nrf52832sdk15。2。0蓝牙主模式工作过程分析（uart官网实例）

　　目的
　　如何在从模式的工程增加一个蓝牙主模式服务，方便快速了解工程的整合，本例是在ble外设的uart蓝牙实例上添加来
　　介绍的
　　添加步骤
　　step 1:
　　在nRF_BLE目录中添加nrf_ble_scan.c和ble_db_discovery.c两个文件，在nRF_BLE_Services目录下添加
　　ble_nus_c.c文件
　　step 2:
　　在C/C++选项的Include Paths中,添加以下路径
　　step 3:
　　在main.c中加入头文件
　　#include ＂ble_db_discovery.h＂
　　#include ＂ble_nus_c.h＂
　　#include ＂nrf_ble_scan.h＂
　　#include ＂ble_advdata.h＂
　　step 4:
　　定义以下几个变量
　　BLE_NUS_C_DEF(m_ble_nus_c); /**< BLE Nordic UART Service (NUS) client instance. */
　　BLE_DB_DISCOVERY_DEF(m_db_disc); /**< Database discovery module instance. */
　　NRF_BLE_SCAN_DEF(m_scan); /**< Scanning Module instance. */
　　/**@brief NUS UUID. */
　　static ble_uuid_t const m_nus_uuid =
　　{
　　.uuid = BLE_UUID_NUS_SERVICE,
　　.type = NUS_SERVICE_UUID_TYPE
　　};
　　static uint16_t m_center_handle = BLE_CONN_HANDLE_INVALID;
　　step 5:
　　在sdk_config.h中加入宏,注意红色字体的内容
　　//  主扫描设置 //  BLE_DB_DISCOVERY_ENABLED  - ble_db_discovery - Database discovery module    #ifndef BLE_DB_DISCOVERY_ENABLED #define BLE_DB_DISCOVERY_ENABLED 1 #endif   //  NRF_BLE_SCAN_ENABLED - nrf_ble_scan - Scanning Module //========================================================== #ifndef NRF_BLE_SCAN_ENABLED #define NRF_BLE_SCAN_ENABLED 1 #endif //  NRF_BLE_SCAN_BUFFER - Data length for an advertising set.  #ifndef NRF_BLE_SCAN_BUFFER #define NRF_BLE_SCAN_BUFFER 31 #endif  //  NRF_BLE_SCAN_NAME_MAX_LEN - Maximum size for the name to search in the advertisement report.  #ifndef NRF_BLE_SCAN_NAME_MAX_LEN #define NRF_BLE_SCAN_NAME_MAX_LEN 32 #endif  //  NRF_BLE_SCAN_SHORT_NAME_MAX_LEN - Maximum size of the short name to search for in the advertisement report.  #ifndef NRF_BLE_SCAN_SHORT_NAME_MAX_LEN #define NRF_BLE_SCAN_SHORT_NAME_MAX_LEN 32 #endif  //  NRF_BLE_SCAN_SCAN_INTERVAL - Scanning interval. Determines the scan interval in units of 0.625 millisecond.  #ifndef NRF_BLE_SCAN_SCAN_INTERVAL #define NRF_BLE_SCAN_SCAN_INTERVAL 160 #endif  //  NRF_BLE_SCAN_SCAN_DURATION - Duration of a scanning session in units of 10 ms. Range: 0x0001 - 0xFFFF (10 ms to 10.9225 ms). If set to 0x0000, the scanning continues until it is explicitly disabled.  #ifndef NRF_BLE_SCAN_SCAN_DURATION #define NRF_BLE_SCAN_SCAN_DURATION 0 #endif  //  NRF_BLE_SCAN_SCAN_WINDOW - Scanning window. Determines the scanning window in units of 0.625 millisecond.  #ifndef NRF_BLE_SCAN_SCAN_WINDOW #define NRF_BLE_SCAN_SCAN_WINDOW 80 #endif  //  NRF_BLE_SCAN_MIN_CONNECTION_INTERVAL - Determines minimum connection interval in milliseconds.  #ifndef NRF_BLE_SCAN_MIN_CONNECTION_INTERVAL #define NRF_BLE_SCAN_MIN_CONNECTION_INTERVAL 7.5 #endif  //  NRF_BLE_SCAN_MAX_CONNECTION_INTERVAL - Determines maximum connection interval in milliseconds.  #ifndef NRF_BLE_SCAN_MAX_CONNECTION_INTERVAL #define NRF_BLE_SCAN_MAX_CONNECTION_INTERVAL 30 #endif  //  NRF_BLE_SCAN_SLAVE_LATENCY - Determines the slave latency in counts of connection events.  #ifndef NRF_BLE_SCAN_SLAVE_LATENCY #define NRF_BLE_SCAN_SLAVE_LATENCY 0 #endif  //  NRF_BLE_SCAN_SUPERVISION_TIMEOUT - Determines the supervision time-out in units of 10 millisecond.  #ifndef NRF_BLE_SCAN_SUPERVISION_TIMEOUT #define NRF_BLE_SCAN_SUPERVISION_TIMEOUT 4000 #endif  //  NRF_BLE_SCAN_SCAN_PHY  - PHY to scan on.   // <0=> BLE_GAP_PHY_AUTO  // <1=> BLE_GAP_PHY_1MBPS  // <2=> BLE_GAP_PHY_2MBPS  // <4=> BLE_GAP_PHY_CODED  // <255=> BLE_GAP_PHY_NOT_SET   #ifndef NRF_BLE_SCAN_SCAN_PHY #define NRF_BLE_SCAN_SCAN_PHY 1 #endif  //  NRF_BLE_SCAN_FILTER_ENABLE - Enabling filters for the Scanning Module. //========================================================== #ifndef NRF_BLE_SCAN_FILTER_ENABLE #define NRF_BLE_SCAN_FILTER_ENABLE 1 #endif //  NRF_BLE_SCAN_UUID_CNT - Number of filters for UUIDs.  #ifndef NRF_BLE_SCAN_UUID_CNT #define NRF_BLE_SCAN_UUID_CNT 1 #endif  //  NRF_BLE_SCAN_NAME_CNT - Number of name filters.  #ifndef NRF_BLE_SCAN_NAME_CNT #define NRF_BLE_SCAN_NAME_CNT 0 #endif  //  NRF_BLE_SCAN_SHORT_NAME_CNT - Number of short name filters.  #ifndef NRF_BLE_SCAN_SHORT_NAME_CNT #define NRF_BLE_SCAN_SHORT_NAME_CNT 0 #endif  //  NRF_BLE_SCAN_ADDRESS_CNT - Number of address filters.  #ifndef NRF_BLE_SCAN_ADDRESS_CNT #define NRF_BLE_SCAN_ADDRESS_CNT 0 #endif  //  NRF_BLE_SCAN_APPEARANCE_CNT - Number of appearance filters.  #ifndef NRF_BLE_SCAN_APPEARANCE_CNT #define NRF_BLE_SCAN_APPEARANCE_CNT 0 #endif   //  //  // 
　　//  BLE_NUS_C_ENABLED - ble_nus_c - Nordic UART Central Service
　　#ifndef BLE_NUS_C_ENABLED
　　#define BLE_NUS_C_ENABLED 1
　　#endif
　　//  Requested BLE GAP data length to be negotiated.
　　#ifndef NRF_SDH_BLE_GAP_DATA_LENGTH
　　#define NRF_SDH_BLE_GAP_DATA_LENGTH 251
　　#endif
　　//  NRF_SDH_BLE_PERIPHERAL_LINK_COUNT - Maximum number of peripheral links.
　　#ifndef NRF_SDH_BLE_PERIPHERAL_LINK_COUNT
　　#define NRF_SDH_BLE_PERIPHERAL_LINK_COUNT 1
　　#endif
　　//  NRF_SDH_BLE_CENTRAL_LINK_COUNT - Maximum number of central links.
