Fix testbench to match new file organization.

1 files changed, 59 insertions, 42 deletions

diff --git a/src/tb/tb_uart.v b/src/tb/tb_uart.v
index 1abdd34..6bf18bf 100644
--- a/src/tb/tb_uart.v
+++ b/src/tb/tb_uart.v
@@ -51,7 +51,11 @@ module tb_uart();
 
   parameter CLK_HALF_PERIOD = 1;
   parameter CLK_PERIOD      = CLK_HALF_PERIOD * 2;
-  
+
+   // from uart_regs.v
+   parameter DEFAULT_BIT_RATE  = 16'd5208;
+   parameter DEFAULT_DATA_BITS = 4'h8;
+   parameter DEFAULT_STOP_BITS = 2'h1;
   
   //----------------------------------------------------------------
   // Register and Wire declarations.
@@ -80,36 +84,46 @@ module tb_uart();
 
   reg          txd_state;
   
-
   //----------------------------------------------------------------
   // Device Under Test.
   //----------------------------------------------------------------
-  uart dut(
-           .clk(tb_clk),
-           .reset_n(tb_reset_n),
-           
-           .rxd(tb_rxd),
-           .txd(tb_txd),
-           
-           .rxd_syn(tb_rxd_syn),
-           .rxd_data(tb_rxd_data),
-           .rxd_ack(tb_rxd_ack),
-           
-           // Internal transmit interface.
-           .txd_syn(tb_txd_syn),
-           .txd_data(tb_txd_data),
-           .txd_ack(tb_txd_ack),
-
-            // API interface.
-            .cs(tb_cs),
-            .we(tb_we),
-            .address(tb_address),
-            .write_data(tb_write_data),
-            .read_data(tb_read_data),
-            .error(tb_error),
-           
-           .debug(tb_debug)
-          );
+   uart_core dut_core
+     (
+      .clk(tb_clk),
+      .reset_n(tb_reset_n),
+
+      // Configuration parameters
+      .bit_rate(DEFAULT_BIT_RATE),
+      .data_bits(DEFAULT_DATA_BITS),
+      .stop_bits(DEFAULT_STOP_BITS),
+
+      // External data interface
+      .rxd(tb_rxd),
+      .txd(tb_txd),
+
+      // Internal receive interface.
+      .rxd_syn(tb_rxd_syn),
+      .rxd_data(tb_rxd_data),
+      .rxd_ack(tb_rxd_ack),
+      
+      // Internal transmit interface.
+      .txd_syn(tb_txd_syn),
+      .txd_data(tb_txd_data),
+      .txd_ack(tb_txd_ack)
+      );
+
+//  comm_regs dut_regs(
+//           .clk(tb_clk),
+//           .rst(~tb_reset_n),
+//           
+//            // API interface.
+//            .cs(tb_cs),
+//            .we(tb_we),
+//            .address(tb_address),
+//            .write_data(tb_write_data),
+//            .read_data(tb_read_data),
+//            .error(tb_error)
+//          );
 
   //----------------------------------------------------------------
   // Concurrent assignments.
@@ -183,23 +197,23 @@ module tb_uart();
       $display("------------");
       $display("Inputs and outputs:");
       $display("rxd = 0x%01x, txd = 0x%01x,", 
-               dut.core.rxd, dut.core.txd);
+               dut_core.rxd, dut_core.txd);
       $display("");
 
       $display("Sample and data registers:");
       $display("rxd_reg = 0x%01x, rxd_byte_reg = 0x%01x", 
-               dut.core.rxd_reg, dut.core.rxd_byte_reg);
+               dut_core.rxd_reg, dut_core.rxd_byte_reg);
       $display("");
 
       $display("Counters:");
       $display("rxd_bit_ctr_reg = 0x%01x, rxd_bitrate_ctr_reg = 0x%02x", 
-               dut.core.rxd_bit_ctr_reg, dut.core.rxd_bitrate_ctr_reg);
+               dut_core.rxd_bit_ctr_reg, dut_core.rxd_bitrate_ctr_reg);
       $display("");
       
