ble_lbs.c

/* Copyright (c) 2012 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.
 *
 */

/* Attention! 
*  To maintain compliance with Nordic Semiconductor ASA’s Bluetooth profile 
*  qualification listings, this section of source code must not be modified.
*/

#include <string.h>
#include "nordic_common.h"

#include "ble_srv_common.h"
#include "app_util.h"
#include "ble_lbs.h"

/**@brief Function for handling the Connect event.
 *
 * @param[in]   p_lbs       LED Button service structure.
 * @param[in]   p_ble_evt   Event received from the BLE stack.
 */
static void on_connect(ble_lbs_t * p_lbs, ble_evt_t * p_ble_evt)
{
    p_lbs->conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
}


/**@brief Function for handling the Disconnect event.
 *
 * @param[in]   p_lbs       LED Button structure.
 * @param[in]   p_ble_evt   Event received from the BLE stack.
 */
static void on_disconnect(ble_lbs_t * p_lbs, ble_evt_t * p_ble_evt)
{
    UNUSED_PARAMETER(p_ble_evt);
    p_lbs->conn_handle = BLE_CONN_HANDLE_INVALID;
}

/**@brief Function for handling the Write event.
 *
 * @param[in]   p_lbs       LED Button structure.
 * @param[in]   p_ble_evt   Event received from the BLE stack.
 */
static void on_write(ble_lbs_t * p_lbs, ble_evt_t * p_ble_evt)
{
	ble_gatts_evt_write_t * p_evt_write = &p_ble_evt->evt.gatts_evt.params.write;

	if ((p_evt_write->handle == p_lbs->led_char_handles.value_handle) && (p_evt_write->len == 1) 
																																		&& (p_lbs->led_write_handler != NULL))
	{
		p_lbs->led_write_handler(p_lbs, p_evt_write->data[0]);
	} 
}

uint32_t ble_lbs_on_button_change(ble_lbs_t * p_lbs, uint8_t button_state)
{
	ble_gatts_hvx_params_t params;
	uint16_t len = sizeof(button_state);

	memset(&params, 0, sizeof(params));
	params.type = BLE_GATT_HVX_NOTIFICATION;
	params.handle = p_lbs->button_char_handles.value_handle;
	params.p_data = &button_state;
	params.p_len = &len;

	return sd_ble_gatts_hvx(p_lbs->conn_handle, &params);
}

void ble_lbs_on_ble_evt(ble_lbs_t * p_lbs, ble_evt_t * p_ble_evt)
{
    switch (p_ble_evt->header.evt_id)
    {
        case BLE_GAP_EVT_CONNECTED:
            on_connect(p_lbs, p_ble_evt);
            break;

        case BLE_GAP_EVT_DISCONNECTED:
            on_disconnect(p_lbs, p_ble_evt);
            break;

        case BLE_GATTS_EVT_WRITE:
            on_write(p_lbs, p_ble_evt);
            break;

        default:
            // No implementation needed.
            break;
    }
}

/**@brief Function for adding the LED characteristic.
 *
 * @param[in]   p_lbs        LED Button Service structure.
 *
 * @return      NRF_SUCCESS on success, otherwise an error code.
 */
static uint32_t led_char_add(ble_lbs_t * p_lbs)
{
    ble_gatts_char_md_t char_md;
    ble_gatts_attr_t    attr_char_value;
    ble_uuid_t          ble_uuid;
    ble_gatts_attr_md_t attr_md;

    // Add LED characteristic.
    memset(&char_md, 0, sizeof(char_md));

    char_md.char_props.read   = 1;
    char_md.char_props.write  = 1;
    char_md.p_char_user_desc  = NULL;
    char_md.p_char_pf         = NULL;
    char_md.p_user_desc_md    = NULL;
    char_md.p_cccd_md         = NULL;
    char_md.p_sccd_md         = NULL;

    ble_uuid.type = p_lbs->uuid_type;
	ble_uuid.uuid = LBS_UUID_LED_CHAR;

