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/* Copyright (c) 2013 Nordic Semiconductor. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the license.txt file.
*/
/**
* This file is the main file for the application described in application note
* nAN-36 Creating Bluetooth® Low Energy Applications Using nRF51822.
*/
#include <stdint.h>
#include <string.h>
#include "nordic_common.h"
#include "nrf.h"
#include "app_error.h"
#include "nrf_gpio.h"
#include "nrf51_bitfields.h"
#include "ble.h"
#include "ble_hci.h"
#include "ble_srv_common.h"
#include "ble_advdata.h"
#include "ble_conn_params.h"
#include "boards.h"
#include "app_scheduler.h"
#include "softdevice_handler.h"
#include "app_timer_appsh.h"
#include "ble_error_log.h"
#include "app_gpiote.h"
#include "app_button.h"
#include "ble_debug_assert_handler.h"
#include "pstorage.h"
#include "ble_lbs.h"
#include "bsp.h"
#include "ble_gap.h"
#define IS_SRVC_CHANGED_CHARACT_PRESENT 0 /**< Include or not the service_changed characteristic. if not enabled, the server's database cannot be changed for the lifetime of the device*/
#define WAKEUP_BUTTON_PIN BSP_BUTTON_0 /**< Button used to wake up the application. */
#define ADVERTISING_LED_PIN_NO BSP_LED_0 /**< Is on when device is advertising. */
#define CONNECTED_LED_PIN_NO BSP_LED_1 /**< Is on when device has connected. */
#define LEDBUTTON_LED_PIN_NO BSP_LED_0
#define LEDBUTTON_BUTTON_PIN_NO BSP_BUTTON_1
#define DEVICE_NAME "LedButtonDemo" /**< Name of device. Will be included in the advertising data. */
#define APP_ADV_INTERVAL 64 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */
#define APP_ADV_TIMEOUT_IN_SECONDS 180 /**< The advertising timeout (in units of seconds). */
#define APP_TIMER_PRESCALER 0 /**< Value of the RTC1 PRESCALER register. */
#define APP_TIMER_MAX_TIMERS 2 /**< Maximum number of simultaneously created timers. */
#define APP_TIMER_OP_QUEUE_SIZE 4 /**< Size of timer operation queues. */
#define MIN_CONN_INTERVAL MSEC_TO_UNITS(100, UNIT_1_25_MS) /**< Minimum acceptable connection interval (0.5 seconds). */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(200, UNIT_1_25_MS) /**< Maximum acceptable connection interval (1 second). */
#define SLAVE_LATENCY 0 /**< Slave latency. */
#define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds). */
#define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(20000, APP_TIMER_PRESCALER) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (15 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000, APP_TIMER_PRESCALER) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (5 seconds). */
#define MAX_CONN_PARAMS_UPDATE_COUNT 3 /**< Number of attempts before giving up the connection parameter negotiation. */
#define APP_GPIOTE_MAX_USERS 1 /**< Maximum number of users of the GPIOTE handler. */
#define BUTTON_DETECTION_DELAY APP_TIMER_TICKS(50, APP_TIMER_PRESCALER) /**< Delay from a GPIOTE event until a button is reported as pushed (in number of timer ticks). */
#define SEC_PARAM_TIMEOUT 30 /**< Timeout for Pairing Request or Security Request (in seconds). */
#define SEC_PARAM_BOND 1 /**< Perform bonding. */
#define SEC_PARAM_MITM 0 /**< Man In The Middle protection not required. */
#define SEC_PARAM_IO_CAPABILITIES BLE_GAP_IO_CAPS_NONE /**< No I/O capabilities. */
#define SEC_PARAM_OOB 0 /**< Out Of Band data not available. */
#define SEC_PARAM_MIN_KEY_SIZE 7 /**< Minimum encryption key size. */
#define SEC_PARAM_MAX_KEY_SIZE 16 /**< Maximum encryption key size. */
#define DEAD_BEEF 0xDEADBEEF /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */
static ble_gap_sec_params_t m_sec_params; /**< Security requirements for this application. */
static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID; /**< Handle of the current connection. */
static ble_lbs_t m_lbs;
#define SCHED_MAX_EVENT_DATA_SIZE sizeof(app_timer_event_t) /**< Maximum size of scheduler events. Note that scheduler BLE stack events do not contain any data, as the events are being pulled from the stack in the event handler. */
#define SCHED_QUEUE_SIZE 10 /**< Maximum number of events in the scheduler queue. */
// Persistent storage system event handler
void pstorage_sys_event_handler (uint32_t p_evt);
/**@brief Function for error handling, which is called when an error has occurred.
*
* @warning This handler is an example only and does not fit a final product. You need to analyze
* how your product is supposed to react in case of error.
