esp-idf/components/bt/include/bt.h

// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at

//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef __BT_H__
#define __BT_H__

#include <stdint.h>
#include "esp_err.h"

#ifdef __cplusplus
extern "C" {
#endif


/**
 * @brief  Initialize BT controller
 *
 * This function should be called only once, before any other BT functions are called.
 */
void bt_controller_init();

/** @brief: vhci_host_callback
 *  used for vhci call host function to notify what host need to do
 *  
 *  notify_host_send_available: notify host can send packet to controller
 *  notify_host_recv: notify host that controller has packet send to host
 */
typedef struct vhci_host_callback {

    void (*notify_host_send_available)(void);
    int (*notify_host_recv)(uint8_t *data, uint16_t len);
} vhci_host_callback_t;

/** @brief: API_vhci_host_check_send_available
 *  used for check actively if the host can send packet to controller or not.
 *  return true for ready to send, false means cannot send packet
 */
bool API_vhci_host_check_send_available(void);

/** @brief: API_vhci_host_send_packet
 * host send packet to controller
 * param data is the packet point, the param len is the packet length
 * return void
 */
void API_vhci_host_send_packet(uint8_t *data, uint16_t len);

/** @brief: API_vhci_host_register_callback
 * register the vhci referece callback, the call back
 * struct defined by vhci_host_callback structure.
 * param is the vhci_host_callback type variable
 */
void API_vhci_host_register_callback(const vhci_host_callback_t *callback);

#ifdef __cplusplus
}
#endif

#endif /* __BT_H__ */