/**@brief Function for searching a UUID in the advertisement packets.
*
* @details Use this function to parse received advertising data and to find a given
* UUID in them.
*
* @param[in] p_adv_report advertising data to parse.
* @param[in] uuid_to_find UUIID to search.
* @return true if the given UUID was found, false otherwise.
*/
static bool find_adv_uuid(const ble_gap_evt_adv_report_t *p_adv_report, const uint16_t uuid_to_find)
{
uint32_t err_code;
data_t adv_data;
data_t type_data;
// Initialize advertisement report for parsing.
adv_data.p_data = (uint8_t *)p_adv_report->data;
adv_data.data_len = p_adv_report->dlen;
err_code = adv_report_parse(BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_MORE_AVAILABLE,
&adv_data,
&type_data);
if (err_code != NRF_SUCCESS)
{
// Look for the services in 'complete' if it was not found in 'more available'.
err_code = adv_report_parse(BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_COMPLETE,
&adv_data,
&type_data);
if (err_code != NRF_SUCCESS)
{
// If we can't parse the data, then exit.
return false;
}
}
// Verify if any UUID match the given UUID.
for (uint32_t u_index = 0; u_index < (type_data.data_len / UUID16_SIZE); u_index++)
{
uint16_t extracted_uuid;
UUID16_EXTRACT(&extracted_uuid, &type_data.p_data[u_index * UUID16_SIZE]);
if (extracted_uuid == uuid_to_find)
{
return true;
}
}
return false;
}
/**@brief Function for handling the Application's BLE Stack events.
*
* @param[in] p_ble_evt Bluetooth stack event.
*/
static void on_ble_evt(ble_evt_t * p_ble_evt)
{
uint32_t err_code;
const ble_gap_evt_t * p_gap_evt = &p_ble_evt->evt.gap_evt;
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_ADV_REPORT:
{
data_t adv_data;
data_t type_data;
// Initialize advertisement report for parsing.
adv_data.p_data = (uint8_t *)p_gap_evt->params.adv_report.data;
adv_data.data_len = p_gap_evt->params.adv_report.dlen;
err_code = adv_report_parse(BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_MORE_AVAILABLE,
&adv_data,
&type_data);
if (err_code != NRF_SUCCESS)
{
// Compare short local name in case complete name does not match.
err_code = adv_report_parse(BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_COMPLETE,
&adv_data,
&type_data);
}
// Verify if short or complete name matches target.
if (err_code == NRF_SUCCESS)
{
uint16_t extracted_uuid;
// UUIDs found, look for matching UUID
for (uint32_t u_index = 0; u_index < (type_data.data_len/UUID16_SIZE); u_index++)
{
UUID16_EXTRACT(&extracted_uuid,&type_data.p_data[u_index * UUID16_SIZE]);
APPL_LOG("\t[APPL]: %x\r\n",extracted_uuid);
if(extracted_uuid == TARGET_UUID)
{
// Stop scanning.
err_code = sd_ble_gap_scan_stop();
if (err_code != NRF_SUCCESS)
{
APPL_LOG("[APPL]: Scan stop failed, reason %d\r\n", err_code);
}
err_code = bsp_indication_set(BSP_INDICATE_IDLE);
APP_ERROR_CHECK(err_code);
m_scan_param.selective = 0;
// Initiate connection.
err_code = sd_ble_gap_connect(&p_gap_evt->params.adv_report.peer_addr,
&m_scan_param,
&m_connection_param);
m_whitelist_temporarily_disabled = false;
if (err_code != NRF_SUCCESS)
{
APPL_LOG("[APPL]: Connection Request Failed, reason %d\r\n", err_code);
}
break;
}
}
}
break;
}
case BLE_GAP_EVT_TIMEOUT:
if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_SCAN)
{
APPL_LOG("[APPL]: Scan timed out.\r\n");
scan_start();
}
else if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN)
{
APPL_LOG("[APPL]: Connection Request timed out.\r\n");
}
break;
case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST:
// Accepting parameters requested by peer.
err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle,
&p_gap_evt->params.conn_param_update_request.conn_params);
APP_ERROR_CHECK(err_code);
break;
default:
break;
}
}
/**@brief Function for handling the Application's BLE Stack events.
