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/* Copyright (c) 2014 Nordic Semiconductor. All Rights Reserved.
 *
 * The information contained herein is property of Nordic Semiconductor ASA.
 * Terms and conditions of usage are described in detail in NORDIC
 * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
 *
 * Licensees are granted free, non-transferable use of the information. NO
 * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
 * the file.
 *
 */
/** @example examples/ble_peripheral/ble_app_hrs/main.c
 *
 * @brief Heart Rate Service Sample Application main file.
 *
 * This file contains the source code for a sample application using the Heart Rate service
 * (and also Battery and Device Information services). This application uses the
 * @ref srvlib_conn_params module.
 */

#include <stdint.h>
#include <string.h>
#include "nordic_common.h"
#include "nrf.h"
#include "nrf_delay.h"
#include "nrf51_bitfields.h"
#include "ble.h"
#include "ble_hci.h"
#include "ble_srv_common.h"
#include "ble_advdata.h"
#include "ble_gatt.h"
#include "ble_bas.h"
#include "ble_hrs.h"
#include "ble_dis.h"
#ifdef BLE_DFU_APP_SUPPORT
#include "ble_dfu.h"
#include "dfu_app_handler.h"
#endif // BLE_DFU_APP_SUPPORT
#include "ble_conn_params.h"
#include "boards.h"
#include "ble_sensorsim.h"
#include "softdevice_handler.h"
#include "device_manager.h"
#include "pstorage.h"
#include "app_error.h"
#include "app_trace.h"
#include "app_timer.h"
#include "app_gpiote.h"
#include "bsp.h"

#include "phone_remote.h"
#include "LiquidCrystal.h"

#include <inttypes.h>

#define dbg printf

#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*/

// BOARD_PCA10031 doesn't have any buttons according to the BSP
#ifndef BOARD_PCA10031
#define WAKEUP_BUTTON_ID                     0                                          /**< Button used to wake up the application. */
#define BOND_DELETE_ALL_BUTTON_ID            1                                          /**< Button used for deleting all bonded centrals during startup. */
#endif

#define DEVICE_NAME                          "Woot-51"
#define MANUFACTURER_NAME                    "NordicSemiconductor"
#define APP_ADV_INTERVAL                     40                                         /**< The advertising interval (in units of 0.625 ms. This value corresponds to 25 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                 (6+BSP_APP_TIMERS_NUMBER)                  /**< Maximum number of simultaneously created timers. */
#define APP_TIMER_OP_QUEUE_SIZE              4                                          /**< Size of timer operation queues. */

#define SENSOR_CONTACT_DETECTED_INTERVAL     APP_TIMER_TICKS(5000, APP_TIMER_PRESCALER) /**< Sensor Contact Detected toggle interval (ticks). */

#define MIN_CONN_INTERVAL                    MSEC_TO_UNITS(500, UNIT_1_25_MS)           /**< Minimum acceptable connection interval (0.5 seconds). */
#define MAX_CONN_INTERVAL                    MSEC_TO_UNITS(1000, 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(5000, APP_TIMER_PRESCALER) /**< Time from initiating event (connect or start of notification) to first time sd_ble_gap_conn_param_update is called (5 seconds). */
#define NEXT_CONN_PARAMS_UPDATE_DELAY        APP_TIMER_TICKS(30000, APP_TIMER_PRESCALER)/**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */
#define MAX_CONN_PARAMS_UPDATE_COUNT         3                                          /**< Number of attempts before giving up the connection parameter negotiation. */

#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 uint16_t                              m_conn_handle = BLE_CONN_HANDLE_INVALID;   /**< Handle of the current connection. */
static ble_gap_adv_params_t                  m_adv_params;                              /**< Parameters to be passed to the stack when starting advertising. */

static dm_application_instance_t             m_app_handle;                              /**< Application identifier allocated by device manager */

static bool                                  m_memory_access_in_progress = false;       /**< Flag to keep track of ongoing operations on persistent memory. */


static app_timer_id_t hello_timer;

void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name)
{
    app_error_handler(DEAD_BEEF, line_num, p_file_name);
}

static uint32_t seconds = 0;

static void hello_timer_handler(void* data)
{
	uint32_t ticks;
	app_timer_cnt_get(&ticks);

	uint32_t ms = (1000 * (1 + APP_TIMER_PRESCALER) * ticks) / APP_TIMER_CLOCK_FREQ;

	seconds++;
	printf("hello world, seconds=%" PRIu32 ",  ticks=%" PRIu32 ", ms=%" PRIu32 "\r\n", seconds, ticks, ms);

