Package ch.ntb.usb
Class Usb_Config_Descriptor
java.lang.Object
ch.ntb.usb.Usb_Descriptor
ch.ntb.usb.Usb_Config_Descriptor
Represents the descriptor of a USB configuration.
A USB device can have several different configuration.
The length of the configuration descriptor is
A USB device can have several different configuration.
The length of the configuration descriptor is
Usb_Descriptor.USB_DT_CONFIG_SIZE
and the type is
Usb_Descriptor.USB_DT_CONFIG
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final int
Maximum number of configurations per deviceFields inherited from class ch.ntb.usb.Usb_Descriptor
USB_DT_CONFIG, USB_DT_CONFIG_SIZE, USB_DT_DEVICE, USB_DT_DEVICE_SIZE, USB_DT_ENDPOINT, USB_DT_ENDPOINT_AUDIO_SIZE, USB_DT_ENDPOINT_SIZE, USB_DT_HID, USB_DT_HUB, USB_DT_HUB_NONVAR_SIZE, USB_DT_INTERFACE, USB_DT_INTERFACE_SIZE, USB_DT_PHYSICAL, USB_DT_REPORT, USB_DT_STRING
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionbyte
Returns the value to use as an argument to select this configuration (LibusbJava.usb_set_configuration(long, int)
).byte
Returns the power parameters for this configuration.
Bit 7: Reserved, set to 1 (USB 1.0 Bus Powered)
Bit 6: Self Powered
Bit 5: Remote Wakeup
Bit 4..0: Reserved, set to 0byte
Returns the number of interfaces.byte[]
getExtra()
Returns the data of extra descriptor(s) if available.int
Returns the number of bytes of the extra descriptor.byte
Returns the index of the String descriptor describing this configuration.Returns the USB interface descriptors.byte
Returns the maximum power consumption in 2mA units.short
Returns the total length in bytes of all descriptors.
When the configuration descriptor is read, it returns the entire configuration hierarchy which includes all related interface and endpoint descriptors.toString()
Methods inherited from class ch.ntb.usb.Usb_Descriptor
getBDescriptorType, getBLength
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Field Details
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USB_MAXCONFIG
public static final int USB_MAXCONFIGMaximum number of configurations per device- See Also:
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Constructor Details
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Usb_Config_Descriptor
public Usb_Config_Descriptor()
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Method Details
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getBConfigurationValue
public byte getBConfigurationValue()Returns the value to use as an argument to select this configuration (LibusbJava.usb_set_configuration(long, int)
).- Returns:
- the value to use as an argument to select this configuration
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getBmAttributes
public byte getBmAttributes()Returns the power parameters for this configuration.
Bit 7: Reserved, set to 1 (USB 1.0 Bus Powered)
Bit 6: Self Powered
Bit 5: Remote Wakeup
Bit 4..0: Reserved, set to 0- Returns:
- the power parameters for this configuration
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getBNumInterfaces
public byte getBNumInterfaces()Returns the number of interfaces.- Returns:
- the number of interfaces
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getExtra
public byte[] getExtra()Returns the data of extra descriptor(s) if available.- Returns:
- null or a byte array with the extra descriptor data
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getExtralen
public int getExtralen()Returns the number of bytes of the extra descriptor.- Returns:
- the number of bytes of the extra descriptor
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getIConfiguration
public byte getIConfiguration()Returns the index of the String descriptor describing this configuration.- Returns:
- the index of the String descriptor
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getInterface
Returns the USB interface descriptors.- Returns:
- the USB interface descriptors
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getMaxPower
public byte getMaxPower()Returns the maximum power consumption in 2mA units.- Returns:
- the maximum power consumption in 2mA units
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getWTotalLength
public short getWTotalLength()Returns the total length in bytes of all descriptors.
When the configuration descriptor is read, it returns the entire configuration hierarchy which includes all related interface and endpoint descriptors. ThewTotalLength
field reflects the number of bytes in the hierarchy.- Returns:
- the total length in bytes of all descriptors
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toString
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