parameter INIT_00 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_01 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_02 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_03 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_04 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_05 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_06 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_07 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_08 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_09 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_0A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_0B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_0C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_0D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_0E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_0F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_10 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_11 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_12 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_13 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_14 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_15 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_16 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_17 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_18 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_19 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_20 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_21 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_22 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_23 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_24 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_25 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_26 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_27 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_28 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_29 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_30 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_31 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_32 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_33 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_34 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_35 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_36 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_37 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_38 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_39 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+
+ output [0:0] DOA;
+ reg [0:0] doa_out;
+ wire doa_out0;
+
+ input [13:0] ADDRA;
+ input [0:0] DIA;
+ input ENA, CLKA, WEA, SSRA;
+
+ output [1:0] DOB;
+ reg [1:0] dob_out;
+ wire dob_out0, dob_out1;
+
+ input [12:0] ADDRB;
+ input [1:0] DIB;
+ input ENB, CLKB, WEB, SSRB;
+
+ reg [18431:0] mem;
+ reg [8:0] count;
+ reg [1:0] wr_mode_a, wr_mode_b;
+
+ reg [5:0] dmi, dbi;
+ reg [5:0] pmi, pbi;
+
+ wire [13:0] addra_int;
+ reg [13:0] addra_reg;
+ wire [0:0] dia_int;
+ wire ena_int, clka_int, wea_int, ssra_int;
+ reg ena_reg, wea_reg, ssra_reg;
+ wire [12:0] addrb_int;
+ reg [12:0] addrb_reg;
+ wire [1:0] dib_int;
+ wire enb_int, clkb_int, web_int, ssrb_int;
+ reg display_flag;
+ reg enb_reg, web_reg, ssrb_reg;
+
+ time time_clka, time_clkb;
+ time time_clka_clkb;
+ time time_clkb_clka;
+
+ reg setup_all_a_b;
+ reg setup_all_b_a;
+ reg setup_zero;
+ reg setup_rf_a_b;
+ reg setup_rf_b_a;
+ reg [1:0] data_collision, data_collision_a_b, data_collision_b_a;
+ reg memory_collision, memory_collision_a_b, memory_collision_b_a;
+ reg address_collision, address_collision_a_b, address_collision_b_a;
+ reg change_clka;
+ reg change_clkb;
+
+ wire [14:0] data_addra_int;
+ wire [14:0] data_addra_reg;
+ wire [14:0] data_addrb_int;
+ wire [14:0] data_addrb_reg;
+ wire [15:0] parity_addra_int;
+ wire [15:0] parity_addra_reg;
+ wire [15:0] parity_addrb_int;
+ wire [15:0] parity_addrb_reg;
+
+ tri0 GSR = glbl.GSR;
+
+ always @(GSR)
+ if (GSR) begin
+ assign doa_out = INIT_A[0:0];
+ assign dob_out = INIT_B[1:0];
+ end
+ else begin
+ deassign doa_out;
+ deassign dob_out;
+ end
+
+ buf b_doa_out0 (doa_out0, doa_out[0]);
+ buf b_dob_out0 (dob_out0, dob_out[0]);
+ buf b_dob_out1 (dob_out1, dob_out[1]);
+
+ buf b_doa0 (DOA[0], doa_out0);
+ buf b_dob0 (DOB[0], dob_out0);
+ buf b_dob1 (DOB[1], dob_out1);
+
+ buf b_addra_0 (addra_int[0], ADDRA[0]);
+ buf b_addra_1 (addra_int[1], ADDRA[1]);
+ buf b_addra_2 (addra_int[2], ADDRA[2]);
+ buf b_addra_3 (addra_int[3], ADDRA[3]);
+ buf b_addra_4 (addra_int[4], ADDRA[4]);
+ buf b_addra_5 (addra_int[5], ADDRA[5]);
+ buf b_addra_6 (addra_int[6], ADDRA[6]);
+ buf b_addra_7 (addra_int[7], ADDRA[7]);
+ buf b_addra_8 (addra_int[8], ADDRA[8]);
+ buf b_addra_9 (addra_int[9], ADDRA[9]);
+ buf b_addra_10 (addra_int[10], ADDRA[10]);
+ buf b_addra_11 (addra_int[11], ADDRA[11]);
+ buf b_addra_12 (addra_int[12], ADDRA[12]);
+ buf b_addra_13 (addra_int[13], ADDRA[13]);
+ buf b_dia_0 (dia_int[0], DIA[0]);
+ buf b_ena (ena_int, ENA);
+ buf b_clka (clka_int, CLKA);
+ buf b_ssra (ssra_int, SSRA);
+ buf b_wea (wea_int, WEA);
+ buf b_addrb_0 (addrb_int[0], ADDRB[0]);
+ buf b_addrb_1 (addrb_int[1], ADDRB[1]);
+ buf b_addrb_2 (addrb_int[2], ADDRB[2]);
+ buf b_addrb_3 (addrb_int[3], ADDRB[3]);
+ buf b_addrb_4 (addrb_int[4], ADDRB[4]);
+ buf b_addrb_5 (addrb_int[5], ADDRB[5]);
+ buf b_addrb_6 (addrb_int[6], ADDRB[6]);
+ buf b_addrb_7 (addrb_int[7], ADDRB[7]);
+ buf b_addrb_8 (addrb_int[8], ADDRB[8]);
+ buf b_addrb_9 (addrb_int[9], ADDRB[9]);
+ buf b_addrb_10 (addrb_int[10], ADDRB[10]);
+ buf b_addrb_11 (addrb_int[11], ADDRB[11]);
+ buf b_addrb_12 (addrb_int[12], ADDRB[12]);
+ buf b_dib_0 (dib_int[0], DIB[0]);
+ buf b_dib_1 (dib_int[1], DIB[1]);
+ buf b_enb (enb_int, ENB);
+ buf b_clkb (clkb_int, CLKB);
+ buf b_ssrb (ssrb_int, SSRB);
+ buf b_web (web_int, WEB);
+
+ initial begin
+ for (count = 0; count < 256; count = count + 1) begin
+ mem[count] <= INIT_00[count];
+ mem[256 * 1 + count] <= INIT_01[count];
+ mem[256 * 2 + count] <= INIT_02[count];
+ mem[256 * 3 + count] <= INIT_03[count];
+ mem[256 * 4 + count] <= INIT_04[count];
+ mem[256 * 5 + count] <= INIT_05[count];
+ mem[256 * 6 + count] <= INIT_06[count];
+ mem[256 * 7 + count] <= INIT_07[count];
+ mem[256 * 8 + count] <= INIT_08[count];
+ mem[256 * 9 + count] <= INIT_09[count];
+ mem[256 * 10 + count] <= INIT_0A[count];
+ mem[256 * 11 + count] <= INIT_0B[count];
+ mem[256 * 12 + count] <= INIT_0C[count];
+ mem[256 * 13 + count] <= INIT_0D[count];
+ mem[256 * 14 + count] <= INIT_0E[count];
+ mem[256 * 15 + count] <= INIT_0F[count];
+ mem[256 * 16 + count] <= INIT_10[count];
+ mem[256 * 17 + count] <= INIT_11[count];
+ mem[256 * 18 + count] <= INIT_12[count];
+ mem[256 * 19 + count] <= INIT_13[count];
+ mem[256 * 20 + count] <= INIT_14[count];
+ mem[256 * 21 + count] <= INIT_15[count];
+ mem[256 * 22 + count] <= INIT_16[count];
+ mem[256 * 23 + count] <= INIT_17[count];
+ mem[256 * 24 + count] <= INIT_18[count];
+ mem[256 * 25 + count] <= INIT_19[count];
+ mem[256 * 26 + count] <= INIT_1A[count];
+ mem[256 * 27 + count] <= INIT_1B[count];
+ mem[256 * 28 + count] <= INIT_1C[count];
+ mem[256 * 29 + count] <= INIT_1D[count];
+ mem[256 * 30 + count] <= INIT_1E[count];
+ mem[256 * 31 + count] <= INIT_1F[count];
+ mem[256 * 32 + count] <= INIT_20[count];
+ mem[256 * 33 + count] <= INIT_21[count];
+ mem[256 * 34 + count] <= INIT_22[count];
+ mem[256 * 35 + count] <= INIT_23[count];
+ mem[256 * 36 + count] <= INIT_24[count];
+ mem[256 * 37 + count] <= INIT_25[count];
+ mem[256 * 38 + count] <= INIT_26[count];
+ mem[256 * 39 + count] <= INIT_27[count];
+ mem[256 * 40 + count] <= INIT_28[count];
+ mem[256 * 41 + count] <= INIT_29[count];
+ mem[256 * 42 + count] <= INIT_2A[count];
+ mem[256 * 43 + count] <= INIT_2B[count];
+ mem[256 * 44 + count] <= INIT_2C[count];
+ mem[256 * 45 + count] <= INIT_2D[count];
+ mem[256 * 46 + count] <= INIT_2E[count];
+ mem[256 * 47 + count] <= INIT_2F[count];
+ mem[256 * 48 + count] <= INIT_30[count];
+ mem[256 * 49 + count] <= INIT_31[count];
+ mem[256 * 50 + count] <= INIT_32[count];
+ mem[256 * 51 + count] <= INIT_33[count];
+ mem[256 * 52 + count] <= INIT_34[count];
+ mem[256 * 53 + count] <= INIT_35[count];
+ mem[256 * 54 + count] <= INIT_36[count];
+ mem[256 * 55 + count] <= INIT_37[count];
+ mem[256 * 56 + count] <= INIT_38[count];
+ mem[256 * 57 + count] <= INIT_39[count];
+ mem[256 * 58 + count] <= INIT_3A[count];
+ mem[256 * 59 + count] <= INIT_3B[count];
+ mem[256 * 60 + count] <= INIT_3C[count];
+ mem[256 * 61 + count] <= INIT_3D[count];
+ mem[256 * 62 + count] <= INIT_3E[count];
+ mem[256 * 63 + count] <= INIT_3F[count];
+ end
+ address_collision <= 0;
+ address_collision_a_b <= 0;
+ address_collision_b_a <= 0;
+ change_clka <= 0;
+ change_clkb <= 0;
+ data_collision <= 0;
+ data_collision_a_b <= 0;
+ data_collision_b_a <= 0;
+ memory_collision <= 0;
+ memory_collision_a_b <= 0;
+ memory_collision_b_a <= 0;
+ setup_all_a_b <= 0;
+ setup_all_b_a <= 0;
+ setup_zero <= 0;
+ setup_rf_a_b <= 0;
+ setup_rf_b_a <= 0;
+ end
+
+ assign data_addra_int = addra_int * 1;
+ assign data_addra_reg = addra_reg * 1;
+ assign data_addrb_int = addrb_int * 2;
+ assign data_addrb_reg = addrb_reg * 2;
+
+
+ initial begin
+
+ display_flag = 1;
+
+ case (SIM_COLLISION_CHECK)
+
+ "NONE" : begin
+ assign setup_all_a_b = 1'b0;
+ assign setup_all_b_a = 1'b0;
+ assign setup_zero = 1'b0;
+ assign setup_rf_a_b = 1'b0;
+ assign setup_rf_b_a = 1'b0;
+ assign display_flag = 0;
+ end
+ "WARNING_ONLY" : begin
+ assign data_collision = 2'b00;
+ assign data_collision_a_b = 2'b00;
+ assign data_collision_b_a = 2'b00;
+ assign memory_collision = 1'b0;
+ assign memory_collision_a_b = 1'b0;
+ assign memory_collision_b_a = 1'b0;
+ end
+ "GENERATE_X_ONLY" : begin
+ assign display_flag = 0;
+ end
+ "ALL" : ;
+ default : begin
+ $display("Attribute Syntax Error : The Attribute SIM_COLLISION_CHECK on RAMB16_S1_S2 instance %m is set to %s. Legal values for this attribute are ALL, NONE, WARNING_ONLY or GENERATE_X_ONLY.", SIM_COLLISION_CHECK);
+ $finish;
+ end
+
+ endcase // case(SIM_COLLISION_CHECK)
+
+ end // initial begin
+
+
+ always @(posedge clka_int) begin
+ time_clka = $time;
+ #0 time_clkb_clka = time_clka - time_clkb;
+ change_clka = ~change_clka;
+ end
+
+ always @(posedge clkb_int) begin
+ time_clkb = $time;
+ #0 time_clka_clkb = time_clkb - time_clka;
+ change_clkb = ~change_clkb;
+ end
+
+ always @(change_clkb) begin
+ if ((0 < time_clka_clkb) && (time_clka_clkb < SETUP_ALL))
+ setup_all_a_b = 1;
+ if ((0 < time_clka_clkb) && (time_clka_clkb < SETUP_READ_FIRST))
+ setup_rf_a_b = 1;
+ end
+
+ always @(change_clka) begin
+ if ((0 < time_clkb_clka) && (time_clkb_clka < SETUP_ALL))
+ setup_all_b_a = 1;
+ if ((0 < time_clkb_clka) && (time_clkb_clka < SETUP_READ_FIRST))
+ setup_rf_b_a = 1;
+ end
+
+ always @(change_clkb or change_clka) begin
+ if ((time_clkb_clka == 0) && (time_clka_clkb == 0))
+ setup_zero = 1;
+ end
+
+ always @(posedge setup_zero) begin
+ if ((ena_int == 1) && (wea_int == 1) &&
+ (enb_int == 1) && (web_int == 1) &&
+ (data_addra_int[14:1] == data_addrb_int[14:1]))
+ memory_collision <= 1;
+ end
+
+ always @(posedge setup_all_a_b or posedge setup_rf_a_b) begin
+ if ((ena_reg == 1) && (wea_reg == 1) &&
+ (enb_int == 1) && (web_int == 1) &&
+ (data_addra_reg[14:1] == data_addrb_int[14:1]))
+ memory_collision_a_b <= 1;
+ end
+
+ always @(posedge setup_all_b_a or posedge setup_rf_b_a) begin
+ if ((ena_int == 1) && (wea_int == 1) &&
+ (enb_reg == 1) && (web_reg == 1) &&
+ (data_addra_int[14:1] == data_addrb_reg[14:1]))
+ memory_collision_b_a <= 1;
+ end
+
+ always @(posedge setup_all_a_b) begin
+ if (data_addra_reg[14:1] == data_addrb_int[14:1]) begin
+ if ((ena_reg == 1) && (enb_int == 1)) begin
+ case ({wr_mode_a, wr_mode_b, wea_reg, web_int})
+ 6'b000011 : begin data_collision_a_b <= 2'b11; display_wa_wb; end
+ 6'b000111 : begin data_collision_a_b <= 2'b11; display_wa_wb; end
+ 6'b001011 : begin data_collision_a_b <= 2'b10; display_wa_wb; end
+// 6'b010011 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+// 6'b010111 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+// 6'b011011 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+ 6'b100011 : begin data_collision_a_b <= 2'b01; display_wa_wb; end
+ 6'b100111 : begin data_collision_a_b <= 2'b01; display_wa_wb; end
+ 6'b101011 : begin display_wa_wb; end
+ 6'b000001 : begin data_collision_a_b <= 2'b10; display_ra_wb; end
+// 6'b000101 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+ 6'b001001 : begin data_collision_a_b <= 2'b10; display_ra_wb; end
+ 6'b010001 : begin data_collision_a_b <= 2'b10; display_ra_wb; end
+// 6'b010101 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+ 6'b011001 : begin data_collision_a_b <= 2'b10; display_ra_wb; end
+ 6'b100001 : begin data_collision_a_b <= 2'b10; display_ra_wb; end
+// 6'b100101 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+ 6'b101001 : begin data_collision_a_b <= 2'b10; display_ra_wb; end
+ 6'b000010 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+ 6'b000110 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+ 6'b001010 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+// 6'b010010 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+// 6'b010110 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+// 6'b011010 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+ 6'b100010 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+ 6'b100110 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+ 6'b101010 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+ endcase
