Mbed OS Reference | USBDescriptor.h Source File

 /*
  * Copyright (c) 2018-2019, Arm Limited and affiliates.
  * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 #ifndef USBDESCRIPTOR_H
 #define USBDESCRIPTOR_H
 
 /* Standard descriptor types */
 #define DEVICE_DESCRIPTOR        (1)
 #define CONFIGURATION_DESCRIPTOR (2)
 #define STRING_DESCRIPTOR        (3)
 #define INTERFACE_DESCRIPTOR     (4)
 #define ENDPOINT_DESCRIPTOR      (5)
 #define QUALIFIER_DESCRIPTOR     (6)
 
 /* Standard descriptor lengths */
 #define DEVICE_DESCRIPTOR_LENGTH        (0x12)
 #define CONFIGURATION_DESCRIPTOR_LENGTH (0x09)
 #define INTERFACE_DESCRIPTOR_LENGTH     (0x09)
 #define ENDPOINT_DESCRIPTOR_LENGTH      (0x07)
 
 
 /*string offset*/
 #define STRING_OFFSET_LANGID            (0)
 #define STRING_OFFSET_IMANUFACTURER     (1)
 #define STRING_OFFSET_IPRODUCT          (2)
 #define STRING_OFFSET_ISERIAL           (3)
 #define STRING_OFFSET_ICONFIGURATION    (4)
 #define STRING_OFFSET_IINTERFACE        (5)
 
 /* USB Specification Release Number */
 #define USB_VERSION_2_0 (0x0200)
 
 /* Least/Most significant byte of short integer */
 #define LSB(n)  ((n)&0xff)
 #define MSB(n)  (((n)&0xff00)>>8)
 
 /* bmAttributes in configuration descriptor */
 /* C_RESERVED must always be set */
 #define C_RESERVED      (1U<<7)
 #define C_SELF_POWERED  (1U<<6)
 #define C_REMOTE_WAKEUP (1U<<5)
 
 /* bMaxPower in configuration descriptor */
 #define C_POWER(mA)     ((mA)/2)
 
 /* bmAttributes in endpoint descriptor */
 #define E_CONTROL       (0x00)
 #define E_ISOCHRONOUS   (0x01)
 #define E_BULK          (0x02)
 #define E_INTERRUPT     (0x03)
 
 /* For isochronous endpoints only: */
 #define E_NO_SYNCHRONIZATION    (0x00)
 #define E_ASYNCHRONOUS          (0x04)
 #define E_ADAPTIVE              (0x08)
 #define E_SYNCHRONOUS           (0x0C)
 #define E_DATA                  (0x00)
 #define E_FEEDBACK              (0x10)
 #define E_IMPLICIT_FEEDBACK     (0x20)
 
 #endif
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