*
* @param[in] error_code Error code supplied to the handler.
* @param[in] line_num Line number where the handler is called.
* @param[in] p_file_name Pointer to the file name.
*/
void app_error_handler(uint32_t error_code, uint32_t line_num, const uint8_t * p_file_name)
{
// This call can be used for debug purposes during application development.
// @note CAUTION: Activating this code will write the stack to flash on an error.
// This function should NOT be used in a final product.
// It is intended STRICTLY for development/debugging purposes.
// The flash write will happen EVEN if the radio is active, thus interrupting
// any communication.
// Use with care. Un-comment the line below to use.
ble_debug_assert_handler(error_code, line_num, p_file_name);
// On assert, the system can only recover with a reset.
//NVIC_SystemReset();
}
/**@brief Callback function for asserts in the SoftDevice.
*
* @details This function will be called in case of an assert in the SoftDevice.
*
* @warning This handler is an example only and does not fit a final product. You need to analyze
* how your product is supposed to react in case of Assert.
* @warning On assert from the SoftDevice, the system can only recover on reset.
*
* @param[in] line_num Line number of the failing ASSERT call.
* @param[in] file_name File name of the failing ASSERT call.
*/
void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
{
app_error_handler(DEAD_BEEF, line_num, p_file_name);
}
/**@brief Function for the LEDs initialization.
*
* @details Initializes all LEDs used by the application.
*/
static void leds_init(void)
{
nrf_gpio_cfg_output(ADVERTISING_LED_PIN_NO);
nrf_gpio_cfg_output(CONNECTED_LED_PIN_NO);
nrf_gpio_cfg_output(LEDBUTTON_LED_PIN_NO);
}
/**@brief Function for the Timer initialization.
*
* @details Initializes the timer module.
*/
static void timers_init(void)
{
// Initialize timer module, making it use the scheduler
APP_TIMER_APPSH_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, true);
}
/**@brief Function for the GAP initialization.
*
* @details This function sets up all the necessary GAP (Generic Access Profile) parameters of the
* device including the device name, appearance, and the preferred connection parameters.
*/
static void gap_params_init(void)
{
uint32_t err_code;
ble_gap_conn_params_t gap_conn_params;
ble_gap_conn_sec_mode_t sec_mode;
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);
err_code = sd_ble_gap_device_name_set(&sec_mode,
(const uint8_t *)DEVICE_NAME,
strlen(DEVICE_NAME));
APP_ERROR_CHECK(err_code);
memset(&gap_conn_params, 0, sizeof(gap_conn_params));
gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
gap_conn_params.slave_latency = SLAVE_LATENCY;
gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;
err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for initializing the Advertising functionality.
*
* @details Encodes the required advertising data and passes it to the stack.
* Also builds a structure to be passed to the stack when starting advertising.
*/
static void advertising_init(void)
{
uint32_t err_code;
ble_advdata_t advdata;
ble_advdata_t scanrsp;
ble_uuid_t adv_uuids[] = {{LBS_UUID_SERVICE, m_lbs.uuid_type}};
// Build and set advertising data
memset(&advdata, 0, sizeof(advdata));
advdata.name_type = BLE_ADVDATA_FULL_NAME;
advdata.include_appearance = true;
advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE;
memset(&scanrsp, 0, sizeof(scanrsp));
scanrsp.uuids_complete.uuid_cnt = sizeof(adv_uuids) / sizeof(adv_uuids[0]);
scanrsp.uuids_complete.p_uuids = adv_uuids;
err_code = ble_advdata_set(&advdata, &scanrsp);
APP_ERROR_CHECK(err_code);
}
static void led_write_handler(ble_lbs_t * p_lbs, uint8_t led_state)
{
if (led_state)
{
nrf_gpio_pin_set(LEDBUTTON_LED_PIN_NO);
}
else
{
nrf_gpio_pin_clear(LEDBUTTON_LED_PIN_NO);
}
}
/**@brief Function for initializing services that will be used by the application.
*/
static void services_init(void)
{
uint32_t err_code;
ble_lbs_init_t init;
init.led_write_handler = led_write_handler;
err_code = ble_lbs_init(&m_lbs, &init);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for initializing security parameters.
*/
static void sec_params_init(void)
{
m_sec_params.bond = SEC_PARAM_BOND;
m_sec_params.mitm = SEC_PARAM_MITM;
m_sec_params.io_caps = SEC_PARAM_IO_CAPABILITIES;
m_sec_params.oob = SEC_PARAM_OOB;
m_sec_params.min_key_size = SEC_PARAM_MIN_KEY_SIZE;
m_sec_params.max_key_size = SEC_PARAM_MAX_KEY_SIZE;
}
/**@brief Function for handling the Connection Parameters Module.