+ end
+ end
+ setup_all_a_b <= 0;
+ end
+
+
+ always @(posedge setup_all_b_a) begin
+ if (data_addra_int[14:1] == data_addrb_reg[14:1]) begin
+ if ((ena_int == 1) && (enb_reg == 1)) begin
+ case ({wr_mode_a, wr_mode_b, wea_int, web_reg})
+ 6'b000011 : begin data_collision_b_a <= 2'b11; display_wa_wb; end
+// 6'b000111 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+ 6'b001011 : begin data_collision_b_a <= 2'b10; display_wa_wb; end
+ 6'b010011 : begin data_collision_b_a <= 2'b11; display_wa_wb; end
+// 6'b010111 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+ 6'b011011 : begin data_collision_b_a <= 2'b10; display_wa_wb; end
+ 6'b100011 : begin data_collision_b_a <= 2'b01; display_wa_wb; end
+ 6'b100111 : begin data_collision_b_a <= 2'b01; display_wa_wb; end
+ 6'b101011 : begin display_wa_wb; end
+ 6'b000001 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b000101 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b001001 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b010001 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b010101 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b011001 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b100001 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b100101 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b101001 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b000010 : begin data_collision_b_a <= 2'b01; display_wa_rb; end
+ 6'b000110 : begin data_collision_b_a <= 2'b01; display_wa_rb; end
+ 6'b001010 : begin data_collision_b_a <= 2'b01; display_wa_rb; end
+// 6'b010010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b010110 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b011010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+ 6'b100010 : begin data_collision_b_a <= 2'b01; display_wa_rb; end
+ 6'b100110 : begin data_collision_b_a <= 2'b01; display_wa_rb; end
+ 6'b101010 : begin data_collision_b_a <= 2'b01; display_wa_rb; end
+ endcase
+ end
+ end
+ setup_all_b_a <= 0;
+ end
+
+
+ always @(posedge setup_zero) begin
+ if (data_addra_int[14:1] == data_addrb_int[14:1]) begin
+ if ((ena_int == 1) && (enb_int == 1)) begin
+ case ({wr_mode_a, wr_mode_b, wea_int, web_int})
+ 6'b000011 : begin data_collision <= 2'b11; display_wa_wb; end
+ 6'b000111 : begin data_collision <= 2'b11; display_wa_wb; end
+ 6'b001011 : begin data_collision <= 2'b10; display_wa_wb; end
+ 6'b010011 : begin data_collision <= 2'b11; display_wa_wb; end
+ 6'b010111 : begin data_collision <= 2'b11; display_wa_wb; end
+ 6'b011011 : begin data_collision <= 2'b10; display_wa_wb; end
+ 6'b100011 : begin data_collision <= 2'b01; display_wa_wb; end
+ 6'b100111 : begin data_collision <= 2'b01; display_wa_wb; end
+ 6'b101011 : begin display_wa_wb; end
+ 6'b000001 : begin data_collision <= 2'b10; display_ra_wb; end
+// 6'b000101 : begin data_collision <= 2'b00; display_ra_wb; end
+ 6'b001001 : begin data_collision <= 2'b10; display_ra_wb; end
+ 6'b010001 : begin data_collision <= 2'b10; display_ra_wb; end
+// 6'b010101 : begin data_collision <= 2'b00; display_ra_wb; end
+ 6'b011001 : begin data_collision <= 2'b10; display_ra_wb; end
+ 6'b100001 : begin data_collision <= 2'b10; display_ra_wb; end
+// 6'b100101 : begin data_collision <= 2'b00; display_ra_wb; end
+ 6'b101001 : begin data_collision <= 2'b10; display_ra_wb; end
+ 6'b000010 : begin data_collision <= 2'b01; display_wa_rb; end
+ 6'b000110 : begin data_collision <= 2'b01; display_wa_rb; end
+ 6'b001010 : begin data_collision <= 2'b01; display_wa_rb; end
+// 6'b010010 : begin data_collision <= 2'b00; display_wa_rb; end
+// 6'b010110 : begin data_collision <= 2'b00; display_wa_rb; end
+// 6'b011010 : begin data_collision <= 2'b00; display_wa_rb; end
+ 6'b100010 : begin data_collision <= 2'b01; display_wa_rb; end
+ 6'b100110 : begin data_collision <= 2'b01; display_wa_rb; end
+ 6'b101010 : begin data_collision <= 2'b01; display_wa_rb; end
+ endcase
+ end
+ end
+ setup_zero <= 0;
+ end
+
+ task display_ra_wb;
+ begin
+ if (display_flag)
+ $display("Memory Collision Error on RAMB16_S1_S2:%m at simulation time %.3f ns\nA read was performed on address %h (hex) of Port A while a write was requested to the same address on Port B. The write will be successful however the read value on Port A is unknown until the next CLKA cycle.", $time/1000.0, addra_int);
+ end
+ endtask
+
+ task display_wa_rb;
+ begin
+ if (display_flag)
+ $display("Memory Collision Error on RAMB16_S1_S2:%m at simulation time %.3f ns\nA read was performed on address %h (hex) of Port B while a write was requested to the same address on Port A. The write will be successful however the read value on Port B is unknown until the next CLKB cycle.", $time/1000.0, addrb_int);
+ end
+ endtask
+
+ task display_wa_wb;
+ begin
+ if (display_flag)
+ $display("Memory Collision Error on RAMB16_S1_S2:%m at simulation time %.3f ns\nA write was requested to the same address simultaneously at both Port A and Port B of the RAM. The contents written to the RAM at address location %h (hex) of Port A and address location %h (hex) of Port B are unknown.", $time/1000.0, addra_int, addrb_int);
+ end
+ endtask
+
+
+ always @(posedge setup_rf_a_b) begin
+ if (data_addra_reg[14:1] == data_addrb_int[14:1]) begin
+ if ((ena_reg == 1) && (enb_int == 1)) begin
+ case ({wr_mode_a, wr_mode_b, wea_reg, web_int})
+// 6'b000011 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+// 6'b000111 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+// 6'b001011 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+ 6'b010011 : begin data_collision_a_b <= 2'b11; display_wa_wb; end
+ 6'b010111 : begin data_collision_a_b <= 2'b11; display_wa_wb; end
+ 6'b011011 : begin data_collision_a_b <= 2'b10; display_wa_wb; end
+// 6'b100011 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+// 6'b100111 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+// 6'b101011 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+// 6'b000001 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b000101 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b001001 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b010001 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b010101 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b011001 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b100001 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b100101 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b101001 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b000010 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+// 6'b000110 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+// 6'b001010 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+ 6'b010010 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+ 6'b010110 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+ 6'b011010 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+// 6'b100010 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+// 6'b100110 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+// 6'b101010 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+ endcase
+ end
+ end
+ setup_rf_a_b <= 0;
+ end
+
+
+ always @(posedge setup_rf_b_a) begin
+ if (data_addra_int[14:1] == data_addrb_reg[14:1]) begin
+ if ((ena_int == 1) && (enb_reg == 1)) begin
+ case ({wr_mode_a, wr_mode_b, wea_int, web_reg})
+// 6'b000011 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+ 6'b000111 : begin data_collision_b_a <= 2'b11; display_wa_wb; end
+// 6'b001011 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+// 6'b010011 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+ 6'b010111 : begin data_collision_b_a <= 2'b11; display_wa_wb; end
+// 6'b011011 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+// 6'b100011 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+ 6'b100111 : begin data_collision_b_a <= 2'b01; display_wa_wb; end
+// 6'b101011 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+// 6'b000001 : begin data_collision_b_a <= 2'b00; display_ra_wb; end
+ 6'b000101 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+// 6'b001001 : begin data_collision_b_a <= 2'b00; display_ra_wb; end
+// 6'b010001 : begin data_collision_b_a <= 2'b00; display_ra_wb; end
+ 6'b010101 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+// 6'b011001 : begin data_collision_b_a <= 2'b00; display_ra_wb; end
+// 6'b100001 : begin data_collision_b_a <= 2'b00; display_ra_wb; end
+ 6'b100101 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+// 6'b101001 : begin data_collision_b_a <= 2'b00; display_ra_wb; end
+// 6'b000010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b000110 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b001010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b010010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b010110 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b011010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b100010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b100110 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b101010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+ endcase
+ end
+ end
+ setup_rf_b_a <= 0;
+ end
+
+
+ always @(posedge clka_int) begin
+ addra_reg <= addra_int;
+ ena_reg <= ena_int;
+ ssra_reg <= ssra_int;
+ wea_reg <= wea_int;
+ end
+
+ always @(posedge clkb_int) begin
+ addrb_reg <= addrb_int;
+ enb_reg <= enb_int;
+ ssrb_reg <= ssrb_int;
+ web_reg <= web_int;
+ end
+
+ // Data
+ always @(posedge memory_collision) begin
+ for (dmi = 0; dmi < 1; dmi = dmi + 1) begin
+ mem[data_addra_int + dmi] <= 1'bX;
+ end
+ memory_collision <= 0;
+ end
+
+ always @(posedge memory_collision_a_b) begin
+ for (dmi = 0; dmi < 1; dmi = dmi + 1) begin
+ mem[data_addra_reg + dmi] <= 1'bX;
+ end
+ memory_collision_a_b <= 0;
+ end
+
+ always @(posedge memory_collision_b_a) begin
+ for (dmi = 0; dmi < 1; dmi = dmi + 1) begin
+ mem[data_addra_int + dmi] <= 1'bX;
+ end
+ memory_collision_b_a <= 0;
+ end
+
+ always @(posedge data_collision[1]) begin
+ if (ssra_int == 0) begin
+ doa_out <= 1'bX;
+ end
+ data_collision[1] <= 0;
+ end
+
+ always @(posedge data_collision[0]) begin
+ if (ssrb_int == 0) begin
+ for (dbi = 0; dbi < 1; dbi = dbi + 1) begin
+ dob_out[data_addra_int[0 : 0] + dbi] <= 1'bX;
+ end
+ end
+ data_collision[0] <= 0;
+ end
+
+ always @(posedge data_collision_a_b[1]) begin
+ if (ssra_reg == 0) begin
+ doa_out <= 1'bX;
+ end
+ data_collision_a_b[1] <= 0;
+ end
+
+ always @(posedge data_collision_a_b[0]) begin
+ if (ssrb_int == 0) begin
+ for (dbi = 0; dbi < 1; dbi = dbi + 1) begin
+ dob_out[data_addra_reg[0 : 0] + dbi] <= 1'bX;
+ end
+ end
+ data_collision_a_b[0] <= 0;
+ end
+
+ always @(posedge data_collision_b_a[1]) begin
+ if (ssra_int == 0) begin
+ doa_out <= 1'bX;
+ end
+ data_collision_b_a[1] <= 0;
+ end
+
+ always @(posedge data_collision_b_a[0]) begin
+ if (ssrb_reg == 0) begin
+ for (dbi = 0; dbi < 1; dbi = dbi + 1) begin
+ dob_out[data_addra_int[0 : 0] + dbi] <= 1'bX;
+ end
+ end
+ data_collision_b_a[0] <= 0;
+ end
+
+
+ initial begin
+ case (WRITE_MODE_A)
+ "WRITE_FIRST" : wr_mode_a <= 2'b00;
+ "READ_FIRST" : wr_mode_a <= 2'b01;
+ "NO_CHANGE" : wr_mode_a <= 2'b10;
+ default : begin
+ $display("Attribute Syntax Error : The Attribute WRITE_MODE_A on RAMB16_S1_S2 instance %m is set to %s. Legal values for this attribute are WRITE_FIRST, READ_FIRST or NO_CHANGE.", WRITE_MODE_A);
+ $finish;
+ end
+ endcase
+ end
+
+ initial begin
+ case (WRITE_MODE_B)
+ "WRITE_FIRST" : wr_mode_b <= 2'b00;
+ "READ_FIRST" : wr_mode_b <= 2'b01;
+ "NO_CHANGE" : wr_mode_b <= 2'b10;
+ default : begin
+ $display("Attribute Syntax Error : The Attribute WRITE_MODE_B on RAMB16_S1_S2 instance %m is set to %s. Legal values for this attribute are WRITE_FIRST, READ_FIRST or NO_CHANGE.", WRITE_MODE_B);
+ $finish;
+ end
+ endcase
+ end
+
+ // Port A
+ always @(posedge clka_int) begin
+ if (ena_int == 1'b1) begin
+ if (ssra_int == 1'b1) begin
+ doa_out[0] <= SRVAL_A[0];
+ end
+ else begin
+ if (wea_int == 1'b1) begin
+ if (wr_mode_a == 2'b00) begin
+ doa_out <= dia_int;
+ end
+ else if (wr_mode_a == 2'b01) begin
+ doa_out[0] <= mem[data_addra_int + 0];
+ end
+ end
+ else begin
+ doa_out[0] <= mem[data_addra_int + 0];
+ end
+ end
+ end
+ end
+
+ always @(posedge clka_int) begin
+ if (ena_int == 1'b1 && wea_int == 1'b1) begin
+ mem[data_addra_int + 0] <= dia_int[0];
+ end
+ end
+
+ // Port B
+ always @(posedge clkb_int) begin
+ if (enb_int == 1'b1) begin
+ if (ssrb_int == 1'b1) begin
+ dob_out[0] <= SRVAL_B[0];
+ dob_out[1] <= SRVAL_B[1];
+ end
+ else begin
+ if (web_int == 1'b1) begin
+ if (wr_mode_b == 2'b00) begin
+ dob_out <= dib_int;
+ end
+ else if (wr_mode_b == 2'b01) begin
+ dob_out[0] <= mem[data_addrb_int + 0];
+ dob_out[1] <= mem[data_addrb_int + 1];
+ end
+ end
+ else begin
+ dob_out[0] <= mem[data_addrb_int + 0];
+ dob_out[1] <= mem[data_addrb_int + 1];
+ end
+ end
+ end
+ end
+
+ always @(posedge clkb_int) begin
+ if (enb_int == 1'b1 && web_int == 1'b1) begin
+ mem[data_addrb_int + 0] <= dib_int[0];
+ mem[data_addrb_int + 1] <= dib_int[1];
+ end
+ end
+
+ specify
+ (CLKA *> DOA) = (100, 100);
+ (CLKB *> DOB) = (100, 100);
+ endspecify
+
+endmodule
+
+`else
+
+// $Header: /devl/xcs/repo/env/Databases/CAEInterfaces/verunilibs/data/unisims/RAMB16_S1_S2.v,v 1.10 2005/03/14 22:54:41 wloo Exp $
+///////////////////////////////////////////////////////////////////////////////
+// Copyright (c) 1995/2005 Xilinx, Inc.