//    liquid_crystal_clear();

//    char buf0[8];
//
    liquid_crystal_set_cursor(0, 1);
    uint32_t value = 1337;
    app_timer_cnt_get(&value);
    char buf1[9];
//    snprintf(buf1, sizeof(buf1), "%" PRIu32, value);
    int size = snprintf(buf1, sizeof(buf1), "%" PRIu32, seconds);
//    liquid_crystal_write_string("hello!");
    liquid_crystal_write_string_len(buf1, size);
//    liquid_crystal_write_string(buf1);
    buf1[8] = '\0';
    printf("buf: %s\r\n", buf1);
}

static void timers_init(void)
{
    uint32_t err_code;

    // Initialize timer module.
    APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, false);

    err_code = app_timer_create(&hello_timer, APP_TIMER_MODE_REPEATED, hello_timer_handler);
    APP_ERROR_CHECK(err_code);
}

static void timers_start() {
    uint32_t err_code;

    uint32_t ticks = APP_TIMER_TICKS(1000, APP_TIMER_PRESCALER);
    err_code = app_timer_start(hello_timer, ticks, NULL);
    APP_ERROR_CHECK(err_code);
}

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);

    err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_HEART_RATE_SENSOR_HEART_RATE_BELT);
    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);
}


static void advertising_init(void)
{
    uint32_t      err_code;
    ble_advdata_t advdata;
    uint8_t       flags = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;

    ble_uuid_t adv_uuids[] = {};

    // Build and set advertising data.
    memset(&advdata, 0, sizeof(advdata));

    advdata.name_type               = BLE_ADVDATA_FULL_NAME;
    advdata.include_appearance      = true;
    advdata.flags.size              = sizeof(flags);
    advdata.flags.p_data            = &flags;
    advdata.uuids_complete.uuid_cnt = sizeof(adv_uuids) / sizeof(adv_uuids[0]);
    advdata.uuids_complete.p_uuids  = adv_uuids;

    err_code = ble_advdata_set(&advdata, NULL);
    APP_ERROR_CHECK(err_code);

    // Initialize advertising parameters (used when starting advertising).
    memset(&m_adv_params, 0, sizeof(m_adv_params));

    m_adv_params.type        = BLE_GAP_ADV_TYPE_ADV_IND;
    m_adv_params.p_peer_addr = NULL;                           // Undirected advertisement.
    m_adv_params.fp          = BLE_GAP_ADV_FP_ANY;
    m_adv_params.interval    = APP_ADV_INTERVAL;
    m_adv_params.timeout     = APP_ADV_TIMEOUT_IN_SECONDS;
}

/**@brief Function for initializing services that will be used by the application.
 *
 * @details Initialize the Heart Rate, Battery and Device Information services.
 */
static void services_init(void)
{
    uint32_t       err_code = NRF_SUCCESS;

//    err_code = sm_add_services();
    APP_ERROR_CHECK(err_code);
}

static void advertising_start(void)
{
    uint32_t err_code;
    uint32_t count;

    // Verify if there is any flash access pending, if yes delay starting advertising until
    // it's complete.
    err_code = pstorage_access_status_get(&count);
    APP_ERROR_CHECK(err_code);

    if (count != 0)
    {
        m_memory_access_in_progress = true;
        return;
    }

    err_code = sd_ble_gap_adv_start(&m_adv_params);
    APP_ERROR_CHECK(err_code);

    err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
    APP_ERROR_CHECK(err_code);
}

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);
    }
}

static void conn_params_error_handler(uint32_t nrf_error)
{
    APP_ERROR_HANDLER(nrf_error);
}

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.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);
}

static void on_ble_evt(ble_evt_t * p_ble_evt)
{
    uint32_t err_code;

    switch (p_ble_evt->header.evt_id)
    {
        case BLE_GAP_EVT_CONNECTED:

            err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
            APP_ERROR_CHECK(err_code);
            m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
            break;

        case BLE_GAP_EVT_DISCONNECTED:
            err_code = bsp_indication_set(BSP_INDICATE_IDLE);
            APP_ERROR_CHECK(err_code);
            advertising_start();
            break;

        case BLE_GAP_EVT_TIMEOUT:

            if (p_ble_evt->evt.gap_evt.params.timeout.src == BLE_GAP_TIMEOUT_SRC_ADVERTISEMENT)
            {
            	printf("re-starting advertisement\n");
            	advertising_start();
            	/*
                err_code = bsp_indication_set(BSP_INDICATE_IDLE);
                APP_ERROR_CHECK(err_code);

