samples: usb: testusb: use new USB device stack

Rework sample to use new USB device stack.

Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>

Author: jfischer-no

samples/subsys/usb/testusb/CMakeLists.txt

@@ -4,5 +4,6 @@ cmake_minimum_required(VERSION 3.20.0)
 find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
 project(testusb)
 
+include(${ZEPHYR_BASE}/samples/subsys/usb/common/common.cmake)
 FILE(GLOB app_sources src/*.c)
 target_sources(app PRIVATE ${app_sources})

samples/subsys/usb/testusb/Kconfig

@@ -0,0 +1,9 @@
+# Copyright (c) 2023 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+# Source common USB sample options used to initialize new experimental USB
+# device stack. The scope of these options is limited to USB samples in project
+# tree, you cannot use them in your own application.
+source "samples/subsys/usb/common/Kconfig.sample_usbd"
+
+source "Kconfig.zephyr"

samples/subsys/usb/testusb/README.rst

@@ -1,6 +1,6 @@
 .. zephyr:code-sample:: testusb-app
-   :name: USB testing application
-   :relevant-api: _usb_device_core_api
+   :name: USB device testing application
+   :relevant-api: usbd_api
 
    Test USB device drivers using a loopback function.
 

samples/subsys/usb/testusb/prj.conf

@@ -1,11 +1,11 @@
-CONFIG_STDOUT_CONSOLE=y
+CONFIG_USB_DEVICE_STACK_NEXT=y
+CONFIG_USBD_LOOPBACK_CLASS=y
+CONFIG_UDC_BUF_POOL_SIZE=4096
 
-#USB related configs
-CONFIG_USB_DEVICE_STACK=y
-CONFIG_USB_DEVICE_PRODUCT="Zephyr testusb sample"
-CONFIG_USB_DEVICE_PID=0x0009
 CONFIG_LOG=y
-CONFIG_USB_DRIVER_LOG_LEVEL_ERR=y
-CONFIG_USB_DEVICE_LOOPBACK=y
-CONFIG_USB_DEVICE_LOG_LEVEL_ERR=y
-CONFIG_USB_DEVICE_INITIALIZE_AT_BOOT=n
+CONFIG_USBD_LOG_LEVEL_ERR=y
+CONFIG_UDC_DRIVER_LOG_LEVEL_ERR=y
+CONFIG_USBD_LOOPBACK_LOG_LEVEL_ERR=y
+
+CONFIG_SAMPLE_USBD_PID=0x0009
+CONFIG_SAMPLE_USBD_PRODUCT="Zephyr testusb sample"

samples/subsys/usb/testusb/sample.yaml

@@ -1,7 +1,7 @@
 sample:
-  name: USB loopback sample
+  name: USB device loopback sample
 tests:
-  sample.usb.loopback:
-    depends_on: usb_device
+  sample.usbd.loopback:
+    depends_on: usbd
     tags: usb
-    harness: button
+    harness: TBD

samples/subsys/usb/testusb/src/main.c

@@ -1,24 +1,37 @@
 /*
- * Copyright (c) 2018 Phytec Messtechnik GmbH
+ * Copyright (c) 2025 Nordic Semiconductor ASA
  *
  * SPDX-License-Identifier: Apache-2.0
  */
 
-#include <zephyr/kernel.h>
+#include <sample_usbd.h>
+#include <zephyr/usb/usbd.h>
+
 #include <zephyr/logging/log.h>
-#include <zephyr/usb/usb_device.h>
-LOG_MODULE_REGISTER(main);
+LOG_MODULE_REGISTER(main, LOG_LEVEL_INF);
 
 int main(void)
 {
+	struct usbd_context *sample_usbd;
 	int ret;
 
-	ret = usb_enable(NULL);
-	if (ret != 0) {
-		LOG_ERR("Failed to enable USB");
-		return 0;
+	sample_usbd = sample_usbd_setup_device(NULL);
+	if (sample_usbd == NULL) {
+		LOG_ERR("Failed to setup USB device");
+		return -ENODEV;
+	}
+
+	ret = usbd_init(sample_usbd);
+	if (ret) {
+		LOG_ERR("Failed to initialize device support");
+		return ret;
+	}
+
+	ret = usbd_enable(sample_usbd);
+	if (ret) {
+		LOG_ERR("Failed to enable device support");
+		return ret;
 	}
 
-	LOG_INF("entered main.");
 	return 0;
 }