text: /* 
   * The MIT License (MIT)
   *
   * Copyright (c) 2019 Ha Thach (tinyusb.org)
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   *
   * This file is part of the TinyUSB stack.
   */
  
  /** \ingroup group_usbd
   *  @{ */
  
  #ifndef _TUSB_USBD_H_
  #define _TUSB_USBD_H_
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #include "common/tusb_common.h"
  
  //--------------------------------------------------------------------+
  // Application API
  //--------------------------------------------------------------------+
  
  // Init device stack
  bool tud_init (void);
  
  // Task function should be called in main/rtos loop
  void tud_task (void);
  
  // Check if there is pending events need proccessing by tud_task()
  bool tud_task_event_ready(void);
  
  // Interrupt handler, name alias to DCD
  extern void dcd_int_handler(uint8_t rhport);
  #define tud_int_handler   dcd_int_handler
  
  // Get current bus speed
  tusb_speed_t tud_speed_get(void);
  
  // Check if device is connected (may not mounted/configured yet)
  // True if just got out of Bus Reset and received the very first data from host
  bool tud_connected(void);
  
  // Check if device is connected and configured
  bool tud_mounted(void);
  
  // Check if device is suspended
  bool tud_suspended(void);
  
  // Check if device is ready to transfer
  static inline bool tud_ready(void)
  {
    return tud_mounted() && !tud_suspended();
  }
  
  // Remote wake up host, only if suspended and enabled by host
  bool tud_remote_wakeup(void);
  
  // Enable pull-up resistor on D+ D-
  // Return false on unsupported MCUs
  bool tud_disconnect(void);
  
  // Disable pull-up resistor on D+ D-
  // Return false on unsupported MCUs
  bool tud_connect(void);
  
  // Carry out Data and Status stage of control transfer
  // - If len = 0, it is equivalent to sending status only
  // - If len > wLength : it will be truncated
  bool tud_control_xfer(uint8_t rhport, tusb_control_request_t const * request, void* buffer, uint16_t len);
  
  // Send STATUS (zero length) packet
  bool tud_control_status(uint8_t rhport, tusb_control_request_t const * request);
  
  //--------------------------------------------------------------------+
  // Application Callbacks (WEAK is optional)
  //--------------------------------------------------------------------+
  
  // Invoked when received GET DEVICE DESCRIPTOR request
  // Application return pointer to descriptor
  uint8_t const * tud_descriptor_device_cb(void);
  
  // Invoked when received GET BOS DESCRIPTOR request
  // Application return pointer to descriptor
  TU_ATTR_WEAK uint8_t const * tud_descriptor_bos_cb(void);
  
  // Invoked when received GET CONFIGURATION DESCRIPTOR request
  // Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
  uint8_t const * tud_descriptor_configuration_cb(uint8_t index);
  
  // Invoked when received GET STRING DESCRIPTOR request
  // Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
  uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid);
  
  // Invoked when received GET DEVICE QUALIFIER DESCRIPTOR request
  // Application return pointer to descriptor, whose contents must exist long enough for transfer to complete
  TU_ATTR_WEAK uint8_t const* tud_descriptor_device_qualifier_cb(void);
  
  // Invoked when device is mounted (configured)
  TU_ATTR_WEAK void tud_mount_cb(void);
  
  // Invoked when device is unmounted
  TU_ATTR_WEAK void tud_umount_cb(void);
  
  // Invoked when usb bus is suspended
  // Within 7ms, device must draw an average of current less than 2.5 mA from bus
  TU_ATTR_WEAK void tud_suspend_cb(bool remote_wakeup_en);
  
  // Invoked when usb bus is resumed
  TU_ATTR_WEAK void tud_resume_cb(void);
  
  // Invoked when received control request with VENDOR TYPE
  TU_ATTR_WEAK bool tud_vendor_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t const * request);
  
  //--------------------------------------------------------------------+
  // Binary Device Object Store (BOS) Descriptor Templates
  //--------------------------------------------------------------------+
  
  #define TUD_BOS_DESC_LEN      5
  
  // total length, number of device caps
  #define TUD_BOS_DESCRIPTOR(_total_len, _caps_num) \
    5, TUSB_DESC_BOS, U16_TO_U8S_LE(_total_len), _caps_num
  
  // Device Capability Platform 128-bit UUID + Data
  #define TUD_BOS_PLATFORM_DESCRIPTOR(...) \
    4+TU_ARGS_NUM(__VA_ARGS__), TUSB_DESC_DEVICE_CAPABILITY, DEVICE_CAPABILITY_PLATFORM, 0x00, __VA_ARGS__
  
  //------------- WebUSB BOS Platform -------------//
  
  // Descriptor Length
  #define TUD_BOS_WEBUSB_DESC_LEN         24
  
  // Vendor Code, iLandingPage
  #define TUD_BOS_WEBUSB_DESCRIPTOR(_vendor_code, _ipage) \
    TUD_BOS_PLATFORM_DESCRIPTOR(TUD_BOS_WEBUSB_UUID, U16_TO_U8S_LE(0x0100), _vendor_code, _ipage)
  
  #define TUD_BOS_WEBUSB_UUID   \
    0x38, 0xB6, 0x08, 0x34, 0xA9, 0x09, 0xA0, 0x47, \
    0x8B, 0xFD, 0xA0, 0x76, 0x88, 0x15, 0xB6, 0x65
  
  //------------- Microsoft OS 2.0 Platform -------------//
  #define TUD_BOS_MICROSOFT_OS_DESC_LEN   28
  
  // Total Length of descriptor set, vendor code
  #define TUD_BOS_MS_OS_20_DESCRIPTOR(_desc_set_len, _vendor_code) \
    TUD_BOS_PLATFORM_DESCRIPTOR(TUD_BOS_MS_OS_20_UUID, U32_TO_U8S_LE(0x06030000), U16_TO_U8S_LE(_desc_set_len), _vendor_code, 0)
  
  #define TUD_BOS_MS_OS_20_UUID \
      0xDF, 0x60, 0xDD, 0xD8, 0x89, 0x45, 0xC7, 0x4C, \
    0x9C, 0xD2, 0x65, 0x9D, 0x9E, 0x64, 0x8A, 0x9F
  
  //--------------------------------------------------------------------+
  // Configuration & Interface Descriptor Templates
  //--------------------------------------------------------------------+
  
  //------------- Configuration -------------//
  #define TUD_CONFIG_DESC_LEN   (9)
  
  // Config number, interface count, string index, total length, attribute, power in mA
  #define TUD_CONFIG_DESCRIPTOR(config_num, _itfcount, _stridx, _total_len, _attribute, _power_ma) \
    9, TUSB_DESC_CONFIGURATION, U16_TO_U8S_LE(_total_len), _itfcount, config_num, _stridx, TU_BIT(7) | _attribute, (_power_ma)/2
  
  //------------- CDC -------------//
  
  // Length of template descriptor: 66 bytes
  #define TUD_CDC_DESC_LEN  (8+9+5+5+4+5+7+9+7+7)
  
  // CDC Descriptor Template
  // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
  #define TUD_CDC_DESCRIPTOR(_itfnum, _stridx, _ep_notif, _ep_notif_size, _epout, _epin, _epsize) \
    /* Interface Associate */\
    8, TUSB_DESC_INTERFACE_ASSOCIATION, _itfnum, 2, TUSB_CLASS_CDC, CDC_COMM_SUBCLASS_ABSTRACT_CONTROL_MODEL, CDC_COMM_PROTOCOL_NONE, 0,\
    /* CDC Control Interface */\
    9, TUSB_DESC_INTERFACE, _itfnum, 0, 1, TUSB_CLASS_CDC, CDC_COMM_SUBCLASS_ABSTRACT_CONTROL_MODEL, CDC_COMM_PROTOCOL_NONE, _stridx,\
    /* CDC Header */\
    5, TUSB_DESC_CS_INTERFACE, CDC_FUNC_DESC_HEADER, U16_TO_U8S_LE(0x0120),\
    /* CDC Call */\
    5, TUSB_DESC_CS_INTERFACE, CDC_FUNC_DESC_CALL_MANAGEMENT, 0, (uint8_t)((_itfnum) + 1),\
    /* CDC ACM: support line request */\
    4, TUSB_DESC_CS_INTERFACE, CDC_FUNC_DESC_ABSTRACT_CONTROL_MANAGEMENT, 2,\
    /* CDC Union */\
    5, TUSB_DESC_CS_INTERFACE, CDC_FUNC_DESC_UNION, _itfnum, (uint8_t)((_itfnum) + 1),\
    /* Endpoint Notification */\
    7, TUSB_DESC_ENDPOINT, _ep_notif, TUSB_XFER_INTERRUPT, U16_TO_U8S_LE(_ep_notif_size), 16,\
    /* CDC Data Interface */\
    9, TUSB_DESC_INTERFACE, (uint8_t)((_itfnum)+1), 0, 2, TUSB_CLASS_CDC_DATA, 0, 0, 0,\
    /* Endpoint Out */\
    7, TUSB_DESC_ENDPOINT, _epout, TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0,\
    /* Endpoint In */\
    7, TUSB_DESC_ENDPOINT, _epin, TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0
  
