Definitions of constants as described by the USB 2.0 standard. More...

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Macros
USB request direction
#define	REQ_DIR_MASK (0x1<<7)

#define	REQ_DIR_OUT (0<<7)

#define	REQ_DIR_IN (1<<7)

#define	GET_REQUEST_DIRECTION(bmRequestType) (bmRequestType & REQ_DIR_MASK)

USB request type
#define	REQ_TYPE_MASK (0x3<<5)

#define	REQ_TYPE_STANDARD (0<<5)

#define	REQ_TYPE_CLASS (1<<5)

#define	REQ_TYPE_VENDOR (2<<5)

#define	GET_REQUEST_TYPE(bmRequestType) (bmRequestType & REQ_TYPE_MASK)

USB request recipient
#define	REQ_REC_MASK 0x1F

#define	REQ_REC_DEVICE 0

#define	REQ_REC_INTERFACE 1

#define	REQ_REC_ENDPOINT 2

#define	REQ_REC_OTHER 3

#define	GET_REQUEST_RECIPIENT(bmRequestType) (bmRequestType & REQ_REC_MASK)

USB device status
#define	DEVICE_STATUS_SELF_POWERED 1

#define	DEVICE_STATUS_REMOTE_WAKEUP 2

#define	ENDPOINT_STATUS_HALTED 1

Enumerations
enum	usb_pid_t { PID_OUT = 0x1, PID_IN = 0x9, PID_SOF = 0x5, PID_SETUP = 0xD, PID_DATA0 = 0x3, PID_DATA1 = 0xB, PID_DATA2 = 0x7, PID_MDATA = 0xF, PID_ACK = 0x2, PID_NAK = 0xA, PID_STALL = 0xE, PIT_NYET = 0x6, PID_PRE = 0xC, PID_ERR = 0xC, PID_SPLIT = 0x8, PID_PING = 0x4 }
	USB packet IDs.

enum	usb_request_code_t { GET_STATUS = 0, CLEAR_FEATURE = 1, SET_FEATURE = 3, SET_ADDRESS = 5, GET_DESCRIPTOR = 6, SET_DESCRIPTOR = 7, GET_CONFIGURATION = 8, SET_CONFIGURATION = 9, GET_INTERFACE = 10, SET_INTERFACE = 11, SYNCH_FRAME = 12 }

enum	usb_feature_t { ENDPOINT_HALT = 0, REMOTE_WAKEUP = 1, TEST_MODE = 2 }

Detailed Description

Definitions of constants as described by the USB 2.0 standard.

A few types, constants and macros used by the USB subsystem.

Enumeration Type Documentation

USB device or endpoint features.

Enumerator
ENDPOINT_HALT	If the endpoint is/should be stalled.
REMOTE_WAKEUP	Remote wake-up of host by device.
TEST_MODE	Switch the device to test mode – a high-speed feature, so not supported.

USB request codes defined in §9.4 of the specification. Not all requests are currently supported.

Enumerator
GET_STATUS	Get device or endpoint status.
CLEAR_FEATURE	Turn device or endpoint feature off. See usb_feature_t.
SET_FEATURE	Turn device or endpoint feature on. See usb_feature_t.
SET_ADDRESS	Set device address.
GET_DESCRIPTOR	Get USB descriptor.
SET_DESCRIPTOR	Set USB descriptor, not supported.
GET_CONFIGURATION	Get currently selected configuration index.
SET_CONFIGURATION	Set device configuration.
GET_INTERFACE	Get currently selected interface, not supported.
SET_INTERFACE	Select interface, not supported.
SYNCH_FRAME	Device synchronisation for isochronous configurations, not supported.