*
* @param[in] p_ble_evt Bluetooth stack event.
*/
static void on_ble_central_evt(ble_evt_t * p_ble_evt)
{
uint32_t err_code;
const ble_gap_evt_t * p_gap_evt = &p_ble_evt->evt.gap_evt;
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_ADV_REPORT:
{
data_t adv_data;
data_t type_data;
// Initialize advertisement report for parsing.
adv_data.p_data = (uint8_t *)p_gap_evt->params.adv_report.data;
adv_data.data_len = p_gap_evt->params.adv_report.dlen;
err_code = adv_report_parse(BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_MORE_AVAILABLE,
&adv_data,
&type_data);
if (err_code != NRF_SUCCESS)
{
// Look for the services in 'complete' if it was not found in 'more available'.
err_code = adv_report_parse(BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_COMPLETE,
&adv_data,
&type_data);
}
// Verify if short or complete name matches target.
if (err_code == NRF_SUCCESS)
{
uint16_t extracted_uuid;
// UUIDs found, look for matching UUID
for (uint32_t u_index = 0; u_index < (type_data.data_len/UUID16_SIZE); u_index++)
{
UUID16_EXTRACT(&extracted_uuid,&type_data.p_data[u_index * UUID16_SIZE]);
APPL_LOG("\t[APPL]: %x\r\n",extracted_uuid);
if(extracted_uuid == BLE_UUID_HEART_RATE_SERVICE || extracted_uuid == BLE_UUID_RUNNING_SPEED_AND_CADENCE)
{
if(extracted_uuid == BLE_UUID_HEART_RATE_SERVICE)
{
printf("HRS found\n\r");
memcpy(&m_hrs_peripheral_address, &p_gap_evt->params.adv_report.peer_addr,sizeof(ble_gap_addr_t));
}
if(extracted_uuid == BLE_UUID_RUNNING_SPEED_AND_CADENCE)
{
printf("RSC found\n\r");
memcpy(&m_rscs_peripheral_address, &p_gap_evt->params.adv_report.peer_addr,sizeof(ble_gap_addr_t));
}
m_scan_param.selective = 0;
// Initiate connection.
err_code = sd_ble_gap_connect(&p_gap_evt->params.adv_report.peer_addr,
&m_scan_param,
&m_connection_param);
m_whitelist_temporarily_disabled = false;
if (err_code != NRF_SUCCESS)
{
APPL_LOG("[APPL]: Connection Request Failed, reason %d\r\n", err_code);
}
break;
}
}
}
break;
}
case BLE_GAP_EVT_TIMEOUT:
if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_SCAN)
{
APPL_LOG("[APPL]: Scan timed out.\r\n");
scan_start();
}
else if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN)
{
APPL_LOG("[APPL]: Connection Request timed out.\r\n");
}
break;
case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST:
// Accepting parameters requested by peer.
err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle,
&p_gap_evt->params.conn_param_update_request.conn_params);
APP_ERROR_CHECK(err_code);
break;
case BLE_GAP_EVT_DISCONNECTED:
/*
if(p_gap_evt->conn_handle == m_conn_handle_central_hrs)
{
m_conn_handle_central_hrs = BLE_CONN_HANDLE_INVALID;
}
else if(p_gap_evt->conn_handle == m_conn_handle_central_rsc)
{
m_conn_handle_central_rsc = BLE_CONN_HANDLE_INVALID;
}
if((m_conn_handle_central_rsc == BLE_CONN_HANDLE_INVALID) &&
(m_conn_handle_central_hrs == BLE_CONN_HANDLE_INVALID))
{
LEDS_OFF(CENTRAL_CONNECTED_LED);
}
*/
break;
default:
break;
}
}
/**@brief Function for handling BLE Stack events concerning central applications.
