refactor: renamed top.v to riscv.v

riscv-ac.srcs/sim_1/new/tb_riscv.v

@@ -0,0 +1,103 @@
+`timescale 1ns / 1ps
+//////////////////////////////////////////////////////////////////////////////////
+// Company: nope
+// Engineer: Jose
+// 
+// Create Date: 02/20/2026 09:21:52 AM
+// Design Name: RISCV AC Processor Simulation
+// Module Name: tb_riscv
+// Project Name: riscv-ac
+// Target Devices: Artix 7
+// Tool Versions: 2025.2
+// Description: Testbench for simulation + MMIO
+// 
+// Dependencies: 
+// 
+// Revision: 2.0 - MMIO
+// Revision: 1.0 - Basic structure
+// Revision: 0.01 - File Created
+// Additional Comments:
+// 
+//////////////////////////////////////////////////////////////////////////////////
+
+
+`timescale 1ns / 1ps
+
+module tb_riscv();
+    reg clk;
+    reg rst;
+    
+    wire [1:0] leds;
+    wire [7:0] uart_tx_data;
+    wire uart_tx_en;
+    reg rx;
+    wire tx;
+
+    riscv uut (
+        .clk(clk),
+        .rst(rst),
+        .rx(rx),
+        .tx(tx),
+        .leds(leds),
+        .uart_tx_data(uart_tx_data),
+        .uart_tx_en(uart_tx_en)
+    );
+    
+    // T_CLK = 10ns
+    always #5 clk = ~clk;
+    
+    task send_uart_byte;
+        input [7:0] data;
+        integer i;
+        begin
+            // 1. Bit de Start (bajamos a 0)
+            rx = 0;
+            #(868 * 10); // Esperamos los ciclos de 1 bit (104 ciclos * 10ns)
+            
+            // 2. Mandamos los 8 bits de datos (LSB primero, de derecha a izquierda)
+            for (i = 0; i < 8; i = i + 1) begin
+                rx = data[i];
+                #(868 * 10);
+            end
+            
+            // 3. Bit de Stop (subimos a 1)
+            rx = 1;
+            #(868 * 10);
+        end
+    endtask
+
+    initial begin
+        // inicializamos señales
+        clk = 0;
+        rst = 1;
+        rx = 1;
+
+        // (SOLO SIMULACION) cargamos programa
+        //$readmemh("/home/jomaa/git/riscv-ac/riscv-ac.srcs/sim_1/new/program.mem", uut.u_imem.memory);
+
+        // activamos reset 20ns
+        #20;
+        rst = 0;
+
+        // mandamos instrucciones
+        #100;
+        
+        // 1. addi x5, x0, 65 (04100293) -> cargamos 'A' (65) en x5
+        send_uart_byte(8'h93); send_uart_byte(8'h02); send_uart_byte(8'h10); send_uart_byte(8'h04);
+
+        // 2. addi x6, x0, -4 (ffc00313) -> cargamos la dirección de la UART mapeada (0xFFFFFFFC) en x6
+        send_uart_byte(8'h13); send_uart_byte(8'h03); send_uart_byte(8'hC0); send_uart_byte(8'hFF);
+
+        // 3. sw x5, 0(x6) (00532023) -> alla que va pa la UART
+        send_uart_byte(8'h23); send_uart_byte(8'h20); send_uart_byte(8'h53); send_uart_byte(8'h00);
+
+        // 4. jal x0, 0 (0000006f) -> fin
+        send_uart_byte(8'h6F); send_uart_byte(8'h00); send_uart_byte(8'h00); send_uart_byte(8'h00);
+        
+        #(55000 * 10)
+        
+        #2000;
+
+        $finish;
+    end
+endmodule