HIDP_VALUE_CAPS (Compact 2013)

아티클
07/31/2017

3/26/2014

This structure contains information that describes the capability of a set of HID control values, either a single usage or a usage range.

Syntax

typedef struct _HIDP_VALUE_CAPS {
  USAGE UsagePage;
  UCHAR ReportID;
  BOOLEAN IsAlias;
  USHORT BitField;
  USHORT LinkCollection;
  USAGE LinkUsage;
  USAGE LinkUsagePage;
  BOOLEAN IsRange;
  BOOLEAN IsStringRange;
  BOOLEAN IsDesignatorRange;
  BOOLEAN IsAbsolute;
  BOOLEAN HasNull;
  UCHAR Reserved;
  USHORT BitSize;
  USHORT ReportCount;
  USHORT Reserved2[5];
  ULONG UnitsExp;
  ULONG Units;
  LONG LogicalMin, LogicalMax;
  LONG PhysicalMin, PhysicalMax;
    union {
      struct {
        USAGE UsageMin, UsageMax;
        USHORT StringMin, StringMax;
        USHORT DesignatorMin, DesignatorMax;
        USHORT DataIndexMin, DataIndexMax;
      } Range;
      struct {
        USAGE Usage, Reserved1;
        USHORT StringIndex, Reserved2;
        USHORT DesignatorIndex, Reserved3;
        USHORT DataIndex, Reserved4;
      } NotRange;
    };
} HIDP_VALUE_CAPS, * PHIDP_VALUE_CAPS;

Members

UsagePage
Usage page of the usage or usage range.

ReportID
Report identifier of the HID report that contains the usage or usage range.

IsAlias
Aliased usage indicator. If TRUE, the usage is a member of a set of aliased usages. If FALSE, the value has only one usage.

BitField
Data fields, one or two bytes, associated with an input, output, or feature main item.

LinkCollection
Index of the link collection in a top-level collection's link collection array that contains the usage or usage range. If LinkCollection is zero, the usage or usage range is contained in the top-level collection.

LinkUsage
Usage of the link collection that contains the usage or usage range. If LinkCollection is zero, LinkUsage specifies the usage of the top-level collection.

LinkUsagePage
Usage page of the link collection that contains the usage or usage range. If LinkCollection is zero, LinkUsagePage specifies the usage page of the top-level collection.

IsRange
Usage range indicator. If TRUE, the structure describes a usage range. If FALSE, the structure describes a single usage.

IsStringRange
String descriptor indicator. If TRUE, the usage or usage range has a set of string descriptors. If FALSE, the usage or usage range has zero or one string descriptor.

IsDesignatorRange
Usage designator indicator. If TRUE, the usage or usage range has a set of designators. If FALSE, the usage or usage range has zero or one designator.

IsAbsolute
Absolute data indicator. If TRUE, the usage or usage range provides absolute data. If FALSE, the value is the change in state from the previous value.

HasNull
NULL support indicator. If TRUE, that the usage supports a NULL value, which indicates that the data is not valid and should be ignored. If FALSE, the usage does not have a NULL value.

Reserved
Reserved.

BitSize
Size, in bits, of a usage's data field in a report. If ReportCount is greater than one, each usage has a separate data field of this size.

ReportCount
Number of usages that this structure describes.

Reserved2
Reserved.

UnitsExp
Usage's exponent, as described by the USB HID standard.

Units
Usage's units, as described by the USB HID standard.

LogicalMin
Usage's signed lower bound.

LogicalMax
Usage's signed upper bound.

PhysicalMin
Usage's signed lower bound after scaling is applied to the logical minimum value.

PhysicalMax
Usage's signed upper bound after scaling is applied to the logical maximum value.

Range.UsageMin
Inclusive lower bound of usage range whose inclusive upper bound is specified by Range.UsageMax.

Range.UsageMax
Inclusive upper bound of a usage range whose inclusive lower bound is indicated by Range.UsageMin.

Range.StringMin
Inclusive lower bound of a range of string descriptors, specified by string minimum and string maximum items, whose inclusive upper bound is indicated by Range.StringMax.

Range.StringMax
Inclusive upper bound of a range of string descriptors, specified by string minimum and string maximum items, whose inclusive lower bound is indicated by Range.StringMax.

Range.DesignatorMin
Inclusive lower bound of a range of designators, specified by designator minimum and designator maximum items, whose inclusive upper bound is indicated by Range.DesignatorMax.

Range.DesignatorMax
Inclusive upper bound of a range of designators, specified by designator minimum and designator maximum items, whose inclusive lower bound is indicated by Range.DesignatorMax.

Range.DataIndexMin
Inclusive lower bound of a sequential range of data indexes that correspond, one-to-one and in the same order, to the usages specified by the usage range Range.UsageMin to Range.UsageMax.

Range.DataIndexMax
Inclusive upper bound of a sequential range of data indexes that correspond, one-to-one and in the same order, to the usages specified by the usage range Range.UsageMin to Range.UsageMax.

Range
Usage range indicator. If TRUE, information about a usage range. If FALSE, NotRange contains information about a single usage.

NotRange.Usage
Usage identifier.

NotRange.Reserved1
Reserved.

NotRange.StringID
String descriptor identifier for the usage specified by NotRange.Usage.

NotRange.Reserved2
Reserved.

NotRange.DesignatorID
Designator identifier for the usage specified by NotRange.Usage.

NotRange.Reserved3
Reserved.

NotRange.DataIndex
Data index of the usage specified by NotRange.Usage.

NotRange.Reserved4
Reserved.

NotRange
Usage range indicator. If FALSE, information about a single usage. If TRUE, information about a usage range.

Remarks

Clients obtain a value capability array by calling HidP_GetValueCaps or HidP_GetSpecificValueCaps. These functions return an array of HIDP_VALUE_CAPS structures in a caller-allocated buffer. The HIDP_CAPS structure, which the HidP_GetCaps function returns, specifies the required buffer length.

Requirements

Header

hidpi.h

다음을 통해 공유

HIDP_VALUE_CAPS (Compact 2013)

Syntax

Members

Remarks

Requirements

See Also

Reference

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