// 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 __ESP_BT_H__
#define __ESP_BT_H__
#include <stdint.h>
#include <stdbool.h>
#include "esp_err.h"
#include "sdkconfig.h"
#include "esp_task.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Controller config options, depend on config mask.
* Config mask indicate which functions enabled, this means
* some options or parameters of some functions enabled by config mask.
*/
typedef struct {
uint16_t controller_task_stack_size; /*!< Bluetooth controller task stack size */
uint8_t controller_task_prio; /*!< Bluetooth controller task priority */
uint8_t hci_uart_no; /*!< If use UART1/2 as HCI IO interface, indicate UART number */
uint32_t hci_uart_baudrate; /*!< If use UART1/2 as HCI IO interface, indicate UART baudrate */
} esp_bt_controller_config_t;
#ifdef CONFIG_BT_ENABLED
#ifdef CONFIG_BT_HCI_UART_NO
#define BT_HCI_UART_NO_DEFAULT CONFIG_BT_HCI_UART_NO
#else
#define BT_HCI_UART_NO_DEFAULT 1
#endif /* BT_HCI_UART_NO_DEFAULT */
#ifdef CONFIG_BT_HCI_UART_BAUDRATE
#define BT_HCI_UART_BAUDRATE_DEFAULT CONFIG_BT_HCI_UART_BAUDRATE
#else
#define BT_HCI_UART_BAUDRATE_DEFAULT 921600
#endif /* BT_HCI_UART_BAUDRATE_DEFAULT */
#define BT_CONTROLLER_INIT_CONFIG_DEFAULT() { \
.controller_task_stack_size = ESP_TASK_BT_CONTROLLER_STACK, \
.controller_task_prio = ESP_TASK_BT_CONTROLLER_PRIO, \
.hci_uart_no = BT_HCI_UART_NO_DEFAULT, \
.hci_uart_baudrate = BT_HCI_UART_BAUDRATE_DEFAULT, \
};
#else
#define BT_CONTROLLER_INIT_CONFIG_DEFAULT() {0}; _Static_assert(0, "please enable bluetooth in menuconfig to use bt.h");
#endif
/**
* @brief Bluetooth mode for controller enable/disable
*/
typedef enum {
ESP_BT_MODE_IDLE = 0x00, /*!< Bluetooth is not running */
ESP_BT_MODE_BLE = 0x01, /*!< Run BLE mode */
ESP_BT_MODE_CLASSIC_BT = 0x02, /*!< Run Classic BT mode */
ESP_BT_MODE_BTDM = 0x03, /*!< Run dual mode */
} esp_bt_mode_t;
/**
* @brief Bluetooth controller enable/disable/initialised/de-initialised status
*/
typedef enum {
ESP_BT_CONTROLLER_STATUS_IDLE = 0,
ESP_BT_CONTROLLER_STATUS_INITED,
ESP_BT_CONTROLLER_STATUS_ENABLED,
ESP_BT_CONTROLLER_STATUS_NUM,
} esp_bt_controller_status_t;
/**
* @brief BLE tx power type
* ESP_BLE_PWR_TYPE_CONN_HDL0-8: for each connection, and only be set after connection completed.
* when disconnect, the correspond TX power is not effected.
* ESP_BLE_PWR_TYPE_ADV : for advertising/scan response.
* ESP_BLE_PWR_TYPE_SCAN : for scan.
* ESP_BLE_PWR_TYPE_DEFAULT : if each connection's TX power is not set, it will use this default value.
* if neither in scan mode nor in adv mode, it will use this default value.
* If none of power type is set, system will use ESP_PWR_LVL_P1 as default for ADV/SCAN/CONN0-9.
*/
typedef enum {
ESP_BLE_PWR_TYPE_CONN_HDL0 = 0, /*!< For connection handle 0 */
ESP_BLE_PWR_TYPE_CONN_HDL1 = 1, /*!< For connection handle 1 */
ESP_BLE_PWR_TYPE_CONN_HDL2 = 2, /*!< For connection handle 2 */
ESP_BLE_PWR_TYPE_CONN_HDL3 = 3, /*!< For connection handle 3 */
ESP_BLE_PWR_TYPE_CONN_HDL4 = 4, /*!< For connection handle 4 */
ESP_BLE_PWR_TYPE_CONN_HDL5 = 5, /*!< For connection handle 5 */
ESP_BLE_PWR_TYPE_CONN_HDL6 = 6, /*!< For connection handle 6 */
ESP_BLE_PWR_TYPE_CONN_HDL7 = 7, /*!< For connection handle 7 */
ESP_BLE_PWR_TYPE_CONN_HDL8 = 8, /*!< For connection handle 8 */
ESP_BLE_PWR_TYPE_ADV = 9, /*!< For advertising */
ESP_BLE_PWR_TYPE_SCAN = 10, /*!< For scan */
ESP_BLE_PWR_TYPE_DEFAULT = 11, /*!< For default, if not set other, it will use default value */
ESP_BLE_PWR_TYPE_NUM = 12, /*!< TYPE numbers */
} esp_ble_power_type_t;
/**
* @brief Bluetooth TX power level(index), it's just a index corresponding to power(dbm).