  //------------- MSC -------------//
  
  // Length of template descriptor: 23 bytes
  #define TUD_MSC_DESC_LEN    (9 + 7 + 7)
  
  // Interface number, string index, EP Out & EP In address, EP size
  #define TUD_MSC_DESCRIPTOR(_itfnum, _stridx, _epout, _epin, _epsize) \
    /* Interface */\
    9, TUSB_DESC_INTERFACE, _itfnum, 0, 2, TUSB_CLASS_MSC, MSC_SUBCLASS_SCSI, MSC_PROTOCOL_BOT, _stridx,\
    /* Endpoint Out */\
    7, TUSB_DESC_ENDPOINT, _epout, TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0,\
    /* Endpoint In */\
    7, TUSB_DESC_ENDPOINT, _epin, TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0
  
  //------------- HID -------------//
  
  // Length of template descriptor: 25 bytes
  #define TUD_HID_DESC_LEN    (9 + 9 + 7)
  
  // HID Input only descriptor
  // Interface number, string index, protocol, report descriptor len, EP In address, size & polling interval
  #define TUD_HID_DESCRIPTOR(_itfnum, _stridx, _boot_protocol, _report_desc_len, _epin, _epsize, _ep_interval) \
    /* Interface */\
    9, TUSB_DESC_INTERFACE, _itfnum, 0, 1, TUSB_CLASS_HID, (uint8_t)((_boot_protocol) ? HID_SUBCLASS_BOOT : 0), _boot_protocol, _stridx,\
    /* HID descriptor */\
    9, HID_DESC_TYPE_HID, U16_TO_U8S_LE(0x0111), 0, 1, HID_DESC_TYPE_REPORT, U16_TO_U8S_LE(_report_desc_len),\
    /* Endpoint In */\
    7, TUSB_DESC_ENDPOINT, _epin, TUSB_XFER_INTERRUPT, U16_TO_U8S_LE(_epsize), _ep_interval
  
  // Length of template descriptor: 32 bytes
  #define TUD_HID_INOUT_DESC_LEN    (9 + 9 + 7 + 7)
  
  // HID Input & Output descriptor
  // Interface number, string index, protocol, report descriptor len, EP OUT & IN address, size & polling interval
  #define TUD_HID_INOUT_DESCRIPTOR(_itfnum, _stridx, _boot_protocol, _report_desc_len, _epout, _epin, _epsize, _ep_interval) \
    /* Interface */\
    9, TUSB_DESC_INTERFACE, _itfnum, 0, 2, TUSB_CLASS_HID, (uint8_t)((_boot_protocol) ? HID_SUBCLASS_BOOT : 0), _boot_protocol, _stridx,\
    /* HID descriptor */\
    9, HID_DESC_TYPE_HID, U16_TO_U8S_LE(0x0111), 0, 1, HID_DESC_TYPE_REPORT, U16_TO_U8S_LE(_report_desc_len),\
    /* Endpoint Out */\
    7, TUSB_DESC_ENDPOINT, _epout, TUSB_XFER_INTERRUPT, U16_TO_U8S_LE(_epsize), _ep_interval, \
    /* Endpoint In */\
    7, TUSB_DESC_ENDPOINT, _epin, TUSB_XFER_INTERRUPT, U16_TO_U8S_LE(_epsize), _ep_interval
  
  //------------- MIDI -------------//
  // MIDI v1.0 is based on Audio v1.0
  
  #define TUD_MIDI_DESC_HEAD_LEN (9 + 9 + 9 + 7)
  #define TUD_MIDI_DESC_HEAD(_itfnum,  _stridx, _numcables) \
    /* Audio Control (AC) Interface */\
    9, TUSB_DESC_INTERFACE, _itfnum, 0, 0, TUSB_CLASS_AUDIO, AUDIO_SUBCLASS_CONTROL, AUDIO_FUNC_PROTOCOL_CODE_UNDEF, _stridx,\
    /* AC Header */\
    9, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_HEADER, U16_TO_U8S_LE(0x0100), U16_TO_U8S_LE(0x0009), 1, (uint8_t)((_itfnum) + 1),\
    /* MIDI Streaming (MS) Interface */\
    9, TUSB_DESC_INTERFACE, (uint8_t)((_itfnum) + 1), 0, 2, TUSB_CLASS_AUDIO, AUDIO_SUBCLASS_MIDI_STREAMING, AUDIO_FUNC_PROTOCOL_CODE_UNDEF, 0,\
    /* MS Header */\
    7, TUSB_DESC_CS_INTERFACE, MIDI_CS_INTERFACE_HEADER, U16_TO_U8S_LE(0x0100), U16_TO_U8S_LE(7 + (_numcables) * TUD_MIDI_DESC_JACK_LEN)
  
  #define TUD_MIDI_JACKID_IN_EMB(_cablenum) \
    (uint8_t)(((_cablenum) - 1) * 4 + 1)
  
  #define TUD_MIDI_JACKID_IN_EXT(_cablenum) \
    (uint8_t)(((_cablenum) - 1) * 4 + 2)
  
  #define TUD_MIDI_JACKID_OUT_EMB(_cablenum) \
    (uint8_t)(((_cablenum) - 1) * 4 + 3)
  
  #define TUD_MIDI_JACKID_OUT_EXT(_cablenum) \
    (uint8_t)(((_cablenum) - 1) * 4 + 4)
  
  #define TUD_MIDI_DESC_JACK_LEN (6 + 6 + 9 + 9)
  #define TUD_MIDI_DESC_JACK(_cablenum) \
    /* MS In Jack (Embedded) */\
    6, TUSB_DESC_CS_INTERFACE, MIDI_CS_INTERFACE_IN_JACK, MIDI_JACK_EMBEDDED, TUD_MIDI_JACKID_IN_EMB(_cablenum), 0,\
    /* MS In Jack (External) */\
    6, TUSB_DESC_CS_INTERFACE, MIDI_CS_INTERFACE_IN_JACK, MIDI_JACK_EXTERNAL, TUD_MIDI_JACKID_IN_EXT(_cablenum), 0,\
    /* MS Out Jack (Embedded), connected to In Jack External */\
    9, TUSB_DESC_CS_INTERFACE, MIDI_CS_INTERFACE_OUT_JACK, MIDI_JACK_EMBEDDED, TUD_MIDI_JACKID_OUT_EMB(_cablenum), 1, TUD_MIDI_JACKID_IN_EXT(_cablenum), 1, 0,\
    /* MS Out Jack (External), connected to In Jack Embedded */\
    9, TUSB_DESC_CS_INTERFACE, MIDI_CS_INTERFACE_OUT_JACK, MIDI_JACK_EXTERNAL, TUD_MIDI_JACKID_OUT_EXT(_cablenum), 1, TUD_MIDI_JACKID_IN_EMB(_cablenum), 1, 0
  
