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# Zephyr Bluetooth Controller configuration options
# Copyright (c) 2016-2017 Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0
if BT_LL_SW_SPLIT
config BT_LLL_VENDOR_NORDIC
bool "Use Nordic LLL"
depends on SOC_COMPATIBLE_NRF
select BT_HAS_HCI_VS
select ENTROPY_NRF5_RNG
select ENTROPY_NRF5_BIAS_CORRECTION
select BT_CTLR_LE_ENC_SUPPORT if !BT_CTLR_DATA_LENGTH_CLEAR && \
!BT_CTLR_PHY_2M_NRF
select BT_CTLR_CONN_PARAM_REQ_SUPPORT
select BT_CTLR_EXT_REJ_IND_SUPPORT
select BT_CTLR_PER_INIT_FEAT_XCHG_SUPPORT
select BT_CTLR_DATA_LEN_UPDATE_SUPPORT if HAS_HW_NRF_CCM_LFLEN_8BIT || \
BT_CTLR_DATA_LENGTH_CLEAR
select BT_CTLR_PRIVACY_SUPPORT if !SOC_SERIES_NRF51X
select BT_CTLR_EXT_SCAN_FP_SUPPORT
select BT_CTLR_PHY_2M_SUPPORT if HAS_HW_NRF_RADIO_BLE_2M || \
BT_CTLR_PHY_2M_NRF
select BT_CTLR_PHY_CODED_SUPPORT if HAS_HW_NRF_RADIO_BLE_CODED
select BT_CTLR_PHY_UPDATE_SUPPORT if BT_CTLR_PHY_2M_SUPPORT || \
BT_CTLR_PHY_CODED_SUPPORT
select BT_CTLR_ADV_EXT_SUPPORT
select BT_CTLR_ADV_PERIODIC_SUPPORT
select BT_CTLR_SYNC_PERIODIC_SUPPORT
select BT_CTLR_ADV_ISO_SUPPORT
select BT_CTLR_SYNC_ISO_SUPPORT
select BT_CTLR_CENTRAL_ISO_SUPPORT
select BT_CTLR_PERIPHERAL_ISO_SUPPORT
select BT_CTLR_DF_SUPPORT if HAS_HW_NRF_RADIO_DFE
select BT_CTLR_CTEINLINE_SUPPORT if HAS_HW_NRF_RADIO_DFE
select BT_CTLR_CHAN_SEL_2_SUPPORT
select BT_CTLR_MIN_USED_CHAN_SUPPORT
select BT_CTLR_SCA_UPDATE_SUPPORT if !BT_LL_SW_LLCP_LEGACY
select BT_CTLR_DTM_HCI_SUPPORT
select BT_CTLR_CONN_RSSI_SUPPORT
select BT_CTLR_XTAL_ADVANCED_SUPPORT
select BT_CTLR_SCHED_ADVANCED_SUPPORT
select BT_CTLR_TIFS_HW_SUPPORT
select BT_CTLR_ULL_LLL_PRIO_SUPPORT
select BT_TICKER_UPDATE if BT_BROADCASTER || BT_CONN || \
(BT_OBSERVER && BT_CTLR_ADV_EXT)
select BT_TICKER_NEXT_SLOT_GET if (BT_BROADCASTER && \
BT_CTLR_ADV_EXT) || \
BT_CTLR_ADV_PERIODIC
select BT_TICKER_REMAINDER_GET if BT_BROADCASTER && BT_CTLR_ADV_EXT
select BT_TICKER_LAZY_GET if BT_CTLR_ADV_PERIODIC
default y
help
Use Nordic Lower Link Layer implementation.
config BT_LLL_VENDOR_OPENISA
bool "Use OpenISA LLL"
depends on SOC_OPENISA_RV32M1_RISCV32
select BT_CTLR_PHY_UPDATE_SUPPORT
select BT_CTLR_EXT_REJ_IND_SUPPORT
select BT_HAS_HCI_VS
select BT_CTLR_LE_ENC_SUPPORT if !BT_CTLR_DATA_LENGTH_CLEAR
select BT_CTLR_PRIVACY_SUPPORT
select BT_TICKER_UPDATE if BT_BROADCASTER || BT_CONN
default y
help
Use OpenISA Lower Link Layer implementation.
config BT_CTLR_XTAL_ADVANCED_SUPPORT
bool
config BT_CTLR_SCHED_ADVANCED_SUPPORT
bool
config BT_CTLR_TIFS_HW_SUPPORT
bool
config BT_CTLR_ULL_LLL_PRIO_SUPPORT
bool
choice BT_LL_SW_LLCP_IMPL
prompt "Bluetooth Low Energy Software Link Layer Control Procedure Implementation"
default BT_LL_SW_LLCP
help
Select the Bluetooth Low Energy Software Link Layer Control Procedure implementation.