+// All Right Reserved.
+///////////////////////////////////////////////////////////////////////////////
+// ____ ____
+// / /\/ /
+// /___/ \ / Vendor : Xilinx
+// \ \ \/ Version : 8.1i (I.13)
+// \ \ Description : Xilinx Timing Simulation Library Component
+// / / 16K-Bit Data and 2K-Bit Parity Dual Port Block RAM
+// /___/ /\ Filename : RAMB16_S1_S2.v
+// \ \ / \ Timestamp : Thu Mar 10 16:44:01 PST 2005
+// \___\/\___\
+//
+// Revision:
+// 03/23/04 - Initial version.
+// 03/10/05 - Initialized outputs.
+// End Revision
+
+`timescale 1 ps/1 ps
+
+module RAMB16_S1_S2 (DOA, DOB, ADDRA, ADDRB, CLKA, CLKB, DIA, DIB, ENA, ENB, SSRA, SSRB, WEA, WEB);
+
+ parameter INIT_A = 1'h0;
+ parameter INIT_B = 2'h0;
+ parameter SRVAL_A = 1'h0;
+ parameter SRVAL_B = 2'h0;
+ parameter WRITE_MODE_A = "WRITE_FIRST";
+ parameter WRITE_MODE_B = "WRITE_FIRST";
+ parameter SIM_COLLISION_CHECK = "ALL";
+ localparam SETUP_ALL = 1000;
+ localparam SETUP_READ_FIRST = 3000;
+
+ parameter INIT_00 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_01 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_02 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_03 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_04 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_05 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_06 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_07 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_08 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_09 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_0A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_0B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_0C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_0D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_0E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_0F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_10 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_11 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_12 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_13 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_14 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_15 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_16 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_17 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_18 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_19 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_1F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_20 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_21 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_22 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_23 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_24 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_25 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_26 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_27 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_28 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_29 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_2F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_30 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_31 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_32 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_33 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_34 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_35 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_36 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_37 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_38 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_39 = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3A = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3B = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3C = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3D = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3E = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+ parameter INIT_3F = 256'h0000000000000000000000000000000000000000000000000000000000000000;
+
+ output [0:0] DOA;
+ output [1:0] DOB;
+
+ input [13:0] ADDRA;
+ input [0:0] DIA;
+ input ENA, CLKA, WEA, SSRA;
+ input [12:0] ADDRB;
+ input [1:0] DIB;
+ input ENB, CLKB, WEB, SSRB;
+
+ reg [0:0] doa_out = INIT_A[0:0];
+ reg [1:0] dob_out = INIT_B[1:0];
+
+ reg [1:0] mem [8191:0];
+
+ reg [8:0] count, countp;
+ reg [1:0] wr_mode_a, wr_mode_b;
+
+ reg [5:0] dmi, dbi;
+ reg [5:0] pmi, pbi;
+
+ wire [13:0] addra_int;
+ reg [13:0] addra_reg;
+ wire [0:0] dia_int;
+ wire ena_int, clka_int, wea_int, ssra_int;
+ reg ena_reg, wea_reg, ssra_reg;
+ wire [12:0] addrb_int;
+ reg [12:0] addrb_reg;
+ wire [1:0] dib_int;
+ wire enb_int, clkb_int, web_int, ssrb_int;
+ reg display_flag, output_flag;
+ reg enb_reg, web_reg, ssrb_reg;
+
+ time time_clka, time_clkb;
+ time time_clka_clkb;
+ time time_clkb_clka;
+
+ reg setup_all_a_b;
+ reg setup_all_b_a;
+ reg setup_zero;
+ reg setup_rf_a_b;
+ reg setup_rf_b_a;
+ reg [1:0] data_collision, data_collision_a_b, data_collision_b_a;
+ reg memory_collision, memory_collision_a_b, memory_collision_b_a;
+ reg change_clka;
+ reg change_clkb;
+
+ wire [14:0] data_addra_int;
+ wire [14:0] data_addra_reg;
+ wire [14:0] data_addrb_int;
+ wire [14:0] data_addrb_reg;
+
+ wire dia_enable = ena_int && wea_int;
+ wire dib_enable = enb_int && web_int;
+
+ tri0 GSR = glbl.GSR;
+ wire gsr_int;
+
+ buf b_gsr (gsr_int, GSR);
+
+ buf b_doa [0:0] (DOA, doa_out);
+ buf b_addra [13:0] (addra_int, ADDRA);
+ buf b_dia [0:0] (dia_int, DIA);
+ buf b_ena (ena_int, ENA);
+ buf b_clka (clka_int, CLKA);
+ buf b_ssra (ssra_int, SSRA);
+ buf b_wea (wea_int, WEA);
+
+ buf b_dob [1:0] (DOB, dob_out);
+ buf b_addrb [12:0] (addrb_int, ADDRB);
+ buf b_dib [1:0] (dib_int, DIB);
+ buf b_enb (enb_int, ENB);
+ buf b_clkb (clkb_int, CLKB);
+ buf b_ssrb (ssrb_int, SSRB);
+ buf b_web (web_int, WEB);
+
+
+ always @(gsr_int)
+ if (gsr_int) begin
+ assign {doa_out} = INIT_A;
+ assign {dob_out} = INIT_B;
+ end
+ else begin
+ deassign doa_out;
+ deassign dob_out;
+ end
+
+
+ initial begin
+
+ for (count = 0; count < 128; count = count + 1) begin
+ mem[count] = INIT_00[(count * 2) +: 2];
+ mem[128 * 1 + count] = INIT_01[(count * 2) +: 2];
+ mem[128 * 2 + count] = INIT_02[(count * 2) +: 2];
+ mem[128 * 3 + count] = INIT_03[(count * 2) +: 2];
+ mem[128 * 4 + count] = INIT_04[(count * 2) +: 2];
+ mem[128 * 5 + count] = INIT_05[(count * 2) +: 2];
+ mem[128 * 6 + count] = INIT_06[(count * 2) +: 2];
+ mem[128 * 7 + count] = INIT_07[(count * 2) +: 2];
+ mem[128 * 8 + count] = INIT_08[(count * 2) +: 2];
+ mem[128 * 9 + count] = INIT_09[(count * 2) +: 2];
+ mem[128 * 10 + count] = INIT_0A[(count * 2) +: 2];
+ mem[128 * 11 + count] = INIT_0B[(count * 2) +: 2];
+ mem[128 * 12 + count] = INIT_0C[(count * 2) +: 2];
+ mem[128 * 13 + count] = INIT_0D[(count * 2) +: 2];
+ mem[128 * 14 + count] = INIT_0E[(count * 2) +: 2];
+ mem[128 * 15 + count] = INIT_0F[(count * 2) +: 2];
+ mem[128 * 16 + count] = INIT_10[(count * 2) +: 2];
+ mem[128 * 17 + count] = INIT_11[(count * 2) +: 2];
+ mem[128 * 18 + count] = INIT_12[(count * 2) +: 2];
+ mem[128 * 19 + count] = INIT_13[(count * 2) +: 2];
+ mem[128 * 20 + count] = INIT_14[(count * 2) +: 2];
+ mem[128 * 21 + count] = INIT_15[(count * 2) +: 2];
+ mem[128 * 22 + count] = INIT_16[(count * 2) +: 2];
+ mem[128 * 23 + count] = INIT_17[(count * 2) +: 2];
+ mem[128 * 24 + count] = INIT_18[(count * 2) +: 2];
+ mem[128 * 25 + count] = INIT_19[(count * 2) +: 2];
+ mem[128 * 26 + count] = INIT_1A[(count * 2) +: 2];
+ mem[128 * 27 + count] = INIT_1B[(count * 2) +: 2];
+ mem[128 * 28 + count] = INIT_1C[(count * 2) +: 2];
+ mem[128 * 29 + count] = INIT_1D[(count * 2) +: 2];
+ mem[128 * 30 + count] = INIT_1E[(count * 2) +: 2];
+ mem[128 * 31 + count] = INIT_1F[(count * 2) +: 2];
+ mem[128 * 32 + count] = INIT_20[(count * 2) +: 2];
+ mem[128 * 33 + count] = INIT_21[(count * 2) +: 2];
+ mem[128 * 34 + count] = INIT_22[(count * 2) +: 2];
+ mem[128 * 35 + count] = INIT_23[(count * 2) +: 2];
+ mem[128 * 36 + count] = INIT_24[(count * 2) +: 2];
+ mem[128 * 37 + count] = INIT_25[(count * 2) +: 2];
+ mem[128 * 38 + count] = INIT_26[(count * 2) +: 2];
+ mem[128 * 39 + count] = INIT_27[(count * 2) +: 2];
+ mem[128 * 40 + count] = INIT_28[(count * 2) +: 2];
+ mem[128 * 41 + count] = INIT_29[(count * 2) +: 2];
+ mem[128 * 42 + count] = INIT_2A[(count * 2) +: 2];
+ mem[128 * 43 + count] = INIT_2B[(count * 2) +: 2];
+ mem[128 * 44 + count] = INIT_2C[(count * 2) +: 2];
+ mem[128 * 45 + count] = INIT_2D[(count * 2) +: 2];
+ mem[128 * 46 + count] = INIT_2E[(count * 2) +: 2];
+ mem[128 * 47 + count] = INIT_2F[(count * 2) +: 2];
+ mem[128 * 48 + count] = INIT_30[(count * 2) +: 2];
+ mem[128 * 49 + count] = INIT_31[(count * 2) +: 2];
+ mem[128 * 50 + count] = INIT_32[(count * 2) +: 2];
+ mem[128 * 51 + count] = INIT_33[(count * 2) +: 2];
+ mem[128 * 52 + count] = INIT_34[(count * 2) +: 2];
+ mem[128 * 53 + count] = INIT_35[(count * 2) +: 2];
+ mem[128 * 54 + count] = INIT_36[(count * 2) +: 2];
+ mem[128 * 55 + count] = INIT_37[(count * 2) +: 2];
+ mem[128 * 56 + count] = INIT_38[(count * 2) +: 2];
+ mem[128 * 57 + count] = INIT_39[(count * 2) +: 2];
+ mem[128 * 58 + count] = INIT_3A[(count * 2) +: 2];
+ mem[128 * 59 + count] = INIT_3B[(count * 2) +: 2];
+ mem[128 * 60 + count] = INIT_3C[(count * 2) +: 2];
+ mem[128 * 61 + count] = INIT_3D[(count * 2) +: 2];
+ mem[128 * 62 + count] = INIT_3E[(count * 2) +: 2];
+ mem[128 * 63 + count] = INIT_3F[(count * 2) +: 2];
+ end
+
+
+ change_clka <= 0;
+ change_clkb <= 0;
+ data_collision <= 0;
+ data_collision_a_b <= 0;
+ data_collision_b_a <= 0;
+ memory_collision <= 0;
+ memory_collision_a_b <= 0;
+ memory_collision_b_a <= 0;
+ setup_all_a_b <= 0;
+ setup_all_b_a <= 0;
+ setup_zero <= 0;
+ setup_rf_a_b <= 0;
+ setup_rf_b_a <= 0;
+ end
+
+ assign data_addra_int = addra_int * 1;
+ assign data_addra_reg = addra_reg * 1;
+ assign data_addrb_int = addrb_int * 2;
+ assign data_addrb_reg = addrb_reg * 2;
+
+
+ initial begin
+
+ display_flag = 1;
+ output_flag = 1;
+
+ case (SIM_COLLISION_CHECK)
+
+ "NONE" : begin
+ output_flag = 0;
+ display_flag = 0;
+ end
+ "WARNING_ONLY" : output_flag = 0;
+ "GENERATE_ONLY" : display_flag = 0;
+ "ALL" : ;
+
+ default : begin
+ $display("Attribute Syntax Error : The Attribute SIM_COLLISION_CHECK on RAMB16_S1_S2 instance %m is set to %s. Legal values for this attribute are ALL, NONE, WARNING_ONLY or GENERATE_ONLY.", SIM_COLLISION_CHECK);
+ $finish;
+ end
+
+ endcase // case(SIM_COLLISION_CHECK)
+
+ end // initial begin
+
+
+ always @(posedge clka_int) begin
+ if ((output_flag || display_flag)) begin
+ time_clka = $time;
+ #0 time_clkb_clka = time_clka - time_clkb;
+ change_clka = ~change_clka;
+ end
+ end
+
+ always @(posedge clkb_int) begin
+ if ((output_flag || display_flag)) begin
+ time_clkb = $time;
+ #0 time_clka_clkb = time_clkb - time_clka;
+ change_clkb = ~change_clkb;
+ end
+ end
+
+ always @(change_clkb) begin
+ if ((0 < time_clka_clkb) && (time_clka_clkb < SETUP_ALL))
+ setup_all_a_b = 1;
+ if ((0 < time_clka_clkb) && (time_clka_clkb < SETUP_READ_FIRST))
+ setup_rf_a_b = 1;
+ end
+
+ always @(change_clka) begin
+ if ((0 < time_clkb_clka) && (time_clkb_clka < SETUP_ALL))
+ setup_all_b_a = 1;
+ if ((0 < time_clkb_clka) && (time_clkb_clka < SETUP_READ_FIRST))
+ setup_rf_b_a = 1;
+ end
+
+ always @(change_clkb or change_clka) begin
+ if ((time_clkb_clka == 0) && (time_clka_clkb == 0))
+ setup_zero = 1;
+ end
+
+ always @(posedge setup_zero) begin
+ if ((ena_int == 1) && (wea_int == 1) &&
+ (enb_int == 1) && (web_int == 1) &&
+ (data_addra_int[14:1] == data_addrb_int[14:1]))
+ memory_collision <= 1;
+ end
+
+ always @(posedge setup_all_a_b or posedge setup_rf_a_b) begin
+ if ((ena_reg == 1) && (wea_reg == 1) &&
+ (enb_int == 1) && (web_int == 1) &&
+ (data_addra_reg[14:1] == data_addrb_int[14:1]))
+ memory_collision_a_b <= 1;
