主要来自http://www.cnblogs.com/bhlsheji/p/5340092.html
ble_app_proximity 程序，事实上跟防丢有关的程序
打开sdk包路径：D:\myfile\test\examples\ble_peripheral\ble_app_proximity\pca10028\s130\arm5_no_packs
1. TX Power Service 发射功率服务 ：
该服务主要条件蓝牙的发射功率，从而影响设备与手机蓝牙通信距离 ：
/**@brief Function for initializing the TX Power Service.
#define TX_POWER_LEVEL (0)
static void tps_init(void) { uint32_t err_code; ble_tps_init_t tps_init_obj;
memset(&tps_init_obj, 0, sizeof(tps_init_obj)); tps_init_obj.initial_tx_power_level = TX_POWER_LEVEL;
BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(&tps_init_obj.tps_attr_md.read_perm); BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS(&tps_init_obj.tps_attr_md.write_perm);
err_code = ble_tps_init(&m_tps, &tps_init_obj); APP_ERROR_CHECK(err_code); }
TX_POWER_LEVEL的范围 是4 到-20db 随着数据的减小，通信距离变短
2.Immediate Alert Service 即时报警服务
该服务能够通过手机APP 找到设备 蓝牙建立连接之后，在手机的 APP中有 Find Mebutton有效，按下Find Me ，开发板的灯会亮，这个时候 Find Mebutton 变成Silent Mebutton ,在按下Silent Mebutton 相应灯会灭，相比5介绍的Immediate Alert Service client 是一个相反的寻找方式。
/**@brief Function for initializing the Immediate Alert Service. */ static void ias_init(void) { uint32_t err_code; ble_ias_init_t ias_init_obj;
memset(&ias_init_obj, 0, sizeof(ias_init_obj)); ias_init_obj.evt_handler = on_ias_evt;
err_code = ble_ias_init(&m_ias, &ias_init_obj); APP_ERROR_CHECK(err_code); }
通过点击手机APP中的 Find Mebutton 或Silent Mebutton切换，会进入函数执行相应的灯ON/OFF，
static void on_ias_evt(ble_ias_t * p_ias, ble_ias_evt_t * p_evt) { switch (p_evt->evt_type) { case BLE_IAS_EVT_ALERT_LEVEL_UPDATED: alert_signal(p_evt->params.alert_level); break;//BLE_IAS_EVT_ALERT_LEVEL_UPDATED default: // No implementation needed. break; } }
通过手机直接控制设备或在蓝牙断开时，设备会执行灯闪烁或报警
/**@brief Function for the Signals alert event from Immediate Alert or Link Loss services. * * @param[in] alert_level Requested alert level. */ static void alert_signal(uint8_t alert_level) { uint32_t err_code; switch (alert_level) { case BLE_CHAR_ALERT_LEVEL_NO_ALERT: err_code = bsp_indication_set(BSP_INDICATE_ALERT_OFF); APP_ERROR_CHECK(err_code); NRF_LOG_DEBUG("BLE_CHAR_ALERT_LEVEL_NO_ALERT\r\n"); break;//BLE_CHAR_ALERT_LEVEL_NO_ALERT case BLE_CHAR_ALERT_LEVEL_MILD_ALERT: err_code = bsp_indication_set(BSP_INDICATE_ALERT_0); APP_ERROR_CHECK(err_code); NRF_LOG_DEBUG("BLE_CHAR_ALERT_LEVEL_MILD_ALERT\r\n"); break;//BLE_CHAR_ALERT_LEVEL_MILD_ALERT case BLE_CHAR_ALERT_LEVEL_HIGH_ALERT: NRF_LOG_DEBUG("BLE_CHAR_ALERT_LEVEL_HIGH_ALERT\r\n"); err_code = bsp_indication_set(BSP_INDICATE_ALERT_3); APP_ERROR_CHECK(err_code); break;//BLE_CHAR_ALERT_LEVEL_HIGH_ALERT default: // No implementation needed. break; } }
3.Link Loss Service 连接丢失服务
当连接丢失之后（有可能是电池没电或者分离APP太远）都会导致连接丢失事件，丢失后会通过通知的方式发送到手机APP，手机依据
该事件做出响应， 程序中使用通知的方式显示出来，
/**@brief Function for initializing the Link Loss Service. */ static void lls_init(void) { uint32_t err_code; ble_lls_init_t lls_init_obj;
// Initialize Link Loss Service memset(&lls_init_obj, 0, sizeof(lls_init_obj));
lls_init_obj.evt_handler = on_lls_evt; lls_init_obj.error_handler = service_error_handler; lls_init_obj.initial_alert_level = INITIAL_LLS_ALERT_LEVEL;
BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(&lls_init_obj.lls_attr_md.read_perm); BLE_GAP_CONN_SEC_MODE_SET_ENC_NO_MITM(&lls_init_obj.lls_attr_md.write_perm);
