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402 lines
14 KiB
402 lines
14 KiB
#include <stdint.h>
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#include <string.h>
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#include "kernel.h"
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#include "nordic_common.h"
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#include "nrf.h"
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#include "ble_hci.h"
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#include "ble_advdata.h"
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#include "ble_advertising.h"
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#include "ble_conn_params.h"
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#include "nrf_sdh.h"
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#include "nrf_sdh_soc.h"
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#include "nrf_sdh_ble.h"
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#include "nrf_sdh_rtos.h"
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#include "nrf_ble_gatt.h"
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#include "nrf_ble_qwr.h"
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#include "app_timer.h"
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#include "ble_nus.h"
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#include "ble_dis.h"
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#include "ble_bas.h"
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#include "nrf_log.h"
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#include "nrf_log_ctrl.h"
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#include "nrf_log_default_backends.h"
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#define APP_BLE_CONN_CFG_TAG 1 /**< A tag identifying the SoftDevice BLE configuration. */
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#define DEVICE_NAME "Nordic_UART" /**< Name of device. Will be included in the advertising data. */
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#define NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN /**< UUID type for the Nordic UART Service (vendor specific). */
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#define APP_BLE_OBSERVER_PRIO 3 /**< Application's BLE observer priority. You shouldn't need to modify this value. */
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#define MIN_CONN_INTERVAL MSEC_TO_UNITS(20, UNIT_1_25_MS) /**< Minimum acceptable connection interval (20 ms), Connection interval uses 1.25 ms units. */
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#define MAX_CONN_INTERVAL MSEC_TO_UNITS(75, UNIT_1_25_MS) /**< Maximum acceptable connection interval (75 ms), Connection interval uses 1.25 ms units. */
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#define SLAVE_LATENCY 0 /**< Slave latency. */
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#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds), Supervision Timeout uses 10 ms units. */
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#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
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#define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
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#define MAX_CONN_PARAMS_UPDATE_COUNT 3 /**< Number of attempts before giving up the connection parameter negotiation. */
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#define DEAD_BEEF 0xDEADBEEF /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */
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NRF_BLE_GATT_DEF(m_gatt); /**< GATT module instance. */
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NRF_BLE_QWR_DEF(m_qwr); /**< Context for the Queued Write module.*/
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BLE_ADVERTISING_DEF(m_advertising); /**< Advertising module instance. */
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BLE_BAS_DEF(m_bas);
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BLE_NUS_DEF(m_nus, NRF_SDH_BLE_TOTAL_LINK_COUNT); /**< BLE NUS service instance. */
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static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID; /**< Handle of the current connection. */
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static uint16_t m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - 3; /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */
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static ble_uuid_t m_adv_uuids[] = /**< Universally unique service identifier. */
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{
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{BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE}
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};
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static void nrf_qwr_error_handler(uint32_t nrf_error)
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{
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NRF_LOG_INFO("%s: nrf_error=%d", __func__, nrf_error);
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}
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static void conn_params_error_handler(uint32_t nrf_error)
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{
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NRF_LOG_INFO("%s: nrf_error=%d", __func__, nrf_error);
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}
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/**@brief Function for the GAP initialization.
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*
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* @details This function will set up all the necessary GAP (Generic Access Profile) parameters of
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* the device. It also sets the permissions and appearance.
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*/
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static void gap_params_init(void)
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{
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uint32_t err_code;
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ble_gap_conn_params_t gap_conn_params;
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ble_gap_conn_sec_mode_t sec_mode;
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BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
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err_code = sd_ble_gap_device_name_set(&sec_mode,(const uint8_t *)DEVICE_NAME, strlen(DEVICE_NAME));
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APP_ERROR_CHECK(err_code);
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memset(&gap_conn_params, 0, sizeof(gap_conn_params));
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gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
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gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
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gap_conn_params.slave_latency = SLAVE_LATENCY;
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gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;
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err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
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APP_ERROR_CHECK(err_code);
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}
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/**@brief Function for handling the data from the Nordic UART Service.
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*
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* @details This function will process the data received from the Nordic UART BLE Service and send
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* it to the UART module.
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*
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* @param[in] p_evt Nordic UART Service event.
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*/
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static void nus_data_handler(ble_nus_evt_t * p_evt)
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{
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if (p_evt->type == BLE_NUS_EVT_RX_DATA)
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{
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NRF_LOG_INFO("Received data from BLE NUS:");
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NRF_LOG_HEXDUMP_INFO(p_evt->params.rx_data.p_data, p_evt->params.rx_data.length);
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}
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}
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/**@brief Function for initializing services that will be used by the application.