config BT_LL_SW_LLCP_LEGACY
bool "Legacy implementation (DEPRECATED)"
depends on !BT_CTLR_DF_CONN_CTE_RX && !BT_CTLR_DF_CONN_CTE_TX
select DEPRECATED
help
Use the Bluetooth Low Energy Software Link Layer Legacy Control Procedure implementation.
config BT_LL_SW_LLCP
bool "State-machine based implementation, replacing the legacy one"
help
Use the new Bluetooth Low Energy Software Link Layer Control Procedure implementation.
endchoice
config BT_CTLR_RX_PRIO_STACK_SIZE
# Controller's Co-Operative high priority Rx thread stack size.
int "High priority Rx thread stack size"
default 448
config BT_CTLR_SETTINGS
bool "Settings System"
depends on SETTINGS
help
Enable use of settings system in controller.
config BT_CTLR_VERSION_SETTINGS
bool "Version Settings"
depends on BT_CTLR_SETTINGS
help
Make the controller's Company Id and Subversion Number configurable
through settings system.
config BT_CTLR_COMPANY_ID
hex "Controller Company Id"
default BT_COMPANY_ID
range 0x0000 0xFFFF
help
Set the Bluetooth Company Identifier that will be used in
the VERSION_IND PDU. Uses BT_COMPANY_ID by default, although
silicon vendors and hardware manufacturers can set their own
Company Identifier for the controller. The full list of Bluetooth
Company Identifiers can be found here:
https://www.bluetooth.com/specifications/assigned-numbers/company-identifiers
config BT_CTLR_SUBVERSION_NUMBER
hex "Subversion Number"
default 0xFFFF
range 0x0000 0xFFFF
help
Set the Subversion Number that will be used in VERSION_IND PDU.
config BT_CTLR_ADVANCED_FEATURES
bool "Show advanced features"
help
Makes advanced features visible to controller developers.
menu "Advanced features"
visible if BT_CTLR_ADVANCED_FEATURES
config BT_CTLR_SW_DEFERRED_PRIVACY
bool "LE Controller-based Software Privacy"
depends on BT_CTLR_PRIVACY
help
Enable support for software based deferred privacy calculations.
config BT_CTLR_RPA_CACHE_SIZE
int "LE Controller-based Software Privacy Resolving List size"
depends on BT_CTLR_SW_DEFERRED_PRIVACY
default 8
range 1 64
help
Set the size of the Known Unknown Resolving List for LE
Controller-based Software deferred Privacy.
config BT_CTLR_DATA_LENGTH_CLEAR
bool "Data Length Support (Cleartext only)"
depends on SOC_SERIES_NRF51X
help
Enable support for Bluetooth v4.2 LE Data Length Update procedure, up to
251 byte cleartext payloads in the Controller. Encrypted connections
are not supported.
config BT_CTLR_PHY_2M_NRF
bool "2Mbps Nordic Semiconductor PHY Support (Cleartext only)"
depends on SOC_SERIES_NRF51X
select BT_CTLR_PHY_2M
help
Enable support for Nordic Semiconductor proprietary 2Mbps PHY in the
Controller. Encrypted connections are not supported.
config BT_CTLR_ADV_AUX_SET
int "LE Extended Advertising Auxiliary Sets"
depends on BT_BROADCASTER && BT_CTLR_ADV_EXT
range 1 BT_CTLR_ADV_SET if BT_CTLR_ADV_PERIODIC
range 0 BT_CTLR_ADV_SET
default 1 if BT_CTLR_ADV_PERIODIC
default BT_CTLR_ADV_SET
help
Maximum supported advertising auxiliary channel sets.
config BT_CTLR_ADV_SYNC_SET
int "LE Periodic Advertising Sets"
depends on BT_CTLR_ADV_PERIODIC
range 1 BT_CTLR_ADV_AUX_SET
default 1
help
Maximum supported periodic advertising sets.
config BT_CTLR_ADV_DATA_CHAIN
bool "Advertising Data chaining [EXPERIMENTAL]"
select EXPERIMENTAL
help
Enable support for Advertising Data chaining in Extended and
Periodic Advertising. This will allow to have Advertising Data Length
upto 1650 bytes.
This is experimental and work in progress, does not implement
recombining the AD Data and could return BT_HCI_ERR_PACKET_TOO_LONG
when a chain PDU needs its AD data overflow into a new chain PDU.
