hdl/testbench/*/**/full_tb/wb_acq_core_tb.v: emulate gnt signal behavior

In our design the UI interface *_rdy signals are only muxed to the DDR3 controller when the PCIe core had granted access to it. Otherwise, it keeps the signals low.

hdl/testbench/*/**/full_tb/wb_acq_core_tb.v: emulate gnt signal behavior
In our design the UI interface *_rdy signals are only muxed to the DDR3 controller when the PCIe core had granted access to it. Otherwise, it keeps the signals low.
a35a97d0 · Lucas Russo · 3aa68789 · a35a97d0
Commit a35a97d0 authored Nov 02, 2014 by Lucas Russo
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wb_acq_core_tb.v .../wb_acq_core_test/verilog/artix7/full_tb/wb_acq_core_tb.v +10 -2

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--- a/hdl/testbench/wishbone/wb_acq_core_test/verilog/artix7/full_tb/wb_acq_core_tb.v
+++ b/hdl/testbench/wishbone/wb_acq_core_test/verilog/artix7/full_tb/wb_acq_core_tb.v
@@ -536,6 +536,8 @@ module wb_acq_core_tb;
  wire                                      ui_app_en;
  wire                                      ui_app_rdy;
  wire                                      ui_app_wdf_rdy;
+  wire                                      ui_app_rdy_ddr;
+  wire                                      ui_app_wdf_rdy_ddr;
  wire [DDR3_PAYLOAD_WIDTH-1:0]
  					    ui_app_rd_data;
  wire                                      ui_app_rd_data_end;
@@ -699,6 +701,12 @@ module wb_acq_core_tb;
      end
    end
  end
+  
+  // In our use case, the lines ui_app_rdy and ui_app_wdf_rdy are only high
+  // if the DDR core drives it high AND if the PCIe arbiter grants us. So,
+  // we emulate this behavior here
+  assign ui_app_rdy = ui_app_rdy_ddr & ui_app_gnt;
+  assign ui_app_wdf_rdy = ui_app_wdf_rdy_ddr & ui_app_gnt;

  //**************************************************************************//
  // Data readback checker instantiation
@@ -929,8 +937,8 @@ module wb_acq_core_tb;
    // Only accept transaction if access to the DDR3 controller was granted
    // before
    .app_en                                 (ui_app_en & ui_app_gnt),
-    .app_rdy                                (ui_app_rdy),
-    .app_wdf_rdy                            (ui_app_wdf_rdy),
+    .app_rdy                                (ui_app_rdy_ddr),
+    .app_wdf_rdy                            (ui_app_wdf_rdy_ddr),
    .app_rd_data                            (ui_app_rd_data),
    .app_rd_data_end                        (ui_app_rd_data_end),
    .app_rd_data_valid                      (ui_app_rd_data_valid),