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*/
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static void services_init(void)
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{
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char str[32];
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uint32_t err_code;
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ble_nus_init_t nus_init;
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ble_dis_init_t dis_init;
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ble_bas_init_t bas_init;
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nrf_ble_qwr_init_t qwr_init = {0};
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// Initialize Queued Write Module.
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qwr_init.error_handler = nrf_qwr_error_handler;
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err_code = nrf_ble_qwr_init(&m_qwr, &qwr_init);
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APP_ERROR_CHECK(err_code);
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// Initialize NUS.
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memset(&nus_init, 0, sizeof(nus_init));
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nus_init.data_handler = nus_data_handler;
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err_code = ble_nus_init(&m_nus, &nus_init);
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APP_ERROR_CHECK(err_code);
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memset(&dis_init, 0, sizeof(dis_init));
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sprintf(str, "%08X", kernel_version());
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ble_srv_ascii_to_utf8(&dis_init.sw_rev_str, str);
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ble_srv_ascii_to_utf8(&dis_init.model_num_str, "klite");
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ble_srv_ascii_to_utf8(&dis_init.manufact_name_str, "kernev@foxmail.com");
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dis_init.dis_char_rd_sec = SEC_OPEN;
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err_code = ble_dis_init(&dis_init);
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APP_ERROR_CHECK(err_code);
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memset(&bas_init, 0, sizeof(bas_init));
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bas_init.bl_rd_sec = SEC_OPEN;
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bas_init.bl_cccd_wr_sec = SEC_OPEN;
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bas_init.bl_report_rd_sec = SEC_OPEN;
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bas_init.evt_handler = NULL;
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bas_init.support_notification = true;
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bas_init.p_report_ref = NULL;
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bas_init.initial_batt_level = 100;
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err_code = ble_bas_init(&m_bas, &bas_init);
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APP_ERROR_CHECK(err_code);
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}
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/**@brief Function for handling an event from the Connection Parameters Module.
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*
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* @details This function will be called for all events in the Connection Parameters Module
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* which are passed to the application.
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*
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* @note All this function does is to disconnect. This could have been done by simply setting
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* the disconnect_on_fail config parameter, but instead we use the event handler
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* mechanism to demonstrate its use.
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*
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* @param[in] p_evt Event received from the Connection Parameters Module.
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*/
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static void on_conn_params_evt(ble_conn_params_evt_t * p_evt)
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{
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uint32_t err_code;
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if (p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED)
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{
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err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
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APP_ERROR_CHECK(err_code);
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}
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}
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/**@brief Function for initializing the Connection Parameters module.
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*/
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static void conn_params_init(void)
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{
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uint32_t err_code;
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ble_conn_params_init_t cp_init;
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memset(&cp_init, 0, sizeof(cp_init));
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cp_init.p_conn_params = NULL;
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cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
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cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY;
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cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT;
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cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID;
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cp_init.disconnect_on_fail = false;
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cp_init.evt_handler = on_conn_params_evt;
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cp_init.error_handler = conn_params_error_handler;
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err_code = ble_conn_params_init(&cp_init);
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APP_ERROR_CHECK(err_code);
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}
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/**@brief Function for handling advertising events.
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*
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* @details This function will be called for advertising events which are passed to the application.
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*
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* @param[in] ble_adv_evt Advertising event.
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*/
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static void on_adv_evt(ble_adv_evt_t ble_adv_evt)
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{
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switch (ble_adv_evt)
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{
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case BLE_ADV_EVT_FAST:
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break;
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case BLE_ADV_EVT_IDLE:
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break;
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default:
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break;
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}
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}
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/**@brief Function for handling BLE events.
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*
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* @param[in] p_ble_evt Bluetooth stack event.
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* @param[in] p_context Unused.
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*/
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static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
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{
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uint32_t err_code;
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NRF_LOG_INFO("%s: %X", __func__,p_ble_evt->header.evt_id);
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switch (p_ble_evt->header.evt_id)
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{
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case BLE_GAP_EVT_CONNECTED:
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NRF_LOG_INFO("Connected");
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m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
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err_code = nrf_ble_qwr_conn_handle_assign(&m_qwr, m_conn_handle);
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APP_ERROR_CHECK(err_code);
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break;
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case BLE_GAP_EVT_DISCONNECTED:
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NRF_LOG_INFO("Disconnected");
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m_conn_handle = BLE_CONN_HANDLE_INVALID;
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break;
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case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
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{
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NRF_LOG_INFO("PHY update request.");
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ble_gap_phys_t const phys =
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{
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.rx_phys = BLE_GAP_PHY_AUTO,
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.tx_phys = BLE_GAP_PHY_AUTO,
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};
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err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys);
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APP_ERROR_CHECK(err_code);
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} break;
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case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
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// Pairing not supported
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err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
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APP_ERROR_CHECK(err_code);
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break;
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case BLE_GATTS_EVT_SYS_ATTR_MISSING:
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// No system attributes have been stored.