I.e. AD data in the last PDU could overflow due to the need to add
Aux Pointer field, and if this overflow bytes plus the next AD data
fragment length could be over 255 bytes needing additional chain PDU.
This is not implemented.
config BT_CTLR_ADV_PDU_LINK
# Enables extra space in each advertising PDU to allow linking PDUs.
# This is required to enable advertising data trains (i.e. transmission
# of AUX_CHAIN_IND).
bool
config BT_CTLR_ADV_AUX_PDU_LINK
# Enable chaining in Extended Advertising
bool
select BT_CTLR_ADV_PDU_LINK
config BT_CTLR_ADV_AUX_PDU_BACK2BACK
bool "Back-to-back transmission of extended advertising trains"
depends on BT_BROADCASTER && BT_CTLR_ADV_EXT
select BT_CTLR_ADV_AUX_PDU_LINK
default y if BT_CTLR_ADV_DATA_LEN_MAX > 191
help
Enables transmission of AUX_CHAIN_IND in extended advertising train by
sending each AUX_CHAIN_IND one after another back-to-back.
config BT_CTLR_ADV_AUX_PDU_BACK2BACK_AFS
int "AUX Frame Space for back-to-back transmission of extended advertising trains"
depends on BT_CTLR_ADV_AUX_PDU_BACK2BACK
range 300 1000
default 300
help
Specific AUX Frame Space to be used for back-to-back transmission of
extended advertising trains. Time specified in microseconds.
config BT_CTLR_ADV_SYNC_PDU_LINK
bool
depends on BT_CTLR_ADV_PERIODIC
select BT_CTLR_ADV_PDU_LINK
config BT_CTLR_ADV_SYNC_PDU_BACK2BACK
bool "Back-to-back transmission of periodic advertising trains"
depends on BT_CTLR_ADV_PERIODIC
select BT_CTLR_ADV_SYNC_PDU_LINK
help
Enables transmission of AUX_CHAIN_IND in periodic advertising train by
sending each AUX_CHAIN_IND one after another back-to-back.
Note, consecutive AUX_CHAIN_IND packets are not scheduled but sent at
a constant offset on a best effort basis. This means advertising train can
be preempted by other event at any time.
config BT_CTLR_ADV_SYNC_PDU_BACK2BACK_AFS
int "AUX Frame Space for back-to-back transmission of periodic advertising trains"
depends on BT_CTLR_ADV_SYNC_PDU_BACK2BACK
range 300 1000
default 300
help
Specific AUX Frame Space to be used for back-to-back transmission of
periodic advertising trains. Time specified in microseconds.
config BT_CTLR_ADV_RESERVE_MAX
bool "Use maximum Advertising PDU size time reservation"
depends on BT_BROADCASTER && BT_CTLR_ADV_EXT
default y
help
Use the maximum advertising PDU size time reservation considering the
Advertising Data could be updated from zero to maximum support size.
If maximum time reservation is disabled then time reservation
corresponding to the Advertising Data present at the time of the
start/enable of Advertising is used.
config BT_CTLR_ADV_DATA_BUF_MAX
int "Advertising Data Maximum Buffers"
depends on BT_BROADCASTER
range 1 64 if BT_CTLR_ADV_EXT
range 1 1 if !BT_CTLR_ADV_EXT
default 1
help
Maximum number of buffered Advertising Data payload across enabled
advertising sets.
config BT_CTLR_ADV_EXT_PDU_EXTRA_DATA_MEMORY
bool
depends on BT_CTLR_ADV_EXT
help
Add additional memory to advertising PDU storage. The memory is a
general purpose storage for data that should be send from ULL to LLL.
The data stored in the memory are in synchronization with content
of PDU memory.
For example, the extra data memory is used for storage for parameters
to configure Radio peripheral to transmit CTE. The configuration data
must be synchronized with CTEInfo field in extended advertising header
that is part of PDU data.
config BT_CTRL_ADV_ADI_IN_SCAN_RSP
bool "Include ADI in AUX_SCAN_RSP PDU"
depends on BT_BROADCASTER && BT_CTLR_ADV_EXT
help
Enable ADI field in AUX_SCAN_RSP PDU
config BT_CTLR_SCAN_AUX_SYNC_RESERVE_MIN
bool "Use minimal Scan Auxiliary and Periodic Sync PDU time reservation"
depends on (BT_OBSERVER && BT_CTLR_ADV_EXT) || BT_CTLR_SYNC_PERIODIC
default y
help
Use minimal time reservation for Auxiliary and Periodic Sync PDU
reception. A peer device could scheduling multiple advertising sets
in a short duration with small PDUs hence using the minimal time
reservation would avoid skipping closely scheduled reception of
multiple Auxiliary or Periodic Sync PDUs.
