Add DHT11 interface and UART integration for ultrasonic sensor project

- Created DHT11 interface in Verilog to handle communication with DHT11 sensor.
- Implemented LED control logic to indicate sensor status and data readiness.
- Added project scripts for building, cleaning, and simulating the design.
- Established constraints for FPGA pin assignments.
- Developed testbench for DHT11 UART communication.
- Updated README files to reflect project functionality and commands.

Semaine_5/DHT11_LEDS/src/verilog/dht11_leds.v

@@ -0,0 +1,58 @@
+module dht11_leds (
+    input wire          clk, // 27 MHz
+    inout wire          dht11_sig,
+    input wire          start,
+    output reg [5:0]   leds
+);
+    // === Registres ===
+    wire io_dht11_sig;
+    reg dht11_start;
+    wire dht11_data_ready;
+    wire dht11_busy;
+    wire [7:0] dht11_temp_data;
+    wire [7:0] dht11_hum_data;
+    wire dht11_error;
+
+    dht11_interface dht11_interface (
+        .i_clk(clk),
+        .io_dht11_sig(io_dht11_sig),
+        .i_start(dht11_start),
+        .o_dht11_data_ready(dht11_data_ready),
+        .o_busy(dht11_busy),
+        .o_temp_data(dht11_temp_data),
+        .o_hum_data(dht11_hum_data),
+        .o_dht11_error(dht11_error)
+    );
+
+    initial begin
+        dht11_start = 0;
+        leds = 6'b000000;
+    end
+
+    always @(posedge clk) begin
+        if (start) begin
+            dht11_start = 1; // Démarre la lecture des données
+            leds[0] = 1; // LED verte allumée
+        end else begin
+            dht11_start = 0; // Arrête la lecture des données
+            leds[0] = 0; // LED verte éteinte
+        end
+
+        if (dht11_busy) begin
+            leds[1] = 1; // LED jaune allumée
+        end else begin
+            leds[1] = 0; // LED jaune éteinte
+        end
+
+        if (dht11_data_ready) begin
+            leds = {dht11_temp_data[7:4], dht11_hum_data[7:4]}; // Affiche les données sur les LEDs
+        end 
+
+        if (dht11_error) begin
+            leds[5:3] = 3'b111; // Toutes les LEDs allumées en cas d'erreur
+        end else begin
+            leds[5:3] = 3'b000; // Éteint les LEDs si pas d'erreur
+        end
+    end
+
+endmodule