+ end
+
+ always @(posedge setup_all_b_a or posedge setup_rf_b_a) begin
+ if ((ena_int == 1) && (wea_int == 1) &&
+ (enb_reg == 1) && (web_reg == 1) &&
+ (data_addra_int[14:1] == data_addrb_reg[14:1]))
+ memory_collision_b_a <= 1;
+ end
+
+ always @(posedge setup_all_a_b) begin
+ if (data_addra_reg[14:1] == data_addrb_int[14:1]) begin
+ if ((ena_reg == 1) && (enb_int == 1)) begin
+ case ({wr_mode_a, wr_mode_b, wea_reg, web_int})
+ 6'b000011 : begin data_collision_a_b <= 2'b11; display_wa_wb; end
+ 6'b000111 : begin data_collision_a_b <= 2'b11; display_wa_wb; end
+ 6'b001011 : begin data_collision_a_b <= 2'b10; display_wa_wb; end
+// 6'b010011 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+// 6'b010111 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+// 6'b011011 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+ 6'b100011 : begin data_collision_a_b <= 2'b01; display_wa_wb; end
+ 6'b100111 : begin data_collision_a_b <= 2'b01; display_wa_wb; end
+ 6'b101011 : begin display_wa_wb; end
+ 6'b000001 : begin data_collision_a_b <= 2'b10; display_ra_wb; end
+// 6'b000101 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+ 6'b001001 : begin data_collision_a_b <= 2'b10; display_ra_wb; end
+ 6'b010001 : begin data_collision_a_b <= 2'b10; display_ra_wb; end
+// 6'b010101 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+ 6'b011001 : begin data_collision_a_b <= 2'b10; display_ra_wb; end
+ 6'b100001 : begin data_collision_a_b <= 2'b10; display_ra_wb; end
+// 6'b100101 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+ 6'b101001 : begin data_collision_a_b <= 2'b10; display_ra_wb; end
+ 6'b000010 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+ 6'b000110 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+ 6'b001010 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+// 6'b010010 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+// 6'b010110 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+// 6'b011010 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+ 6'b100010 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+ 6'b100110 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+ 6'b101010 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+ endcase
+ end
+ end
+ setup_all_a_b <= 0;
+ end
+
+
+ always @(posedge setup_all_b_a) begin
+ if (data_addra_int[14:1] == data_addrb_reg[14:1]) begin
+ if ((ena_int == 1) && (enb_reg == 1)) begin
+ case ({wr_mode_a, wr_mode_b, wea_int, web_reg})
+ 6'b000011 : begin data_collision_b_a <= 2'b11; display_wa_wb; end
+// 6'b000111 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+ 6'b001011 : begin data_collision_b_a <= 2'b10; display_wa_wb; end
+ 6'b010011 : begin data_collision_b_a <= 2'b11; display_wa_wb; end
+// 6'b010111 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+ 6'b011011 : begin data_collision_b_a <= 2'b10; display_wa_wb; end
+ 6'b100011 : begin data_collision_b_a <= 2'b01; display_wa_wb; end
+ 6'b100111 : begin data_collision_b_a <= 2'b01; display_wa_wb; end
+ 6'b101011 : begin display_wa_wb; end
+ 6'b000001 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b000101 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b001001 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b010001 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b010101 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b011001 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b100001 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b100101 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b101001 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+ 6'b000010 : begin data_collision_b_a <= 2'b01; display_wa_rb; end
+ 6'b000110 : begin data_collision_b_a <= 2'b01; display_wa_rb; end
+ 6'b001010 : begin data_collision_b_a <= 2'b01; display_wa_rb; end
+// 6'b010010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b010110 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b011010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+ 6'b100010 : begin data_collision_b_a <= 2'b01; display_wa_rb; end
+ 6'b100110 : begin data_collision_b_a <= 2'b01; display_wa_rb; end
+ 6'b101010 : begin data_collision_b_a <= 2'b01; display_wa_rb; end
+ endcase
+ end
+ end
+ setup_all_b_a <= 0;
+ end
+
+
+ always @(posedge setup_zero) begin
+ if (data_addra_int[14:1] == data_addrb_int[14:1]) begin
+ if ((ena_int == 1) && (enb_int == 1)) begin
+ case ({wr_mode_a, wr_mode_b, wea_int, web_int})
+ 6'b000011 : begin data_collision <= 2'b11; display_wa_wb; end
+ 6'b000111 : begin data_collision <= 2'b11; display_wa_wb; end
+ 6'b001011 : begin data_collision <= 2'b10; display_wa_wb; end
+ 6'b010011 : begin data_collision <= 2'b11; display_wa_wb; end
+ 6'b010111 : begin data_collision <= 2'b11; display_wa_wb; end
+ 6'b011011 : begin data_collision <= 2'b10; display_wa_wb; end
+ 6'b100011 : begin data_collision <= 2'b01; display_wa_wb; end
+ 6'b100111 : begin data_collision <= 2'b01; display_wa_wb; end
+ 6'b101011 : begin display_wa_wb; end
+ 6'b000001 : begin data_collision <= 2'b10; display_ra_wb; end
+// 6'b000101 : begin data_collision <= 2'b00; display_ra_wb; end
+ 6'b001001 : begin data_collision <= 2'b10; display_ra_wb; end
+ 6'b010001 : begin data_collision <= 2'b10; display_ra_wb; end
+// 6'b010101 : begin data_collision <= 2'b00; display_ra_wb; end
+ 6'b011001 : begin data_collision <= 2'b10; display_ra_wb; end
+ 6'b100001 : begin data_collision <= 2'b10; display_ra_wb; end
+// 6'b100101 : begin data_collision <= 2'b00; display_ra_wb; end
+ 6'b101001 : begin data_collision <= 2'b10; display_ra_wb; end
+ 6'b000010 : begin data_collision <= 2'b01; display_wa_rb; end
+ 6'b000110 : begin data_collision <= 2'b01; display_wa_rb; end
+ 6'b001010 : begin data_collision <= 2'b01; display_wa_rb; end
+// 6'b010010 : begin data_collision <= 2'b00; display_wa_rb; end
+// 6'b010110 : begin data_collision <= 2'b00; display_wa_rb; end
+// 6'b011010 : begin data_collision <= 2'b00; display_wa_rb; end
+ 6'b100010 : begin data_collision <= 2'b01; display_wa_rb; end
+ 6'b100110 : begin data_collision <= 2'b01; display_wa_rb; end
+ 6'b101010 : begin data_collision <= 2'b01; display_wa_rb; end
+ endcase
+ end
+ end
+ setup_zero <= 0;
+ end
+
+ task display_ra_wb;
+ begin
+ if (display_flag)
+ $display("Memory Collision Error on RAMB16_S1_S2:%m at simulation time %.3f ns\nA read was performed on address %h (hex) of Port A while a write was requested to the same address on Port B. The write will be successful however the read value on Port A is unknown until the next CLKA cycle.", $time/1000.0, addra_int);
+ end
+ endtask
+
+ task display_wa_rb;
+ begin
+ if (display_flag)
+ $display("Memory Collision Error on RAMB16_S1_S2:%m at simulation time %.3f ns\nA read was performed on address %h (hex) of Port B while a write was requested to the same address on Port A. The write will be successful however the read value on Port B is unknown until the next CLKB cycle.", $time/1000.0, addrb_int);
+ end
+ endtask
+
+ task display_wa_wb;
+ begin
+ if (display_flag)
+ $display("Memory Collision Error on RAMB16_S1_S2:%m at simulation time %.3f ns\nA write was requested to the same address simultaneously at both Port A and Port B of the RAM. The contents written to the RAM at address location %h (hex) of Port A and address location %h (hex) of Port B are unknown.", $time/1000.0, addra_int, addrb_int);
+ end
+ endtask
+
+
+ always @(posedge setup_rf_a_b) begin
+ if (data_addra_reg[14:1] == data_addrb_int[14:1]) begin
+ if ((ena_reg == 1) && (enb_int == 1)) begin
+ case ({wr_mode_a, wr_mode_b, wea_reg, web_int})
+// 6'b000011 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+// 6'b000111 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+// 6'b001011 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+ 6'b010011 : begin data_collision_a_b <= 2'b11; display_wa_wb; end
+ 6'b010111 : begin data_collision_a_b <= 2'b11; display_wa_wb; end
+ 6'b011011 : begin data_collision_a_b <= 2'b10; display_wa_wb; end
+// 6'b100011 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+// 6'b100111 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+// 6'b101011 : begin data_collision_a_b <= 2'b00; display_wa_wb; end
+// 6'b000001 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b000101 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b001001 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b010001 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b010101 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b011001 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b100001 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b100101 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b101001 : begin data_collision_a_b <= 2'b00; display_ra_wb; end
+// 6'b000010 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+// 6'b000110 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+// 6'b001010 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+ 6'b010010 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+ 6'b010110 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+ 6'b011010 : begin data_collision_a_b <= 2'b01; display_wa_rb; end
+// 6'b100010 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+// 6'b100110 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+// 6'b101010 : begin data_collision_a_b <= 2'b00; display_wa_rb; end
+ endcase
+ end
+ end
+ setup_rf_a_b <= 0;
+ end
+
+
+ always @(posedge setup_rf_b_a) begin
+ if (data_addra_int[14:1] == data_addrb_reg[14:1]) begin
+ if ((ena_int == 1) && (enb_reg == 1)) begin
+ case ({wr_mode_a, wr_mode_b, wea_int, web_reg})
+// 6'b000011 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+ 6'b000111 : begin data_collision_b_a <= 2'b11; display_wa_wb; end
+// 6'b001011 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+// 6'b010011 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+ 6'b010111 : begin data_collision_b_a <= 2'b11; display_wa_wb; end
+// 6'b011011 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+// 6'b100011 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+ 6'b100111 : begin data_collision_b_a <= 2'b01; display_wa_wb; end
+// 6'b101011 : begin data_collision_b_a <= 2'b00; display_wa_wb; end
+// 6'b000001 : begin data_collision_b_a <= 2'b00; display_ra_wb; end
+ 6'b000101 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+// 6'b001001 : begin data_collision_b_a <= 2'b00; display_ra_wb; end
+// 6'b010001 : begin data_collision_b_a <= 2'b00; display_ra_wb; end
+ 6'b010101 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+// 6'b011001 : begin data_collision_b_a <= 2'b00; display_ra_wb; end
+// 6'b100001 : begin data_collision_b_a <= 2'b00; display_ra_wb; end
+ 6'b100101 : begin data_collision_b_a <= 2'b10; display_ra_wb; end
+// 6'b101001 : begin data_collision_b_a <= 2'b00; display_ra_wb; end
+// 6'b000010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b000110 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b001010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b010010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b010110 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b011010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b100010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b100110 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+// 6'b101010 : begin data_collision_b_a <= 2'b00; display_wa_rb; end
+ endcase
+ end
+ end
+ setup_rf_b_a <= 0;
+ end
+
+
+ always @(posedge clka_int) begin
+ if ((output_flag || display_flag)) begin
+ addra_reg <= addra_int;
+ ena_reg <= ena_int;
+ ssra_reg <= ssra_int;
+ wea_reg <= wea_int;
+ end
+ end
+
+ always @(posedge clkb_int) begin
+ if ((output_flag || display_flag)) begin
+ addrb_reg <= addrb_int;
+ enb_reg <= enb_int;
+ ssrb_reg <= ssrb_int;
+ web_reg <= web_int;
+ end
+ end
+
+
+ // Data
+ always @(posedge memory_collision) begin
+ if ((output_flag || display_flag)) begin
