Updated bus tb to match harvard tb

testbench/mips_cpu_bus_tb.v

@@ -1,61 +1,79 @@
 module mips_cpu_bus_tb;
-    timeunit 1ns / 10ps;
 
-    parameter RAM_INIT_FILE = "test/01-binary/countdown.hex.txt";
-    parameter TIMEOUT_CYCLES = 10000;
+parameter INSTR_INIT_FILE = "inputs/addiu.txt";
+parameter DATA_INIT_FILE = "inputs/addiu.data.txt";
+parameter TIMEOUT_CYCLES = 1000; // Timeout cycles are higher to account for memory stall delays
 
-    logic clk;
-    logic rst;
+logic clk, reset, active, write, read, waitrequest;
+logic[31:0] address, register_v0, writedata, readdata;
+logic[3:0] byteenable;
 
-    logic running;
+mips_cpu_bus_memory #(INSTR_INIT_FILE, DATA_INIT_FILE) memInst( //Avalon memory mapped bus controller (slave)
+    .clk(clk), // clk input to mem
+    .address(address), // addr input to mem
+    .write(write), // write flag input
+    .read(read), // read flag input
+    .waitrequest(waitrequest), // mem stall output
+    .writedata(writedata), // data to be written
+    .byteenable(byteenable), // byteenable bus for writes
+    .readdata(readdata) // read output port
+);
 
-    logic[11:0] address;
-    logic write;
-    logic read;
-    logic[15:0] writedata;
-    logic[15:0] readdata;
+mips_cpu_bus cpuInst(
+    .clk(clk), // clk input to cpu wrapper
+    .reset(reset), // reset input
+    .active(active), // active output flag
+    .register_v0(register_v0), // debug $2 or $v0 output bus
+    .address(address), // mem addr output
+    .write(write), // mem write output flag
+    .read(read), // mem read output flag
+    .waitrequest(waitrequest), // mem stall input flag
+    .writedata(writedata), // data to write to mem output
+    .byteenable(byteenable), // bytes to write output
+    .readdata(readdata) // data from mem input
+);
 
-    RAM_16x4096_delay1 #(RAM_INIT_FILE) ramInst(clk, address, write, read, writedata, readdata);
-    
-    CPU_MU0_delay1 cpuInst(clk, rst, running, address, write, read, writedata, readdata);
+// Setup and clock
+initial begin
+    $dumpfile("mips_cpu_bus.vcd");
+    $dumpvars(0,mips_cpu_bus_tb);
+    clk=0;
 
-    // Generate clock
-    initial begin
-        clk=0;
-
-        repeat (TIMEOUT_CYCLES) begin
-            #10;
-            clk = !clk;
-            #10;
-            clk = !clk;
-        end
-
-        $fatal(2, "Simulation did not finish within %d cycles.", TIMEOUT_CYCLES);
+    repeat (TIMEOUT_CYCLES) begin
+        #10;
+        clk = !clk;
+        #10;
+        clk = !clk;
     end
 
-    initial begin
-        rst <= 0;
+    $fatal(2, "Simulation did not finish within %d cycles.", TIMEOUT_CYCLES);
+end
 
+initial begin    
+    reset <= 1;
+    @(posedge clk);
+    reset <= 0;
+
+    @(posedge clk);
+    assert(active==1)
+    else $display("TB : CPU did not set active=1 after reset.");
+
+    while (active) begin
+        //$display("Clk: %d", clk);
         @(posedge clk);
-        rst <= 1;
-
-        @(posedge clk);
-        rst <= 0;
-
-        @(posedge clk);
-        assert(running==1)
-        else $display("TB : CPU did not set running=1 after reset.");
-
-        while (running) begin
-            @(posedge clk);
-        end
-
-        $display("TB : finished; running=0");
-
-        $finish;
-        
+        //$display("Register v0: %d", register_v0);
+        //$display("Reg File Write data: %d", cpuInst.in_writedata);
+        $display("Reg File Out Read data: %h", cpuInst.mips_cpu_harvard.out_readdata1);
+        $display("Reg File opcode: %b", cpuInst.mips_cpu_harvard.regfile.opcode);
+        //$display("ALU output: %h", cpuInst.out_ALURes);
+        //$display("ALU input B: %h", cpuInst.alu.B);
     end
 
-    
+    @(posedge clk);
+    $display("TB: CPU Halt; active=0");
+    $display("Output:");
+    $display("%d",register_v0);
+    $finish;
+end
 
 endmodule