Add testbench for top_ultrasonic_led module

- Created a new testbench file `top_ultrasonic_led_tb.vvp` to simulate the `top_ultrasonic_led` module.
- Defined the necessary signals and events for testing the ultrasonic sensor functionality.
- Implemented the main test sequence including triggering the ultrasonic sensor and monitoring the output LEDs based on distance measurements.
- Included timing and state management for accurate simulation of the ultrasonic sensor behavior.

Semaine 1/Capteur_recule/tb_top_ultrasonic_led.v

@@ -0,0 +1,61 @@
+`timescale 1ns/1ps
+
+module tb_top_ultrasonic_led;
+
+    reg clk;
+    reg rst;
+    reg start;
+    reg echo;
+    wire trig;
+    wire [5:0] leds;
+
+    // Instance du module top
+    top_ultrasonic_led uut (
+        .clk(clk),
+        .rst(rst),
+        .start(start),
+        .echo(echo),
+        .trig(trig),
+        .leds(leds)
+    );
+
+    always #18.5 clk = ~clk;
+
+    initial begin
+        // Initialisation
+        $dumpfile("top_ultrasonic_led.vcd");
+        $dumpvars(0, tb_top_ultrasonic_led);
+
+        clk = 0;
+        rst = 1;
+        start = 0;
+        echo = 0;
+
+        #100;      
+        rst = 0;
+
+        #50;
+        start = 1;  
+        #20;
+        start = 0;
+
+        // Attente du signal trig
+        wait (trig == 1);
+        $display("TRIG HIGH at %t", $time);
+        wait (trig == 0);
+        $display("TRIG LOW at %t", $time);
+
+        repeat (500) @(posedge clk);
+        echo = 1;
+        #12000
+
+        echo = 0;
+
+        repeat (500) @(posedge clk);
+
+        $display("Leds allumer : %b", leds);
+
+        $finish;
+    end
+
+endmodule