Added pll to simulation

SIM/toplevel_tb.v

@@ -23,20 +23,37 @@ module toplevel_tb;
 
         #50 reset_n <= 1'b1;
 
-        #70 button <= 1'b1;
+        // Wait for clk 120 starts
+        @(posedge toplevel_tb.m_toplevel.clk_120);
+
+        #78 button <= 1'b1;
 
         #185 button <= 1'b0;
 
-        #200
+        #400
         $finish;
     end
 
     always #37 clk = ~clk;
 
-`ifdef TIMING_SIM
+    // Simulation stuff
+    // PLL quickstart
+    `ifndef TIMING_SIM
+    reg tb_pll_clk = 1'b0;
+    always #4.15 tb_pll_clk = ~tb_pll_clk;
+    initial begin
+        @(posedge reset_n);
+        repeat (8) @(posedge clk);      // give the model time to measure CLKIN
+        force toplevel_tb.m_toplevel.m_pll.pllvr_inst.LOCK    = 1'b1;
+        force toplevel_tb.m_toplevel.m_pll.pllvr_inst.CLKOUT  = tb_pll_clk;
+        force toplevel_tb.m_toplevel.m_pll.pllvr_inst.CLKOUTP = tb_pll_clk;
+    end
+    `endif
+    // SDF annotation
+    `ifdef TIMING_SIM
     initial begin
         $sdf_annotate("impl/pnr/modem.sdf", m_toplevel, , , "MAXIMUM");
     end
-`endif
+    `endif
 
 endmodule