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EPD-nRF5/components/ble/ble_services/ble_bas/ble_bas.c
Shuanglei Tao 75b5b9105a upgrade to sdk12
2024-12-19 15:08:21 +08:00

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/**
* Copyright (c) 2012 - 2017, 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
* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* 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.
*
*/
/* Attention!
* To maintain compliance with Nordic Semiconductor ASA<53>s Bluetooth profile
* qualification listings, this section of source code must not be modified.
*/
#include "sdk_common.h"
#if NRF_MODULE_ENABLED(BLE_BAS)
#include "ble_bas.h"
#include <string.h>
#include "ble_srv_common.h"
#define INVALID_BATTERY_LEVEL 255
/**@brief Function for handling the Connect event.
*
* @param[in] p_bas Battery Service structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
static void on_connect(ble_bas_t * p_bas, ble_evt_t * p_ble_evt)
{
p_bas->conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
}
/**@brief Function for handling the Disconnect event.
*
* @param[in] p_bas Battery Service structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
static void on_disconnect(ble_bas_t * p_bas, ble_evt_t * p_ble_evt)
{
UNUSED_PARAMETER(p_ble_evt);
p_bas->conn_handle = BLE_CONN_HANDLE_INVALID;
}
/**@brief Function for handling the Write event.
*
* @param[in] p_bas Battery Service structure.
* @param[in] p_ble_evt Event received from the BLE stack.
*/
static void on_write(ble_bas_t * p_bas, ble_evt_t * p_ble_evt)
{
if (p_bas->is_notification_supported)
{
ble_gatts_evt_write_t * p_evt_write = &p_ble_evt->evt.gatts_evt.params.write;
if (
(p_evt_write->handle == p_bas->battery_level_handles.cccd_handle)
&&
(p_evt_write->len == 2)
)
{
// CCCD written, call application event handler
if (p_bas->evt_handler != NULL)
{
ble_bas_evt_t evt;
if (ble_srv_is_notification_enabled(p_evt_write->data))
{
evt.evt_type = BLE_BAS_EVT_NOTIFICATION_ENABLED;
}
else
{
evt.evt_type = BLE_BAS_EVT_NOTIFICATION_DISABLED;
}
p_bas->evt_handler(p_bas, &evt);
}
}
}
}
void ble_bas_on_ble_evt(ble_bas_t * p_bas, ble_evt_t * p_ble_evt)
{
if (p_bas == NULL || p_ble_evt == NULL)
{
return;
}
switch (p_ble_evt->header.evt_id)
{
case BLE_GAP_EVT_CONNECTED:
on_connect(p_bas, p_ble_evt);
break;
case BLE_GAP_EVT_DISCONNECTED:
on_disconnect(p_bas, p_ble_evt);
break;
case BLE_GATTS_EVT_WRITE:
on_write(p_bas, p_ble_evt);
break;
default:
// No implementation needed.
break;
}
}
/**@brief Function for adding the Battery Level characteristic.
*
* @param[in] p_bas Battery Service structure.
* @param[in] p_bas_init Information needed to initialize the service.
*
* @return NRF_SUCCESS on success, otherwise an error code.
*/
static uint32_t battery_level_char_add(ble_bas_t * p_bas, const ble_bas_init_t * p_bas_init)
{
uint32_t err_code;
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;
uint8_t initial_battery_level;
uint8_t encoded_report_ref[BLE_SRV_ENCODED_REPORT_REF_LEN];
uint8_t init_len;
// Add Battery Level characteristic
if (p_bas->is_notification_supported)
{
memset(&cccd_md, 0, sizeof(cccd_md));
// According to BAS_SPEC_V10, the read operation on cccd should be possible without
// authentication.
