iPort IW-2, Instruction Manual

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25. GetNumberedCategorizedDBRecords
0x3C 0x24 GetNumberedCategorizedDBRecords
Direction: Controller —> iPort
Description: Requests the number of records of a particular data-
base category. Category type codes are described
in the
SelectSortDBRecord command code descrip-
tion section.
NOTE: The record count returned by this command depends on
the database state before this command is sent. If the database
has been reset (
ResetDBSelection), then this command will return
the total number of records for a given category. If this command
is sent after one or more categories are selected, then the record
count will be the subset of records that are members of all the
categories selected prior to this command.
Packet Structure:
Byte Number Value Meaning
0x00 0x2A Start character
0x01 0x49 Device type (iPort)
0x02 0x00 Packet Length High Byte
0x03 0x04 Packet Length Low Byte
0x04 0x38 Packet Command Type
0x05 0x3C Packet Command High Byte
0x06 0x24 Packet Command Low Byte
0x07 0xNN Category Type Code
0x08 0xNN Checksum
26. ReturnNumberedCategorizedDBRecords
0x3C 0x25 ReturnNumberedCategorizedDBRecords
Direction: iPort —> Controller
Description: In response to the
GetNumberedCategorizedDB
Records command, returns the number of database
records matching the specified database category. If
no matching database records are found, a record
count of zero will be returned.
Packet Structure:
Byte Number Value Meaning
0x00 0x2A Start character
0x01 0x49 Device type (iPort)
0x02 0x00 Packet Length High Byte
0x03 0x07 Packet Length Low Byte
0x04 0x38 Packet Command Type
0x05 0x3C Packet Command High Byte
0x06 0x25 Packet Command Low Byte
0x07 0xNN Database Record Count (byte 4)
0x08 0xNN Database Record Count (byte 3)
0x09 0xNN Database Record Count (byte 2)
0x0A 0xNN Database Record Count (byte 1)
0x0B 0xNN Checksum
27. RetrieveCategorizedDBRecords
0x3C 0x26 RetrieveCategorizedDBRecords
Direction: Controller —> iPort
Description: Retrieves one or more database records from the
iPod based usually based on the results from the
GetNumberCategorizedDBRecords query. Category
type codes are described in the
SelectSort
DBRecord command code description section.
Packet Structure:
Byte Number Value Meaning
0x00 0x2A Start character
0x01 0x49 Device type (iPort)
0x02 0x00 Packet Length High Byte
0x03 0x0C Packet Length Low Byte
0x04 0x38 Packet Command Type
0x05 0x3C Packet Command High Byte
0x06 0x26 Packet Command Low Byte
0x07 0xNN Category Type Code
0x08 0xNN Database Record Start Index (byte 4)
0x09 0xNN Database Record Start Index (byte 3)
0x0A 0xNN Database Record Start Index (byte 2)
0x0B 0xNN Database Record Start Index (byte 1)
0x0C 0xNN Database Record Read Count (byte 4)
0x0D 0xNN Database Record Read Count (byte 3)
0x0E 0xNN Database Record Read Count (byte 2)
0x0F 0xNN Database Record Read Count (byte 1)
0x10 0xNN Checksum
11
Instruction Manual
iPort RS-232 Programming
iPort
Command
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iPort
Command
Low Byte
Command
iPort
Command
High Byte
iPort
Command
Low Byte
Command
iPort
Command
High Byte
iPort
Command
Low Byte
Command