/
ble_rgb_btn.c
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/
ble_rgb_btn.c
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/* Copyright (c) 2016 joakimtoe
*
* This software may be modified and distributed under the terms
* of the MIT license. See the LICENSE file for details.
*/
#include "ble_rgb_btn.h"
#include <string.h>
#include "sdk_common.h"
#include "ble_srv_common.h"
#include "app_util.h"
/**@brief Function for handling the Connect event.
*
* @param[in] p_rgb_btn RGB Button Service structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
static void on_connect(ble_rgb_btn_t * p_rgb_btn, ble_evt_t * p_ble_evt)
{
p_rgb_btn->conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
}
/**@brief Function for handling the Disconnect event.
*
* @param[in] p_rgb_btn RGB Button Service structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
static void on_disconnect(ble_rgb_btn_t * p_rgb_btn, ble_evt_t * p_ble_evt)
{
UNUSED_PARAMETER(p_ble_evt);
p_rgb_btn->conn_handle = BLE_CONN_HANDLE_INVALID;
}
/**@brief Function for handling the Write event.
*
* @param[in] p_rgb_btn RGB Button Service structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
static void on_write(ble_rgb_btn_t * p_rgb_btn, 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_rgb_btn->btn_char_handles.cccd_handle) &&
(p_evt_write->len == 2)
)
{
if (ble_srv_is_notification_enabled(p_evt_write->data))
{
p_rgb_btn->is_notification_enabled = true;
}
else
{
p_rgb_btn->is_notification_enabled = false;
}
}
else if ((p_evt_write->handle == p_rgb_btn->rgb_char_handles.value_handle) &&
(p_evt_write->len == 3) &&
(p_rgb_btn->rgb_handler != NULL))
{
p_rgb_btn->rgb_handler(p_rgb_btn, p_evt_write->data);
}
}
void ble_rgb_btn_on_ble_evt(ble_rgb_btn_t * p_rgb_btn, ble_evt_t * p_ble_evt)
{
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_CONNECTED:
on_connect(p_rgb_btn, p_ble_evt);
break;
case BLE_GAP_EVT_DISCONNECTED:
on_disconnect(p_rgb_btn, p_ble_evt);
break;
case BLE_GATTS_EVT_WRITE:
on_write(p_rgb_btn, p_ble_evt);
break;
default:
// No implementation needed.
break;
}
}
/**@brief Function for adding the LED characteristic.
*
*/
static uint32_t rgb_char_add(ble_rgb_btn_t * p_rgb_btn, const ble_rgb_btn_init_t * p_rgb_btn_init)
{
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;
uint8_t default_rgb[3] = {0, 0, 0};
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_rgb_btn->uuid_type;
ble_uuid.uuid = RGB_BTN_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)*3;
attr_char_value.init_offs = 0;
attr_char_value.max_len = sizeof(uint8_t)*3;
attr_char_value.p_value = default_rgb;
return sd_ble_gatts_characteristic_add(p_rgb_btn->service_handle, &char_md,
&attr_char_value,
&p_rgb_btn->rgb_char_handles);
}
/**@brief Function for adding the Button characteristic.
*
*/
static uint32_t btn_char_add(ble_rgb_btn_t * p_rgb_btn, const ble_rgb_btn_init_t * p_rgb_btn_init)
{
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;
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_rgb_btn->uuid_type;
ble_uuid.uuid = RGB_BTN_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_rgb_btn->service_handle, &char_md,
&attr_char_value,
&p_rgb_btn->btn_char_handles);
}
uint32_t ble_rgb_btn_init(ble_rgb_btn_t * p_rgb_btn, const ble_rgb_btn_init_t * p_rgb_btn_init)
{
uint32_t err_code;
ble_uuid_t ble_uuid;
// Initialize service structure
p_rgb_btn->conn_handle = BLE_CONN_HANDLE_INVALID;
p_rgb_btn->rgb_handler = p_rgb_btn_init->rgb_handler;
p_rgb_btn->is_notification_enabled = false;
// Add service
ble_uuid128_t base_uuid = {RGB_BTN_UUID_BASE};
err_code = sd_ble_uuid_vs_add(&base_uuid, &p_rgb_btn->uuid_type);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
ble_uuid.type = p_rgb_btn->uuid_type;
ble_uuid.uuid = RGB_BTN_UUID_SERVICE;
err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY, &ble_uuid, &p_rgb_btn->service_handle);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
err_code = btn_char_add(p_rgb_btn, p_rgb_btn_init);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
err_code = rgb_char_add(p_rgb_btn, p_rgb_btn_init);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
return NRF_SUCCESS;
}
uint32_t ble_rgb_btn_set(ble_rgb_btn_t * p_rgb_btn, uint8_t btn_state)
{
ble_gatts_hvx_params_t params;
uint16_t length = 1;
VERIFY_PARAM_NOT_NULL(p_rgb_btn);
if ((p_rgb_btn->conn_handle == BLE_CONN_HANDLE_INVALID) || (!p_rgb_btn->is_notification_enabled))
{
return NRF_ERROR_INVALID_STATE;
}
memset(¶ms, 0, sizeof(params));
params.type = BLE_GATT_HVX_NOTIFICATION;
params.handle = p_rgb_btn->btn_char_handles.value_handle;
params.p_data = &btn_state;
params.p_len = &length;
return sd_ble_gatts_hvx(p_rgb_btn->conn_handle, ¶ms);
}