  #define TUD_MIDI_DESC_EP_LEN(_numcables) (9 + 4 + (_numcables))
  #define TUD_MIDI_DESC_EP(_epout, _epsize, _numcables) \
    /* Endpoint: Note Audio v1.0's endpoint has 9 bytes instead of 7 */\
    9, TUSB_DESC_ENDPOINT, _epout, TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0, 0, 0, \
    /* MS Endpoint (connected to embedded jack) */\
    (uint8_t)(4 + (_numcables)), TUSB_DESC_CS_ENDPOINT, MIDI_CS_ENDPOINT_GENERAL, _numcables
  
  // Length of template descriptor (88 bytes)
  #define TUD_MIDI_DESC_LEN (TUD_MIDI_DESC_HEAD_LEN + TUD_MIDI_DESC_JACK_LEN + TUD_MIDI_DESC_EP_LEN(1) * 2)
  
  // MIDI simple descriptor
  // - 1 Embedded Jack In connected to 1 External Jack Out
  // - 1 Embedded Jack out connected to 1 External Jack In
  #define TUD_MIDI_DESCRIPTOR(_itfnum, _stridx, _epout, _epin, _epsize) \
    TUD_MIDI_DESC_HEAD(_itfnum, _stridx, 1),\
    TUD_MIDI_DESC_JACK(1),\
    TUD_MIDI_DESC_EP(_epout, _epsize, 1),\
    TUD_MIDI_JACKID_IN_EMB(1),\
    TUD_MIDI_DESC_EP(_epin, _epsize, 1),\
    TUD_MIDI_JACKID_OUT_EMB(1)
  
  //------------- AUDIO -------------//
  
  /* Standard Interface Association Descriptor (IAD) */
  #define TUD_AUDIO_DESC_IAD_LEN 8
  #define TUD_AUDIO_DESC_IAD(_firstitfs, _nitfs, _stridx) \
    TUD_AUDIO_DESC_IAD_LEN, TUSB_DESC_INTERFACE_ASSOCIATION, _firstitfs, _nitfs, TUSB_CLASS_AUDIO, AUDIO_FUNCTION_SUBCLASS_UNDEFINED, AUDIO_FUNC_PROTOCOL_CODE_V2, _stridx
  
  /* Standard AC Interface Descriptor(4.7.1) */
  #define TUD_AUDIO_DESC_STD_AC_LEN 9
  #define TUD_AUDIO_DESC_STD_AC(_itfnum, _nEPs, _stridx) /* _nEPs is 0 or 1 */\
    TUD_AUDIO_DESC_STD_AC_LEN, TUSB_DESC_INTERFACE, _itfnum, /* fixed to zero */ 0x00, _nEPs, TUSB_CLASS_AUDIO, AUDIO_SUBCLASS_CONTROL, AUDIO_INT_PROTOCOL_CODE_V2, _stridx
  
  /* Class-Specific AC Interface Header Descriptor(4.7.2) */
  #define TUD_AUDIO_DESC_CS_AC_LEN 9
  #define TUD_AUDIO_DESC_CS_AC(_bcdADC, _category, _totallen, _ctrl) /* _bcdADC : Audio Device Class Specification Release Number in Binary-Coded Decimal, _category : see audio_function_t, _totallen : Total number of bytes returned for the class-specific AudioControl interface i.e. Clock Source, Unit and Terminal descriptors - Do not include TUD_AUDIO_DESC_CS_AC_LEN, we already do this here*/ \
    TUD_AUDIO_DESC_CS_AC_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_HEADER, U16_TO_U8S_LE(_bcdADC), _category, U16_TO_U8S_LE(_totallen + TUD_AUDIO_DESC_CS_AC_LEN), _ctrl
  
  /* Clock Source Descriptor(4.7.2.1) */
  #define TUD_AUDIO_DESC_CLK_SRC_LEN 8
  #define TUD_AUDIO_DESC_CLK_SRC(_clkid, _attr, _ctrl, _assocTerm, _stridx) \
    TUD_AUDIO_DESC_CLK_SRC_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_CLOCK_SOURCE, _clkid, _attr, _ctrl, _assocTerm, _stridx
  
  /* Input Terminal Descriptor(4.7.2.4) */
  #define TUD_AUDIO_DESC_INPUT_TERM_LEN 17
  #define TUD_AUDIO_DESC_INPUT_TERM(_termid, _termtype, _assocTerm, _clkid, _nchannelslogical, _channelcfg, _idxchannelnames, _ctrl, _stridx) \
    TUD_AUDIO_DESC_INPUT_TERM_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_INPUT_TERMINAL, _termid, U16_TO_U8S_LE(_termtype), _assocTerm, _clkid, _nchannelslogical, U32_TO_U8S_LE(_channelcfg), _idxchannelnames, U16_TO_U8S_LE(_ctrl), _stridx
  
  /* Output Terminal Descriptor(4.7.2.5) */
  #define TUD_AUDIO_DESC_OUTPUT_TERM_LEN 12
  #define TUD_AUDIO_DESC_OUTPUT_TERM(_termid, _termtype, _assocTerm, _srcid, _clkid, _ctrl, _stridx) \
    TUD_AUDIO_DESC_OUTPUT_TERM_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_OUTPUT_TERMINAL, _termid, U16_TO_U8S_LE(_termtype), _assocTerm, _srcid, _clkid, U16_TO_U8S_LE(_ctrl), _stridx
  
  /* Feature Unit Descriptor(4.7.2.8) */
  // 1 - Channel
  #define TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL_LEN 6+(1+1)*4
  #define TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL(_unitid, _srcid, _ctrlch0master, _ctrlch1, _stridx) \
    TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_FEATURE_UNIT, _unitid, _srcid, U32_TO_U8S_LE(_ctrlch0master), U32_TO_U8S_LE(_ctrlch1), _stridx
  
  // 2 - Channels
  #define TUD_AUDIO_DESC_FEATURE_UNIT_TWO_CHANNEL_LEN (6+(2+1)*4)
  #define TUD_AUDIO_DESC_FEATURE_UNIT_TWO_CHANNEL(_unitid, _srcid, _ctrlch0master, _ctrlch1, _ctrlch2, _stridx) \
  		TUD_AUDIO_DESC_FEATURE_UNIT_TWO_CHANNEL_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_FEATURE_UNIT, _unitid, _srcid, U32_TO_U8S_LE(_ctrlch0master), U32_TO_U8S_LE(_ctrlch1), U32_TO_U8S_LE(_ctrlch2), _stridx
  // 4 - Channels
  #define TUD_AUDIO_DESC_FEATURE_UNIT_FOUR_CHANNEL_LEN (6+(4+1)*4)
  #define TUD_AUDIO_DESC_FEATURE_UNIT_FOUR_CHANNEL(_unitid, _srcid, _ctrlch0master, _ctrlch1, _ctrlch2, _ctrlch3, _ctrlch4, _stridx) \
                      TUD_AUDIO_DESC_FEATURE_UNIT_FOUR_CHANNEL_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AC_INTERFACE_FEATURE_UNIT, _unitid, _srcid, U32_TO_U8S_LE(_ctrlch0master), U32_TO_U8S_LE(_ctrlch1), U32_TO_U8S_LE(_ctrlch2), U32_TO_U8S_LE(_ctrlch3), U32_TO_U8S_LE(_ctrlch4), _stridx
  
  // For more channels, add definitions here
  
  /* Standard AS Interface Descriptor(4.9.1) */
  #define TUD_AUDIO_DESC_STD_AS_INT_LEN 9
  #define TUD_AUDIO_DESC_STD_AS_INT(_itfnum, _altset, _nEPs, _stridx) \
    TUD_AUDIO_DESC_STD_AS_INT_LEN, TUSB_DESC_INTERFACE, _itfnum, _altset, _nEPs, TUSB_CLASS_AUDIO, AUDIO_SUBCLASS_STREAMING, AUDIO_INT_PROTOCOL_CODE_V2, _stridx
  
  /* Class-Specific AS Interface Descriptor(4.9.2) */
  #define TUD_AUDIO_DESC_CS_AS_INT_LEN 16
  #define TUD_AUDIO_DESC_CS_AS_INT(_termid, _ctrl, _formattype, _formats, _nchannelsphysical, _channelcfg, _stridx) \
    TUD_AUDIO_DESC_CS_AS_INT_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AS_INTERFACE_AS_GENERAL, _termid, _ctrl, _formattype, U32_TO_U8S_LE(_formats), _nchannelsphysical, U32_TO_U8S_LE(_channelcfg), _stridx
  
