zephyr/samples/bluetooth/broadcast_audio_source/overlay-bt_ll_sw_split.conf

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# Zephyr Bluetooth Controller
CONFIG_BT_LL_SW_SPLIT=y
# Zephyr Controller tested maximum advertising data that can be set in a single HCI command
CONFIG_BT_CTLR_ADV_DATA_LEN_MAX=191
# Enable support for Broadcast ISO in Zephyr Bluetooth Controller
CONFIG_BT_CTLR_ADV_ISO=y
# Sufficient ISO PDU length for any BAP LC3 presets (155)
CONFIG_BT_CTLR_ADV_ISO_PDU_LEN_MAX=155
# Number of supported streams
CONFIG_BT_CTLR_ADV_ISO_STREAM_MAX=2
CONFIG_BT_CTLR_ISOAL_SOURCES=2
# FIXME: Host needs CONFIG_BT_ISO_TX_MTU + 4 bytes for sequence number, and optionally
# additional + 4 bytes for timestamp when not using BT_ISO_TIMESTAMP_NONE in bt_iso_chan_send(),
# otherwise Host tries to fragment ISO data.
# When Host is fixed, CONFIG_BT_CTLR_ISO_TX_BUFFER_SIZE can inherit the
# CONFIG_BT_ISO_TX_MTU value.
#
# Supports the highest SDU size required by any BAP LC3 presets (155)
CONFIG_BT_CTLR_ISO_TX_BUFFER_SIZE=163