*/
typedef enum {
ESP_PWR_LVL_N14 = 0, /*!< Corresponding to -14dbm */
ESP_PWR_LVL_N11 = 1, /*!< Corresponding to -11dbm */
ESP_PWR_LVL_N8 = 2, /*!< Corresponding to -8dbm */
ESP_PWR_LVL_N5 = 3, /*!< Corresponding to -5dbm */
ESP_PWR_LVL_N2 = 4, /*!< Corresponding to -2dbm */
ESP_PWR_LVL_P1 = 5, /*!< Corresponding to 1dbm */
ESP_PWR_LVL_P4 = 6, /*!< Corresponding to 4dbm */
ESP_PWR_LVL_P7 = 7, /*!< Corresponding to 7dbm */
} esp_power_level_t;
/**
* @brief Set BLE TX power
* Connection Tx power should only be set after connection created.
* @param power_type : The type of which tx power, could set Advertising/Connection/Default and etc
* @param power_level: Power level(index) corresponding to absolute value(dbm)
* @return ESP_OK - success, other - failed
*/
esp_err_t esp_ble_tx_power_set(esp_ble_power_type_t power_type, esp_power_level_t power_level);
/**
* @brief Get BLE TX power
* Connection Tx power should only be get after connection created.
* @param power_type : The type of which tx power, could set Advertising/Connection/Default and etc
* @return >= 0 - Power level, < 0 - Invalid
*/
esp_power_level_t esp_ble_tx_power_get(esp_ble_power_type_t power_type);
/**
* @brief Initialize BT controller to allocate task and other resource.
* @param cfg: Initial configuration of BT controller.
* This function should be called only once, before any other BT functions are called.
* @return ESP_OK - success, other - failed
*/
esp_err_t esp_bt_controller_init(esp_bt_controller_config_t *cfg);
/**
* @brief De-initialize BT controller to free resource and delete task.
*
* This function should be called only once, after any other BT functions are called.
* This function is not whole completed, esp_bt_controller_init cannot called after this function.
* @return ESP_OK - success, other - failed
*/
esp_err_t esp_bt_controller_deinit(void);
/**
* @brief Enable BT controller.
* Due to a known issue, you cannot call esp_bt_controller_enable() a second time
* to change the controller mode dynamically. To change controller mode, call
* esp_bt_controller_disable() and then call esp_bt_controller_enable() with the new mode.
* @param mode : the mode(BLE/BT/BTDM) to enable.
* @return ESP_OK - success, other - failed
*/
esp_err_t esp_bt_controller_enable(esp_bt_mode_t mode);
/**
* @brief Disable BT controller
* @return ESP_OK - success, other - failed
*/
esp_err_t esp_bt_controller_disable(void);
/**
* @brief Get BT controller is initialised/de-initialised/enabled/disabled
* @return status value
*/
esp_bt_controller_status_t esp_bt_controller_get_status(void);
/** @brief esp_vhci_host_callback
* used for vhci call host function to notify what host need to do
*/
typedef struct esp_vhci_host_callback {
void (*notify_host_send_available)(void); /*!< callback used to notify that the host can send packet to controller */
int (*notify_host_recv)(uint8_t *data, uint16_t len); /*!< callback used to notify that the controller has a packet to send to the host*/
} esp_vhci_host_callback_t;
/** @brief esp_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 esp_vhci_host_check_send_available(void);
/** @brief esp_vhci_host_send_packet
* host send packet to controller
* @param data the packet point
*,@param len the packet length
*/
void esp_vhci_host_send_packet(uint8_t *data, uint16_t len);
/** @brief esp_vhci_host_register_callback
* register the vhci referece callback, the call back
* struct defined by vhci_host_callback structure.
* @param callback esp_vhci_host_callback type variable
*/
void esp_vhci_host_register_callback(const esp_vhci_host_callback_t *callback);
/** @brief esp_bt_controller_mem_release
* release the memory by mode, if never use the bluetooth mode
* it can release the .bbs, .data and other section to heap.
* The total size is about 70k bytes.
*
* esp_bt_controller_mem_release(mode) should be called only before esp_bt_controller_init()
* or after esp_bt_controller_deinit().
*
* Note that once BT controller memory is released, the process cannot be reversed. It means you can not use the bluetooth
* mode which you have released by this function.
*
* If your firmware will later upgrade the Bluetooth controller mode (BLE -> BT Classic or disabled -> enabled)
* then do not call this function.
*
* If the app calls esp_bt_controller_enable(ESP_BT_MODE_BLE) to use BLE only then it is safe to call
* esp_bt_controller_mem_release(ESP_BT_MODE_CLASSIC_BT) at initialisation time to free unused BT Classic memory.
*
* If user never use bluetooth controller, could call esp_bt_controller_mem_release(ESP_BT_MODE_BTDM)
* before esp_bt_controller_init or after esp_bt_controller_deinit.
*
* For example, user only use bluetooth to config SSID and PASSWORD of WIFI, after config, will never use bluetooth.
* Then, could call esp_bt_controller_mem_release(ESP_BT_MODE_BTDM) after esp_bt_controller_deinit.
*
* @param mode : the mode want to release memory
* @return ESP_OK - success, other - failed
*/
esp_err_t esp_bt_controller_mem_release(esp_bt_mode_t mode);
#ifdef __cplusplus
}
#endif
#endif /* __ESP_BT_H__ */