  /* Type I Format Type Descriptor(2.3.1.6 - Audio Formats) */
  #define TUD_AUDIO_DESC_TYPE_I_FORMAT_LEN 6
  #define TUD_AUDIO_DESC_TYPE_I_FORMAT(_subslotsize, _bitresolution) /* _subslotsize is number of bytes per sample (i.e. subslot) and can be 1,2,3, or 4 */\
    TUD_AUDIO_DESC_TYPE_I_FORMAT_LEN, TUSB_DESC_CS_INTERFACE, AUDIO_CS_AS_INTERFACE_FORMAT_TYPE, AUDIO_FORMAT_TYPE_I, _subslotsize, _bitresolution
  
  /* Standard AS Isochronous Audio Data Endpoint Descriptor(4.10.1.1) */
  #define TUD_AUDIO_DESC_STD_AS_ISO_EP_LEN 7
  #define TUD_AUDIO_DESC_STD_AS_ISO_EP(_ep, _attr, _maxEPsize, _interval) \
    TUD_AUDIO_DESC_STD_AS_ISO_EP_LEN, TUSB_DESC_ENDPOINT, _ep, _attr, U16_TO_U8S_LE(_maxEPsize), _interval
  
  /* Class-Specific AS Isochronous Audio Data Endpoint Descriptor(4.10.1.2) */
  #define TUD_AUDIO_DESC_CS_AS_ISO_EP_LEN 8
  #define TUD_AUDIO_DESC_CS_AS_ISO_EP(_attr, _ctrl, _lockdelayunit, _lockdelay) \
    TUD_AUDIO_DESC_CS_AS_ISO_EP_LEN, TUSB_DESC_CS_ENDPOINT, AUDIO_CS_EP_SUBTYPE_GENERAL, _attr, _ctrl, _lockdelayunit, U16_TO_U8S_LE(_lockdelay)
  
  /* Standard AS Isochronous Feedback Endpoint Descriptor(4.10.2.1) */
  #define TUD_AUDIO_DESC_STD_AS_ISO_FB_EP_LEN 7
  #define TUD_AUDIO_DESC_STD_AS_ISO_FB_EP(_ep, _interval) \
    TUD_AUDIO_DESC_STD_AS_ISO_FB_EP_LEN, TUSB_DESC_ENDPOINT, _ep, (TUSB_XFER_ISOCHRONOUS | TUSB_ISO_EP_ATT_NO_SYNC | TUSB_ISO_EP_ATT_EXPLICIT_FB), U16_TO_U8S_LE(4), _interval
  
  // AUDIO simple descriptor (UAC2) for 1 microphone input
  // - 1 Input Terminal, 1 Feature Unit (Mute and Volume Control), 1 Output Terminal, 1 Clock Source
  
  #define TUD_AUDIO_MIC_ONE_CH_DESC_LEN (TUD_AUDIO_DESC_IAD_LEN\
    + TUD_AUDIO_DESC_STD_AC_LEN\
    + TUD_AUDIO_DESC_CS_AC_LEN\
    + TUD_AUDIO_DESC_CLK_SRC_LEN\
    + TUD_AUDIO_DESC_INPUT_TERM_LEN\
    + TUD_AUDIO_DESC_OUTPUT_TERM_LEN\
    + TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL_LEN\
    + TUD_AUDIO_DESC_STD_AS_INT_LEN\
    + TUD_AUDIO_DESC_STD_AS_INT_LEN\
    + TUD_AUDIO_DESC_CS_AS_INT_LEN\
    + TUD_AUDIO_DESC_TYPE_I_FORMAT_LEN\
    + TUD_AUDIO_DESC_STD_AS_ISO_EP_LEN\
    + TUD_AUDIO_DESC_CS_AS_ISO_EP_LEN)
  
  #define TUD_AUDIO_MIC_ONE_CH_DESC_N_AS_INT 1 	// Number of AS interfaces
  
  #define TUD_AUDIO_MIC_ONE_CH_DESCRIPTOR(_itfnum, _stridx, _nBytesPerSample, _nBitsUsedPerSample, _epin, _epsize) \
    /* Standard Interface Association Descriptor (IAD) */\
    TUD_AUDIO_DESC_IAD(/*_firstitfs*/ _itfnum, /*_nitfs*/ 0x02, /*_stridx*/ 0x00),\
    /* Standard AC Interface Descriptor(4.7.1) */\
    TUD_AUDIO_DESC_STD_AC(/*_itfnum*/ _itfnum, /*_nEPs*/ 0x00, /*_stridx*/ _stridx),\
    /* Class-Specific AC Interface Header Descriptor(4.7.2) */\
    TUD_AUDIO_DESC_CS_AC(/*_bcdADC*/ 0x0200, /*_category*/ AUDIO_FUNC_MICROPHONE, /*_totallen*/ TUD_AUDIO_DESC_CLK_SRC_LEN+TUD_AUDIO_DESC_INPUT_TERM_LEN+TUD_AUDIO_DESC_OUTPUT_TERM_LEN+TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL_LEN, /*_ctrl*/ AUDIO_CS_AS_INTERFACE_CTRL_LATENCY_POS),\
    /* Clock Source Descriptor(4.7.2.1) */\
    TUD_AUDIO_DESC_CLK_SRC(/*_clkid*/ 0x04, /*_attr*/ AUDIO_CLOCK_SOURCE_ATT_INT_FIX_CLK, /*_ctrl*/ (AUDIO_CTRL_R << AUDIO_CLOCK_SOURCE_CTRL_CLK_FRQ_POS), /*_assocTerm*/ 0x01,  /*_stridx*/ 0x00),\
    /* Input Terminal Descriptor(4.7.2.4) */\
    TUD_AUDIO_DESC_INPUT_TERM(/*_termid*/ 0x01, /*_termtype*/ AUDIO_TERM_TYPE_IN_GENERIC_MIC, /*_assocTerm*/ 0x03, /*_clkid*/ 0x04, /*_nchannelslogical*/ 0x01, /*_channelcfg*/ AUDIO_CHANNEL_CONFIG_NON_PREDEFINED, /*_idxchannelnames*/ 0x00, /*_ctrl*/ AUDIO_CTRL_R << AUDIO_IN_TERM_CTRL_CONNECTOR_POS, /*_stridx*/ 0x00),\
    /* Output Terminal Descriptor(4.7.2.5) */\
    TUD_AUDIO_DESC_OUTPUT_TERM(/*_termid*/ 0x03, /*_termtype*/ AUDIO_TERM_TYPE_USB_STREAMING, /*_assocTerm*/ 0x01, /*_srcid*/ 0x02, /*_clkid*/ 0x04, /*_ctrl*/ 0x0000, /*_stridx*/ 0x00),\
    /* Feature Unit Descriptor(4.7.2.8) */\
    TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL(/*_unitid*/ 0x02, /*_srcid*/ 0x01, /*_ctrlch0master*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch1*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_stridx*/ 0x00),\
    /* Standard AS Interface Descriptor(4.9.1) */\
    /* Interface 1, Alternate 0 - default alternate setting with 0 bandwidth */\
    TUD_AUDIO_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum)+1), /*_altset*/ 0x00, /*_nEPs*/ 0x00, /*_stridx*/ 0x00),\
    /* Standard AS Interface Descriptor(4.9.1) */\
    /* Interface 1, Alternate 1 - alternate interface for data streaming */\
    TUD_AUDIO_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum)+1), /*_altset*/ 0x01, /*_nEPs*/ 0x01, /*_stridx*/ 0x00),\
    /* Class-Specific AS Interface Descriptor(4.9.2) */\
    TUD_AUDIO_DESC_CS_AS_INT(/*_termid*/ 0x03, /*_ctrl*/ AUDIO_CTRL_NONE, /*_formattype*/ AUDIO_FORMAT_TYPE_I, /*_formats*/ AUDIO_DATA_FORMAT_TYPE_I_PCM, /*_nchannelsphysical*/ 0x01, /*_channelcfg*/ AUDIO_CHANNEL_CONFIG_NON_PREDEFINED, /*_stridx*/ 0x00),\
    /* Type I Format Type Descriptor(2.3.1.6 - Audio Formats) */\
    TUD_AUDIO_DESC_TYPE_I_FORMAT(_nBytesPerSample, _nBitsUsedPerSample),\
    /* Standard AS Isochronous Audio Data Endpoint Descriptor(4.10.1.1) */\
    TUD_AUDIO_DESC_STD_AS_ISO_EP(/*_ep*/ _epin, /*_attr*/ (TUSB_XFER_ISOCHRONOUS | TUSB_ISO_EP_ATT_ASYNCHRONOUS | TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ _epsize, /*_interval*/ (CFG_TUSB_RHPORT0_MODE & OPT_MODE_HIGH_SPEED) ? 0x04 : 0x01),\
    /* Class-Specific AS Isochronous Audio Data Endpoint Descriptor(4.10.1.2) */\
    TUD_AUDIO_DESC_CS_AS_ISO_EP(/*_attr*/ AUDIO_CS_AS_ISO_DATA_EP_ATT_NON_MAX_PACKETS_OK, /*_ctrl*/ AUDIO_CTRL_NONE, /*_lockdelayunit*/ AUDIO_CS_AS_ISO_DATA_EP_LOCK_DELAY_UNIT_UNDEFINED, /*_lockdelay*/ 0x0000)
  