*
* @details This function will be called for all events in the Connection Parameters Module which
* are passed to the application.
* @note All this function does is to disconnect. This could have been done by simply
* setting the disconnect_on_fail config parameter, but instead we use the event
* handler mechanism to demonstrate its use.
*
* @param[in] p_evt Event received from the Connection Parameters Module.
*/
static void on_conn_params_evt(ble_conn_params_evt_t * p_evt)
{
uint32_t err_code;
if(p_evt->evt_type == BLE_CONN_PARAMS_EVT_FAILED)
{
err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_CONN_INTERVAL_UNACCEPTABLE);
APP_ERROR_CHECK(err_code);
}
}
/**@brief Function for handling a Connection Parameters error.
*
* @param[in] nrf_error Error code containing information about what went wrong.
*/
static void conn_params_error_handler(uint32_t nrf_error)
{
APP_ERROR_HANDLER(nrf_error);
}
/**@brief Function for initializing the Connection Parameters module.
*/
static void conn_params_init(void)
{
uint32_t err_code;
ble_conn_params_init_t cp_init;
memset(&cp_init, 0, sizeof(cp_init));
cp_init.p_conn_params = NULL;
cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY;
cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY;
cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT;
cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID;
cp_init.disconnect_on_fail = false;
cp_init.evt_handler = on_conn_params_evt;
cp_init.error_handler = conn_params_error_handler;
err_code = ble_conn_params_init(&cp_init);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for starting timers.
*/
static void timers_start(void)
{
}
/**@brief Function for starting advertising.
*/
static void advertising_start(void)
{
uint32_t err_code;
ble_gap_adv_params_t adv_params;
// Start advertising
memset(&adv_params, 0, sizeof(adv_params));
adv_params.type = BLE_GAP_ADV_TYPE_ADV_IND;
adv_params.p_peer_addr = NULL;
adv_params.fp = BLE_GAP_ADV_FP_ANY;
adv_params.interval = APP_ADV_INTERVAL;
adv_params.timeout = APP_ADV_TIMEOUT_IN_SECONDS;
err_code = sd_ble_gap_adv_start(&adv_params);
APP_ERROR_CHECK(err_code);
nrf_gpio_pin_set(ADVERTISING_LED_PIN_NO);
}
/**@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;
static ble_gap_evt_auth_status_t m_auth_status;
static ble_gap_master_id_t p_master_id;
static ble_gap_sec_keyset_t keys_exchanged;
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_CONNECTED:
nrf_gpio_pin_set(CONNECTED_LED_PIN_NO);
nrf_gpio_pin_clear(ADVERTISING_LED_PIN_NO);
m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
err_code = app_button_enable();
APP_ERROR_CHECK(err_code);
break;
case BLE_GAP_EVT_DISCONNECTED:
nrf_gpio_pin_clear(CONNECTED_LED_PIN_NO);
m_conn_handle = BLE_CONN_HANDLE_INVALID;
err_code = app_button_disable();
APP_ERROR_CHECK(err_code);
advertising_start();
break;
case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
err_code = sd_ble_gap_sec_params_reply(m_conn_handle,
BLE_GAP_SEC_STATUS_SUCCESS,
&m_sec_params,&keys_exchanged);
APP_ERROR_CHECK(err_code);
break;
case BLE_GATTS_EVT_SYS_ATTR_MISSING:
err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0,BLE_GATTS_SYS_ATTR_FLAG_USR_SRVCS);
APP_ERROR_CHECK(err_code);
break;
case BLE_GAP_EVT_AUTH_STATUS:
m_auth_status = p_ble_evt->evt.gap_evt.params.auth_status;
break;
case BLE_GAP_EVT_SEC_INFO_REQUEST:
//p_enc_info = keys_exchanged.keys_central.p_enc_key
if (p_master_id.ediv == p_ble_evt->evt.gap_evt.params.sec_info_request.master_id.ediv)
{
err_code = sd_ble_gap_sec_info_reply(m_conn_handle, &keys_exchanged.keys_central.p_enc_key->enc_info, &keys_exchanged.keys_central.p_id_key->id_info, NULL);
APP_ERROR_CHECK(err_code);
p_master_id.ediv = p_ble_evt->evt.gap_evt.params.sec_info_request.master_id.ediv;
}
else
{
// No keys found for this device
err_code = sd_ble_gap_sec_info_reply(m_conn_handle, NULL, NULL,NULL);
APP_ERROR_CHECK(err_code);
}
break;
case BLE_GAP_EVT_TIMEOUT:
if (p_ble_evt->evt.gap_evt.params.timeout.src == BLE_GAP_TIMEOUT_SRC_ADVERTISING)
{
nrf_gpio_pin_clear(ADVERTISING_LED_PIN_NO);
// Configure buttons with sense level low as wakeup source.
nrf_gpio_cfg_sense_input(WAKEUP_BUTTON_PIN,
BUTTON_PULL,
NRF_GPIO_PIN_SENSE_LOW);
// Go to system-off mode (this function will not return; wakeup will cause a reset)
err_code = sd_power_system_off();
APP_ERROR_CHECK(err_code);
}
break;
default:
// No implementation needed.
break;
}
}
/**@brief Function for dispatching a BLE stack event to all modules with a BLE stack event handler.
