forked from tanchou/Verilog
Semaine 6 init
This commit is contained in:
Gamenight77
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import serial
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import time
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import struct
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# === Paramètres de communication ===
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SERIAL_PORT = "COM6" # Modifie selon ton système, ex. "/dev/ttyUSB0" sur Linux
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BAUDRATE = 115200 # Change si différent
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TIMEOUT = 2 # secondes
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# === Commandes (doivent correspondre aux valeurs Verilog) ===
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CMD_STOP = 3
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CMD_ONE = 1
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CMD_CONTINUOUS = 2
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def send_command(ser, command):
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"""Envoie une commande au FPGA"""
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ser.write(bytes([command]))
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def read_distance(ser):
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"""Lit 2 octets et les convertit en distance (int16)"""
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data = ser.read(2)
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if len(data) != 2:
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return None
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# Interprétation little-endian (LSB, MSB)
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lsb, msb = data[0], data[1]
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distance = msb << 8 | lsb
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return distance
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def main():
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with serial.Serial(SERIAL_PORT, BAUDRATE, timeout=TIMEOUT) as ser:
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print("Connexion ouverte sur", SERIAL_PORT)
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mode = input("Mode (one / continuous / stop) ? ").strip().lower()
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if mode == "one":
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send_command(ser, CMD_ONE)
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print("Mesure unique demandée. Attente résultat...")
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time.sleep(0.05)
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distance = read_distance(ser)
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if distance is not None:
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print(f"Distance mesurée : {distance} cm")
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else:
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print("Erreur : distance non reçue.")
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elif mode == "continuous":
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send_command(ser, CMD_CONTINUOUS)
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print("Mesures continues (CTRL+C pour stopper) :")
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try:
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while True:
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distance = read_distance(ser)
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if distance is not None:
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print(f"Distance : {distance} cm")
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else:
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print("... (aucune donnée reçue)")
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time.sleep(0.1)
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except KeyboardInterrupt:
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send_command(ser, CMD_STOP)
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print("\nMesure continue arrêtée.")
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elif mode == "stop":
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send_command(ser, CMD_STOP)
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print("Commande STOP envoyée.")
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else:
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print("Commande invalide.")
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if __name__ == "__main__":
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main()
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@@ -0,0 +1,187 @@
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`timescale 1ns/1ps
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module tb_ultrason_commands;
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// === Signaux ===
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reg clk = 0;
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always #18.5 clk = ~clk; // Horloge 27 MHz (période ~37ns)
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wire tx, rx;
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wire [5:0] leds;
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wire ultrason_sig;
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reg tx_enable = 0;
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wire tx_ready;
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reg [7:0] data_in = 8'h00;
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wire [7:0] data_out;
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wire data_available;
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reg rd_en = 0;
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// === Paramètres ===
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localparam CLK_FREQ = 27_000_000;
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localparam BAUD_RATE = 115_200;
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localparam CLK_PERIOD = 37; // ns
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// === Module testé ===
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top_uart_ultrason_command dut (
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.clk(clk),
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.rx(rx),
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.tx(tx),
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.ultrason_sig(ultrason_sig),
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.leds(leds)
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);
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// === Simulation capteur ultrason ===
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// Supposons que fake_sensor fournit un signal 'distance' pour vérification
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wire [15:0] sensor_distance;
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ultrasonic_sensor fake_sensor (
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.clk(clk),
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.signal(ultrason_sig),
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);
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// === RX FIFO pour observer la sortie UART ===
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uart_rx_fifo #(
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.CLK_FREQ(CLK_FREQ),
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.BAUD_RATE(BAUD_RATE)
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) uart_rx_fifo_inst (
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.clk(clk),
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.rx_pin(tx),
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.rd_en(rd_en),
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.rd_data(data_out),
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.data_available(data_available)
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);
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// === TX pour injecter des commandes UART ===
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uart_tx #(
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.CLK_FREQ(CLK_FREQ),
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.BAUD_RATE(BAUD_RATE)
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) uart_tx_inst (
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.clk(clk),
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.tx_enable(tx_enable),
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.tx_ready(tx_ready),
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.data(data_in),
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.tx(rx),
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.rst_p(1'b0)
