Add testbench for SoC simulation

diff --git a/gram/simulation/simsoctb.v b/gram/simulation/simsoctb.v
new file mode 100644 (file)
index 0000000..84d7c86
--- /dev/null
+++ b/gram/simulation/simsoctb.v
@@ -0,0 +1,106 @@
+// This file is Copyright (c) 2020 LambdaConcept <contact@lambdaconcept.com>
+
+`timescale 1 ns / 1 ps
+
+module simsoctb;
+  // GSR & PUR init requires for Lattice models
+  GSR GSR_INST (
+    .GSR(1'b1)
+  );
+  PUR PUR_INST (
+    .PUR (1'b1)
+  );
+
+  reg clkin;
+  wire sync;
+  wire sync2x;
+  wire dramsync;
+  wire init;
+
+  // Generate 100 Mhz clock
+  always 
+  begin
+    clkin = 1'b1; 
+    #5;
+    clkin = 1'b0;
+    #5;
+  end
+
+  // UART
+  wire uart_rx;
+  wire uart_tx;
+
+  // DDR3 init
+  wire dram_ck;
+  wire dram_cke;
+  wire dram_we_n;
+  wire dram_ras_n;
+  wire dram_cas_n;
+  wire [15:0] dram_dq;
+  wire [1:0] dram_dqs;
+  wire [1:0] dram_dqs_n;
+  wire [13:0] dram_a;
+  wire [2:0] dram_ba;
+  wire [1:0] dram_dm;
+  wire dram_odt;
+  wire [1:0] dram_tdqs_n;
+
+  ddr3 ram_chip (
+    .rst_n(1'b1),
+    .ck(dram_ck),
+    .ck_n(dram_ck_n),
+    .cke(dram_cke),
+    .cs_n(1'b0),
+    .ras_n(dram_ras_n),
+    .cas_n(dram_cas_n),
+    .we_n(dram_we_n),
+    .dm_tdqs(dram_dm),
+    .ba(dram_ba),
+    .addr(dram_a),
+    .dq(dram_dq),
+    .dqs(dram_dqs),
+    .dqs_n(dram_dqs_n),
+    .tdqs_n(dram_tdqs_n),
+    .odt(dram_odt)
+  );
+  
+  top simsoctop (
+    .ddr3_0__dq__io(dram_dq),
+    .ddr3_0__dqs__io(dram_dqs),
+    .ddr3_0__clk__io(dram_ck),
+    .ddr3_0__cke__io(dram_cke),
+    .ddr3_0__we_n__io(dram_we_n),
+    .ddr3_0__ras_n__io(dram_ras_n),
+    .ddr3_0__cas_n__io(dram_cas_n),
+    .ddr3_0__a__io(dram_a),
+    .ddr3_0__ba__io(dram_ba),
+    .ddr3_0__dm__io(dram_dm),
+    .ddr3_0__odt__io(dram_odt),
+    .clk100_0__io(clkin),
+    .rst_0__io(1'b0),
+    .uart_0__rx__io(uart_rx),
+    .uart_0__tx__io(uart_tx)
+  );
+
+  initial
+  begin
+    $dumpfile("simsoc.fst");
+    $dumpvars(0, clkin);
+    $dumpvars(0, dram_dq);
+    $dumpvars(0, dram_dqs);
+    $dumpvars(0, dram_ck);
+    $dumpvars(0, dram_cke);
+    $dumpvars(0, dram_we_n);
+    $dumpvars(0, dram_ras_n);
+    $dumpvars(0, dram_cas_n);
+    $dumpvars(0, dram_a);
+    $dumpvars(0, dram_ba);
+    $dumpvars(0, dram_dm);
+    $dumpvars(0, dram_odt);
+    $dumpvars(0, uart_rx);
+    $dumpvars(0, uart_tx);
+    $dumpvars(0, simsoctop);
+
+    #10000 $finish;
+  end
+endmodule