bluetooth.h File Reference

Bluetooth HCI driver API. More...

#include <stdbool.h>
#include <stdint.h>
#include <zephyr/net/buf.h>
#include <zephyr/bluetooth/buf.h>
#include <zephyr/bluetooth/addr.h>
#include <zephyr/bluetooth/hci_vs.h>
#include <zephyr/device.h>

Go to the source code of this file.

Data Structures
struct	bt_hci_setup_params
struct	bt_hci_driver_api

Macros
#define	BT_DT_HCI_QUIRK_OR(node_id, prop, idx)   DT_STRING_TOKEN_BY_IDX(node_id, prop, idx)
#define	BT_DT_HCI_QUIRKS_GET(node_id)
#define	BT_DT_HCI_QUIRKS_INST_GET(inst)   BT_DT_HCI_QUIRKS_GET(DT_DRV_INST(inst))
#define	BT_DT_HCI_NAME_GET(node_id)   DT_PROP_OR(node_id, bt_hci_name, "HCI")
#define	BT_DT_HCI_NAME_INST_GET(inst)   BT_DT_HCI_NAME_GET(DT_DRV_INST(inst))
#define	BT_DT_HCI_BUS_GET(node_id)   DT_STRING_TOKEN_OR(node_id, bt_hci_bus, BT_HCI_BUS_VIRTUAL)
#define	BT_DT_HCI_BUS_INST_GET(inst)   BT_DT_HCI_BUS_GET(DT_DRV_INST(inst))

Typedefs
typedef int(*	bt_hci_recv_t) (const struct device *dev, struct net_buf *buf)

Enumerations
enum	{ BT_HCI_QUIRK_NO_RESET = BIT(0) , BT_HCI_QUIRK_NO_AUTO_DLE = BIT(1) }
enum	bt_hci_bus {   BT_HCI_BUS_VIRTUAL = 0 , BT_HCI_BUS_USB = 1 , BT_HCI_BUS_PCCARD = 2 , BT_HCI_BUS_UART = 3 ,   BT_HCI_BUS_RS232 = 4 , BT_HCI_BUS_PCI = 5 , BT_HCI_BUS_SDIO = 6 , BT_HCI_BUS_SPI = 7 ,   BT_HCI_BUS_I2C = 8 , BT_HCI_BUS_IPM = 9 }
	Possible values for the 'bus' member of the bt_hci_driver struct. More...

Functions
static int	bt_hci_open (const struct device *dev, bt_hci_recv_t recv)
	Open the HCI transport.
static int	bt_hci_close (const struct device *dev)
	Close the HCI transport.
static int	bt_hci_send (const struct device *dev, struct net_buf *buf)
	Send HCI buffer to controller.
static int	bt_hci_setup (const struct device *dev, struct bt_hci_setup_params *params)
	HCI vendor-specific setup.
int	bt_hci_transport_setup (const struct device *dev)
	Setup the HCI transport, which usually means to reset the Bluetooth IC.
int	bt_hci_transport_teardown (const struct device *dev)
	Teardown the HCI transport.
struct net_buf *	bt_hci_evt_create (uint8_t evt, uint8_t len)
	Allocate an HCI event buffer.
struct net_buf *	bt_hci_cmd_complete_create (uint16_t op, uint8_t plen)
	Allocate an HCI Command Complete event buffer.
struct net_buf *	bt_hci_cmd_status_create (uint16_t op, uint8_t status)
	Allocate an HCI Command Status event buffer.

Detailed Description

Bluetooth HCI driver API.

Copyright (c) 2024 Johan Hedberg

SPDX-License-Identifier: Apache-2.0

Function Documentation

bt_hci_cmd_complete_create()

struct net_buf * bt_hci_cmd_complete_create	(	uint16_t	op,
		uint8_t	plen
	)

Allocate an HCI Command Complete event buffer.

This function allocates a new buffer for HCI Command Complete event. It is given the OpCode (encoded e.g. using the BT_OP macro) and the total length of the parameters. Upon successful return the buffer is ready to have the parameters encoded into it.

Parameters

op	HCI command OpCode.
plen	Length of command parameters.

Returns

Newly allocated buffer.

bt_hci_cmd_status_create()

struct net_buf * bt_hci_cmd_status_create	(	uint16_t	op,
		uint8_t	status
	)

Allocate an HCI Command Status event buffer.

This function allocates a new buffer for HCI Command Status event. It is given the OpCode (encoded e.g. using the BT_OP macro) and the status code. Upon successful return the buffer is ready to have the parameters encoded into it.

Parameters

op	HCI command OpCode.
status	Status code.

Returns

Newly allocated buffer.

bt_hci_evt_create()

struct net_buf * bt_hci_evt_create	(	uint8_t	evt,
		uint8_t	len
	)

Allocate an HCI event buffer.

This function allocates a new buffer for an HCI event. It is given the event code and the total length of the parameters. Upon successful return the buffer is ready to have the parameters encoded into it.

Parameters

evt	HCI event OpCode.
len	Length of event parameters.

Returns

Newly allocated buffer.

bt_hci_transport_setup()

int bt_hci_transport_setup

(

const struct device *

dev

)

Setup the HCI transport, which usually means to reset the Bluetooth IC.

Note

A weak version of this function is included in the H4 driver, so defining it is optional per board.

Parameters

dev	The device structure for the bus connecting to the IC

Returns

0 on success, negative error value on failure

bt_hci_transport_teardown()

int bt_hci_transport_teardown

(

const struct device *

dev

)

Teardown the HCI transport.

Note

A weak version of this function is included in the IPC driver, so defining it is optional. NRF5340 includes support to put network core in reset state.

Parameters

dev	The device structure for the bus connecting to the IC

Returns

0 on success, negative error value on faulure