VIODEVICEMETRICS

This structure provides details about a vehicle input/output (I/O) device.

Syntax

typedef struct {
CLSID clsidDevice;
TCHAR szDeviceName[VIODEVICENAMESIZE];
DWORD grfModes;
VARIANT vRangeLow;
VARIANT vRangeHigh;
DWORD dwValueType;
DWORD dwValueUnits;
LONG lExponent;
}

Members

clsidDevice

Class identifier (CLSID) of this particular device.

szDeviceName

Null-terminated string that contains the name of the device.

grfModes

Group of flags reflecting a device’s possible access modes. It is one of the values shown in the following table.

Access mode	Value
VIODEVICEMODE_READ	0x0001
VIODEVICEMODE_WRITE	0x0002

vRangeLow

Lower bound of the data value. For specific values, see “CLSIDs for the Auto PC.” For example, CLSID_VIO_VEHICLE_SPEED component’s low value is 0.

vRangeHigh

Upper bound of the data value. For specific values, see “CLSIDs for the Auto PC.” For example, the CLSID_VIO_VEHICLE_SPEED component’s high value is 383.

dwValueType

Specifies the type of data value, such as distance, current, and voltage. It is one of the following flags:

Data value type	Value
VIOMEASUREMENT_STATE	0
VIOMEASUREMENT_ONOFF	1
VIOMEASUREMENT_PERCENTAGE	2
VIOMEASUREMENT_ROTATIONALSPEED	3
VIOMEASUREMENT_SPEED	4
VIOMEASUREMENT_TEMPERATURE	5
VIOMEASUREMENT_GAGEPESSURE	6
VIOMEASUREMENT_ROTATION	7
VIOMEASUREMENT_VOLTAGE	8
VIOMEASUREMENT_ABSOLUTEPRESSURE	9
VIOMEASUREMENT_FLOWRATE	10
VIOMEASUREMENT_DISCRETEMASK	11
VIOMEASUREMENT_DISTANCE	12
VIOMEASUREMENT_COLLECTION	13

dwValueUnits

Specifies the units in which data value is expressed, such as kilometers, volts, degrees. It is one of the following flags:

Units	Value
VIOUNITS_ENUM	0
VIOUNITS_BINARY	1
VIOUNITS_PERCENT	2
VIOUNITS_RPM	3
VIOUNITS_KILOMETERSPERHOUR	4
VIOUNITS_CELSIUS	5
VIOUNITS_KILOPASCALSGAGE	6
VIOUNITS_DEGREES	7
VIOUNITS_VOLTS	8
VIOUNITS_KILOPASCALSABSOLUTE	9
VIOUNITS_GRAMSPERSECOND	10
VIOUNITS_BITMASK	11
VIOUNITS_KILOMETERS	12
VIOUNITS_DIAGNOSTICITEMS	13

lExponent

Long integer that contains the exponent used to determine number of digits to the right of the decimal place.