Compaq 99875320-5 - Manual (Page 24)

USB HID IntelliHead Swipe Reader
The result codes for the Get and Set Property commands can be any of the codes list in the
generic result code table.
Property ID is a one-byte field that contains a value that identifies the property. The following
table lists all the current property ID values:
Value
(Hex)
Property ID Description
00 SOFTWARE_ID The device’s software identifier
01 SERIAL_NUM The device’s serial number
02 POLLING_INTERVAL The interrupt pipe’s polling interval
03 MAX_PACKET_SIZE The interrupt pipe’s packet size
04 TRACK_ID_ENABLE Allows tracks to be disabled
10 INTERFACE_TYPE Type of USB interface
1A DECODE_ENABLE Enables decoding for certain formats
The Property Value is a multiple-byte field that contains the value of the property. The number
of bytes in this field depends on the type of property and the length of the property. The
following table lists all of the property types and describes them.
Property Type Description
Byte
This is a one-byte value. The valid values depend on the property.
String This is a multiple-byte ASCII string. Its length can be zero to a
maximum length that depends on the property. The value and
length of the string does not include a terminating NUL character.
SOFTWARE_ID PROPERTY
Property ID:
0x00
Property Type: String
Length: Fixed at 11 bytes
Get Property: Yes
Set Property: No
Description: This is an 11-byte read only property that identifies the software part number
and version for the device. The first 8 bytes represent the part number and the
last 3 bytes represent the version. For example this string might be
“21042812D01”. Examples follow:
Example Get Software ID property Request (Hex):
Cmd Num Data Len Prp ID
00 01 00
Example Get Software ID property Response (Hex):
Result Code Data Len Prp Value
00 01 32 31 30 34 32 38 31 32 44 30 31
16