usb: Add USB host CDC-ACM class driver

tools/test_apps/peripherals/usb/CMakeLists.txt

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+# The following lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+
+set(EXTRA_COMPONENT_DIRS $ENV{IDF_PATH}/examples/peripherals/usb/host/cdc/common)
+
+# Set the components to include the tests for.
+set(TEST_COMPONENTS "cdc_acm_host" CACHE STRING "List of components to test")
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(usb_test_app)

tools/test_apps/peripherals/usb/README.md

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+| Supported Targets | ESP32-S2 | ESP32-S3 |
+| ----------------- | -------- | -------- |
+
+# USB Host CDC-ACM driver test project
+
+Main purpose of this application is to test the USB Host CDC-ACM driver.
+It tests basic functionality of the driver like open/close/read/write operations,
+advanced features like CDC control request, multi-threaded or multi-device access,
+as well as reaction to sudden disconnection and other error states.
+
+## Hardware Required
+
+This test expects that TinyUSB dual CDC device with VID = 0x303A and PID = 0x4002
+is connected to the USB host.

tools/test_apps/peripherals/usb/main/CMakeLists.txt

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+idf_component_register(SRCS "usb_test_main.c"
+                       INCLUDE_DIRS ""
+                       REQUIRES unity)

tools/test_apps/peripherals/usb/main/usb_test_main.c

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+/*
+ * SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "unity.h"
+
+void app_main(void)
+{
+    UNITY_BEGIN();
+    unity_run_all_tests();
+    UNITY_END();
+}