USB descriptors

Provides USB protocol descriptors and defines for USB frameworks. More...

Detailed Description

Provides USB protocol descriptors and defines for USB frameworks.

Files
file	descriptor.h
	Definitions for USB protocol messages.

Data Structures
struct	usb_descriptor_device_t
	USB device descriptor (USB 2.0 spec table 9-8) More...
struct	usb_descriptor_configuration_t
	USB configuration descriptor (USB 2.0 spec table 9-10) More...
struct	usb_descriptor_interface_t
	USB interface descriptor (USB 2.0 spec table 9-12) More...
struct	usb_descriptor_endpoint_t
	USB endpoint descriptor (USB 2.0 spec table 9-13) More...
struct	usb_descriptor_string_t
	USB string descriptor (USB 2.0 spec table 9-16) More...
struct	usb_descriptor_interface_association_t
	USB interface association descriptor (Interface Association Descriptors table 9-Z) More...
struct	usb_setup_t
	USB setup packet (USB 2.0 spec table 9-2) More...

Macros
#define	USB_ENDPOINT_DESCRIPTOR_INTERVAL_ISOCHRONOUS   1
	USB isochronous endpoint interval.

Functions
static bool	usb_setup_is_read (usb_setup_t *pkt)
	getter for setup packet direction More...

USB standard device request codes (USB 2.0 spec table 9-4)
#define	USB_SETUP_REQ_GET_STATUS   0x00
	Status request
#define	USB_SETUP_REQ_CLEAR_FEATURE   0x01
	Clear feature
#define	USB_SETUP_REQ_SET_FEATURE   0x03
	Set feature
#define	USB_SETUP_REQ_SET_ADDRESS   0x05
	Set address
#define	USB_SETUP_REQ_GET_DESCRIPTOR   0x06
	Get descriptor
#define	USB_SETUP_REQ_SET_DESCRIPTOR   0x07
	Set descriptor
#define	USB_SETUP_REQ_GET_CONFIGURATION   0x08
	Get configuration
#define	USB_SETUP_REQ_SET_CONFIGURATION   0x09
	Set configuration
#define	USB_SETUP_REQ_GET_INTERFACE   0x0a
	Get interface
#define	USB_SETUP_REQ_SET_INTERFACE   0x0b
	Set interface
#define	USB_SETUP_REQ_SYNCH_FRAME   0x0c
	Synch frame

USB descriptor types (USB 2.0 spec table 9-5)
#define	USB_TYPE_DESCRIPTOR_DEVICE   0x01
	Device descriptor
#define	USB_TYPE_DESCRIPTOR_CONFIGURATION   0x02
	Configuration Descriptor
#define	USB_TYPE_DESCRIPTOR_STRING   0x03
	String descriptor
#define	USB_TYPE_DESCRIPTOR_INTERFACE   0x04
	Interface descriptor
#define	USB_TYPE_DESCRIPTOR_ENDPOINT   0x05
	Endpoint descriptor
#define	USB_TYPE_DESCRIPTOR_DEV_QUALIFIER   0x06
	Device qualifier
#define	USB_TYPE_DESCRIPTOR_SPEED_CONFIG   0x07
	Other speed configuration.
#define	USB_TYPE_DESCRIPTOR_IFACE_POWER   0x08
	Interface power
#define	USB_TYPE_DESCRIPTOR_INTERFACE_ASSOC   0x0b
	Interface association

USB configuration attributes
#define	USB_CONF_ATTR_RESERVED   0x80
	Reserved bit (always 1)
#define	USB_CONF_ATTR_SELF_POWERED   0x40
	Self powered device flag
#define	USB_CONF_ATTR_REM_WAKEUP   0x20
	Remote wake-up flag

USB setup packet requests types
#define	USB_SETUP_REQUEST_DEVICE2HOST   0x80
	Request direction From device to host if the bit is set
#define	USB_SETUP_REQUEST_RECIPIENT_MASK   0x1f
	Recipient mask
#define	USB_SETUP_REQUEST_RECIPIENT_DEVICE   0x00
	Device request
#define	USB_SETUP_REQUEST_RECIPIENT_INTERFACE   0x01
	Interface request
#define	USB_SETUP_REQUEST_RECIPIENT_ENDPOINT   0x02
	Endpoint request
#define	USB_SETUP_REQUEST_RECIPIENT_OTHER   0x03
	Other type request
#define	USB_SETUP_REQUEST_TYPE_MASK   0x60
	Mask to select the type.
#define	USB_SETUP_REQUEST_TYPE_STANDARD   0x00
	Standard request
#define	USB_SETUP_REQUEST_TYPE_CLASS   0x20
	Class request
#define	USB_SETUP_REQUEST_TYPE_VENDOR   0x40
	Vendor specific request.

USB device class numbers
#define	USB_CLASS_AUDIO   0x01
	Audio device
#define	USB_CLASS_CDC_CONTROL   0x02
	CDC control interface
#define	USB_CLASS_HID   0x03
	Human Interface device
#define	USB_CLASS_PHYSICAL   0x05
	Physical device class
#define	USB_CLASS_IMAGE   0x06
	Image device class
#define	USB_CLASS_PRINTER   0x07
	Printer device class
#define	USB_CLASS_MASS_STORAGE   0x08
	Mass storage device class
#define	USB_CLASS_CDC_DATA   0x0a
	CDC data specification
#define	USB_CLASS_VENDOR   0xff
	Vendor specific class

Function Documentation

usb_setup_is_read()

static bool usb_setup_is_read ( usb_setup_t *  pkt )

inlinestatic

getter for setup packet direction

Parameters

[in]

pkt

setup packet

Returns

nonzero if it is a read request

zero if it is a write request

Definition at line 214 of file descriptor.h.