+ mem[addra_int[13:1]][addra_int[0:0] * 1 +: 1] <= 1'bx;
+ memory_collision <= 0;
+ end
+
+ end
+
+ always @(posedge memory_collision_a_b) begin
+ if ((output_flag || display_flag)) begin
+ mem[addra_reg[13:1]][addra_reg[0:0] * 1 +: 1] <= 1'bx;
+ memory_collision_a_b <= 0;
+ end
+ end
+
+ always @(posedge memory_collision_b_a) begin
+ if ((output_flag || display_flag)) begin
+ mem[addra_int[13:1]][addra_int[0:0] * 1 +: 1] <= 1'bx;
+ memory_collision_b_a <= 0;
+ end
+ end
+
+ always @(posedge data_collision[1]) begin
+ if (ssra_int == 0 && output_flag) begin
+ doa_out <= #100 1'bX;
+ end
+ data_collision[1] <= 0;
+ end
+
+ always @(posedge data_collision[0]) begin
+ if (ssrb_int == 0 && output_flag) begin
+ dob_out[addra_int[0:0] * 1 +: 1] <= #100 1'bX;
+ end
+ data_collision[0] <= 0;
+ end
+
+ always @(posedge data_collision_a_b[1]) begin
+ if (ssra_reg == 0 && output_flag) begin
+ doa_out <= #100 1'bX;
+ end
+ data_collision_a_b[1] <= 0;
+ end
+
+ always @(posedge data_collision_a_b[0]) begin
+ if (ssrb_int == 0 && output_flag) begin
+ dob_out[addra_reg[0:0] * 1 +: 1] <= #100 1'bX;
+ end
+ data_collision_a_b[0] <= 0;
+ end
+
+ always @(posedge data_collision_b_a[1]) begin
+ if (ssra_int == 0 && output_flag) begin
+ doa_out <= #100 1'bX;
+ end
+ data_collision_b_a[1] <= 0;
+ end
+
+ always @(posedge data_collision_b_a[0]) begin
+ if (ssrb_reg == 0 && output_flag) begin
+ dob_out[addra_int[0:0] * 1 +: 1] <= #100 1'bX;
+ end
+ data_collision_b_a[0] <= 0;
+ end
+
+
+ initial begin
+ case (WRITE_MODE_A)
+ "WRITE_FIRST" : wr_mode_a <= 2'b00;
+ "READ_FIRST" : wr_mode_a <= 2'b01;
+ "NO_CHANGE" : wr_mode_a <= 2'b10;
+ default : begin
+ $display("Attribute Syntax Error : The Attribute WRITE_MODE_A on RAMB16_S1_S2 instance %m is set to %s. Legal values for this attribute are WRITE_FIRST, READ_FIRST or NO_CHANGE.", WRITE_MODE_A);
+ $finish;
+ end
+ endcase
+ end
+
+ initial begin
+ case (WRITE_MODE_B)
+ "WRITE_FIRST" : wr_mode_b <= 2'b00;
+ "READ_FIRST" : wr_mode_b <= 2'b01;
+ "NO_CHANGE" : wr_mode_b <= 2'b10;
+ default : begin
+ $display("Attribute Syntax Error : The Attribute WRITE_MODE_B on RAMB16_S1_S2 instance %m is set to %s. Legal values for this attribute are WRITE_FIRST, READ_FIRST or NO_CHANGE.", WRITE_MODE_B);
+ $finish;
+ end
+ endcase
+ end
+
+
+ // Port A
+ always @(posedge clka_int) begin
+
+ if (ena_int == 1'b1) begin
+
+ if (ssra_int == 1'b1) begin
+ {doa_out} <= #100 SRVAL_A;
+ end
+ else begin
+ if (wea_int == 1'b1) begin
+ if (wr_mode_a == 2'b00) begin
+ doa_out <= #100 dia_int;
+ end
+ else if (wr_mode_a == 2'b01) begin
+
+ doa_out <= #100 mem[addra_int[13:1]][addra_int[0:0] * 1 +: 1];
+
+ end
+ end
+ else begin
+
+ doa_out <= #100 mem[addra_int[13:1]][addra_int[0:0] * 1 +: 1];
+
+ end
+ end
+
+ // memory
+ if (wea_int == 1'b1) begin
+ mem[addra_int[13:1]][addra_int[0:0] * 1 +: 1] <= dia_int;
+ end
+
+ end
+ end
+
+
+ // Port B
+ always @(posedge clkb_int) begin
+
+ if (enb_int == 1'b1) begin
+
+ if (ssrb_int == 1'b1) begin
+ {dob_out} <= #100 SRVAL_B;
+ end
+ else begin
+ if (web_int == 1'b1) begin
+ if (wr_mode_b == 2'b00) begin
+ dob_out <= #100 dib_int;
+ end
+ else if (wr_mode_b == 2'b01) begin
+ dob_out <= #100 mem[addrb_int];
+ end
+ end
+ else begin
+ dob_out <= #100 mem[addrb_int];
+ end
+ end
+
+ // memory
+ if (web_int == 1'b1) begin
+ mem[addrb_int] <= dib_int;
+ end
+
+ end
+ end
+
+
+endmodule
+
+`endif
diff --git a/eth/demo/verilog/demo.ucf b/eth/demo/verilog/demo.ucf
new file mode 100644
index 000000000..f3562b46b
--- /dev/null
+++ b/eth/demo/verilog/demo.ucf
@@ -0,0 +1,52 @@
+NET "Reset_n" LOC = "C15"; // PushButton #4
+NET "Clk_100M" LOC = "B15";
+NET "Clk_125M" LOC = "A16"; // GMII only
+
+NET "RS232_TXD" LOC = "A9";
+NET "RS232_RXD" LOC = "F1";
+
+NET "USB_TXD" LOC = "D1";
+NET "USB_RXD" LOC = "A8";
+
+NET "PHY_RESET_n" LOC = "E25";
+
+NET "PHY_RXC" LOC = "B13";
+NET "PHY_RXD<0>" LOC = "D16";
+NET "PHY_RXD<1>" LOC = "C16";
+NET "PHY_RXD<2>" LOC = "D15";
+NET "PHY_RXD<3>" LOC = "D14";
+NET "PHY_RXD<4>" LOC = "E14";
+NET "PHY_RXD<5>" LOC = "F14";
+NET "PHY_RXD<6>" LOC = "F11";
+NET "PHY_RXD<7>" LOC = "F12";
+NET "PHY_RXDV" LOC = "F13";
+NET "PHY_RXER" LOC = "E13";
+
+NET "PHY_GTX_CLK" LOC = "C26"; // GMII only
+NET "PHY_TXC" LOC = "A10";
+NET "PHY_TXD<0>" LOC = "H26";
+NET "PHY_TXD<1>" LOC = "H24";
+NET "PHY_TXD<2>" LOC = "G26";
+NET "PHY_TXD<3>" LOC = "G24";
+NET "PHY_TXD<4>" LOC = "F26";
+NET "PHY_TXD<5>" LOC = "F24";
+NET "PHY_TXD<6>" LOC = "E26";
+NET "PHY_TXD<7>" LOC = "E24";
+NET "PHY_TXEN" LOC = "D26";
+NET "PHY_TXER" LOC = "D24";
+
+NET "PHY_COL" LOC = "B24";
+NET "PHY_CRS" LOC = "D25";
+
+NET "PHY_MDC" LOC = "G25";
+NET "PHY_MDIO" LOC = "H25";
+
+NET "LED<1>" LOC = "D13"; // LED #1-4
+NET "LED<2>" LOC = "D12";
+NET "LED<3>" LOC = "C11";
+NET "LED<4>" LOC = "D11";
+
+NET "Clk_100M" PERIOD = 10.000 ; # 100 MHz
+NET "Clk_125M" PERIOD = 8.000 ; # 125 MHz
+NET "PHY_RXC" PERIOD = 8.000 ; # 125 MHz
+NET "PHY_TXC" PERIOD = 8.000 ; # 125 MHz
diff --git a/eth/demo/verilog/demo.v b/eth/demo/verilog/demo.v
new file mode 100644
index 000000000..649903c9a
--- /dev/null
+++ b/eth/demo/verilog/demo.v
@@ -0,0 +1,378 @@
+module demo(
+ Reset_n,
+ Clk_100M,
+ Clk_125M, // GMII only
+
+ RS232_TXD,
+ RS232_RXD,
+
+ USB_TXD,
+ USB_RXD,
+
+ //--- 10/100/1000BASE-T Ethernet PHY (MII/GMII)
+ PHY_RESET_n,
+
+ PHY_RXC,
+ PHY_RXD,
+ PHY_RXDV,
+ PHY_RXER,
+
+ PHY_GTX_CLK, // GMII only
+ PHY_TXC,
+ PHY_TXD,
+ PHY_TXEN,
+ PHY_TXER,
+
+ PHY_COL,
+ PHY_CRS,
+
+ PHY_MDC,
+ PHY_MDIO,
+
+ // Misc. I/Os
+ LED,
+ Button
+);
+
+ input Reset_n;
+ input Clk_100M;
+ input Clk_125M; // GMII
+
+ output RS232_TXD;
+ input RS232_RXD;
+
+ output USB_TXD;
+ input USB_RXD;
+
+ //--- 10/100/1000BASE-T Ethernet PHY (MII/GMII)
+ output PHY_RESET_n;
+
+ input PHY_RXC;
+ input [7:0] PHY_RXD;
+ input PHY_RXDV;
+ input PHY_RXER;
+
+ output PHY_GTX_CLK; // GMII only
+ input PHY_TXC;
+ output [7:0] PHY_TXD;
+ output PHY_TXEN;
+ output PHY_TXER;
+
+ input PHY_COL;
+ input PHY_CRS;
+
+ output PHY_MDC;
+ inout PHY_MDIO;
+
+ // Misc. I/Os
+ output [1:4] LED;
+
+ input [1:4] Button;
+
+ //-------------------------------------------------------------------------
+ // Local declarations
+ //-------------------------------------------------------------------------
+
+ // Rename to "standard" core clock name
+ wire Clk = Clk_100M;
+
+ reg [27:0] Counter;
+ always @( negedge Reset_n or posedge Clk )
+ if ( ~Reset_n )
+ Counter <= 0;
+ else
+ Counter <= Counter + 1;
+
+ assign LED[1:4] = Counter[27:24];
+
+ //-------------------------------------------------------------------------
+ // Instantiation of sub-modules
+ //-------------------------------------------------------------------------
+
+ //--- UART ----------------------------------------------------------------
+
+ wire UART_RXD;
+ wire UART_TXD;
+ wire UART_RxValid;
+ wire [7:0] UART_RxData;
+ wire UART_TxReady;
+ wire UART_TxValid;
+ wire [7:0] UART_TxData;
+
+ demo_uart demo_uart(
+ .Reset_n( Reset_n ),
+ .Clk ( Clk ),
+
+ // Interface to UART PHY
+ .RXD_i( UART_RXD ),
+ .TXD_o( UART_TXD ),
+
+ // Clk is divided by (Prescaler+1) to generate 16x the bitrate
+`ifdef EHDL_SIMULATION
+ .Prescaler_i( 16'd3 ), // Corresponds to VERY FAST - for simulation only!
+`else
+ .Prescaler_i( 16'd650 ), // Corresponds to 9600 baud (assuming 100 MHz clock)
+`endif
+
+ // Pulsed when RxData is valid
+ .RxValid_o( UART_RxValid ),
+ .RxData_o ( UART_RxData ),
+
+ // Asserted when ready for a new Tx byte
+ .TxReady_o( UART_TxReady ),
+
+ // Pulsed when TxData is valid
+ .TxValid_i( UART_TxValid ),
+ .TxData_i ( UART_TxData )
+ );
+
+ // Transmit & receive in parallel on either RS232 or USB/RS232 interface
+// assign UART_RXD = RS232_RXD & USB_RXD; // RS232 signals are high when inactive
+ assign UART_RXD = RS232_RXD;
+
+ assign RS232_TXD = UART_TXD;
+ assign USB_TXD = UART_TXD;
+
+ //--- UART-to-Wishbone Master ---------------------------------------------
+
+ wire WB_STB_ETH;
+ wire WB_STB_PDM;
+ wire WB_STB_PG;
+ wire WB_CYC;
+ wire [14:0] WB_ADR;
+ wire WB_WE;
+ wire [15:0] WB_DAT_Wr;
+ wire [15:0] WB_DAT_Rd;
+ wire WB_ACK;
+
+ demo_wishbone_master demo_wishbone_master(
+ .Reset_n( Reset_n ),
+ .Clk ( Clk ),
+
+ //--- UART interface
+
+ // Pulsed when RxData_i is valid
+ .RxValid_i( UART_RxValid ),
+ .RxData_i ( UART_RxData ),
+
+ // Asserted when ready for a new Tx byte
+ .TxReady_i( UART_TxReady ),
+
+ // Pulsed when TxData_o is valid
+ .TxValid_o( UART_TxValid ),
+ .TxData_o ( UART_TxData ),
+
+ //--- Wishbone interface
+ .STB_ETH_O( WB_STB_ETH ),
+ .STB_PDM_O( WB_STB_PDM ),
+ .STB_PG_O ( WB_STB_PG ),
+ .CYC_O ( WB_CYC ),
+ .ADR_O ( WB_ADR ),
+ .WE_O ( WB_WE ),
+ .DAT_O ( WB_DAT_Wr ),
+ .DAT_I ( WB_DAT_Rd ),
+ .ACK_I ( WB_ACK )
+ );
+
+ //--- Wishbone clients ----------------------------------------------------
+
+ //--- Packet Descriptor Memory --------------------------------------------
+
+ wire [15:0] WB_DAT_Rd_PDM;
+ wire WB_ACK_PDM;
+
+ wire PDM_Rd;
+ wire [13:0] PDM_Addr;
+ wire [31:0] PDM_RdData;
+
+ demo_packet_descriptor_memory demo_packet_descriptor_memory(
+ .Reset_n( Reset_n ),
+ .Clk ( Clk ),
+
+ //--- Wishbone interface
+ .STB_I( WB_STB_PDM ),
+ .CYC_I( WB_CYC ),
+ .ADR_I( WB_ADR ),
+ .WE_I ( WB_WE ),
+ .DAT_I( WB_DAT_Wr ),
+ .DAT_O( WB_DAT_Rd_PDM ),
+ .ACK_O( WB_ACK_PDM ),
+
+ //--- Packet Generator interface
+ // RdData_o is always valid exactly one clock after Addr_i changes
+ // and Rd_i is asserted
+ .Rd_i ( PDM_Rd ),
+ .Addr_i ( PDM_Addr ),
+ .RdData_o( PDM_RdData )
+ );
+
+ //--- Packet Generator ----------------------------------------------------
+
+ wire [15:0] WB_DAT_Rd_PG;
+ wire WB_ACK_PG;
+
+ wire Rx_mac_ra;
+ wire Rx_mac_rd;
+ wire [31:0] Rx_mac_data;
+ wire [1:0] Rx_mac_BE;
+ wire Rx_mac_pa;
+ wire Rx_mac_sop;
+ wire Rx_mac_err;
+ wire Rx_mac_eop;
+
+ wire Tx_mac_wa;
+ wire Tx_mac_wr;
+ wire [31:0] Tx_mac_data;
+ wire [1:0] Tx_mac_BE;
+ wire Tx_mac_sop;
+ wire Tx_mac_eop;
+
+ demo_packet_generator demo_packet_generator(
+ .Reset_n( Reset_n ),
+ .Clk ( Clk ),
+
+ //--- Wishbone interface
+ .STB_I( WB_STB_PG ),
+ .CYC_I( WB_CYC ),
+ .ADR_I( WB_ADR[1:0] ),
+ .WE_I ( WB_WE ),
+ .DAT_I( WB_DAT_Wr ),
+ .DAT_O( WB_DAT_Rd_PG ),
+ .ACK_O( WB_ACK_PG ),
+
+ //--- Packet Descriptor Memory interface
+ // RdData_i is always valid exactly one clock after Addr_o changes
+ // and Rd_o is asserted
+ .Rd_o ( PDM_Rd ),
+ .Addr_o ( PDM_Addr ),
+ .RdData_i( PDM_RdData ),
+
+ //--- User (packet) interface
+ .Rx_mac_ra ( Rx_mac_ra ),
+ .Rx_mac_rd ( Rx_mac_rd ),
+ .Rx_mac_data( Rx_mac_data ),
+ .Rx_mac_BE ( Rx_mac_BE ),
+ .Rx_mac_pa ( Rx_mac_pa ),
+ .Rx_mac_sop ( Rx_mac_sop ),
+ .Rx_mac_err ( Rx_mac_err ),
+ .Rx_mac_eop ( Rx_mac_eop ),
+
+ .Tx_mac_wa ( Tx_mac_wa ),
+ .Tx_mac_wr ( Tx_mac_wr ),
+ .Tx_mac_data( Tx_mac_data ),
+ .Tx_mac_BE ( Tx_mac_BE ),
+ .Tx_mac_sop ( Tx_mac_sop ),
+ .Tx_mac_eop ( Tx_mac_eop )
+ );
+
+ //--- Simple Wishbone client ----------------------------------------------
+
+ reg [15:0] Reg1;
+ reg [15:0] Reg2;
+
+ reg WB_ACK_Reg;
+ reg [15:0] WB_DAT_Reg;
+
+ always @( negedge Reset_n or posedge Clk )
+ if ( ~Reset_n )
+ begin
+ WB_ACK_Reg <= 0;
+ WB_DAT_Reg <= 'b0;
+
+ Reg1 <= 16'h1234;
+ Reg2 <= 16'hABCD;
+ end
+ else
+ begin
+ WB_ACK_Reg <= 0;
+ if ( WB_CYC & ~( WB_STB_ETH | WB_STB_PG | WB_STB_PDM ) )
+ begin
+ WB_ACK_Reg <= 1;
+ if ( WB_WE )
+ begin
+ if ( WB_ADR[0] )
+ Reg2 <= WB_DAT_Wr;
+ else
+ Reg1 <= WB_DAT_Wr;
+ end
+ else
+ begin
+ if ( WB_ADR[0] )
+ WB_DAT_Reg <= Reg2;
+ else
+ WB_DAT_Reg <= Reg1;
+ end
+ end
+ end
+
+ //--- DUT - Ethernet Core -------------------------------------------------
+
+ wire [15:0] WB_DAT_Rd_ETH;
+ wire WB_ACK_ETH;
+
+ wire [2:0] Speed;
+
+ MAC_top dut(
+ // System signals
+ .Clk_125M( Clk_125M ),
+ .Clk_user( Clk ),
+ .Speed ( Speed ),
+
+ // Wishbone compliant core host interface
+ .RST_I( ~Reset_n ),
+ .CLK_I( Clk ),
+ .STB_I( WB_STB_ETH ),
+ .CYC_I( WB_CYC ),