*
* @details This function is called from the scheduler in the main loop after a BLE stack
* event has been received.
*
* @param[in] p_ble_evt Bluetooth stack event.
*/
static void ble_evt_dispatch(ble_evt_t * p_ble_evt)
{
on_ble_evt(p_ble_evt);
ble_conn_params_on_ble_evt(p_ble_evt);
ble_lbs_on_ble_evt(&m_lbs, p_ble_evt);
}
/**@brief Function for dispatching a system event to interested modules.
*
* @details This function is called from the System event interrupt handler after a system
* event has been received.
*
* @param[in] sys_evt System stack event.
*/
static void sys_evt_dispatch(uint32_t sys_evt)
{
pstorage_sys_event_handler(sys_evt);
}
/**@brief Function for initializing the BLE stack.
*
* @details Initializes the SoftDevice and the BLE event interrupt.
*/
static void ble_stack_init(void)
{
uint32_t err_code;
// Initialize the SoftDevice handler module.
SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, false);
// Enable BLE stack
ble_enable_params_t ble_enable_params;
memset(&ble_enable_params, 0, sizeof(ble_enable_params));
ble_enable_params.gatts_enable_params.service_changed = IS_SRVC_CHANGED_CHARACT_PRESENT;
err_code = sd_ble_enable(&ble_enable_params);
APP_ERROR_CHECK(err_code);
ble_gap_addr_t addr;
err_code = sd_ble_gap_address_get(&addr);
APP_ERROR_CHECK(err_code);
sd_ble_gap_address_set(BLE_GAP_ADDR_CYCLE_MODE_NONE, &addr);
APP_ERROR_CHECK(err_code);
// Subscribe for BLE events.
err_code = softdevice_ble_evt_handler_set(ble_evt_dispatch);
APP_ERROR_CHECK(err_code);
// Register with the SoftDevice handler module for BLE events.
err_code = softdevice_sys_evt_handler_set(sys_evt_dispatch);
APP_ERROR_CHECK(err_code);
}
/**@brief Function for the Event Scheduler initialization.
*/
static void scheduler_init(void)
{
APP_SCHED_INIT(SCHED_MAX_EVENT_DATA_SIZE, SCHED_QUEUE_SIZE);
}
static void button_event_handler(uint8_t pin_no, uint8_t button_action)
{
uint32_t err_code;
switch (pin_no)
{
case LEDBUTTON_BUTTON_PIN_NO:
err_code = ble_lbs_on_button_change(&m_lbs, button_action);
if (err_code != NRF_SUCCESS &&
err_code != BLE_ERROR_INVALID_CONN_HANDLE &&
err_code != NRF_ERROR_INVALID_STATE)
{
APP_ERROR_CHECK(err_code);
}
break;
default:
APP_ERROR_HANDLER(pin_no);
break;
}
}
/**@brief Function for initializing the GPIOTE handler module.
*/
static void gpiote_init(void)
{
APP_GPIOTE_INIT(APP_GPIOTE_MAX_USERS);
}
/**@brief Function for initializing the button handler module.
*/
static void buttons_init(void)
{
// Note: Array must be static because a pointer to it will be saved in the Button handler
// module.
static app_button_cfg_t buttons[] =
{
{WAKEUP_BUTTON_PIN, false, BUTTON_PULL, NULL},
{LEDBUTTON_BUTTON_PIN_NO, false, BUTTON_PULL, button_event_handler}
};
app_button_init(buttons, sizeof(buttons) / sizeof(buttons[0]), BUTTON_DETECTION_DELAY);
}
/**@brief Function for the Power manager.
*/
static void power_manage(void)
{
uint32_t err_code = sd_app_evt_wait();
APP_ERROR_CHECK(err_code);
}
/**@brief Function for application main entry.
*/
int main(void)
{
// Initialize
leds_init();
timers_init();
gpiote_init();
buttons_init();
ble_stack_init();
scheduler_init();
gap_params_init();
services_init();
advertising_init();
conn_params_init();
sec_params_init();
// Start execution
timers_start();
advertising_start();
// Enter main loop
for (;;)
{
app_sched_execute();
power_manage();
}
}
/**
* @}
*/