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49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
// Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <string.h>
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#include "esp_gatt_common_api.h"
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#include "esp_bt_main.h"
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#include "esp_gatt_defs.h"
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#include "btc_gatt_common.h"
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/**
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* @brief This function is called to set local MTU,
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* the function is called before BLE connection.
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*
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* @param[in] mtu: the size of MTU.
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*
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* @return
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* - ESP_OK: success
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* - other: failed
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*
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*/
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esp_err_t esp_ble_gatt_set_local_mtu (uint16_t mtu)
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{
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btc_msg_t msg;
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btc_ble_gatt_com_args_t arg;
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ESP_BLUEDROID_STATUS_CHECK(ESP_BLUEDROID_STATUS_ENABLED);
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if ((mtu < ESP_GATT_DEF_BLE_MTU_SIZE) || (mtu > ESP_GATT_MAX_MTU_SIZE)) {
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return ESP_ERR_INVALID_SIZE;
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}
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msg.sig = BTC_SIG_API_CALL;
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msg.pid = BTC_PID_GATT_COMMON;
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msg.act = BTC_GATT_ACT_SET_LOCAL_MTU;
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arg.set_mtu.mtu = mtu;
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return (btc_transfer_context(&msg, &arg, sizeof(btc_ble_gatt_com_args_t), NULL) == BT_STATUS_SUCCESS ? ESP_OK : ESP_FAIL);
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} |