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

    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm);
	BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.write_perm);
    attr_md.vloc       = BLE_GATTS_VLOC_STACK;
    attr_md.rd_auth    = 0;
    attr_md.wr_auth    = 0;
    attr_md.vlen       = 0;

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

    attr_char_value.p_uuid    = &ble_uuid;
    attr_char_value.p_attr_md = &attr_md;
    attr_char_value.init_len  = sizeof(uint8_t);
    attr_char_value.init_offs = 0;
    attr_char_value.max_len   = sizeof(uint8_t);
    attr_char_value.p_value   = NULL;

    return sd_ble_gatts_characteristic_add(p_lbs->service_handle, &char_md, &attr_char_value, &p_lbs->led_char_handles);
}

/**@brief Function for adding the Button characteristic.
 *
 * @param[in]   p_lbs        LED Button Service structure.
 *
 * @return      NRF_SUCCESS on success, otherwise an error code.
 */
static uint32_t button_char_add(ble_lbs_t * p_lbs)
{
    ble_gatts_char_md_t char_md;
    ble_gatts_attr_md_t cccd_md;
    ble_gatts_attr_t    attr_char_value;
    ble_uuid_t          ble_uuid;
    ble_gatts_attr_md_t attr_md;

    // Add Button characteristic.
	memset(&cccd_md, 0, sizeof(cccd_md));

	BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
	BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.write_perm);
	cccd_md.vloc       = BLE_GATTS_VLOC_STACK;

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

    char_md.char_props.read   = 1;
    char_md.char_props.notify = 1;
    char_md.p_char_user_desc  = NULL;
    char_md.p_char_pf         = NULL;
    char_md.p_user_desc_md    = NULL;
    char_md.p_cccd_md         = &cccd_md;
    char_md.p_sccd_md         = NULL;

	ble_uuid.type = p_lbs->uuid_type;
	ble_uuid.uuid = LBS_UUID_BUTTON_CHAR;

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

    BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm);
	BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS(&attr_md.write_perm);
    attr_md.vloc       = BLE_GATTS_VLOC_STACK;
    attr_md.rd_auth    = 0;
    attr_md.wr_auth    = 0;
    attr_md.vlen       = 0;

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

    attr_char_value.p_uuid    = &ble_uuid;
    attr_char_value.p_attr_md = &attr_md;
    attr_char_value.init_len  = sizeof(uint8_t);
    attr_char_value.init_offs = 0;
    attr_char_value.max_len   = sizeof(uint8_t);
    attr_char_value.p_value   = NULL;

    return sd_ble_gatts_characteristic_add(p_lbs->service_handle, &char_md, &attr_char_value, &p_lbs->button_char_handles);
}

uint32_t ble_lbs_init(ble_lbs_t * p_lbs, const ble_lbs_init_t * p_lbs_init)
{
    uint32_t      err_code;
	ble_uuid128_t base_uuid = {LBS_UUID_BASE};
    ble_uuid_t    ble_uuid;

    // Initialize service structure.
    p_lbs->conn_handle       = BLE_CONN_HANDLE_INVALID;
    p_lbs->led_write_handler = p_lbs_init->led_write_handler;

    err_code = sd_ble_uuid_vs_add(&base_uuid, &p_lbs->uuid_type);
    if (err_code != NRF_SUCCESS)
    {
    		return err_code;
    }

    // Add service.
    ble_uuid.type = p_lbs->uuid_type;
    ble_uuid.uuid = LBS_UUID_SERVICE;

    err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY, &ble_uuid, &p_lbs->service_handle);
    if (err_code != NRF_SUCCESS)
    {
    		return err_code;
    }

    // Add characteristics.
    err_code = button_char_add(p_lbs);
    if (err_code != NRF_SUCCESS)
    {
    		return err_code;
    }
    err_code = led_char_add(p_lbs);
    if (err_code != NRF_SUCCESS)
    {
    		return err_code;
    }

    return NRF_SUCCESS;
}