+ .ADR_I( WB_ADR[6:0] ),
+ .WE_I ( WB_WE ),
+ .DAT_I( WB_DAT_Wr ),
+ .DAT_O( WB_DAT_Rd_ETH ),
+ .ACK_O( WB_ACK_ETH ),
+
+ // User (packet) interface
+ .Rx_mac_ra ( Rx_mac_ra ),
+ .Rx_mac_rd ( Rx_mac_rd ),
+ .Rx_mac_data( Rx_mac_data ),
+ .Rx_mac_BE ( Rx_mac_BE ),
+ .Rx_mac_pa ( Rx_mac_pa ),
+ .Rx_mac_sop ( Rx_mac_sop ),
+ .Rx_mac_err ( Rx_mac_err ),
+ .Rx_mac_eop ( Rx_mac_eop ),
+
+ .Tx_mac_wa ( Tx_mac_wa ),
+ .Tx_mac_wr ( Tx_mac_wr ),
+ .Tx_mac_data( Tx_mac_data ),
+ .Tx_mac_BE ( Tx_mac_BE ),
+ .Tx_mac_sop ( Tx_mac_sop ),
+ .Tx_mac_eop ( Tx_mac_eop ),
+
+ // PHY interface (GMII/MII)
+ .Gtx_clk( PHY_GTX_CLK ), // Used only in GMII mode
+ .Rx_clk ( PHY_RXC ),
+ .Tx_clk ( PHY_TXC ), // Used only in MII mode
+ .Tx_er ( PHY_TXER ),
+ .Tx_en ( PHY_TXEN ),
+ .Txd ( PHY_TXD ),
+ .Rx_er ( PHY_RXER ),
+ .Rx_dv ( PHY_RXDV ),
+ .Rxd ( PHY_RXD ),
+ .Crs ( PHY_CRS ),
+ .Col ( PHY_COL ),
+
+ // MDIO interface (to PHY)
+ .Mdio( PHY_MDIO ),
+ .Mdc ( PHY_MDC )
+ );
+
+ //--- Combination of Wishbone read data and acknowledge -------------------
+
+ assign WB_DAT_Rd = ({16{WB_ACK_Reg}} & WB_DAT_Reg ) |
+ ({16{WB_ACK_PDM}} & WB_DAT_Rd_PDM) |
+ ({16{WB_ACK_PG }} & WB_DAT_Rd_PG ) |
+ ({16{WB_ACK_ETH}} & WB_DAT_Rd_ETH);
+
+ assign WB_ACK = WB_ACK_Reg | WB_ACK_PDM | WB_ACK_PG | WB_ACK_ETH;
+
+ assign PHY_RESET_n = Reset_n;
+
+endmodule
diff --git a/eth/demo/verilog/demo_packet_descriptor_memory.v b/eth/demo/verilog/demo_packet_descriptor_memory.v
new file mode 100644
index 000000000..a5588a7d1
--- /dev/null
+++ b/eth/demo/verilog/demo_packet_descriptor_memory.v
@@ -0,0 +1,384 @@
+module demo_packet_descriptor_memory(
+ Reset_n,
+ Clk,
+
+ //--- Wishbone interface
+ STB_I,
+ CYC_I,
+ ADR_I,
+ WE_I,
+ DAT_I,
+ DAT_O,
+ ACK_O,
+
+ //--- Packet Generator interface
+ // RdData_o is always valid exactly one clock after Addr_i changes
+ // and Rd_i is asserted
+ Rd_i,
+ Addr_i,
+ RdData_o
+);
+
+ input Reset_n;
+ input Clk;
+
+ //--- Wishbone interface
+ input STB_I;
+ input CYC_I;
+ input [14:0] ADR_I;
+ input WE_I;
+ input [15:0] DAT_I;
+ output [15:0] DAT_O;
+ output ACK_O;
+
+ //--- Packet Generator interface
+ // RdData_o is always valid exactly one clock after Addr_i changes
+ // and Rd_i is asserted
+ input Rd_i;
+ input [13:0] Addr_i;
+ output [31:0] RdData_o;
+
+ //-------------------------------------------------------------------------
+ // Local declarations
+ //-------------------------------------------------------------------------
+
+ reg ACK_O;
+
+ //-------------------------------------------------------------------------
+
+ wire [15:0] WrDataA = DAT_I;
+ wire [15:0] RdDataA;
+ wire [31:0] RdDataB;
+
+ assign DAT_O = RdDataA;
+ assign RdData_o = RdDataB;
+
+ wire WB_Access = STB_I & CYC_I;
+ wire WB_AccessClock1;
+ reg WB_AccessClock2;
+
+ assign WB_AccessClock1 = WB_Access & ~WB_AccessClock2;
+
+ always @( negedge Reset_n or posedge Clk )
+ if ( ~Reset_n )
+ begin
+ WB_AccessClock2 <= 0;
+ ACK_O <= 0;
+ end
+ else
+ begin
+ WB_AccessClock2 <= WB_Access;
+ ACK_O <= WB_AccessClock1;
+ end
+
+ //-------------------------------------------------------------------------
+ // Instantiation of sub-modules
+ //-------------------------------------------------------------------------
+
+ //--- Instantiation of Xilinx 16 Kbit Dual Port Memory --------------------
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit0 (
+ .DOA( RdDataA[0] ),
+ .DOB( { RdDataB[0], RdDataB[16+0] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[0] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit1 (
+ .DOA( RdDataA[1] ),
+ .DOB( { RdDataB[1], RdDataB[16+1] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[1] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit2 (
+ .DOA( RdDataA[2] ),
+ .DOB( { RdDataB[2], RdDataB[16+2] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[2] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit3 (
+ .DOA( RdDataA[3] ),
+ .DOB( { RdDataB[3], RdDataB[16+3] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[3] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit4 (
+ .DOA( RdDataA[4] ),
+ .DOB( { RdDataB[4], RdDataB[16+4] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[4] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit5 (
+ .DOA( RdDataA[5] ),
+ .DOB( { RdDataB[5], RdDataB[16+5] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[5] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit6 (
+ .DOA( RdDataA[6] ),
+ .DOB( { RdDataB[6], RdDataB[16+6] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[6] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit7 (
+ .DOA( RdDataA[7] ),
+ .DOB( { RdDataB[7], RdDataB[16+7] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[7] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit8 (
+ .DOA( RdDataA[8] ),
+ .DOB( { RdDataB[8], RdDataB[16+8] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[8] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit9 (
+ .DOA( RdDataA[9] ),
+ .DOB( { RdDataB[9], RdDataB[16+9] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[9] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit10 (
+ .DOA( RdDataA[10] ),
+ .DOB( { RdDataB[10], RdDataB[16+10] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[10] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit11 (
+ .DOA( RdDataA[11] ),
+ .DOB( { RdDataB[11], RdDataB[16+11] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[11] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit12 (
+ .DOA( RdDataA[12] ),
+ .DOB( { RdDataB[12], RdDataB[16+12] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[12] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit13 (
+ .DOA( RdDataA[13] ),
+ .DOB( { RdDataB[13], RdDataB[16+13] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[13] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit14 (
+ .DOA( RdDataA[14] ),
+ .DOB( { RdDataB[14], RdDataB[16+14] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[14] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+ RAMB16_S1_S2 RAMB16_S1_S2_bit15 (
+ .DOA( RdDataA[15] ),
+ .DOB( { RdDataB[15], RdDataB[16+15] } ),
+
+ .ADDRA( ADR_I[13:0] ),
+ .DIA ( WrDataA[15] ),
+ .ENA ( WB_AccessClock1 ),
+ .CLKA ( Clk ),
+ .WEA ( WE_I ),
+ .SSRA ( 1'b0 ),
+
+ .ADDRB( Addr_i[12:0] ),
+ .DIB ( 2'b00 ),
+ .ENB ( Rd_i ),
+ .CLKB ( Clk ),
+ .WEB ( 1'b0 ),
+ .SSRB ( 1'b0 )
+ );
+
+endmodule
diff --git a/eth/demo/verilog/demo_packet_generator.v b/eth/demo/verilog/demo_packet_generator.v
new file mode 100644
index 000000000..22ad52b4c
--- /dev/null
+++ b/eth/demo/verilog/demo_packet_generator.v
@@ -0,0 +1,274 @@
+module demo_packet_generator(
+ Reset_n,
+ Clk,
+
+ //--- Wishbone interface
+ STB_I,
+ CYC_I,
+ ADR_I,
+ WE_I,
+ DAT_I,
+ DAT_O,
+ ACK_O,
+
+ //--- Packet Descriptor Memory interface
+ // RdData_i is always valid exactly one clock after Addr_o changes
+ // and Rd_o is asserted
+ Rd_o,
+ Addr_o,
+ RdData_i,
+
+ //--- User (packet) interface
+ Rx_mac_ra,
+ Rx_mac_rd,
+ Rx_mac_data,
+ Rx_mac_BE,
+ Rx_mac_pa,
+ Rx_mac_sop,
+ Rx_mac_err,
+ Rx_mac_eop,
+
+ Tx_mac_wa,
+ Tx_mac_wr,
+ Tx_mac_data,
+ Tx_mac_BE,
+ Tx_mac_sop,
+ Tx_mac_eop
+);
+
+ input Reset_n;
+ input Clk;
+
+ //--- Wishbone interface
+ input STB_I;
+ input CYC_I;
+ input [1:0] ADR_I;
+ input WE_I;
+ input [15:0] DAT_I;
+ output [15:0] DAT_O;
+ output ACK_O;
+
+ //--- Packet Generator interface
+ // RdData_o is always valid exactly one clock after Addr_o changes
+ // and Rd_o is asserted
+ output Rd_o;
+ output [13:0] Addr_o;
+ input [31:0] RdData_i;
+
+ //--- User (packet) interface
+ input Rx_mac_ra;
+ output Rx_mac_rd;
+ input [31:0] Rx_mac_data;
+ input [1:0] Rx_mac_BE;
+ input Rx_mac_pa;
+ input Rx_mac_sop;
+ input Rx_mac_err;
+ input Rx_mac_eop;
+
+ input Tx_mac_wa;
+ output Tx_mac_wr;
+ output [31:0] Tx_mac_data;
+ output [1:0] Tx_mac_BE;
+ output Tx_mac_sop;
+ output Tx_mac_eop;
+
+ //-------------------------------------------------------------------------
+ // Local declarations
+ //-------------------------------------------------------------------------
+
+ reg ACK_O;
+ reg [15:0] DAT_O;
+
+ reg Rd_o;
+ reg Tx_mac_wr;
+ reg [1:0] Tx_mac_BE;
+ reg Tx_mac_sop;
+ reg Tx_mac_eop;
+
+ //--- Wishbone interface --------------------------------------------------
+
+ reg [1:0] PG_CFG;
+ wire PG_Enable = PG_CFG[0];
+
+ always @( negedge Reset_n or posedge Clk )
+ if ( ~Reset_n )
+ begin
+ ACK_O <= 0;
+ DAT_O <= 'b0;
+
+ PG_CFG <= 2'h0;
+ end
+ else
+ begin
+ ACK_O <= 0;
+ if ( CYC_I & STB_I )
+ begin
+ ACK_O <= ~ACK_O; // Generate single cycle pulse!
+ if ( WE_I )
+ begin
+ PG_CFG <= DAT_I;
+ end
+ else
+ begin
+ DAT_O[1:0] <= PG_CFG;
+ end
+ end
+ end
+
+ //--- Packet Generator FSM ------------------------------------------------
+
+ parameter PG_FSM_STATE_IDLE = 3'h0;
+ parameter PG_FSM_STATE_LD_DESC_1 = 3'h1;
+ parameter PG_FSM_STATE_LD_DESC_2 = 3'h2;
+ parameter PG_FSM_STATE_RD_HEADER = 3'h3;
+ parameter PG_FSM_STATE_PAYLOAD_SEQ_NUMBER = 3'h4;
+ parameter PG_FSM_STATE_PAYLOAD = 3'h5;
+ parameter PG_FSM_STATE_DONE = 3'h6;
+ reg [2:0] PG_FSM_State;
+
+ reg [9:0] DescHigh; // Selects currente descriptor
+ reg [3:0] DescLow; // Index into a single descriptor (16 entries)
+
+ reg PDM_CFG1_LAST;
+ reg [3:0] PDM_CFG1_REPEAT;
+ reg [3:0] PDM_CFG1_HDRLEN;
+ reg [15:0] PDM_CFG2_PAYLDLEN;
+
+ reg [31:0] Tx_mac_data_reg;
+ reg WriteHeader;
+ reg [15:0] PayloadRemaining;
+ reg [31:0] PacketSequenceNumber;
+ reg [31:0] Payload;
+
+ always @( negedge Reset_n or posedge Clk )
+ if ( ~Reset_n )
+ begin
+ PG_FSM_State <= PG_FSM_STATE_IDLE;
+
+ Rd_o <= 0;
+
+ DescHigh <= 10'b0;
+ DescLow <= 4'b0;
+
+ Tx_mac_wr <= 0;
+ Tx_mac_sop <= 0;
+ Tx_mac_eop <= 0;
+ Tx_mac_BE <= 2'b00;
+
+ Tx_mac_data_reg <= 32'b0;
+ WriteHeader <= 0;
+ PayloadRemaining <= 16'd0;
+
+ PacketSequenceNumber <= 32'd0;
+ Payload <= 32'h0;
+
+ { PDM_CFG1_HDRLEN, PDM_CFG1_REPEAT, PDM_CFG1_LAST, PDM_CFG2_PAYLDLEN } <= 'b0;
+ end
+ else
+ begin
+ casez ( PG_FSM_State )
+ PG_FSM_STATE_IDLE:
+ if ( PG_Enable )
+ begin
+ PG_FSM_State <= PG_FSM_STATE_LD_DESC_1;
+ Rd_o <= 1;
+ end
+ else
+ begin
+ DescHigh <= 10'b0;
+ DescLow <= 4'b0;
+ end
+
+ PG_FSM_STATE_LD_DESC_1:
+ begin
+ PG_FSM_State <= PG_FSM_STATE_LD_DESC_2;
+
+ DescLow <= DescLow + 1;
+ end
+
+ PG_FSM_STATE_LD_DESC_2:
+ begin
+ PG_FSM_State <= PG_FSM_STATE_RD_HEADER;
+
+ { PDM_CFG1_LAST, PDM_CFG1_REPEAT, PDM_CFG1_HDRLEN, PDM_CFG2_PAYLDLEN } <=
+ { RdData_i[31], RdData_i[23:20], RdData_i[19:16], RdData_i[15:0] };
+ end
+
+ PG_FSM_STATE_RD_HEADER:
+ begin
+ Tx_mac_wr <= 0;
+ if ( Tx_mac_wa )
+ begin
+ // Space in Tx FIFO - write next header word
+ DescLow <= DescLow + 1;
+ Tx_mac_wr <= 1;
+ Tx_mac_sop <= ( DescLow == 1 ); // Assert SOP on first header word
+ WriteHeader <= 1;
+ if ( DescLow == PDM_CFG1_HDRLEN )
+ begin
+ // The requested number of header words has been read
+ // - proceed to generate packet payload
+ PG_FSM_State <= PG_FSM_STATE_PAYLOAD_SEQ_NUMBER;
+ PayloadRemaining <= PDM_CFG2_PAYLDLEN;
+ end
+ end
+ end
+
+ PG_FSM_STATE_PAYLOAD_SEQ_NUMBER:
+ begin
+ WriteHeader <= 0;
+ Tx_mac_data_reg <= PacketSequenceNumber;
+ Tx_mac_wr <= 0;
+ Tx_mac_sop <= 0;
+ if ( Tx_mac_wa )
+ begin
+ Tx_mac_wr <= 1;
+ PG_FSM_State <= PG_FSM_STATE_PAYLOAD;
+ Payload <= 32'h01020304;
+ PayloadRemaining <= PayloadRemaining - 4;
+ end
+ end
+
+ PG_FSM_STATE_PAYLOAD:
+ begin
+ Tx_mac_data_reg <= Payload;
+ Tx_mac_wr <= 0;
+ if ( Tx_mac_wa )
+ begin
+ Tx_mac_wr <= 1;
+ Tx_mac_data_reg <= Payload;
+ Payload[31:24] <= Payload[31:24] + 8'h04;
+ Payload[23:16] <= Payload[23:16] + 8'h04;
+ Payload[15: 8] <= Payload[15: 8] + 8'h04;
+ Payload[ 7: 0] <= Payload[ 7: 0] + 8'h04;
+ PayloadRemaining <= PayloadRemaining - 4;
+ if ( PayloadRemaining <= 4 )
+ begin
+ PG_FSM_State <= PG_FSM_STATE_DONE;
+
+ Tx_mac_eop <= 1;
+ // Indicate how many bytes are valid in this last transfer
+ Tx_mac_BE <= PayloadRemaining[1:0];
+ end
+ end
+ end
+
+ PG_FSM_STATE_DONE:
+ begin
+ // TBD: Add support for REPEAT, NEXT & LAST!