*
* @details This function keeps the connection handles of central applications up-to-date. It
* parses scanning reports, initiating a connection attempt to peripherals when a target UUID
* is found, and manages connection parameter update requests. Additionally, it updates the status
* of LEDs used to report central applications activity.
*
* @note Since this function updates connection handles, @ref BLE_GAP_EVT_DISCONNECTED events
* should be dispatched to the target application before invoking this function.
*
* @param[in] p_ble_evt Bluetooth stack event.
*/
static void on_ble_central_evt(const ble_evt_t * const p_ble_evt)
{
// The addresses of peers we attempted to connect to.
static ble_gap_addr_t periph_addr_hrs;
static ble_gap_addr_t periph_addr_rsc;
// For readability.
const ble_gap_evt_t * const p_gap_evt = &p_ble_evt->evt.gap_evt;
switch (p_ble_evt->header.evt_id)
{
/** Upon connection, check which peripheral has connected (HR or RSC), initiate DB
* discovery, update LEDs status and resume scanning if necessary. */
case BLE_GAP_EVT_CONNECTED:
{
uint32_t err_code;
// For readability.
const ble_gap_addr_t * const peer_addr = &p_gap_evt->params.connected.peer_addr;
/** Check which peer has connected, save the connection handle and initiate DB discovery.
* DB discovery will invoke a callback (hrs_c_evt_handler and rscs_c_evt_handler)
* upon completion, which is used to enable notifications from the peer. */
if(memcmp(&periph_addr_hrs, peer_addr, sizeof(ble_gap_addr_t)) == 0)
{
NRF_LOG_PRINTF("HRS central connected\r\n");
// Reset the peer address we had saved.
memset(&periph_addr_hrs, 0, sizeof(ble_gap_addr_t));
m_conn_handle_hrs_c = p_gap_evt->conn_handle;
NRF_LOG_PRINTF("Starting DB discovery for HRS\r\n");
err_code = ble_db_discovery_start(&m_ble_db_discovery_hrs, p_gap_evt->conn_handle);
APP_ERROR_CHECK(err_code);
}
else if(memcmp(&periph_addr_rsc, peer_addr, sizeof(ble_gap_addr_t)) == 0)
{
NRF_LOG_PRINTF("RSC central connected\r\n");
// Reset the peer address we had saved.
memset(&periph_addr_rsc, 0, sizeof(ble_gap_addr_t));
m_conn_handle_rscs_c = p_gap_evt->conn_handle;
NRF_LOG_PRINTF("Starting DB discovery for RSCS\r\n");
err_code = ble_db_discovery_start(&m_ble_db_discovery_rsc, p_gap_evt->conn_handle);
APP_ERROR_CHECK(err_code);
}
/** Update LEDs status, and check if we should be looking for more
* peripherals to connect to. */
LEDS_ON(CENTRAL_CONNECTED_LED);
if (ble_conn_state_n_centrals() == MAX_CONNECTED_CENTRALS)
{
LEDS_OFF(CENTRAL_SCANNING_LED);
}
else
{
// Resume scanning.
LEDS_ON(CENTRAL_SCANNING_LED);
scan_start();
}
} break; // BLE_GAP_EVT_CONNECTED
/** Upon disconnection, reset the connection handle of the peer which disconnected, update
* the LEDs status and start scanning again. */
case BLE_GAP_EVT_DISCONNECTED:
{
uint8_t n_centrals;
if (p_gap_evt->conn_handle == m_conn_handle_hrs_c)
{
NRF_LOG_PRINTF("HRS central disconnected (reason: %d)\r\n",
p_gap_evt->params.disconnected.reason);
m_conn_handle_hrs_c = BLE_CONN_HANDLE_INVALID;
}
else if(p_gap_evt->conn_handle == m_conn_handle_rscs_c)
{
NRF_LOG_PRINTF("RSC central disconnected (reason: %d)\r\n",
p_gap_evt->params.disconnected.reason);
m_conn_handle_rscs_c = BLE_CONN_HANDLE_INVALID;
}
// Start scanning
// scan_start();
// Update LEDs status.