  // AUDIO simple descriptor (UAC2) for 4 microphone input
  // - 1 Input Terminal, 1 Feature Unit (Mute and Volume Control), 1 Output Terminal, 1 Clock Source
  
  #define TUD_AUDIO_MIC_FOUR_CH_DESC_LEN (TUD_AUDIO_DESC_IAD_LEN\
    + TUD_AUDIO_DESC_STD_AC_LEN\
    + TUD_AUDIO_DESC_CS_AC_LEN\
    + TUD_AUDIO_DESC_CLK_SRC_LEN\
    + TUD_AUDIO_DESC_INPUT_TERM_LEN\
    + TUD_AUDIO_DESC_OUTPUT_TERM_LEN\
    + TUD_AUDIO_DESC_FEATURE_UNIT_FOUR_CHANNEL_LEN\
    + TUD_AUDIO_DESC_STD_AS_INT_LEN\
    + TUD_AUDIO_DESC_STD_AS_INT_LEN\
    + TUD_AUDIO_DESC_CS_AS_INT_LEN\
    + TUD_AUDIO_DESC_TYPE_I_FORMAT_LEN\
    + TUD_AUDIO_DESC_STD_AS_ISO_EP_LEN\
    + TUD_AUDIO_DESC_CS_AS_ISO_EP_LEN)
  
  #define TUD_AUDIO_MIC_FOUR_CH_DESC_N_AS_INT 1   // Number of AS interfaces
  
  #define TUD_AUDIO_MIC_FOUR_CH_DESCRIPTOR(_itfnum, _stridx, _nBytesPerSample, _nBitsUsedPerSample, _epin, _epsize) \
    /* Standard Interface Association Descriptor (IAD) */\
    TUD_AUDIO_DESC_IAD(/*_firstitfs*/ _itfnum, /*_nitfs*/ 0x02, /*_stridx*/ 0x00),\
    /* Standard AC Interface Descriptor(4.7.1) */\
    TUD_AUDIO_DESC_STD_AC(/*_itfnum*/ _itfnum, /*_nEPs*/ 0x00, /*_stridx*/ _stridx),\
    /* Class-Specific AC Interface Header Descriptor(4.7.2) */\
    TUD_AUDIO_DESC_CS_AC(/*_bcdADC*/ 0x0200, /*_category*/ AUDIO_FUNC_MICROPHONE, /*_totallen*/ TUD_AUDIO_DESC_CLK_SRC_LEN+TUD_AUDIO_DESC_INPUT_TERM_LEN+TUD_AUDIO_DESC_OUTPUT_TERM_LEN+TUD_AUDIO_DESC_FEATURE_UNIT_FOUR_CHANNEL_LEN, /*_ctrl*/ AUDIO_CS_AS_INTERFACE_CTRL_LATENCY_POS),\
    /* Clock Source Descriptor(4.7.2.1) */\
    TUD_AUDIO_DESC_CLK_SRC(/*_clkid*/ 0x04, /*_attr*/ AUDIO_CLOCK_SOURCE_ATT_INT_FIX_CLK, /*_ctrl*/ (AUDIO_CTRL_R << AUDIO_CLOCK_SOURCE_CTRL_CLK_FRQ_POS), /*_assocTerm*/ 0x01,  /*_stridx*/ 0x00),\
    /* Input Terminal Descriptor(4.7.2.4) */\
    TUD_AUDIO_DESC_INPUT_TERM(/*_termid*/ 0x01, /*_termtype*/ AUDIO_TERM_TYPE_IN_GENERIC_MIC, /*_assocTerm*/ 0x03, /*_clkid*/ 0x04, /*_nchannelslogical*/ 0x04, /*_channelcfg*/ AUDIO_CHANNEL_CONFIG_NON_PREDEFINED, /*_idxchannelnames*/ 0x00, /*_ctrl*/ AUDIO_CTRL_R << AUDIO_IN_TERM_CTRL_CONNECTOR_POS, /*_stridx*/ 0x00),\
    /* Output Terminal Descriptor(4.7.2.5) */\
    TUD_AUDIO_DESC_OUTPUT_TERM(/*_termid*/ 0x03, /*_termtype*/ AUDIO_TERM_TYPE_USB_STREAMING, /*_assocTerm*/ 0x01, /*_srcid*/ 0x02, /*_clkid*/ 0x04, /*_ctrl*/ 0x0000, /*_stridx*/ 0x00),\
    /* Feature Unit Descriptor(4.7.2.8) */\
    TUD_AUDIO_DESC_FEATURE_UNIT_FOUR_CHANNEL(/*_unitid*/ 0x02, /*_srcid*/ 0x01, /*_ctrlch0master*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch1*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch2*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch3*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_ctrlch4*/ AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS, /*_stridx*/ 0x00),\
    /* Standard AS Interface Descriptor(4.9.1) */\
    /* Interface 1, Alternate 0 - default alternate setting with 0 bandwidth */\
    TUD_AUDIO_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum)+1), /*_altset*/ 0x00, /*_nEPs*/ 0x00, /*_stridx*/ 0x00),\
    /* Standard AS Interface Descriptor(4.9.1) */\
    /* Interface 1, Alternate 1 - alternate interface for data streaming */\
    TUD_AUDIO_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum)+1), /*_altset*/ 0x01, /*_nEPs*/ 0x01, /*_stridx*/ 0x00),\
    /* Class-Specific AS Interface Descriptor(4.9.2) */\
    TUD_AUDIO_DESC_CS_AS_INT(/*_termid*/ 0x03, /*_ctrl*/ AUDIO_CTRL_NONE, /*_formattype*/ AUDIO_FORMAT_TYPE_I, /*_formats*/ AUDIO_DATA_FORMAT_TYPE_I_PCM, /*_nchannelsphysical*/ 0x04, /*_channelcfg*/ AUDIO_CHANNEL_CONFIG_NON_PREDEFINED, /*_stridx*/ 0x00),\
    /* Type I Format Type Descriptor(2.3.1.6 - Audio Formats) */\
    TUD_AUDIO_DESC_TYPE_I_FORMAT(_nBytesPerSample, _nBitsUsedPerSample),\
    /* Standard AS Isochronous Audio Data Endpoint Descriptor(4.10.1.1) */\
    TUD_AUDIO_DESC_STD_AS_ISO_EP(/*_ep*/ _epin, /*_attr*/ (TUSB_XFER_ISOCHRONOUS | TUSB_ISO_EP_ATT_ASYNCHRONOUS | TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ _epsize, /*_interval*/ (CFG_TUSB_RHPORT0_MODE & OPT_MODE_HIGH_SPEED) ? 0x04 : 0x01),\
    /* Class-Specific AS Isochronous Audio Data Endpoint Descriptor(4.10.1.2) */\
    TUD_AUDIO_DESC_CS_AS_ISO_EP(/*_attr*/ AUDIO_CS_AS_ISO_DATA_EP_ATT_NON_MAX_PACKETS_OK, /*_ctrl*/ AUDIO_CTRL_NONE, /*_lockdelayunit*/ AUDIO_CS_AS_ISO_DATA_EP_LOCK_DELAY_UNIT_UNDEFINED, /*_lockdelay*/ 0x0000)
  