+ Tx_mac_wr <= 0;
+ Tx_mac_eop <= 0;
+ end
+ endcase
+ end
+
+ //-------------------------------------------------------------------------
+
+ assign Tx_mac_data = WriteHeader ?
+ RdData_i : Tx_mac_data_reg;
+
+ assign Addr_o = { DescHigh, DescLow };
+
+ assign Rx_mac_rd = 0;
+
+endmodule
diff --git a/eth/demo/verilog/demo_uart.v b/eth/demo/verilog/demo_uart.v
new file mode 100644
index 000000000..ba4a3c35c
--- /dev/null
+++ b/eth/demo/verilog/demo_uart.v
@@ -0,0 +1,235 @@
+module demo_uart(
+ Reset_n,
+ Clk,
+
+ // Interface to UART PHY (RS232 level converter)
+ RXD_i,
+ TXD_o,
+
+ // Clk is divided by (Prescaler+1) to generate 16x the bitrate
+ Prescaler_i,
+
+ // Pulsed when RxData is valid
+ RxValid_o,
+ RxData_o,
+
+ // Asserted when ready for a new Tx byte
+ TxReady_o,
+
+ // Pulsed when TxData is valid
+ TxValid_i,
+ TxData_i
+);
+
+ input Reset_n;
+ input Clk;
+
+ // Interface to UART PHY (RS232 level converter)
+ input RXD_i;
+ output TXD_o;
+
+ // Clk is divided by (Prescaler+1) to generate 16x the bitrate
+ input [15:0] Prescaler_i;
+
+ // Pulsed when RxData is valid
+ output RxValid_o;
+ output [7:0] RxData_o;
+
+ // Asserted when ready for a new Tx byte
+ output TxReady_o;
+
+ // Pulsed when TxData is valid
+ input TxValid_i;
+ input [7:0] TxData_i;
+
+ //-------------------------------------------------------------------------
+ // Local declarations
+ //-------------------------------------------------------------------------
+
+ reg TXD_o;
+ reg RxValid_o;
+ reg [7:0] RxData_o;
+ reg TxReady_o;
+
+ //-------------------------------------------------------------------------
+ // Instantiation of sub-modules
+ //-------------------------------------------------------------------------
+
+ //--- Prescaler generating 16x bitrate clock ------------------------------
+
+ reg Clk_16x;
+ reg [15:0] Prescaler;
+
+ always @( negedge Reset_n or posedge Clk )
+ if ( ~Reset_n )
+ begin
+ Prescaler <= 0;
+ Clk_16x <= 0;
+ end
+ else
+ begin
+ if ( Prescaler == Prescaler_i )
+ begin
+ Prescaler <= 0;
+ Clk_16x <= 1;
+ end
+ else
+ begin
+ Prescaler <= Prescaler + 1;
+ Clk_16x <= 0;
+ end
+ end
+
+ //--- Transmitter logic ---------------------------------------------------
+
+ reg [3:0] TxCounter;
+ reg TxSendBit;
+
+ always @( negedge Reset_n or posedge Clk )
+ if ( ~Reset_n )
+ begin
+ TxCounter <= 0;
+ TxSendBit <= 0;
+ end
+ else
+ begin
+ TxSendBit <= 0;
+ if ( Clk_16x )
+ begin
+ if ( TxCounter == 15 )
+ begin
+ TxCounter <= 0;
+ TxSendBit <= 1;
+ end
+ else
+ TxCounter <= TxCounter + 1;
+ end
+ end
+
+ reg [7:0] TxData_reg;
+ reg [3:0] TxBitCnt;
+ always @( negedge Reset_n or posedge Clk )
+ if ( ~Reset_n )
+ begin
+ TXD_o <= 1;
+ TxReady_o <= 1;
+ TxData_reg <= 0;
+ TxBitCnt <= 0;
+ end
+ else
+ begin
+ if ( TxReady_o )
+ begin
+ if ( TxValid_i )
+ begin
+ TxReady_o <= 0;
+ TxData_reg <= TxData_i;
+ TxBitCnt <= 0;
+ end
+ end
+ else
+ begin
+ if ( TxSendBit )
+ begin
+ // Only do anything on bit boundaries
+ casez ( TxBitCnt )
+ 0: // Tx START bit
+ TXD_o <= 0;
+ 10: // Tx second STOP bit
+ // Now we're done
+ TxReady_o <= 1;
+ default: // Tx data bit + first stop bit
+ begin
+ TXD_o <= TxData_reg[0];
+ TxData_reg <= { 1'b1, TxData_reg[7:1] };
+ end
+ endcase
+
+ TxBitCnt <= TxBitCnt+1;
+ end
+ end
+ end
+
+ //--- Receiver logic ------------------------------------------------------
+
+ reg RxHunt;
+ reg [3:0] RxCounter;
+ reg RxSampleBit;
+ reg RxDone;
+
+ always @( negedge Reset_n or posedge Clk )
+ if ( ~Reset_n )
+ begin
+ RxCounter <= 0;
+ RxSampleBit <= 0;
+
+ RxHunt <= 1;
+ end
+ else
+ begin
+ RxSampleBit <= 0;
+
+ if ( RxDone )
+ RxHunt <= 1;
+
+ if ( Clk_16x )
+ begin
+ if ( RxHunt )
+ begin
+ if ( RXD_i == 0 )
+ begin
+ // Receiving start bit!
+ RxHunt <= 0;
+ // Reset 16x bit counter
+ RxCounter <= 0;
+ end
+ end
+ else
+ begin
+ RxCounter <= RxCounter + 1;
+ if ( RxCounter == 7 )
+ // In middle of Rx bit in next cycle
+ RxSampleBit <= 1;
+ end
+ end
+ end
+
+ reg [3:0] RxBitCount;
+
+ always @( negedge Reset_n or posedge Clk )
+ if ( ~Reset_n )
+ begin
+ RxValid_o <= 0;
+ RxData_o <= 'b0;
+ RxBitCount <= 0;
+ RxDone <= 0;
+ end
+ else
+ begin
+ RxValid_o <= 0;
+ RxDone <= 0;
+
+ if ( RxSampleBit )
+ begin
+ RxBitCount <= RxBitCount + 1;
+
+ casez ( RxBitCount )
+ 0: // START bit - just ignore it
+ ;
+ 9: // STOP bit - indicate we're ready again
+ begin
+ RxDone <= 1;
+ RxBitCount <= 0;
+ end
+ default: // Rx Data bits
+ begin
+ RxData_o <= { RXD_i, RxData_o[7:1] };
+ if ( RxBitCount == 8 )
+ // Last data bit just received
+ RxValid_o <= 1;
+ end
+ endcase
+ end
+ end
+
+endmodule
diff --git a/eth/demo/verilog/demo_wishbone_master.v b/eth/demo/verilog/demo_wishbone_master.v
new file mode 100644
index 000000000..b3c64fbcf
--- /dev/null
+++ b/eth/demo/verilog/demo_wishbone_master.v
@@ -0,0 +1,376 @@
+module demo_wishbone_master(
+ Reset_n,
+ Clk,
+
+ //--- UART interface
+
+ // Pulsed when RxData_i is valid
+ RxValid_i,
+ RxData_i,
+
+ // Asserted when ready for a new Tx byte
+ TxReady_i,
+
+ // Pulsed when TxData_o is valid
+ TxValid_o,
+ TxData_o,
+
+ //--- Wishbone interface
+ STB_ETH_O,
+ STB_PDM_O,
+ STB_PG_O,
+ CYC_O,
+ ADR_O,
+ WE_O,
+ DAT_O,
+ DAT_I,
+ ACK_I
+);
+
+ input Reset_n;
+ input Clk;
+
+ //--- UART interface
+
+ // Pulsed when RxData_i is valid
+ input RxValid_i;
+ input [7:0] RxData_i;
+
+ // Asserted when ready for a new Tx byte
+ input TxReady_i;
+
+ // Pulsed when TxData_o is valid
+ output TxValid_o;
+ output [7:0] TxData_o;
+
+ output STB_ETH_O;
+ output STB_PDM_O;
+ output STB_PG_O;
+ output CYC_O;
+ output [14:0] ADR_O;
+ output WE_O;
+ output [15:0] DAT_O;
+ input [15:0] DAT_I;
+ input ACK_I;
+
+ //-------------------------------------------------------------------------
+ // Local declarations
+ //-------------------------------------------------------------------------
+
+ reg TxValid_o;
+ reg [7:0] TxData_o;
+ reg STB_ETH_O;
+ reg STB_PDM_O;
+ reg STB_PG_O;
+ reg CYC_O;
+ reg [14:0] ADR_O;
+ reg WE_O;
+ reg [15:0] DAT_O;
+
+ //-------------------------------------------------------------------------
+ // Instantiation of sub-modules
+ //-------------------------------------------------------------------------
+
+ //--- Transmit FSM --------------------------------------------------------
+
+ parameter TX_STATE_IDLE = 0;
+ parameter TX_STATE_INIT = 1;
+ parameter TX_STATE_OK = 2;
+ parameter TX_STATE_ERROR = 3;
+ parameter TX_STATE_VALUE = 4;
+ parameter TX_STATE_LF = 5;
+
+ reg [2:0] TxState;
+ reg [3:0] TxIndex;
+ reg TxLast;
+
+ wire [15:0] TxValue16;
+ wire [3:0] TxHexDigit;
+ wire [7:0] TxHexChar;
+ reg TxOK;
+ reg TxERROR;
+ reg TxValue;
+
+ always @( negedge Reset_n or posedge Clk )
+ if ( ~Reset_n )
+ begin
+ TxState <= TX_STATE_INIT;
+ TxIndex <= 0;
+ TxLast <= 0;
+
+ TxValid_o <= 0;
+ TxData_o <= 'b0;
+ end
+ else
+ begin
+ TxValid_o <= 0;
+
+ // Don't do anything in cycle following TxValid_o being pulsed
+ if ( ~TxValid_o )
+ begin
+ casez ( TxState )
+ TX_STATE_INIT:
+ casez ( TxIndex )
+ 0: TxData_o <= "R";
+ 1: TxData_o <= "E";
+ 2: TxData_o <= "A";
+ 3: TxData_o <= "D";
+ 4: TxData_o <= "Y";
+ default: TxLast <= 1;
+ endcase
+
+ TX_STATE_OK:
+ casez ( TxIndex )
+ 0: TxData_o <= "O";
+ 1: TxData_o <= "K";
+ default: TxLast <= 1;
+ endcase
+
+ TX_STATE_ERROR:
+ casez ( TxIndex )
+ 0: TxData_o <= "E";
+ 1: TxData_o <= "R";
+ 2: TxData_o <= "R";
+ 3: TxData_o <= "O";
+ 4: TxData_o <= "R";
+ default: TxLast <= 1;
+ endcase
+
+ TX_STATE_VALUE:
+ casez ( TxIndex )
+ 0,1,2,3: TxData_o <= TxHexChar;
+ default: TxLast <= 1;
+ endcase
+
+ TX_STATE_LF:
+ ;
+
+ default:
+ begin
+ if ( TxOK )
+ TxState <= TX_STATE_OK;
+ else if ( TxERROR )
+ TxState <= TX_STATE_ERROR;
+ else if ( TxValue )
+ begin
+ TxState <= TX_STATE_VALUE;
+ TxIndex <= 0;
+ end
+ end
+ endcase
+
+ if ( (TxState != TX_STATE_IDLE) & TxReady_i )
+ begin
+ TxValid_o <= 1;
+
+ if ( TxLast )
+ begin
+ if ( TxState == TX_STATE_LF )
+ begin
+ TxData_o <= 10; // LF
+ TxState <= TX_STATE_IDLE;
+ TxIndex <= 0;
+ TxLast <= 0;
+ end
+ else
+ begin
+ TxData_o <= 13; // CR
+ TxState <= TX_STATE_LF;
+ end
+ end
+ else
+ TxIndex <= TxIndex + 1;
+ end
+ end
+ end
+
+ assign TxHexDigit = (TxIndex==0) ? TxValue16[15:12] :
+ (TxIndex==1) ? TxValue16[11: 8] :
+ (TxIndex==2) ? TxValue16[ 7: 4] :
+ TxValue16[ 3: 0];
+
+ assign TxHexChar = (TxHexDigit <= 9) ? (TxHexDigit + "0") :
+ (TxHexDigit + "A"-'hA);
+
+ //--- Receive FSM ---------------------------------------------------------
+
+ parameter RX_STATE_IDLE = 0;
+ parameter RX_STATE_VALUE16_FIRST = 1;
+ parameter RX_STATE_VALUE16 = 2;
+ parameter RX_STATE_COMMENT = 3;
+ parameter RX_STATE_CMD = 4;
+
+ reg [2:0] RxState;
+
+ wire IsWhiteSpace = ( RxData_i==" " ) |
+ ( RxData_i=="\t" ) |
+ ( RxData_i=="," ) |
+ ( RxData_i==10 ) |
+ ( RxData_i==13 );
+ wire IsHexDigit = (( RxData_i >= "0" ) & ( RxData_i <= "9" )) |
+ (( RxData_i >= "a" ) & ( RxData_i <= "f" )) |
+ (( RxData_i >= "A" ) & ( RxData_i <= "F" ));
+ wire [3:0] RxHexValue =
+ (( RxData_i >= "0" ) & ( RxData_i <= "9" )) ? RxData_i[3:0] :
+ (( RxData_i >= "a" ) & ( RxData_i <= "f" )) ? (RxData_i-"a"+'hA) :
+ (( RxData_i >= "A" ) & ( RxData_i <= "F" )) ? (RxData_i-"A"+'hA) : 0;
+
+ reg [15:0] RxValue16;
+ reg RxWrite;
+ reg RxWrData;
+
+ reg [15:0] RegAddr;
+ reg [15:0] RegRdData;
+
+ assign TxValue16 = RegRdData;
+
+ always @( negedge Reset_n or posedge Clk )
+ if ( ~Reset_n )
+ begin
+ RxState <= RX_STATE_IDLE;
+
+ RxValue16 <= 16'h0;
+ RxWrite <= 0;
+ RxWrData <= 0;
+
+ RegAddr <= 'b0;
+ RegRdData <= 'b0;
+
+ STB_ETH_O <= 0;
+ STB_PDM_O <= 0;
+ STB_PG_O <= 0;
+ CYC_O <= 0;
+ ADR_O <= 0;
+ WE_O <= 0;
+ DAT_O <= 0;
+
+ TxOK <= 0;
+ TxERROR <= 0;
+ TxValue <= 0;
+ end
+ else
+ begin
+ TxOK <= 0;
+ TxERROR <= 0;
+ TxValue <= 0;
+
+ if ( RxState == RX_STATE_CMD )
+ begin
+ STB_ETH_O <= ( RegAddr[15:12] == 4'h0 );
+ STB_PG_O <= ( RegAddr[15:12] == 4'h1 );
+ STB_PDM_O <= ( RegAddr[15] == 1'b1 );
+
+ CYC_O <= 1;
+ ADR_O <= RegAddr[14:0];
+ WE_O <= RxWrite;
+
+ if ( ACK_I )
+ begin
+ // Register transaction is completing!