                // 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;
    }
}

static void ble_evt_dispatch(ble_evt_t * p_ble_evt)
{
//    sm_on_ble_evt(p_ble_evt);

    dm_ble_evt_handler(p_ble_evt);
    on_ble_evt(p_ble_evt);
}

static void sys_evt_dispatch(uint32_t sys_evt)
{
    pstorage_sys_event_handler(sys_evt);
}

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);

    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);

    err_code = softdevice_ble_evt_handler_set(ble_evt_dispatch);
    APP_ERROR_CHECK(err_code);

    err_code = softdevice_sys_evt_handler_set(sys_evt_dispatch);
    APP_ERROR_CHECK(err_code);
}

static uint32_t device_manager_evt_handler(dm_handle_t const * p_handle,
                                           dm_event_t const  * p_event,
                                           api_result_t        event_result)
{
    APP_ERROR_CHECK(event_result);

    switch(p_event->event_id)
    {
    }

    return NRF_SUCCESS;
}

static void device_manager_init(void)
{
    uint32_t               err_code;
    dm_init_param_t        init_data;
    dm_application_param_t register_param;

    // Initialize persistent storage module.
    err_code = pstorage_init();
    APP_ERROR_CHECK(err_code);

    init_data.clear_persistent_data = false; // was true

    err_code = dm_init(&init_data);
    APP_ERROR_CHECK(err_code);

    memset(&register_param.sec_param, 0, sizeof(ble_gap_sec_params_t));

    register_param.sec_param.timeout      = SEC_PARAM_TIMEOUT;
    register_param.sec_param.bond         = SEC_PARAM_BOND;
    register_param.sec_param.mitm         = SEC_PARAM_MITM;
    register_param.sec_param.io_caps      = SEC_PARAM_IO_CAPABILITIES;
    register_param.sec_param.oob          = SEC_PARAM_OOB;
    register_param.sec_param.min_key_size = SEC_PARAM_MIN_KEY_SIZE;
    register_param.sec_param.max_key_size = SEC_PARAM_MAX_KEY_SIZE;
    register_param.evt_handler            = device_manager_evt_handler;
    register_param.service_type           = DM_PROTOCOL_CNTXT_GATT_SRVR_ID;

    err_code = dm_register(&m_app_handle, &register_param);
    APP_ERROR_CHECK(err_code);
}

static void power_manage(void)
{
    uint32_t err_code = sd_app_evt_wait();
    APP_ERROR_CHECK(err_code);
}

int main(void)
{
    app_trace_init();

    dbg("Phone remote starting...\r\n");

    ble_stack_init();
    timers_init();

    APP_GPIOTE_INIT(2);

    uint32_t err_code = bsp_init(BSP_INIT_LED | BSP_INIT_BUTTONS, APP_TIMER_TICKS(100, APP_TIMER_PRESCALER), NULL);
    APP_ERROR_CHECK(err_code);

    liquid_crystal_init(false, true, false);
    liquid_crystal_reset();

    /*
    liquid_crystal_display(true, false, false);
    liquid_crystal_write_string("01234567890123456");
    */
/*
    char chars[] = "abcdefghijklmopqrstuvwxyz";

    for(int i = 0; i < 10; i++) {
        nrf_delay_ms(200);
        liquid_crystal_write_char(chars[i]);
    }

    nrf_delay_ms(1000);
    liquid_crystal_clear();
*/

    liquid_crystal_display(true, false, false);
    nrf_delay_ms(500);

    liquid_crystal_display(false, false, false);
    nrf_delay_ms(500);

    liquid_crystal_display(true, false, false);
    nrf_delay_ms(500);

    liquid_crystal_display(false, false, false);
    nrf_delay_ms(500);

    liquid_crystal_display(true, true, true);
    nrf_delay_ms(500);
//    liquid_crystal_return_home();

    liquid_crystal_set_cursor(1, 1);
    liquid_crystal_write_string("hello!");

    /*
    device_manager_init();
    gap_params_init();
    advertising_init();
    services_init();
    conn_params_init();

    advertising_start();
    */

    timers_start();

    for (;; )
    {
        power_manage();
    }
}