main.c

/**
 * Copyright (c) 2014 - 2018, Nordic Semiconductor ASA
 * 
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
 *    conditions and the following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 * 
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 * 
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
 * 
 * 5. Any software provided in binary form under this license must not be reverse
 *    engineered, decompiled, modified and/or disassembled.
 * 
 * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 */
/** @file
 *
 * @defgroup ble_sdk_app_template_main main.c
 * @{
 * @ingroup ble_sdk_app_template
 * @brief Template project main file.
 *
 * This file contains a template for creating a new application. It has the code necessary to wakeup
 * from button, advertise, get a connection restart advertising on disconnect and if no new
 * connection created go back to system-off mode.
 * It can easily be used as a starting point for creating a new application, the comments identified
 * with 'YOUR_JOB' indicates where and how you can customize.
 */

#include <stdbool.h>
#include <stdint.h>
#include "ble_advdata.h"
#include "nordic_common.h"
#include "nrf_sdh.h"
#include "nrf_sdh_soc.h"
#include "nrf_sdh_ble.h"
#include "bsp.h"
#include "app_timer.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "ble_advertising.h"
#include "app_uart.h"
#include "app_util_platform.h"

#if defined (UART_PRESENT)
#include "nrf_uart.h"
#endif
#if defined (UARTE_PRESENT)
#include "nrf_uarte.h"
#endif

#include <stdlib.h>

#include "nrf_delay.h"

#define CENTRAL_LINK_COUNT              0                                 /**< Number of central links used by the application. When changing this number remember to adjust the RAM settings*/
#define PERIPHERAL_LINK_COUNT           0                                 /**< Number of peripheral links used by the application. When changing this number remember to adjust the RAM settings*/

#define BLE_GAP_ADV_SET_DATA_SIZE_MAX		255

#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 APP_CFG_NON_CONN_ADV_TIMEOUT    0                                 /**< Time for which the device must be advertising in non-connectable mode (in seconds). 0 disables timeout. */
//#define NON_CONNECTABLE_ADV_INTERVAL    MSEC_TO_UNITS(2000, UNIT_0_625_MS) /**< The advertising interval for non-connectable advertisement (100 ms). This value can vary between 100ms to 10.24s). */
//#define BEACON_INTERVAL      		APP_TIMER_TICKS(2000)

#define DEAD_BEEF                       0xDEADBEEF                        /**< Value used as error code on stack dump, can be used to identify stack location on stack unwind. */

#define APP_BLE_CONN_CFG_TAG            1                                 /**< A tag identifying the SoftDevice BLE configuration. */

#define APP_COMPANY_IDENTIFIER					0xABBA

#define APP_TIMER_PRESCALER             0                                 /**< Value of the RTC1 PRESCALER register. */
#define APP_TIMER_OP_QUEUE_SIZE         4                                 /**< Size of timer operation queues. */

#define APP_ADV_INTERVAL                300                               /**< The advertising interval (in units of 0.625 ms. This value corresponds to 187.5 ms). */
#define APP_ADV_TIMEOUT_IN_SECONDS      18000  

#define UART_TX_BUF_SIZE                256                                         /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE                256                                         /**< UART RX buffer size. */

#define DEVICE_NAME "GPSDATA"

BLE_ADVERTISING_DEF(m_advertising);

/******************** START OF CONST ADV DATA INIT *************************/
	
    const uint8_t flags = BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED;

    uint8_t data[]  = "Hello";

    // Variable to hold manufacturer specific data
    // Initialize with easily identifiable data
    ble_advdata_manuf_data_t manuf_data = 
    {
            .company_identifier       = 0xFFFF,
            .data.p_data              = data,
            .data.size                = sizeof(data)
    }; 

    ble_advertising_init_t init_adv_data = 
    {
				.advdata.name_type               = BLE_ADVDATA_FULL_NAME,
				.advdata.include_appearance      = false,
				.advdata.flags                   = flags, //BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
				.advdata.p_manuf_specific_data   = &manuf_data
    };

/***********************END OF CONSTANT ADV DATA INIT **************************/


static void advertising_data_update(uint8_t * adv_manuf_arr);

/**@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 Timer initialization.
 *
 * @details Initializes the timer module. This creates and starts application timers.
 */
static void timers_init(void)
{
    ret_code_t err_code;