+ CYC_O <= 0;
+ STB_ETH_O <= 0;
+ STB_PDM_O <= 0;
+ STB_PG_O <= 0;
+
+ // Latch data read in case of a read
+ RegRdData <= DAT_I;
+
+ if ( RxWrite )
+ // Transaction was a register write
+ TxOK <= 1;
+ else
+ TxValue <= 1;
+
+ RxState <= RX_STATE_IDLE;
+ end
+ end
+ else if ( (TxState == TX_STATE_IDLE) & RxValid_i )
+ begin
+ // A byte has been received!
+
+ casez ( RxState )
+ RX_STATE_IDLE:
+ if ( (RxData_i == "w") | (RxData_i == "W") )
+ begin
+ // Write Register Command: W rrrr dddd
+ RxState <= RX_STATE_VALUE16_FIRST;
+ RxWrite <= 1;
+ RxWrData <= 0;
+ end
+ else if ( (RxData_i == "r") | (RxData_i == "R") )
+ begin
+ // Read Register Command: R rrrr
+ RxState <= RX_STATE_VALUE16_FIRST;
+ RxWrite <= 0;
+ end
+ else if ( RxData_i == "/" )
+ begin
+ // Comment!
+ RxState <= RX_STATE_COMMENT;
+ end
+ else if ( ~IsWhiteSpace )
+ // Unknown command!
+ TxERROR <= 1;
+
+ RX_STATE_COMMENT:
+ if ( (RxData_i == 13) | (RxData_i == 10) )
+ // CR or LF - end of comment
+ RxState <= RX_STATE_IDLE;
+
+ RX_STATE_VALUE16_FIRST:
+ if ( IsHexDigit )
+ begin
+ RxValue16 <= { 12'b0, RxHexValue };
+ RxState <= RX_STATE_VALUE16;
+ end
+ else if ( ~IsWhiteSpace )
+ begin
+ // Unexpected character!
+ TxERROR <= 1;
+ RxState <= RX_STATE_IDLE;
+ end
+
+ RX_STATE_VALUE16:
+ if ( IsHexDigit )
+ RxValue16 <= { RxValue16[11:0], RxHexValue };
+ else if ( IsWhiteSpace )
+ begin
+ // Done collecting 16-bit value
+ if ( RxWrite )
+ begin
+ // This is a register write
+ if ( RxWrData )
+ begin
+ // Second time around - just received write data
+ DAT_O <= RxValue16;
+ RxState <= RX_STATE_CMD;
+ end
+ else
+ begin
+ // Just received register address - expecting second argument
+ RegAddr <= RxValue16;
+ RxState <= RX_STATE_VALUE16_FIRST;
+ RxWrData <= 1; // Now receive the write data
+ end
+ end
+ else
+ begin
+ // This is a register read
+ RegAddr <= RxValue16;
+ RxState <= RX_STATE_CMD;
+ end
+ end
+ else
+ begin
+ // Unexpected character!
+ TxERROR <= 1;
+ RxState <= RX_STATE_IDLE;
+ end
+
+ default:
+ TxERROR <= 1;
+ endcase
+ end
+ end
+
+endmodule
diff --git a/eth/demo/verilog/tb_demo.v b/eth/demo/verilog/tb_demo.v
new file mode 100644
index 000000000..c5a8a3f41
--- /dev/null
+++ b/eth/demo/verilog/tb_demo.v
@@ -0,0 +1,348 @@
+`timescale 1ns / 1ns
+
+module tb_demo;
+
+ //-------------------- Instantiate Xilinx glbl module ----------------------
+ // - this is needed to get ModelSim to work because e.g. I/O buffer models
+ // refer directly to glbl.GTS and similar signals
+
+ wire GSR;
+ wire GTS;
+ xlnx_glbl glbl( .GSR( GSR ), .GTS( GTS ) );
+
+ reg VLOG_ExitSignal = 0;
+ reg Done = 0;
+ reg Error = 0;
+
+ //-------------------------------------------------------------------------
+
+ reg Reset_n;
+ reg Clk_100M;
+ reg Clk_125M;
+
+ wire RS232_TXD;
+ wire RS232_RXD;
+
+ wire USB_TXD;
+ wire USB_RXD;
+
+ //--- 10/100/1000BASE-T Ethernet PHY (MII/GMII)
+ wire PHY_RESET_n;
+
+ wire PHY_RXC;
+ wire [7:0] PHY_RXD;
+ wire PHY_RXDV;
+ wire PHY_RXER;
+
+ wire PHY_GTX_CLK; // GMII only
+ wire PHY_TXC;
+ wire [7:0] PHY_TXD;
+ wire PHY_TXEN;
+ wire PHY_TXER;
+
+ wire PHY_COL = 0;
+ wire PHY_CRS = 0;
+
+ wire PHY_MDC;
+ wire PHY_MDIO;
+
+ wire [1:4] LED;
+
+ reg [1:4] Button = 4'b0000;
+
+ //-------------------------------------------------------------------------
+ // Local declarations
+ //-------------------------------------------------------------------------
+
+ //-------------------------------------------------------------------------
+ // Instantiation of sub-modules
+ //-------------------------------------------------------------------------
+
+ //--- DUT
+
+ demo demo(
+ .Reset_n ( Reset_n ),
+ .Clk_100M( Clk_100M ),
+ .Clk_125M( Clk_125M ),
+
+ .RS232_TXD( RS232_TXD ),
+ .RS232_RXD( RS232_RXD ),
+
+ .USB_TXD( USB_TXD ),
+ .USB_RXD( USB_RXD ),
+
+ //--- 10/100/1000BASE-T Ethernet PHY (MII/GMII)
+ .PHY_RESET_n( PHY_RESET_n ),
+
+ .PHY_RXC ( PHY_RXC ),
+ .PHY_RXD ( PHY_RXD ),
+ .PHY_RXDV( PHY_RXDV ),
+ .PHY_RXER( PHY_RXER ),
+
+ .PHY_GTX_CLK( PHY_GTX_CLK ), // GMII only
+ .PHY_TXC ( PHY_TXC ),
+ .PHY_TXD ( PHY_TXD ),
+ .PHY_TXEN ( PHY_TXEN ),
+ .PHY_TXER ( PHY_TXER ),
+
+ .PHY_COL( PHY_COL ),
+ .PHY_CRS( PHY_CRS ),
+
+ .PHY_MDC ( PHY_MDC ),
+ .PHY_MDIO( PHY_MDIO ),
+
+ // Misc. I/Os
+ .LED ( LED ),
+ .Button( Button )
+ );
+
+ //-------------------------------------------------------------------------
+ // MII/GMII Ethernet PHY model
+
+ reg [2:0] Speed = 3'b000;
+
+ Phy_sim U_Phy_sim(
+ .Gtx_clk( PHY_GTX_CLK ),
+ .Rx_clk ( PHY_RXC ),
+ .Tx_clk ( PHY_TXC ),
+ .Tx_er ( PHY_TXER ),
+ .Tx_en ( PHY_TXEN ),
+ .Txd ( PHY_TXD ),
+ .Rx_er ( PHY_RXER ),
+ .Rx_dv ( PHY_RXDV ),
+ .Rxd ( PHY_RXD ),
+ .Crs ( PHY_CRS ),
+ .Col ( PHY_COL ),
+ .Speed ( Speed ),
+ .Done ( Done )
+ );
+
+ //-------------------------------------------------------------------------
+ // Generate all clocks & reset
+ //-------------------------------------------------------------------------
+
+ // Core master clock (100 MHz)
+ initial
+ begin
+ #10;
+ while ( !Done )
+ begin
+ #5 Clk_100M = 0;
+ #5 Clk_100M = 1;
+ end
+ end
+
+ // GMII master clock (125 MHz)
+ initial
+ begin
+ #10;
+ while ( !Done )
+ begin
+ #4 Clk_125M = 0;
+ #4 Clk_125M = 1;
+ end
+ end
+
+ initial
+ begin
+ Reset_n = 0;
+
+ #103;
+ Reset_n = 1;
+ end
+
+ //--- Emulate UART Transmitter --------------------------------------------
+
+ parameter PRESCALER_16X = 3;
+ integer Prescaler;
+ integer TxLen = 0;
+ reg [2:0] TxState;
+ integer TxBit;
+ reg [1023:0] TxMsg;
+ reg TXD;
+ reg TxDone;
+
+ always @( negedge Reset_n or posedge Clk_100M )
+ if ( ~Reset_n )
+ begin
+ Prescaler <= 0;
+ TxState = 0;
+ TXD = 1;
+ TxBit = 0;
+ TxDone <= 0;
+ end
+ else
+ begin
+ TxDone <= 0;
+
+ if ( Prescaler == ((PRESCALER_16X + 1)*16 -1) )
+ Prescaler <= 0;
+ else
+ Prescaler <= Prescaler + 1;
+
+ if ( Prescaler==0 )
+ begin
+ casez ( TxState )
+ 0: // IDLE
+ begin
+ if ( TxLen != 0 )
+ begin // Send start bit!
+ TxBit = (TxLen-1)*8;
+ TxLen = TxLen - 1;
+ TXD = 0;
+ TxState = 1;
+ end
+ end
+
+ 1: // Send next data bit
+ begin
+ // Send next data bit
+ TXD = TxMsg[ TxBit ];
+ TxBit = TxBit + 1;
+ if ( (TxBit % 8)==0 )
+ // Next send two stop bits
+ TxState = 2;
+ end
+
+ 2: // First of two stop bits
+ begin
+ TXD = 1;
+ TxState = 3;
+ end
+
+ 3: // Second of two stop bits
+ begin
+ TXD = 1;
+ TxState = 0;
+ if ( TxLen == 0 )
+ // Done with transmission!
+ TxDone <= 1;
+ end
+ endcase
+ end
+ end
+
+ assign RS232_RXD = TXD;
+ assign USB_RXD = 1;
+
+ //--- Send commands to the DUT --------------------------------------------
+
+ initial
+ begin
+ #10;
+ while ( ~Reset_n ) #10;
+
+ // Wait a couple of clock edges before continuing to allow
+ // internal logic to get out of reset
+ repeat ( 5 )
+ @( posedge Clk_100M );
+
+ // Wait for the "READY" message to complete transmission
+ #60000;
+
+ // Select 100 Mbps
+ Speed = 3'b010;
+ TxMsg = "W 0022 0002 ";
+ TxLen = 12;
+ while ( ~TxDone )
+ @( posedge Clk_100M );
+
+ #50000;
+
+ TxMsg = "W 8000 8003 ";
+ TxLen = 12;
+ while ( ~TxDone )
+ @( posedge Clk_100M );
+
+ #50000;
+
+ TxMsg = "W 8001 0011 ";
+ TxLen = 12;
+ while ( ~TxDone )
+ @( posedge Clk_100M );
+
+ #50000;
+
+ TxMsg = "W 8002 1234 ";
+ TxLen = 12;
+ while ( ~TxDone )
+ @( posedge Clk_100M );
+
+ #50000;
+
+ TxMsg = "W 8003 5678 ";
+ TxLen = 12;
+ while ( ~TxDone )
+ @( posedge Clk_100M );
+
+ #50000;
+
+ TxMsg = "W 8004 9ABC ";
+ TxLen = 12;
+ while ( ~TxDone )
+ @( posedge Clk_100M );
+
+ #50000;
+
+ TxMsg = "W 8005 DEF0 ";
+ TxLen = 12;
+ while ( ~TxDone )
+ @( posedge Clk_100M );
+
+ #50000;
+
+ TxMsg = "W 8006 C5C0 ";
+ TxLen = 12;
+ while ( ~TxDone )
+ @( posedge Clk_100M );
+
+ #50000;
+
+ TxMsg = "W 8007 BABE ";
+ TxLen = 12;
+ while ( ~TxDone )
+ @( posedge Clk_100M );
+
+ #50000;
+
+ TxMsg = "R 8006 ";
+ TxLen = 7;
+ while ( ~TxDone )
+ @( posedge Clk_100M );
+
+ #50000;
+
+ // Enable PG!
+ TxMsg = "W 1000 0001 ";
+ TxLen = 12;
+ while ( ~TxDone )
+ @( posedge Clk_100M );
+
+ #50000;
+
+ // Read back that PG has been enabled!
+ TxMsg = "R 1000 ";
+ TxLen = 7;
+ while ( ~TxDone )
+ @( posedge Clk_100M );
+
+ #50000;
+
+ #50000;
+
+ Done = 1; #10;
+
+ $stop;
+ end
+
+ //--- Directly accesses a register on the internal Wishbone bus, bypassing the UART interface
+
+ task WrReg;
+ input [15:0] Reg;
+ input [15:0] Data;
+
+ begin
+ end
+ endtask
+
+endmodule
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