　　#ifndef NRF_SDH_BLE_CENTRAL_LINK_COUNT
　　#define NRF_SDH_BLE_CENTRAL_LINK_COUNT 1
　　#endif
　　//  NRF_SDH_BLE_TOTAL_LINK_COUNT - Total link count.
　　// Maximum number of total concurrent connections using the default configuration.
　　#ifndef NRF_SDH_BLE_TOTAL_LINK_COUNT
　　#define NRF_SDH_BLE_TOTAL_LINK_COUNT 2
　　#endif
　　//  NRF_SDH_BLE_GAP_EVENT_LENGTH - GAP event length.
　　// The time set aside for this connection on every connection interval in 1.25 ms units.
　　#ifndef NRF_SDH_BLE_GAP_EVENT_LENGTH
　　#define NRF_SDH_BLE_GAP_EVENT_LENGTH 6
　　#endif
　　//  NRF_SDH_BLE_GATT_MAX_MTU_SIZE - Static maximum MTU size.
　　#ifndef NRF_SDH_BLE_GATT_MAX_MTU_SIZE
　　#define NRF_SDH_BLE_GATT_MAX_MTU_SIZE 247
　　#endif
　　//  NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE - Attribute Table size in bytes. The size must be a multiple of 4.
　　#ifndef NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE
　　#define NRF_SDH_BLE_GATTS_ATTR_TAB_SIZE 1408
　　#endif
　　//  NRF_SDH_BLE_VS_UUID_COUNT - The number of vendor-specific UUIDs.
　　#ifndef NRF_SDH_BLE_VS_UUID_COUNT
　　#define NRF_SDH_BLE_VS_UUID_COUNT 1
　　#endif
　　//  NRF_SDH_BLE_SERVICE_CHANGED - Include the Service Changed characteristic in the Attribute Table.
　　#ifndef NRF_SDH_BLE_SERVICE_CHANGED
　　#define NRF_SDH_BLE_SERVICE_CHANGED 0
　　#endif
　　//  Enable/disable central-specific Peer Manager functionality.
　　#ifndef PM_CENTRAL_ENABLED
　　#define PM_CENTRAL_ENABLED 1
　　#endif
　　// 
　　//
　　step 6:
　　在main.c中ble_evt_handler函数中加入代码，见红色字体
　　/**@brief Function for handling BLE events.
　　*
　　* @param[in] p_ble_evt Bluetooth stack event.
　　* @param[in] p_context Unused.
　　*/
　　static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
　　{
　　uint32_t err_code;
　　uint16_t conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
　　uint16_t role = ble_conn_state_role(conn_handle);
　　switch (p_ble_evt->header.evt_id)
　　{
　　case BLE_GAP_EVT_CONNECTED:
　　// Based on the role this device plays in the connection, dispatch to the right handler.
　　if (role == BLE_GAP_ROLE_PERIPH)
　　{
　　NRF_LOG_INFO(＂Connected＂);
　　m_conn_handle = conn_handle;
　　err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
　　APP_ERROR_CHECK(err_code);
　　}
　　else if (role == BLE_GAP_ROLE_CENTRAL)
　　{
　　m_center_handle = conn_handle;
　　err_code = ble_nus_c_handles_assign(&m_ble_nus_c, m_center_handle, NULL);
　　APP_ERROR_CHECK(err_code);
　　// start discovery of services. The NUS Client waits for a discovery result
　　err_code = ble_db_discovery_start(&m_db_disc, m_center_handle);
　　APP_ERROR_CHECK(err_code);
　　}
　　break;
　　case BLE_GAP_EVT_DISCONNECTED:
　　NRF_LOG_INFO(＂Disconnected＂);
　　// LED indication will be changed when advertising starts.