err_code = ble_lls_init(&m_lls, &lls_init_obj); APP_ERROR_CHECK(err_code); }
蓝牙断开或者关机会进入 on_lls_evt 函数中，执行相应的报警或灯的控制
/**@brief Function for handling Link Loss events. * * @details This function will be called for all Link Loss events which are passed to the * application. * * @param[in] p_lls Link Loss structure. * @param[in] p_evt Event received from the Link Loss service. */ static void on_lls_evt(ble_lls_t * p_lls, ble_lls_evt_t * p_evt) { switch (p_evt->evt_type) { case BLE_LLS_EVT_LINK_LOSS_ALERT: alert_signal(p_evt->params.alert_level); break;//BLE_LLS_EVT_LINK_LOSS_ALERT default: // No implementation needed. break; } }
4. Battery Service 电池服务
通过AD采样电池电压，发送到手机APP
5. Immediate Alert Service client -location role of the Find Me profile 定位器服务
该服务能够使用按键报警服务，按键按下，在按键处理程序中设置好报警的级别之后，通过蓝牙发送到手机APP,APP已经报警级别做不同的动作，
程序通过按键控制手机响铃和停止响铃。
/**@brief Function for initializing the immediate alert service client.
static void ias_client_init(void) { uint32_t err_code; ble_ias_c_init_t ias_c_init_obj;
memset(&ias_c_init_obj, 0, sizeof(ias_c_init_obj));
m_is_high_alert_signalled = false;
ias_c_init_obj.evt_handler = on_ias_c_evt; ias_c_init_obj.error_handler = service_error_handler;
err_code = ble_ias_c_init(&m_ias_c, &ias_c_init_obj); APP_ERROR_CHECK(err_code); }
通过按键来控制手机报警，按一下手机报警响，再次按下手机报警关
/**@brief Function for initializing buttons and leds. * * @param[out] p_erase_bonds Will be true if the clear bonding button was pressed to wake the application up. */ static void buttons_leds_init(bool * p_erase_bonds) { bsp_event_t startup_event; uint32_t err_code = bsp_init(BSP_INIT_LED|BSP_INIT_BUTTONS, APP_TIMER_TICKS(100, APP_TIMER_PRESCALER), bsp_event_handler);//BSP_INIT_LED |BSP_INIT_BUTTONS, APP_ERROR_CHECK(err_code); err_code = bsp_btn_ble_init(NULL, &startup_event); APP_ERROR_CHECK(err_code); *p_erase_bonds = (startup_event == BSP_EVENT_CLEAR_BONDING_DATA); }
/**@brief Function for handling events from the BSP module. * * @param[in] event Event generated when button is pressed. */ static void bsp_event_handler(bsp_event_t event) { uint32_t err_code; switch (event) { case BSP_EVENT_SLEEP: // sleep_mode_enter(); break;//BSP_EVENT_SLEEP case BSP_EVENT_DISCONNECT: err_code = sd_ble_gap_disconnect(m_ias_c.conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION); if (err_code != NRF_ERROR_INVALID_STATE) { APP_ERROR_CHECK(err_code); } break;//BSP_EVENT_DISCONNECT case BSP_EVENT_KEY_0: { if (m_is_ias_present) { if (!m_is_high_alert_signalled) { err_code = ble_ias_c_send_alert_level(&m_ias_c, BLE_CHAR_ALERT_LEVEL_HIGH_ALERT); NRF_LOG_DEBUG("m_is_high_alert_signalled000\r\n"); } else { err_code = ble_ias_c_send_alert_level(&m_ias_c, BLE_CHAR_ALERT_LEVEL_NO_ALERT); NRF_LOG_DEBUG("m_is_high_alert_signalled111\r\n"); } if (err_code == NRF_SUCCESS) { m_is_high_alert_signalled = !m_is_high_alert_signalled; } else if ( (err_code != BLE_ERROR_NO_TX_PACKETS) && (err_code != BLE_ERROR_GATTS_SYS_ATTR_MISSING) && (err_code != NRF_ERROR_NOT_FOUND) ) { APP_ERROR_HANDLER(err_code); } } }break;//BSP_EVENT_KEY_0 case BSP_EVENT_KEY_1: // STOP_ALERTING_BUTTON_ID err_code = bsp_indication_set(BSP_INDICATE_ALERT_OFF); APP_ERROR_CHECK(err_code); break;//BSP_EVENT_KEY_1 default: break; } }