  // AUDIO simple descriptor (UAC2) for mono speaker
  // - 1 Input Terminal, 2 Feature Unit (Mute and Volume Control), 3 Output Terminal, 4 Clock Source
  
  #define TUD_AUDIO_SPEAKER_MONO_FB_DESC_LEN (TUD_AUDIO_DESC_IAD_LEN\
    + TUD_AUDIO_DESC_STD_AC_LEN\
    + TUD_AUDIO_DESC_CS_AC_LEN\
    + TUD_AUDIO_DESC_CLK_SRC_LEN\
    + TUD_AUDIO_DESC_INPUT_TERM_LEN\
    + TUD_AUDIO_DESC_OUTPUT_TERM_LEN\
    + TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL_LEN\
    + TUD_AUDIO_DESC_STD_AS_INT_LEN\
    + TUD_AUDIO_DESC_STD_AS_INT_LEN\
    + TUD_AUDIO_DESC_CS_AS_INT_LEN\
    + TUD_AUDIO_DESC_TYPE_I_FORMAT_LEN\
    + TUD_AUDIO_DESC_STD_AS_ISO_EP_LEN\
    + TUD_AUDIO_DESC_CS_AS_ISO_EP_LEN\
    + TUD_AUDIO_DESC_STD_AS_ISO_FB_EP_LEN)
  
  #define TUD_AUDIO_SPEAKER_MONO_FB_DESCRIPTOR(_itfnum, _stridx, _nBytesPerSample, _nBitsUsedPerSample, _epout, _epsize, _epfb) \
    /* Standard Interface Association Descriptor (IAD) */\
    TUD_AUDIO_DESC_IAD(/*_firstitfs*/ _itfnum, /*_nitfs*/ 0x02, /*_stridx*/ 0x00),\
    /* Standard AC Interface Descriptor(4.7.1) */\
    TUD_AUDIO_DESC_STD_AC(/*_itfnum*/ _itfnum, /*_nEPs*/ 0x00, /*_stridx*/ _stridx),\
    /* Class-Specific AC Interface Header Descriptor(4.7.2) */\
    TUD_AUDIO_DESC_CS_AC(/*_bcdADC*/ 0x0200, /*_category*/ AUDIO_FUNC_DESKTOP_SPEAKER, /*_totallen*/ TUD_AUDIO_DESC_CLK_SRC_LEN+TUD_AUDIO_DESC_INPUT_TERM_LEN+TUD_AUDIO_DESC_OUTPUT_TERM_LEN+TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL_LEN, /*_ctrl*/ AUDIO_CS_AS_INTERFACE_CTRL_LATENCY_POS),\
    /* Clock Source Descriptor(4.7.2.1) */\
    TUD_AUDIO_DESC_CLK_SRC(/*_clkid*/ 0x04, /*_attr*/ AUDIO_CLOCK_SOURCE_ATT_INT_FIX_CLK, /*_ctrl*/ (AUDIO_CTRL_R << AUDIO_CLOCK_SOURCE_CTRL_CLK_FRQ_POS), /*_assocTerm*/ 0x01,  /*_stridx*/ 0x00),\
    /* Input Terminal Descriptor(4.7.2.4) */\
    TUD_AUDIO_DESC_INPUT_TERM(/*_termid*/ 0x01, /*_termtype*/ AUDIO_TERM_TYPE_USB_STREAMING, /*_assocTerm*/ 0x00, /*_clkid*/ 0x04, /*_nchannelslogical*/ 0x01, /*_channelcfg*/ AUDIO_CHANNEL_CONFIG_NON_PREDEFINED, /*_idxchannelnames*/ 0x00, /*_ctrl*/ 0 * (AUDIO_CTRL_R << AUDIO_IN_TERM_CTRL_CONNECTOR_POS), /*_stridx*/ 0x00),\
    /* Output Terminal Descriptor(4.7.2.5) */\
    TUD_AUDIO_DESC_OUTPUT_TERM(/*_termid*/ 0x03, /*_termtype*/ AUDIO_TERM_TYPE_OUT_DESKTOP_SPEAKER, /*_assocTerm*/ 0x01, /*_srcid*/ 0x02, /*_clkid*/ 0x04, /*_ctrl*/ 0x0000, /*_stridx*/ 0x00),\
    /* Feature Unit Descriptor(4.7.2.8) */\
    TUD_AUDIO_DESC_FEATURE_UNIT_ONE_CHANNEL(/*_unitid*/ 0x02, /*_srcid*/ 0x01, /*_ctrlch0master*/ 0 * (AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS), /*_ctrlch1*/ 0 * (AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_MUTE_POS | AUDIO_CTRL_RW << AUDIO_FEATURE_UNIT_CTRL_VOLUME_POS), /*_stridx*/ 0x00),\
    /* Standard AS Interface Descriptor(4.9.1) */\
    /* Interface 1, Alternate 0 - default alternate setting with 0 bandwidth */\
    TUD_AUDIO_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum) + 1), /*_altset*/ 0x00, /*_nEPs*/ 0x00, /*_stridx*/ 0x00),\
    /* Standard AS Interface Descriptor(4.9.1) */\
    /* Interface 1, Alternate 1 - alternate interface for data streaming */\
    TUD_AUDIO_DESC_STD_AS_INT(/*_itfnum*/ (uint8_t)((_itfnum) + 1), /*_altset*/ 0x01, /*_nEPs*/ 0x02, /*_stridx*/ 0x00),\
    /* Class-Specific AS Interface Descriptor(4.9.2) */\
    TUD_AUDIO_DESC_CS_AS_INT(/*_termid*/ 0x01, /*_ctrl*/ AUDIO_CTRL_NONE, /*_formattype*/ AUDIO_FORMAT_TYPE_I, /*_formats*/ AUDIO_DATA_FORMAT_TYPE_I_PCM, /*_nchannelsphysical*/ 0x01, /*_channelcfg*/ AUDIO_CHANNEL_CONFIG_NON_PREDEFINED, /*_stridx*/ 0x00),\
    /* Type I Format Type Descriptor(2.3.1.6 - Audio Formats) */\
    TUD_AUDIO_DESC_TYPE_I_FORMAT(_nBytesPerSample, _nBitsUsedPerSample),\
    /* Standard AS Isochronous Audio Data Endpoint Descriptor(4.10.1.1) */\
    TUD_AUDIO_DESC_STD_AS_ISO_EP(/*_ep*/ _epout, /*_attr*/ (TUSB_XFER_ISOCHRONOUS | TUSB_ISO_EP_ATT_ASYNCHRONOUS | TUSB_ISO_EP_ATT_DATA), /*_maxEPsize*/ _epsize, /*_interval*/ (CFG_TUSB_RHPORT0_MODE & OPT_MODE_HIGH_SPEED) ? 0x04 : 0x01),\
    /* Class-Specific AS Isochronous Audio Data Endpoint Descriptor(4.10.1.2) */\
    TUD_AUDIO_DESC_CS_AS_ISO_EP(/*_attr*/ AUDIO_CS_AS_ISO_DATA_EP_ATT_NON_MAX_PACKETS_OK, /*_ctrl*/ AUDIO_CTRL_NONE, /*_lockdelayunit*/ AUDIO_CS_AS_ISO_DATA_EP_LOCK_DELAY_UNIT_UNDEFINED, /*_lockdelay*/ 0x0000),\
    /* Standard AS Isochronous Feedback Endpoint Descriptor(4.10.2.1) */\
    TUD_AUDIO_DESC_STD_AS_ISO_FB_EP(/*_ep*/ _epfb, /*_interval*/ 1)\
  
  //------------- TUD_USBTMC/USB488 -------------//
  #define TUD_USBTMC_APP_CLASS    (TUSB_CLASS_APPLICATION_SPECIFIC)
  #define TUD_USBTMC_APP_SUBCLASS 0x03u
  
