Chapter 2. API Reference
USB_SETUP_PACKET_INIT_GET_CONFIG_DESC(setup_pkt_ptr, desc_index, desc_len)
Initializer for a request to get one of the device’s current configuration descriptor.
• desc_index indicates the configuration’s index number
• Number of bytes of the configuration descriptor to get
USB_SETUP_PACKET_INIT_SET_CONFIG(setup_pkt_ptr, config_num)
Initializer for a request to set a device’s current configuration number.
USB_SETUP_PACKET_INIT_SET_INTERFACE(setup_pkt_ptr, intf_num, alt_setting_num)
Initializer for a request to set an interface’s alternate setting.
USB_SETUP_PACKET_INIT_GET_STR_DESC(setup_pkt_ptr, string_index, desc_len)
Initializer for a request to get an string descriptor.
USB_STANDARD_DESC_SIZE
Size of dummy USB standard descriptor.
USB_DEVICE_DESC_SIZE
Size of a USB device descriptor in bytes.
USB_CLASS_PER_INTERFACE
Possible base class values of the bDeviceClass field of a USB device descriptor.
USB_CLASS_AUDIO
USB_CLASS_COMM
USB_CLASS_HID
USB_CLASS_PHYSICAL
USB_CLASS_STILL_IMAGE
USB_CLASS_PRINTER
USB_CLASS_MASS_STORAGE
USB_CLASS_HUB
USB_CLASS_CDC_DATA
USB_CLASS_CSCID
USB_CLASS_CONTENT_SEC
USB_CLASS_VIDEO
USB_CLASS_WIRELESS_CONTROLLER
USB_CLASS_PERSONAL_HEALTHCARE
USB_CLASS_AUDIO_VIDEO
USB_CLASS_BILLBOARD
USB_CLASS_USB_TYPE_C_BRIDGE
USB_CLASS_MISC
USB_CLASS_APP_SPEC
USB_CLASS_VENDOR_SPEC
USB_SUBCLASS_VENDOR_SPEC
Vendor specific subclass code.
USB_CONFIG_DESC_SIZE
Size of a short USB configuration descriptor in bytes.
Note The size of a full USB configuration includes all the interface and endpoint descriptors of that configu-
ration.
Espressif Systems 505
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