tests: subsys: usb: negotiated_speed: show logs from device

Wait for enumeration before checking with lsusb.

Signed-off-by: Piotr Kosycarz <[email protected]>

Author: nordic-piks

tests/subsys/usb/negotiated_speed/pytest/test_usb_speed.py

@@ -5,8 +5,11 @@
 import os
 import subprocess
 import sys
+import time
 from typing import Dict
 
+from twister_harness import DeviceAdapter
+
 USB_SAMPLE_ID: str = "NordicSemiconductor USBD MSC sample"
 packet_size_vs_speed: Dict[int, str] = {
     64: "Full Speed",
@@ -32,14 +35,18 @@ def excute_command(
     ).decode(sys.getdefaultencoding())
 
 
-def test_usb_negotaited_speed():
+def test_usb_negotaited_speed(dut: DeviceAdapter):
     """
     Test the USB device negotiated speed
     The nrf54h20 and nrf54lm20 devices
     must attach as High Speed USB device
     """
+    # wait for enumeration
+    time.sleep(2)
+
     usb_devices: str = excute_command("lsusb")
     logger.info(usb_devices)
+    dut.readlines()
 
     failure_info: str = f"{USB_SAMPLE_ID} not found in the USB devices"