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&cccd_md.read_perm);
cccd_md.write_perm = p_bas_init->battery_level_char_attr_md.cccd_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 = (p_bas->is_notification_supported) ? 1 : 0;
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 = (p_bas->is_notification_supported) ? &cccd_md : NULL;
char_md.p_sccd_md = NULL;
BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_BATTERY_LEVEL_CHAR);
memset(&attr_md, 0, sizeof(attr_md));
attr_md.read_perm = p_bas_init->battery_level_char_attr_md.read_perm;
attr_md.write_perm = p_bas_init->battery_level_char_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;
initial_battery_level = p_bas_init->initial_batt_level;
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 = &initial_battery_level;
err_code = sd_ble_gatts_characteristic_add(p_bas->service_handle, &char_md,
&attr_char_value,
&p_bas->battery_level_handles);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
if (p_bas_init->p_report_ref != NULL)
{
// Add Report Reference descriptor
BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_REPORT_REF_DESCR);
memset(&attr_md, 0, sizeof(attr_md));
attr_md.read_perm = p_bas_init->battery_level_report_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;
init_len = ble_srv_report_ref_encode(encoded_report_ref, p_bas_init->p_report_ref);
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 = init_len;
attr_char_value.init_offs = 0;
attr_char_value.max_len = attr_char_value.init_len;
attr_char_value.p_value = encoded_report_ref;
err_code = sd_ble_gatts_descriptor_add(p_bas->battery_level_handles.value_handle,
&attr_char_value,
&p_bas->report_ref_handle);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
}
else
{
p_bas->report_ref_handle = BLE_GATT_HANDLE_INVALID;
}
return NRF_SUCCESS;
}
uint32_t ble_bas_init(ble_bas_t * p_bas, const ble_bas_init_t * p_bas_init)
{
if (p_bas == NULL || p_bas_init == NULL)
{
return NRF_ERROR_NULL;
}
uint32_t err_code;
ble_uuid_t ble_uuid;
// Initialize service structure
p_bas->evt_handler = p_bas_init->evt_handler;
p_bas->conn_handle = BLE_CONN_HANDLE_INVALID;
p_bas->is_notification_supported = p_bas_init->support_notification;
p_bas->battery_level_last = INVALID_BATTERY_LEVEL;
// Add service
BLE_UUID_BLE_ASSIGN(ble_uuid, BLE_UUID_BATTERY_SERVICE);
err_code = sd_ble_gatts_service_add(BLE_GATTS_SRVC_TYPE_PRIMARY, &ble_uuid, &p_bas->service_handle);
if (err_code != NRF_SUCCESS)
{
return err_code;
}
// Add battery level characteristic
return battery_level_char_add(p_bas, p_bas_init);
}
uint32_t ble_bas_battery_level_update(ble_bas_t * p_bas, uint8_t battery_level)
{
if (p_bas == NULL)
{
return NRF_ERROR_NULL;
}
uint32_t err_code = NRF_SUCCESS;
ble_gatts_value_t gatts_value;
if (battery_level != p_bas->battery_level_last)
{
// Initialize value struct.
memset(&gatts_value, 0, sizeof(gatts_value));
gatts_value.len = sizeof(uint8_t);
gatts_value.offset = 0;
gatts_value.p_value = &battery_level;
// Update database.
err_code = sd_ble_gatts_value_set(p_bas->conn_handle,
p_bas->battery_level_handles.value_handle,
&gatts_value);
if (err_code == NRF_SUCCESS)
{
// Save new battery value.
p_bas->battery_level_last = battery_level;
}
else
{
return err_code;
}
// Send value if connected and notifying.
if ((p_bas->conn_handle != BLE_CONN_HANDLE_INVALID) && p_bas->is_notification_supported)
{
ble_gatts_hvx_params_t hvx_params;
memset(&hvx_params, 0, sizeof(hvx_params));
hvx_params.handle = p_bas->battery_level_handles.value_handle;
hvx_params.type = BLE_GATT_HVX_NOTIFICATION;
hvx_params.offset = gatts_value.offset;
hvx_params.p_len = &gatts_value.len;
hvx_params.p_data = gatts_value.p_value;
err_code = sd_ble_gatts_hvx(p_bas->conn_handle, &hvx_params);
}
else
{
err_code = NRF_ERROR_INVALID_STATE;
}
}
return err_code;
}
#endif // NRF_MODULE_ENABLED(BLE_BAS)
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