  #define TUD_USBTMC_PROTOCOL_STD    0x00u
  #define TUD_USBTMC_PROTOCOL_USB488 0x01u
  
  //   Interface number, number of endpoints, EP string index, USB_TMC_PROTOCOL*, bulk-out endpoint ID,
  //   bulk-in endpoint ID
  #define TUD_USBTMC_IF_DESCRIPTOR(_itfnum, _bNumEndpoints, _stridx, _itfProtocol) \
    /* Interface */ \
    0x09, TUSB_DESC_INTERFACE, _itfnum, 0x00, _bNumEndpoints, TUD_USBTMC_APP_CLASS, TUD_USBTMC_APP_SUBCLASS, _itfProtocol, _stridx
  
  #define TUD_USBTMC_IF_DESCRIPTOR_LEN 9u
  
  #define TUD_USBTMC_BULK_DESCRIPTORS(_epout, _epin, _bulk_epsize) \
    /* Endpoint Out */ \
    7, TUSB_DESC_ENDPOINT, _epout, TUSB_XFER_BULK, U16_TO_U8S_LE(_bulk_epsize), 0u, \
    /* Endpoint In */ \
    7, TUSB_DESC_ENDPOINT, _epin, TUSB_XFER_BULK, U16_TO_U8S_LE(_bulk_epsize), 0u
  
  #define TUD_USBTMC_BULK_DESCRIPTORS_LEN (7u+7u)
  
  /* optional interrupt endpoint */ \
  // _int_pollingInterval : for LS/FS, expressed in frames (1ms each). 16 may be a good number?
  #define TUD_USBTMC_INT_DESCRIPTOR(_ep_interrupt, _ep_interrupt_size, _int_pollingInterval ) \
    7, TUSB_DESC_ENDPOINT, _ep_interrupt, TUSB_XFER_INTERRUPT, U16_TO_U8S_LE(_ep_interrupt_size), 0x16
  
  #define TUD_USBTMC_INT_DESCRIPTOR_LEN (7u)
  
  
  //------------- Vendor -------------//
  #define TUD_VENDOR_DESC_LEN  (9+7+7)
  
  // Interface number, string index, EP Out & IN address, EP size
  #define TUD_VENDOR_DESCRIPTOR(_itfnum, _stridx, _epout, _epin, _epsize) \
    /* Interface */\
    9, TUSB_DESC_INTERFACE, _itfnum, 0, 2, TUSB_CLASS_VENDOR_SPECIFIC, 0x00, 0x00, _stridx,\
    /* Endpoint Out */\
    7, TUSB_DESC_ENDPOINT, _epout, TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0,\
    /* Endpoint In */\
    7, TUSB_DESC_ENDPOINT, _epin, TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0
  
  //------------- DFU Runtime -------------//
  #define TUD_DFU_APP_CLASS    (TUSB_CLASS_APPLICATION_SPECIFIC)
  #define TUD_DFU_APP_SUBCLASS 0x01u
  
  // Length of template descriptr: 18 bytes
  #define TUD_DFU_RT_DESC_LEN (9 + 9)
  
  // DFU runtime descriptor
  // Interface number, string index, attributes, detach timeout, transfer size
  #define TUD_DFU_RT_DESCRIPTOR(_itfnum, _stridx, _attr, _timeout, _xfer_size) \
    /* Interface */ \
    9, TUSB_DESC_INTERFACE, _itfnum, 0, 0, TUD_DFU_APP_CLASS, TUD_DFU_APP_SUBCLASS, DFU_PROTOCOL_RT, _stridx, \
    /* Function */ \
    9, DFU_DESC_FUNCTIONAL, _attr, U16_TO_U8S_LE(_timeout), U16_TO_U8S_LE(_xfer_size), U16_TO_U8S_LE(0x0101)
  
  
  //------------- CDC-ECM -------------//
  
  // Length of template descriptor: 71 bytes
  #define TUD_CDC_ECM_DESC_LEN  (8+9+5+5+13+7+9+9+7+7)
  
  // CDC-ECM Descriptor Template
  // Interface number, description string index, MAC address string index, EP notification address and size, EP data address (out, in), and size, max segment size.
  #define TUD_CDC_ECM_DESCRIPTOR(_itfnum, _desc_stridx, _mac_stridx, _ep_notif, _ep_notif_size, _epout, _epin, _epsize, _maxsegmentsize) \
    /* Interface Association */\
    8, TUSB_DESC_INTERFACE_ASSOCIATION, _itfnum, 2, TUSB_CLASS_CDC, CDC_COMM_SUBCLASS_ETHERNET_CONTROL_MODEL, 0, 0,\
    /* CDC Control Interface */\
    9, TUSB_DESC_INTERFACE, _itfnum, 0, 1, TUSB_CLASS_CDC, CDC_COMM_SUBCLASS_ETHERNET_CONTROL_MODEL, 0, _desc_stridx,\
    /* CDC-ECM Header */\
    5, TUSB_DESC_CS_INTERFACE, CDC_FUNC_DESC_HEADER, U16_TO_U8S_LE(0x0120),\
    /* CDC-ECM Union */\
    5, TUSB_DESC_CS_INTERFACE, CDC_FUNC_DESC_UNION, _itfnum, (uint8_t)((_itfnum) + 1),\
    /* CDC-ECM Functional Descriptor */\
    13, TUSB_DESC_CS_INTERFACE, CDC_FUNC_DESC_ETHERNET_NETWORKING, _mac_stridx, 0, 0, 0, 0, U16_TO_U8S_LE(_maxsegmentsize), U16_TO_U8S_LE(0), 0,\
    /* Endpoint Notification */\
    7, TUSB_DESC_ENDPOINT, _ep_notif, TUSB_XFER_INTERRUPT, U16_TO_U8S_LE(_ep_notif_size), 1,\
    /* CDC Data Interface (default inactive) */\
    9, TUSB_DESC_INTERFACE, (uint8_t)((_itfnum)+1), 0, 0, TUSB_CLASS_CDC_DATA, 0, 0, 0,\
    /* CDC Data Interface (alternative active) */\
    9, TUSB_DESC_INTERFACE, (uint8_t)((_itfnum)+1), 1, 2, TUSB_CLASS_CDC_DATA, 0, 0, 0,\
    /* Endpoint In */\
    7, TUSB_DESC_ENDPOINT, _epin, TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0,\
    /* Endpoint Out */\
    7, TUSB_DESC_ENDPOINT, _epout, TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0
  
  
  //------------- RNDIS -------------//
  
  #if 0
  /* Windows XP */
  #define TUD_RNDIS_ITF_CLASS    TUSB_CLASS_CDC
  #define TUD_RNDIS_ITF_SUBCLASS CDC_COMM_SUBCLASS_ABSTRACT_CONTROL_MODEL
  #define TUD_RNDIS_ITF_PROTOCOL 0xFF /* CDC_COMM_PROTOCOL_MICROSOFT_RNDIS */
  #else
  /* Windows 7+ */
  #define TUD_RNDIS_ITF_CLASS    TUSB_CLASS_WIRELESS_CONTROLLER
  #define TUD_RNDIS_ITF_SUBCLASS 0x01
  #define TUD_RNDIS_ITF_PROTOCOL 0x03
  #endif
  
  // Length of template descriptor: 66 bytes
  #define TUD_RNDIS_DESC_LEN  (8+9+5+5+4+5+7+9+7+7)
  
