text: /**
   * Copyright (c) 2017 - 2019, Nordic Semiconductor ASA
   *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form, except as embedded into a Nordic
   *    Semiconductor ASA integrated circuit in a product or a software update for
   *    such product, must reproduce the above copyright notice, this list of
   *    conditions and the following disclaimer in the documentation and/or other
   *    materials provided with the distribution.
   *
   * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
   *    contributors may be used to endorse or promote products derived from this
   *    software without specific prior written permission.
   *
   * 4. This software, with or without modification, must only be used with a
   *    Nordic Semiconductor ASA integrated circuit.
   *
   * 5. Any software provided in binary form under this license must not be reverse
   *    engineered, decompiled, modified and/or disassembled.
   *
   * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
   * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
   * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   */
  #include "sdk_common.h"
  #if NRF_MODULE_ENABLED(APP_USBD_DUMMY)
  
  #include <string.h>
  #include <ctype.h>
  #include "app_usbd.h"
  #include "app_usbd_dummy.h"
  #include "app_usbd_string_desc.h"
  #include "nrf_gpio.h"
  
  /**
   * @defgroup app_usbd_dummy_internal USBD Dummy internals
   * @{
   * @ingroup app_usbd_dummy
   * @internal
   */
  
  #define NRF_LOG_MODULE_NAME usbd_dummy
  
  #if APP_USBD_DUMMY_CONFIG_LOG_ENABLED
  #define NRF_LOG_LEVEL       APP_USBD_DUMMY_CONFIG_LOG_LEVEL
  #define NRF_LOG_INFO_COLOR  APP_USBD_DUMMY_CONFIG_INFO_COLOR
  #define NRF_LOG_DEBUG_COLOR APP_USBD_DUMMY_CONFIG_DEBUG_COLOR
  #else //APP_USBD_DUMMY_CONFIG_LOG_ENABLED
  #define NRF_LOG_LEVEL       0
  #endif //APP_USBD_DUMMY_CONFIG_LOG_ENABLED
  #include "nrf_log.h"
  NRF_LOG_MODULE_REGISTER();
  
  /** @brief @ref app_usbd_class_methods_t::event_handler */
  static ret_code_t dummy_class_event_handler(app_usbd_class_inst_t const *  p_inst,
                                              app_usbd_complex_evt_t const * p_event)
  {
      if((p_event->app_evt.type  == APP_USBD_EVT_INST_APPEND) || 
         (p_event->app_evt.type  == APP_USBD_EVT_INST_REMOVE))
      {
          return NRF_SUCCESS;
      }
      else
      {
          return NRF_ERROR_NOT_SUPPORTED;
      }
  }
  
  /** @brief @ref app_usbd_class_methods_t::feed_descriptors */
  static bool dummy_class_feed_descriptors(app_usbd_class_descriptor_ctx_t * p_ctx,
                                           app_usbd_class_inst_t const     * p_inst,
                                           uint8_t                         * p_buff,
                                           size_t                            max_size)
  {
      static app_usbd_class_iface_conf_t const * p_cur_iface = 0;
      p_cur_iface = app_usbd_class_iface_get(p_inst, 0);
  
      APP_USBD_CLASS_DESCRIPTOR_BEGIN(p_ctx, p_buff, max_size)
  
      /* INTERFACE DESCRIPTOR */
      APP_USBD_CLASS_DESCRIPTOR_WRITE(sizeof(app_usbd_descriptor_iface_t)); // bLength
      APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DESCRIPTOR_INTERFACE); // bDescriptorType
      APP_USBD_CLASS_DESCRIPTOR_WRITE(app_usbd_class_iface_number_get(p_cur_iface)); // bInterfaceNumber
      APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bAlternateSetting
      APP_USBD_CLASS_DESCRIPTOR_WRITE(0); // bNumEndpoints
      APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DUMMY_CLASS); // bInterfaceClass
      APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DUMMY_SUBCLASS); // bInterfaceSubClass
      APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DUMMY_PROTOCOL); // bInterfaceProtocol
      APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // iInterface
  
      APP_USBD_CLASS_DESCRIPTOR_END();
  }
  
  const app_usbd_class_methods_t app_usbd_dummy_class_methods = {
      .event_handler    = dummy_class_event_handler,
      .feed_descriptors = dummy_class_feed_descriptors,
  };
  
  
  #endif //NRF_MODULE_ENABLED(APP_USBD_DUMMY)
  