public class UsbEndpoint extends Object implements Parcelable
UsbInterface
.
Endpoints are the channels for sending and receiving data over USB.
Typically bulk endpoints are used for sending non-trivial amounts of data.
Interrupt endpoints are used for sending small amounts of data, typically events,
separately from the main data streams.
The endpoint zero is a special endpoint for control messages sent from the host
to device.
Isochronous endpoints are currently unsupported.Parcelable.ClassLoaderCreator<T>, Parcelable.Creator<T>
Modifier and Type | Field and Description |
---|---|
static Parcelable.Creator<UsbEndpoint> |
CREATOR |
CONTENTS_FILE_DESCRIPTOR, PARCELABLE_ELIDE_DUPLICATES, PARCELABLE_WRITE_RETURN_VALUE
Constructor and Description |
---|
UsbEndpoint(int address,
int attributes,
int maxPacketSize,
int interval)
UsbEndpoint should only be instantiated by UsbService implementation
|
Modifier and Type | Method and Description |
---|---|
int |
describeContents()
Describe the kinds of special objects contained in this Parcelable
instance's marshaled representation.
|
int |
getAddress()
Returns the endpoint's address field.
|
int |
getAttributes()
Returns the endpoint's attributes field.
|
int |
getDirection()
Returns the endpoint's direction.
|
int |
getEndpointNumber()
Extracts the endpoint's endpoint number from its address
|
int |
getInterval()
Returns the endpoint's interval field.
|
int |
getMaxPacketSize()
Returns the endpoint's maximum packet size.
|
int |
getType()
Returns the endpoint's type.
|
String |
toString()
Returns a string representation of the object.
|
void |
writeToParcel(Parcel parcel,
int flags)
Flatten this object in to a Parcel.
|
public static final Parcelable.Creator<UsbEndpoint> CREATOR
public UsbEndpoint(int address, int attributes, int maxPacketSize, int interval)
public int getAddress()
getEndpointNumber()
and getDirection()
.public int getEndpointNumber()
public int getDirection()
UsbConstants.USB_DIR_OUT
if the direction is host to device, and
UsbConstants.USB_DIR_IN
if the
direction is device to host.UsbConstants#USB_DIR_IN}
,
UsbConstants#USB_DIR_OUT}
public int getAttributes()
public int getType()
UsbConstants.USB_ENDPOINT_XFER_CONTROL
(endpoint zero)
UsbConstants.USB_ENDPOINT_XFER_ISOC
(isochronous endpoint)
UsbConstants.USB_ENDPOINT_XFER_BULK
(bulk endpoint)
UsbConstants.USB_ENDPOINT_XFER_INT
(interrupt endpoint)
public int getMaxPacketSize()
public int getInterval()
public String toString()
Object
toString
method returns a string that
"textually represents" this object. The result should
be a concise but informative representation that is easy for a
person to read.
It is recommended that all subclasses override this method.
The toString
method for class Object
returns a string consisting of the name of the class of which the
object is an instance, the at-sign character `@
', and
the unsigned hexadecimal representation of the hash code of the
object. In other words, this method returns a string equal to the
value of:
getClass().getName() + '@' + Integer.toHexString(hashCode())
public int describeContents()
Parcelable
Parcelable.writeToParcel(Parcel, int)
,
the return value of this method must include the
Parcelable.CONTENTS_FILE_DESCRIPTOR
bit.describeContents
in interface Parcelable
Parcelable.CONTENTS_FILE_DESCRIPTOR
public void writeToParcel(Parcel parcel, int flags)
Parcelable
writeToParcel
in interface Parcelable
parcel
- The Parcel in which the object should be written.flags
- Additional flags about how the object should be written.
May be 0 or Parcelable.PARCELABLE_WRITE_RETURN_VALUE
.