UM1865 datasheet(64/132 Pages) STMICROELECTRONICS

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Vendor specific commands

UM1865

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DocID027514 Rev 1

4.3.37

Aci_Gap_Start_Observation_Proc

Description:

Starts an Observation procedure, when the device is in Observer Role. The host enables

scanning in the controller. The advertising reports are sent to the upper layer using standard

LE Advertising Report Event. See Bluetooth Core v4.1, Vol. 2, part E, Ch. 7.7.65.2, LE

Advertising Report Event.

Command Parameters:

Table 115. Aci_Gap_Start_Observation_Proc

Command name

Parameters

Return

Aci_Gap_Start_Observation_Proc

(0xFCA2)

Scan_Type

Scan_Interval

Scan_Window

Own_Address_Type

filterDuplicates

Status

Table 116. Aci_Gap_Start_Observation_Proc commands parameters

Parameter

Size

Description

Scan_Interval

2 bytes

Time interval from when the Controller started its last LE

scan until it begins the subsequent LE scan. The scan

interval should be a number in the range 0x0004 to

0x4000. This corresponds to a time range 2.5 msec to

10240 msec. For a number N, Time = N * 0.625 msec.

Scan_Window

2 bytes

Amount of time for the duration of the LE scan.

Scan_Window shall be less than or equal to

Scan_Interval. The scan window should be a number in

the range 0x0004 to 0x4000. This corresponds to a time

range 2.5 msec to 10240 msec. For a number N, Time = N

* 0.625 msec.

Scan_Type

1 byte

0x00: Passive scanning

0x01: Active scanning

Own_Address_Type

1 byte

If Privacy is disabled, then the scanner address is set as-

0x00: Public Device address (default)

0x01: Random Device Address

If Privacy is enabled, then the scanner address is set as-

0x02 : Private Resolvable address

0x03 : Non Resolvable Address

filterDuplicates

1 byte

0x00: Do not filter the duplicates (default)

0x01: Filter duplicates

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