    // Initialize timer module.
    err_code = app_timer_init();
    APP_ERROR_CHECK(err_code);
}



static void advertising_data_update(uint8_t * adv_manuf_arr)
{
    ret_code_t err_code;

    ble_advdata_manuf_data_t 	adv_manuf_data;
    uint8_array_t            	adv_manuf_data_array;
	
    ble_advertising_init_t init = init_adv_data;

    memset(&init, 0, sizeof(init));

    init.advdata.name_type          = BLE_ADVDATA_FULL_NAME;
    init.advdata.include_appearance = false;
    init.advdata.flags              = flags; //BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;

    adv_manuf_data_array.p_data     = adv_manuf_arr;
    adv_manuf_data_array.size 	    = sizeof(adv_manuf_arr);

    adv_manuf_data.company_identifier 	= APP_COMPANY_IDENTIFIER;
    adv_manuf_data.data                 = adv_manuf_data_array;
    init.advdata.p_manuf_specific_data 	= &adv_manuf_data;
                                            
    err_code = ble_advdata_set(&init.advdata, NULL);
    APP_ERROR_CHECK(err_code);	   
}
/**@brief   Function for handling app_uart events.
 *
 * @details This function will receive a single character from the app_uart module and append it to
 *          a string. The string will be be sent over BLE when the last character received was a
 *          'new line' '\n' (hex 0x0A) or if the string has reached the maximum data length.
 */
/**@snippet [Handling the data received over UART] */
void uart_event_handle(app_uart_evt_t * p_event)
{
    static uint8_t data_array[BLE_GAP_ADV_SET_DATA_SIZE_MAX];
    static uint8_t index = 0;

    switch (p_event->evt_type)
    {
        case APP_UART_DATA_READY:
            UNUSED_VARIABLE(app_uart_get(&data_array[index]));
            index++;

            if ((data_array[index - 1] == '\n') ||
                (data_array[index - 1] == '\r') ||
                (index >= BLE_GAP_ADV_SET_DATA_SIZE_MAX))
            {
                if (index > 1)
                {
                    NRF_LOG_DEBUG("Ready to advertise data over BLE");
                    NRF_LOG_HEXDUMP_DEBUG(data_array, index);

                    advertising_data_update(data_array);
                }

                index = 0;
            }
            break;

        case APP_UART_COMMUNICATION_ERROR:
            APP_ERROR_HANDLER(p_event->data.error_communication);
            break;

        case APP_UART_FIFO_ERROR:
            APP_ERROR_HANDLER(p_event->data.error_code);
            break;

        default:
            break;
    }
}
/**@snippet [Handling the data received over UART] */


/**@brief  Function for initializing the UART module.
 */
/**@snippet [UART Initialization] */
static void uart_init(void)
{
    uint32_t                     err_code;
    app_uart_comm_params_t const comm_params =
    {
        .rx_pin_no    = RX_PIN_NUMBER,
        .tx_pin_no    = TX_PIN_NUMBER,
        .rts_pin_no   = RTS_PIN_NUMBER,
        .cts_pin_no   = CTS_PIN_NUMBER,
        .flow_control = APP_UART_FLOW_CONTROL_DISABLED,
        .use_parity   = false,
#if defined (UART_PRESENT)
        .baud_rate    = NRF_UART_BAUDRATE_115200
#else
        .baud_rate    = NRF_UARTE_BAUDRATE_115200
#endif
    };

    APP_UART_FIFO_INIT(&comm_params,
                       UART_RX_BUF_SIZE,
                       UART_TX_BUF_SIZE,
                       uart_event_handle,
                       APP_IRQ_PRIORITY_LOWEST,
                       err_code);
    APP_ERROR_CHECK(err_code);
}
/**@snippet [UART Initialization] */

/**@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)
{
    ret_code_t             err_code;
    ble_advertising_init_t init;
	
    init = init_adv_data;
	
    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);

    init.config.ble_adv_fast_enabled  = true;
    init.config.ble_adv_fast_interval = APP_ADV_INTERVAL;
    init.config.ble_adv_fast_timeout  = APP_ADV_TIMEOUT_IN_SECONDS;

    err_code = ble_advertising_init(&m_advertising, &init);
    APP_ERROR_CHECK(err_code);

    ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG);

}

/**@brief Function for starting advertising.
 */
static void advertising_start(void)
{
    ret_code_t             err_code;

		err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
		APP_ERROR_CHECK(err_code);
}


/**@brief Function for initializing the BLE stack.
 *
 * @details Initializes the SoftDevice and the BLE event interrupt.
 */
static void ble_stack_init(void)
{
    ret_code_t err_code;

    err_code = nrf_sdh_enable_request();
    APP_ERROR_CHECK(err_code);

    // Configure the BLE stack using the default settings.
    // Fetch the start address of the application RAM.
    uint32_t ram_start = 0;
    err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start);
    APP_ERROR_CHECK(err_code);

    // Enable BLE stack.
    err_code = nrf_sdh_ble_enable(&ram_start);
    APP_ERROR_CHECK(err_code);

}


/**@brief Function for doing power management.
 */
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)
{
    uint32_t err_code;
    // Initialize.
	  uart_init();
    err_code = NRF_LOG_INIT(NULL);
    APP_ERROR_CHECK(err_code);
    timers_init();
    err_code = bsp_init(BSP_INIT_LED, NULL);
    APP_ERROR_CHECK(err_code);
    ble_stack_init();
    advertising_init();

    // Start execution.
    NRF_LOG_INFO("BLE Beacon started\r\n");
    advertising_start();


    // Enter main loop.
    for (;; )
    {
      power_manage();
    }
}


/**
 * @}
 */