  // RNDIS Descriptor Template
  // Interface number, string index, EP notification address and size, EP data address (out, in) and size.
  #define TUD_RNDIS_DESCRIPTOR(_itfnum, _stridx, _ep_notif, _ep_notif_size, _epout, _epin, _epsize) \
    /* Interface Association */\
    8, TUSB_DESC_INTERFACE_ASSOCIATION, _itfnum, 2, TUD_RNDIS_ITF_CLASS, TUD_RNDIS_ITF_SUBCLASS, TUD_RNDIS_ITF_PROTOCOL, 0,\
    /* CDC Control Interface */\
    9, TUSB_DESC_INTERFACE, _itfnum, 0, 1, TUD_RNDIS_ITF_CLASS, TUD_RNDIS_ITF_SUBCLASS, TUD_RNDIS_ITF_PROTOCOL, _stridx,\
    /* CDC-ACM Header */\
    5, TUSB_DESC_CS_INTERFACE, CDC_FUNC_DESC_HEADER, U16_TO_U8S_LE(0x0110),\
    /* CDC Call Management */\
    5, TUSB_DESC_CS_INTERFACE, CDC_FUNC_DESC_CALL_MANAGEMENT, 0, (uint8_t)((_itfnum) + 1),\
    /* ACM */\
    4, TUSB_DESC_CS_INTERFACE, CDC_FUNC_DESC_ABSTRACT_CONTROL_MANAGEMENT, 0,\
    /* CDC Union */\
    5, TUSB_DESC_CS_INTERFACE, CDC_FUNC_DESC_UNION, _itfnum, (uint8_t)((_itfnum) + 1),\
    /* Endpoint Notification */\
    7, TUSB_DESC_ENDPOINT, _ep_notif, TUSB_XFER_INTERRUPT, U16_TO_U8S_LE(_ep_notif_size), 1,\
    /* CDC Data Interface */\
    9, TUSB_DESC_INTERFACE, (uint8_t)((_itfnum)+1), 0, 2, TUSB_CLASS_CDC_DATA, 0, 0, 0,\
    /* Endpoint In */\
    7, TUSB_DESC_ENDPOINT, _epin, TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0,\
    /* Endpoint Out */\
    7, TUSB_DESC_ENDPOINT, _epout, TUSB_XFER_BULK, U16_TO_U8S_LE(_epsize), 0
  
  //------------- BT Radio -------------//
  #define TUD_BT_APP_CLASS                    (TUSB_CLASS_WIRELESS_CONTROLLER)
  #define TUD_BT_APP_SUBCLASS                 0x01
  #define TUD_BT_PROTOCOL_PRIMARY_CONTROLLER  0x01
  #define TUD_BT_PROTOCOL_AMP_CONTROLLER      0x02
  
  #ifndef CFG_TUD_BTH_ISO_ALT_COUNT
  #define CFG_TUD_BTH_ISO_ALT_COUNT 0
  #endif
  
  // Length of template descriptor: 30 bytes + number of ISO alternatives * 23
  #define TUD_BTH_DESC_LEN (9 + 7 + 7 + 7 + (CFG_TUD_BTH_ISO_ALT_COUNT) * (9 + 7 + 7))
  
  /* Primary Interface */
  #define TUD_BTH_PRI_ITF(_itfnum, _stridx, _ep_evt, _ep_evt_size, _ep_evt_interval, _ep_in, _ep_out, _ep_size) \
    9, TUSB_DESC_INTERFACE, _itfnum, _stridx, 3, TUD_BT_APP_CLASS, TUD_BT_APP_SUBCLASS, TUD_BT_PROTOCOL_PRIMARY_CONTROLLER, 0, \
    /* Endpoint In for events */ \
    7, TUSB_DESC_ENDPOINT, _ep_evt, TUSB_XFER_INTERRUPT, U16_TO_U8S_LE(_ep_evt_size), _ep_evt_interval, \
    /* Endpoint In for ACL data */ \
    7, TUSB_DESC_ENDPOINT, _ep_in, TUSB_XFER_BULK, U16_TO_U8S_LE(_ep_size), 1, \
    /* Endpoint Out for ACL data */ \
    7, TUSB_DESC_ENDPOINT, _ep_out, TUSB_XFER_BULK, U16_TO_U8S_LE(_ep_size), 1
  
  #define TUD_BTH_ISO_ITF(_itfnum, _alt, _ep_in, _ep_out, _n) ,\
    /* Interface with 2 endpoints */ \
    9, TUSB_DESC_INTERFACE, _itfnum, _alt, 2, TUD_BT_APP_CLASS, TUD_BT_APP_SUBCLASS, TUD_BT_PROTOCOL_PRIMARY_CONTROLLER, 0, \
    /* Isochronous endpoints */ \
    7, TUSB_DESC_ENDPOINT, _ep_in, TUSB_XFER_ISOCHRONOUS, U16_TO_U8S_LE(_n), 1, \
    7, TUSB_DESC_ENDPOINT, _ep_out, TUSB_XFER_ISOCHRONOUS, U16_TO_U8S_LE(_n), 1
  
  #define _FIRST(a, ...) a
  #define _REST(a, ...) __VA_ARGS__
  
  #define TUD_BTH_ISO_ITF_0(_itfnum, ...)
  #define TUD_BTH_ISO_ITF_1(_itfnum, _ep_in, _ep_out, ...) TUD_BTH_ISO_ITF(_itfnum, (CFG_TUD_BTH_ISO_ALT_COUNT) - 1, _ep_in, _ep_out, _FIRST(__VA_ARGS__))
  #define TUD_BTH_ISO_ITF_2(_itfnum, _ep_in, _ep_out, ...) TUD_BTH_ISO_ITF(_itfnum, (CFG_TUD_BTH_ISO_ALT_COUNT) - 2, _ep_in, _ep_out, _FIRST(__VA_ARGS__)) \
    TUD_BTH_ISO_ITF_1(_itfnum, _ep_in, _ep_out, _REST(__VA_ARGS__))
  #define TUD_BTH_ISO_ITF_3(_itfnum, _ep_in, _ep_out, ...) TUD_BTH_ISO_ITF(_itfnum, (CFG_TUD_BTH_ISO_ALT_COUNT) - 3, _ep_in, _ep_out, _FIRST(__VA_ARGS__)) \
    TUD_BTH_ISO_ITF_2(_itfnum, _ep_in, _ep_out, _REST(__VA_ARGS__))
  #define TUD_BTH_ISO_ITF_4(_itfnum, _ep_in, _ep_out, ...) TUD_BTH_ISO_ITF(_itfnum, (CFG_TUD_BTH_ISO_ALT_COUNT) - 4, _ep_in, _ep_out, _FIRST(__VA_ARGS__)) \
    TUD_BTH_ISO_ITF_3(_itfnum, _ep_in, _ep_out, _REST(__VA_ARGS__))
  #define TUD_BTH_ISO_ITF_5(_itfnum, _ep_in, _ep_out, ...) TUD_BTH_ISO_ITF(_itfnum, (CFG_TUD_BTH_ISO_ALT_COUNT) - 5, _ep_in, _ep_out, _FIRST(__VA_ARGS__)) \
    TUD_BTH_ISO_ITF_4(_itfnum, _ep_in, _ep_out, _REST(__VA_ARGS__))
  #define TUD_BTH_ISO_ITF_6(_itfnum, _ep_in, _ep_out, ...) TUD_BTH_ISO_ITF(_itfnum, (CFG_TUD_BTH_ISO_ALT_COUNT) - 6, _ep_in, _ep_out, _FIRST(__VA_ARGS__)) \
    TUD_BTH_ISO_ITF_5(_itfnum, _ep_in, _ep_out, _REST(__VA_ARGS__))
  
  #define TUD_BTH_ISO_ITFS(_itfnum, _ep_in, _ep_out, ...) \
    TU_XSTRCAT(TUD_BTH_ISO_ITF_, CFG_TUD_BTH_ISO_ALT_COUNT)(_itfnum, _ep_in, _ep_out, __VA_ARGS__)
  
  // BT Primary controller descriptor
  // Interface number, string index, attributes, event endpoint, event endpoint size, interval, data in, data out, data endpoint size, iso endpoint sizes
  #define TUD_BTH_DESCRIPTOR(_itfnum, _stridx, _ep_evt, _ep_evt_size, _ep_evt_interval, _ep_in, _ep_out, _ep_size,...) \
    TUD_BTH_PRI_ITF(_itfnum, _stridx, _ep_evt, _ep_evt_size, _ep_evt_interval, _ep_in, _ep_out, _ep_size) \
    TUD_BTH_ISO_ITFS(_itfnum + 1, _ep_in + 1, _ep_out + 1, __VA_ARGS__)
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* _TUSB_USBD_H_ */
  
  /** @} */
  