　　if (role == BLE_GAP_ROLE_PERIPH)
　　{
　　m_conn_handle = BLE_CONN_HANDLE_INVALID;
　　}
　　else if (role == BLE_GAP_ROLE_CENTRAL)
　　{
　　m_center_handle = BLE_CONN_HANDLE_INVALID;
　　}
　　break;
　　case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
　　{
　　NRF_LOG_DEBUG(＂PHY update request.＂);
　　ble_gap_phys_t const phys =
　　{
　　.rx_phys = BLE_GAP_PHY_AUTO,
　　.tx_phys = BLE_GAP_PHY_AUTO,
　　};
　　err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
　　APP_ERROR_CHECK(err_code);
　　} break;
　　case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
　　// Pairing not supported
　　err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
　　APP_ERROR_CHECK(err_code);
　　break;
　　case BLE_GATTS_EVT_SYS_ATTR_MISSING:
　　// No system attributes have been stored.
　　err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
　　APP_ERROR_CHECK(err_code);
　　break;
　　case BLE_GATTC_EVT_TIMEOUT:
　　// Disconnect on GATT Client timeout event.
　　err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle,
　　BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
　　APP_ERROR_CHECK(err_code);
　　break;
　　case BLE_GATTS_EVT_TIMEOUT:
　　// Disconnect on GATT Server timeout event.
　　err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle,
　　BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
　　APP_ERROR_CHECK(err_code);
　　break;
　　default:
　　// No implementation needed.
　　break;
　　}
　　}
　　step 7:
　　在main.c中加入扫描数据报告代码
　　typedef struct
　　{
　　uint8_t addr[6];
　　uint8_t data[32];
　　uint8_t len;
　　int8_t rssi;
　　}SCAN_DATA_INFO;
　　SCAN_DATA_INFO scanInfo[16];
　　uint8_t scanTotal;
　　void clearScanInfo(void)
　　{
　　for(uint8_t i=0;iparams.p_not_found->peer_addr.addr[j])
　　{
　　if(++flag>=6)
　　{
　　return 0;
　　}
　　}
　　}
　　}
　　return 1;
　　}
　　/**@brief Function for handling Scanning Module events.
　　*/
　　static void scan_evt_handler(scan_evt_t const * p_scan_evt)
　　{
　　ret_code_t err_code;
　　uint16_t data_offset = 0;
　　uint8_t i;
　　switch(p_scan_evt->scan_evt_id)
　　{
　　case NRF_BLE_SCAN_EVT_CONNECTING_ERROR:
　　{
　　err_code = p_scan_evt->params.connecting_err.err_code;
　　APP_ERROR_CHECK(err_code);
　　} break;
　　case NRF_BLE_SCAN_EVT_NOT_FOUND:
　　if(scanTotal < 16)
　　{
　　if(searchMac(p_scan_evt))
　　{
　　scanInfo[scanTotal].len = ble_advdata_search(p_scan_evt->params.p_not_found->data.p_data,
　　p_scan_evt->params.p_not_found->data.len,
　　&data_offset,
　　BLE_GAP_AD_TYPE_COMPLETE_LOCAL_NAME);
　　if(scanInfo[scanTotal].len == 0)
　　break;
　　strncpy((char*)scanInfo[scanTotal].data,(const char*)&p_scan_evt->params.p_not_found
　　->data.p_data[data_offset],scanInfo[scanTotal].len);
　　scanInfo[scanTotal].rssi = p_scan_evt->params.p_not_found->rssi;
　　for(i=0;i<6;i++)
　　{
　　scanInfo[scanTotal].addr[i] = p_scan_evt->params.p_not_found->peer_addr.addr[i];
　　}
　　for(uint8_t j=0;jparams.connected.p_connected;
　　// Scan is automatically stopped by the connection.