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);
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// === Tâches pour simplifier les tests ===
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task send_command(input [7:0] cmd);
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begin
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wait(tx_ready);
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$display("[%0t ns] Envoi commande: %0d", $time, cmd);
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data_in = cmd;
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tx_enable = 1;
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#(CLK_PERIOD * 2);
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tx_enable = 0;
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end
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endtask
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task read_distance(output [15:0] distance);
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reg [7:0] lsb, msb;
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begin
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// Attendre premier octet (LSB)
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wait(data_available);
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#(CLK_PERIOD);
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rd_en = 1;
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#(CLK_PERIOD);
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lsb = data_out;
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rd_en = 0;
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$display("[%0t ns] Reçu octet LSB: %0d", $time, lsb);
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// Attendre second octet (MSB)
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wait(data_available);
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#(CLK_PERIOD);
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rd_en = 1;
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#(CLK_PERIOD);
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msb = data_out;
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rd_en = 0;
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$display("[%0t ns] Reçu octet MSB: %0d", $time, msb);
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distance = {msb, lsb};
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end
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endtask
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task check_leds(input [7:0] cmd);
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begin
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#(CLK_PERIOD * 10); // Attendre mise à jour des LEDs
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if (leds !== cmd[7:2]) begin
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$display("[%0t ns] ERREUR: LEDs=%b, attendu=%b", $time, leds, cmd[7:2]);
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end else begin
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$display("[%0t ns] LEDs correctes: %b", $time, leds);
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end
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end
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endtask
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// === Séquence de test ===
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initial begin
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$dumpfile("runs/ultrason_commands.vcd");
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$dumpvars(0, tb_ultrason_commands);
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$display("==== Début Test UART Ultrason ====");
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// Initialisation
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#(CLK_PERIOD * 10);
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// Test 1: Commande ONE (8'd1)
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$display("=== Test 1: Commande ONE ===");
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send_command(8'd1); // Commande: ONE
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check_leds(8'd1);
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begin
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reg [15:0] received_distance;
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read_distance(received_distance);
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if (received_distance == sensor_distance) begin
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$display("[%0t ns] Distance correcte: %0d", $time, received_distance);
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end else begin
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$display("[%0t ns] ERREUR: Distance reçue=%0d, attendu=%0d", $time, received_distance, sensor_distance);
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end
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end
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// Test 2: Commande CONTINUOUS (8'd2)
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$display("=== Test 2: Commande CONTINUOUS ===");
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send_command(8'd2); // Commande: CONTINUOUS
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check_leds(8'd2);
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repeat (3) begin // Lire 3 mesures consécutives
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reg [15:0] received_distance;
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read_distance(received_distance);
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if (received_distance == sensor_distance) begin
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$display("[%0t ns] Distance continue correcte: %0d", $time, received_distance);
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end else begin
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$display("[%0t ns] ERREUR: Distance reçue=%0d, attendu=%0d", $time, received_distance, sensor_distance);
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end
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#(CLK_PERIOD * 13500000); // Attendre ~0.5s (délai dans WAIT)
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end
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// Test 3: Commande STOP (8'd3)
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$display("=== Test 3: Commande STOP ===");
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send_command(8'd3); // Commande: STOP
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check_leds(8'd3);
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#(CLK_PERIOD * 13500000); // Attendre pour vérifier l'arrêt
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if (data_available) begin
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$display("[%0t ns] Vérification STOP: aucune donnée ne doit être reçue", $time);
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#(CLK_PERIOD * 1000);
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if (data_available) begin
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$display("[%0t ns] ERREUR: Données reçues après STOP", $time);
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end else begin
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$display("[%0t ns] STOP correct: aucune donnée reçue", $time);
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end
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end
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// Test 4: Commande invalide (8'd4)
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$display("=== Test 4: Commande invalide ===");
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send_command(8'd4); // Commande invalide
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#(CLK_PERIOD * 1000);
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if (data_available) begin
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$display("[%0t ns] ERREUR: Données reçues pour commande invalide", $time);
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end else begin
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$display("[%0t ns] Commande invalide ignorée correctement", $time);
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end
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// Fin de la simulation
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$display("==== Fin Test UART Ultrason ====");
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#(CLK_PERIOD * 1000);
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$stop;
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end
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endmodule
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