 
       $display("Control signals and FSM state:");
       $display("erx_ctrl_reg = 0x%02x", 
-               dut.core.erx_ctrl_reg);
+               dut_core.erx_ctrl_reg);
       $display("");
     end
   endtask // dump_dut_state
@@ -214,8 +228,8 @@ module tb_uart();
   task dump_rx_state();
     begin
       $display("rxd = 0x%01x, rxd_reg = 0x%01x, rxd_byte_reg = 0x%01x, rxd_bit_ctr_reg = 0x%01x, rxd_bitrate_ctr_reg = 0x%02x, rxd_syn = 0x%01x, erx_ctrl_reg = 0x%02x", 
-               dut.core.rxd, dut.core.rxd_reg, dut.core.rxd_byte_reg, dut.core.rxd_bit_ctr_reg, 
-               dut.core.rxd_bitrate_ctr_reg, dut.core.rxd_syn, dut.core.erx_ctrl_reg);
+               dut_core.rxd, dut_core.rxd_reg, dut_core.rxd_byte_reg, dut_core.rxd_bit_ctr_reg, 
+               dut_core.rxd_bitrate_ctr_reg, dut_core.rxd_syn, dut_core.erx_ctrl_reg);
     end
   endtask // dump_dut_state
   
@@ -229,8 +243,8 @@ module tb_uart();
   task dump_tx_state();
     begin
       $display("txd = 0x%01x, txd_reg = 0x%01x, txd_byte_reg = 0x%01x, txd_bit_ctr_reg = 0x%01x, txd_bitrate_ctr_reg = 0x%02x, txd_ack = 0x%01x, etx_ctrl_reg = 0x%02x", 
-               dut.core.txd, dut.core.txd_reg, dut.core.txd_byte_reg, dut.core.txd_bit_ctr_reg, 
-               dut.core.txd_bitrate_ctr_reg, dut.core.txd_ack, dut.core.etx_ctrl_reg);
+               dut_core.txd, dut_core.txd_reg, dut_core.txd_byte_reg, dut_core.txd_bit_ctr_reg, 
+               dut_core.txd_bitrate_ctr_reg, dut_core.txd_ack, dut_core.etx_ctrl_reg);
     end
   endtask // dump_dut_state
 
@@ -288,20 +302,23 @@ module tb_uart();
       // Start bit
       $display("*** Transmitting start bit.");
       tb_rxd = 0;
-      #(CLK_PERIOD * dut.DEFAULT_BIT_RATE);
+//      #(CLK_PERIOD * dut_regs.DEFAULT_BIT_RATE);
+      #(CLK_PERIOD * DEFAULT_BIT_RATE);
 
       // Send the bits LSB first.
       for (i = 0 ; i < 8 ; i = i + 1)
         begin
           $display("*** Transmitting data[%1d] = 0x%01x.", i, data[i]);
           tb_rxd = data[i];
-          #(CLK_PERIOD * dut.DEFAULT_BIT_RATE);
+//          #(CLK_PERIOD * dut_regs.DEFAULT_BIT_RATE);
+          #(CLK_PERIOD * DEFAULT_BIT_RATE);
         end
 
       // Send two stop bits. I.e. two bit times high (mark) value.
       $display("*** Transmitting two stop bits.");
       tb_rxd = 1;
-      #(2 * CLK_PERIOD * dut.DEFAULT_BIT_RATE * dut.DEFAULT_STOP_BITS);
+//      #(2 * CLK_PERIOD * dut_regs.DEFAULT_BIT_RATE * dut_regs.DEFAULT_STOP_BITS);
+      #(2 * CLK_PERIOD * DEFAULT_BIT_RATE * DEFAULT_STOP_BITS);
       $display("*** End of transmission.");
     end
   endtask // transmit_byte
@@ -319,15 +336,15 @@ module tb_uart();
 
       transmit_byte(data);
       
-      if (dut.core.rxd_byte_reg == data)
+      if (dut_core.rxd_byte_reg == data)
         begin
           $display("*** Correct data: 0x%01x captured by the dut.", 
-                   dut.core.rxd_byte_reg);
+                   dut_core.rxd_byte_reg);
         end
       else
         begin
           $display("*** Incorrect data: 0x%01x captured by the dut Should be: 0x%01x.",
-                   dut.core.rxd_byte_reg, data);
+                   dut_core.rxd_byte_reg, data);
           error_ctr = error_ctr + 1;
         end
     end