　　NRF_LOG_INFO(＂Connecting to target %02x%02x%02x%02x%02x%02x＂,
　　p_connected->peer_addr.addr[0],
　　p_connected->peer_addr.addr[1],
　　p_connected->peer_addr.addr[2],
　　p_connected->peer_addr.addr[3],
　　p_connected->peer_addr.addr[4],
　　p_connected->peer_addr.addr[5]
　　);
　　clearScanInfo();
　　} break;
　　case NRF_BLE_SCAN_EVT_SCAN_TIMEOUT:
　　{
　　NRF_LOG_INFO(＂Scan timed out.＂);
　　scan_start();
　　} break;
　　default:
　　break;
　　}
　　}
　　step 8:
　　在main.c中定义定时器变量及定时事件函数
　　#define TICK_1HZ_INTERVAL APP_TIMER_TICKS(1000)
　　APP_TIMER_DEF(m_1hz_id);
　　static volatile uint8_t tickFlag;
　　/**@brief Function for handling the Battery measurement timer timeout.
　　*
　　* @details This function will be called each time the battery level measurement timer expires.
　　*
　　* @param[in] p_context Pointer used for passing some arbitrary information (context) from the
　　* app_start_timer() call to the timeout handler.
　　*/
　　static void tick_1hz_timeout_handler(void * p_context)
　　{
　　UNUSED_PARAMETER(p_context);
　　tickFlag = 1;
　　}
　　/**@brief Function for starting application timers.
　　*/
　　static void application_timers_start(void)
　　{
　　ret_code_t err_code;
　　// Start application timers.
　　err_code = app_timer_start(m_1hz_id, TICK_1HZ_INTERVAL, NULL);
　　APP_ERROR_CHECK(err_code);
　　}
　　/**@brief Function for initializing the timer module.
　　*/
　　static void timers_init(void)
　　{
　　ret_code_t err_code = app_timer_init();
　　APP_ERROR_CHECK(err_code);
　　err_code = app_timer_create(&m_1hz_id,
　　APP_TIMER_MODE_REPEATED,
　　tick_1hz_timeout_handler);
　　APP_ERROR_CHECK(err_code);
　　}
　　step 9:
　　在main.c中的ble_nus_chars_received_uart_print函数打印数据
　　/**@brief Function for handling characters received by the Nordic UART Service (NUS).
　　*
　　* @details This function takes a list of characters of length data_len and prints the characters out on UART.
　　* If @ref ECHOBACK_BLE_UART_DATA is set, the data is sent back to sender.
　　*/
　　static void ble_nus_chars_received_uart_print(uint8_t * p_data, uint16_t data_len)
　　{
　　for (uint32_t i = 0; i < data_len; i++)
　　{
　　printf(＂%02x ＂,p_data[i]);
　　}
　　printf(＂ ＂);
　　}
　　step 10:
　　在main函数中初时化及定时发送数据
　　static uint32_t tick;
　　static uint8_t sendBuf[4];
　　static uint16_t len = 4;
　　/**@brief Application main function.
　　*/
　　int main(void)
　　{
　　// Initialize.
　　uart_init();
　　log_init();
　　timers_init();
　　power_management_init();
　　ble_stack_init();
　　db_discovery_init();
　　scan_init();
　　gap_params_init();
　　gatt_init();
　　conn_params_init();
　　nus_c_init();
　　services_init();
　　advertising_init();
　　// Start execution.
　　printf(＂r UART started.r ＂);
　　scan_start();
　　advertising_start();
　　application_timers_start();
　　// Enter main loop.
　　for (;;)
　　{
　　if(tickFlag)
　　{
　　tickFlag = 0;
　　if(m_center_handle != BLE_CONN_HANDLE_INVALID)
　　{
　　tick++;
　　sendBuf[0] = (tick>>24) & 0xff;
　　sendBuf[1] = (tick>>16) & 0xff;
　　sendBuf[2] = (tick>>8) & 0xff;
　　sendBuf[3] = tick & 0xff;
　　ble_nus_c_string_send(&m_ble_nus_c,sendBuf,len);
　　}
　　}
　　else
　　{
　　idle_state_handle();
　　}
　　}
　　}
　　step 11:
　　RAM地址设置
　　Demo下载地址：https://download.csdn.net/download/mygod2008ok/11162759