UM1865 datasheet(52/132 Pages) STMICROELECTRONICS

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Vendor specific commands

UM1865

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DocID027514 Rev 1

4.3.28

Aci_Gap_Start_General_Conn_Establishment

Start a general connection establishment procedure. The host enables scanning in the

controller with the scanner filter policy set to “accept all advertising packets” and from the

scanning results, all the devices are sent to the upper layer using the event

LE_Advertising_Report. The upper layer then has to select one of the devices to which it

wants to connect by issuing the command Aci_Gap_Create_Connection. If privacy is

enabled, then either a private resolvable address or a non resolvable address, based on the

address type specified in the command is set as the scanner address but the gap create

connection always uses a private resolvable address if the general connection

establishment procedure is active..

Table 89. Aci_Gap_Start_General_Conn_Establishment

Command name

Parameters

Return

Aci_Gap_Start_General_Conn_Establishment

(0xFC9A)

Scan_Type

Scan_Interval

Scan_Window

Own_Address_Type

filterDuplicates

Status

Table 90. Aci_Gap_Start_General_Conn_Establishment command parameters

Parameter

Size

Description

Scan_Type

1 byte

0x00: Passive scanning

0x01: Active scanning

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.

Own_Address_Type

1 byte

If Privacy is disabled, then the scanner address should be set as

0x00: Public Device address (default)

0x01: Random Device Address

If Privacy is enabled, then the scanner address should be 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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