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err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0);
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APP_ERROR_CHECK(err_code);
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break;
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case BLE_GATTC_EVT_TIMEOUT:
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// Disconnect on GATT Client timeout event.
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err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
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APP_ERROR_CHECK(err_code);
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break;
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case BLE_GATTS_EVT_TIMEOUT:
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// Disconnect on GATT Server timeout event.
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err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION);
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APP_ERROR_CHECK(err_code);
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break;
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default:
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// No implementation needed.
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NRF_LOG_INFO("Ignore event");
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break;
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}
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}
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/**@brief Function for the SoftDevice initialization.
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*
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* @details This function initializes the SoftDevice and the BLE event interrupt.
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*/
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static void ble_stack_init(void)
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{
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ret_code_t err_code;
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err_code = nrf_sdh_enable_request();
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APP_ERROR_CHECK(err_code);
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// Configure the BLE stack using the default settings.
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// Fetch the start address of the application RAM.
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uint32_t ram_start = 0;
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err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
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APP_ERROR_CHECK(err_code);
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// Enable BLE stack.
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err_code = nrf_sdh_ble_enable(&ram_start);
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APP_ERROR_CHECK(err_code);
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// Register a handler for BLE events.
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NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
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}
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/**@brief Function for handling events from the GATT library. */
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static void gatt_evt_handler(nrf_ble_gatt_t * p_gatt, nrf_ble_gatt_evt_t const * p_evt)
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{
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if ((m_conn_handle == p_evt->conn_handle) && (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED))
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{
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m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH;
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NRF_LOG_INFO("Data len is set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len);
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}
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NRF_LOG_INFO("ATT MTU exchange completed. central 0x%x peripheral 0x%x", p_gatt->att_mtu_desired_central, p_gatt->att_mtu_desired_periph);
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}
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/**@brief Function for initializing the GATT library. */
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static void gatt_init(void)
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{
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ret_code_t err_code;
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err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler);
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APP_ERROR_CHECK(err_code);
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err_code = nrf_ble_gatt_att_mtu_periph_set(&m_gatt, NRF_SDH_BLE_GATT_MAX_MTU_SIZE);
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APP_ERROR_CHECK(err_code);
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}
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/**@brief Function for initializing the Advertising functionality.
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*/
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static void advertising_init(void)
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{
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uint32_t err_code;
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ble_advertising_init_t init;
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memset(&init, 0, sizeof(init));
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init.advdata.name_type = BLE_ADVDATA_FULL_NAME;
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init.advdata.include_appearance = false;
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init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
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init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]);
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init.srdata.uuids_complete.p_uuids = m_adv_uuids;
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init.config.ble_adv_fast_enabled = true;
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init.config.ble_adv_fast_interval = 512; /* x0.625ms = 320ms */
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init.config.ble_adv_fast_timeout = 0;
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init.evt_handler = on_adv_evt;
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err_code = ble_advertising_init(&m_advertising, &init);
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APP_ERROR_CHECK(err_code);
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ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);
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}
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/**@brief Function for initializing the nrf log module.
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*/
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static void app_log_init(void)
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{
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NRF_LOG_INIT(NULL);
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NRF_LOG_DEFAULT_BACKENDS_INIT();
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}
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/**@brief Function for starting advertising. */
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static void advertising_start(void)
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{
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ret_code_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
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APP_ERROR_CHECK(err_code);
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}
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static void bas_update_timer(void *arg)
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{
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static uint8_t level;
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level = (level + 1) % 100;
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NRF_LOG_INFO("Update battery level: %d", level);
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ble_bas_battery_level_update(&m_bas, level, BLE_CONN_HANDLE_ALL);
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}
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static void bas_update_init(void)
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{
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APP_TIMER_DEF(bas_timer);
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app_timer_create(&bas_timer, APP_TIMER_MODE_REPEATED, bas_update_timer);
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app_timer_start(bas_timer, 3000, NULL);
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}
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void app_init(void)
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{
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app_log_init();
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app_timer_init();
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ble_stack_init();
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gap_params_init();
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gatt_init();
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services_init();
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advertising_init();
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conn_params_init();
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advertising_start();
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nrf_sdh_rtos_init();
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NRF_LOG_INFO("Debug logging for UART over RTT started.");
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bas_update_init();
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}
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