PM0237 datasheet(58/88 Pages) STMICROELECTRONICS

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Design an application using BlueNRG, BlueNRG-MS ACI APIs

PM0237

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DocID027104 Rev 2

Conn_Latency: 0 (Slave latency for the connection in a number of

connection events);

Supervision_Timeout: 60 (Supervision timeout for the LE Link);

Conn_Len_Min: 2000 (Minimum length of connection needed for the LE

connection);

Conn_Len_Max: 2000 (Maximum length of connection needed for the LE

connection).

ret = aci_gap_create_connection(0x4000, 0x4000, PUBLIC_ADDR,

GAP_Peripheral_address,

PUBLIC_ADDR, 40, 40, 0, 60, 2000 , 2000);

if (ret != BLE_STATUS_SUCCESS) PRINTF("Failure.\n")}

} /* end GAP_Peripheral_Make_Discoverable() */

Note:

1. If ret = BLE_STATUS_SUCCESS is returned, on termination of the GAP procedure, a

EVT_LE_CONN_COMPLETE

event is returned, on the HCI_Event_CB() event callback, to

indicate that a connection has been established with the GAP_Peripheral_address (same

event is returned on the GAP peripheral device).

2. The connection procedure can be explicitly terminated by issuing the command

aci_gap_terminate_gap_procedure().

3. The last two parameters Conn_Len_Min and Conn_Len_Max of the

aci_gap_create_connection

() are the length of the connection event needed for the

BLE connection. These parameters allows user to specify the amount of time the master

has to allocate for a single slave so they must be wisely choosen.

In particular, when a master connects to more slaves, the connection interval for each slave

must be equal or a multiple of the other connection intervals and user must not overdo the

connection event length for each slave.

3.4.2

Set discoverable mode & use general discovery procedure (active

scan)

The following pseudocode example illustrates only the specific steps to be followed for

putting a GAP Peripheral device in general discoverable mode, and for a GAP central

device to start a general discovery procedure in order to discover devices within its radio

range.

/* GAP Peripheral:

general discoverable mode (scan responses are sent):

Note:

It is assumed that the device public address has been set during the initialization phase as

follows:

uint8_t bdaddr[] = {0x12, 0x34, 0x00, 0xE1, 0x80, 0x02};

ret = aci_hal_write_config_data(CONFIG_DATA_PUBADDR_OFFSET,

CONFIG_DATA_PUBADDR_LEN,

bdaddr);

if (ret != BLE_STATUS_SUCCESS) PRINTF("Failure.\n")}

void GAP_Peripheral_Make_Discoverable(void )

{

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