LEDS_ON(CENTRAL_SCANNING_LED);
n_centrals = ble_conn_state_n_centrals();
if (n_centrals == 0)
{
LEDS_OFF(CENTRAL_CONNECTED_LED);
}
} break; // BLE_GAP_EVT_DISCONNECTED
case BLE_GAP_EVT_ADV_REPORT:
{
uint32_t err_code;
data_t adv_data;
data_t type_data;
// For readibility.
const ble_gap_addr_t * const peer_addr = &p_gap_evt->params.adv_report.peer_addr;
// Initialize advertisement report for parsing.
adv_data.p_data = (uint8_t *)p_gap_evt->params.adv_report.data;
adv_data.data_len = p_gap_evt->params.adv_report.dlen;
err_code = adv_report_parse(BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_MORE_AVAILABLE,
&adv_data,
&type_data);
if (err_code != NRF_SUCCESS)
{
// Look for the services in 'complete' if it was not found in 'more available'.
err_code = adv_report_parse(BLE_GAP_AD_TYPE_16BIT_SERVICE_UUID_COMPLETE,
&adv_data,
&type_data);
if (err_code != NRF_SUCCESS)
{
// If we can't parse the data, then exit.
break;
}
}
// Verify if any UUID match the Heart rate or Running speed and cadence services.
for (uint32_t u_index = 0; u_index < (type_data.data_len / UUID16_SIZE); u_index++)
{
bool do_connect = false;
uint16_t extracted_uuid;
UUID16_EXTRACT(&extracted_uuid, &type_data.p_data[u_index * UUID16_SIZE]);
/** We do not want to connect to two peripherals offering the same service, so when
* a UUID is matched, we check that we are not already connected to a peer which
* offers the same service. We then save the peer address, so that upon connection
* we can tell which peer has connected and update its respective connection
* handle. */
if ((extracted_uuid == BLE_UUID_HEART_RATE_SERVICE) &&
(m_conn_handle_hrs_c == BLE_CONN_HANDLE_INVALID))
{
do_connect = true;
memcpy(&periph_addr_hrs, peer_addr, sizeof(ble_gap_addr_t));
}
else if ((extracted_uuid == BLE_UUID_RUNNING_SPEED_AND_CADENCE) &&
(m_conn_handle_rscs_c == BLE_CONN_HANDLE_INVALID))
{
do_connect = true;
memcpy(&periph_addr_rsc, peer_addr, sizeof(ble_gap_addr_t));
}
if (do_connect)
{
// Initiate connection.
err_code = sd_ble_gap_connect(peer_addr, &m_scan_param, &m_connection_param);
if (err_code != NRF_SUCCESS)
{
APPL_LOG("[APPL]: Connection Request Failed, reason %d\r\n", err_code);
}
}
}
} break; // BLE_GAP_ADV_REPORT
case BLE_GAP_EVT_TIMEOUT:
{
// We have not specified a timeout for scanning, so only connection attemps can timeout.
if (p_gap_evt->params.timeout.src == BLE_GAP_TIMEOUT_SRC_CONN)
{
APPL_LOG("[APPL]: Connection Request timed out.\r\n");
}
} break; // BLE_GAP_EVT_TIMEOUT
case BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST:
{
// Accept parameters requested by peer.
ret_code_t err_code;
err_code = sd_ble_gap_conn_param_update(p_gap_evt->conn_handle,
&p_gap_evt->params.conn_param_update_request.conn_params);
APP_ERROR_CHECK(err_code);
} break; // BLE_GAP_EVT_CONN_PARAM_UPDATE_REQUEST
default:
// No implementation needed.
break;
}
}
