:orphan:

.. title:: CONFIG_BT_L2CAP_TX_FRAG_COUNT

.. kconfig:: CONFIG_BT_L2CAP_TX_FRAG_COUNT

CONFIG_BT_L2CAP_TX_FRAG_COUNT
#############################

*Number of L2CAP TX fragment buffers*

Type: ``int``

Help
====

.. code-block:: none

    Number of buffers available for fragments of TX buffers. Warning:
    setting this to 0 means that the application must ensure that
    queued TX buffers never need to be fragmented, i.e. that the
    controller's buffer size is large enough. If this is not ensured,
    and there are no dedicated fragment buffers, a deadlock may occur.
    In most cases the default value of 2 is a safe bet.

Direct dependencies
===================

\ :kconfig:`BT_CONN <CONFIG_BT_CONN>` && \ :kconfig:`BT_HCI_HOST <CONFIG_BT_HCI_HOST>` && \ :kconfig:`BT_HCI <CONFIG_BT_HCI>` && \ :kconfig:`BT <CONFIG_BT>`

*(Includes any dependencies from ifs and menus.)*

Defaults
========

- \ :kconfig:`NET_BUF_TX_COUNT <CONFIG_NET_BUF_TX_COUNT>` if \ :kconfig:`NET_L2_BT <CONFIG_NET_L2_BT>`
- 2

Kconfig definition
==================



At ``<Zephyr Subsystem>/bluetooth/host/Kconfig.l2cap:16``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:44`` → ``<Zephyr Subsystem>/Kconfig:9`` → ``<Zephyr Subsystem>/bluetooth/Kconfig:174`` → ``<Zephyr Subsystem>/bluetooth/host/Kconfig:453``

Menu path: (Top) → Sub Systems and OS Services → Bluetooth → L2CAP Options

.. code-block:: kconfig

    config BT_L2CAP_TX_FRAG_COUNT
    	int "Number of L2CAP TX fragment buffers"
    	range 0 255
    	default NET_BUF_TX_COUNT if NET_L2_BT
    	default 2
    	depends on BT_CONN && BT_HCI_HOST && BT_HCI && BT
    	help
    	  Number of buffers available for fragments of TX buffers. Warning:
    	  setting this to 0 means that the application must ensure that
    	  queued TX buffers never need to be fragmented, i.e. that the
    	  controller's buffer size is large enough. If this is not ensured,
    	  and there are no dedicated fragment buffers, a deadlock may occur.
    	  In most cases the default value of 2 is a safe bet.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*