config BT_CTLR_SYNC_PERIODIC_SKIP_ON_SCAN_AUX
bool "Skip Periodic Sync event on overlap with Extended Scan Event"
depends on BT_CTLR_SYNC_PERIODIC
help
When AUX_ADV_IND or AUX_CHAIN_IND auxiliary channel PDU scan radio
event overlaps Periodic Sync radio event in unreserved time space,
let the Periodic Sync radio event be aborted so that the auxiliary
channel PDU can be received to generate Extended Advertising Reports.
By default we want Periodic Advertising Sync Events to take priority
over any overlapping Extended Advertising Primary and Auxiliary
channel PDU reception in order to not skip Periodic Advertising Report
generation.
But under simultaneous multiple Periodic Advertising Sync support with
small Periodic Advertising Intervals where there will be a lot of
overlapping Periodic Advertising Sync events, it is desirable to
permit Extended Advertising auxiliary PDU reception be allowed in a
round robin scheduling to skip the overlapping Periodic Advertising
Sync event. This permits new Periodic Advertising peers be discovered.
config BT_CTLR_SCAN_AUX_SET
int "LE Extended Scanning Auxiliary Sets"
depends on BT_OBSERVER && BT_CTLR_ADV_EXT
range 1 64
default 1
help
Maximum supported auxiliary channel scan sets.
config BT_CTLR_SCAN_SYNC_ISO_SET
int "LE ISO Broadcast Isochronous Groups Sync Sets"
depends on BT_CTLR_SYNC_ISO
range 1 64
default 1
help
Maximum supported broadcast isochronous groups (BIGs) sync sets.
config BT_CTLR_ADV_ENABLE_STRICT
bool "Enforce Strict Advertising Enable/Disable"
depends on BT_BROADCASTER
help
Enforce returning HCI Error Command Disallowed on enabling/disabling
already enabled/disabled advertising.
config BT_CTLR_SCAN_ENABLE_STRICT
bool "Enforce Strict Scan Enable/Disable"
depends on BT_OBSERVER
help
Enforce returning HCI Error Command Disallowed on enabling/disabling
already enabled/disabled scanning.
config BT_CTLR_ZLI
bool "Use Zero Latency IRQs"
depends on ZERO_LATENCY_IRQS
default y
help
Enable support for use of Zero Latency IRQ feature. Note, applications
shall not use Zero Latency IRQ themselves when this option is selected,
else will impact controller stability.
config BT_CTLR_OPTIMIZE_FOR_SPEED
prompt "Optimize for Speed" if !(SOC_SERIES_NRF51X && BT_CTLR_LE_ENC)
bool
default y if BT_CTLR_LE_ENC
help
Optimize compilation of controller for execution speed.
config BT_CTLR_XTAL_ADVANCED
bool "Advanced event preparation"
depends on BT_CTLR_XTAL_ADVANCED_SUPPORT
default y
help
Enables advanced event preparation offset ahead of radio tx/rx, taking
into account predictive processing time requirements in preparation to
the event, like control procedure handling and CPU execution speeds.
Crystal oscillator is retained between closely spaced consecutive
radio events to reduce the overall number of crystal settling current
consumptions.
This feature maximizes radio utilization in an average role event
timeslice when they are closely spaced by using a reduced offset
between preparation and radio event.
By disabling this feature, the controller will use a constant offset
between the preparation and radio event. The controller will toggle
crystal oscillator between two closely spaced radio events leading to
higher average current due to increased number of crystal settling
current consumptions.
config BT_CTLR_XTAL_THRESHOLD
int "Crystal shutdown threshold in uS"
depends on BT_CTLR_XTAL_ADVANCED
default 1500
help
Configure the optimal delta in micro seconds between two consecutive
radio events, event done to next preparation, below which (active
clock) crystal will be retained. This value is board dependent.
config BT_CTLR_SCHED_ADVANCED
bool "Advanced scheduling"
depends on BT_CTLR_SCHED_ADVANCED_SUPPORT && \
(BT_CONN || \
(BT_CTLR_ADV_EXT && (BT_CTLR_ADV_AUX_SET > 1)) || \
BT_CTLR_ADV_ISO)
default y if BT_CENTRAL || (BT_BROADCASTER && BT_CTLR_ADV_EXT) || BT_CTLR_ADV_ISO
help
Enable non-overlapping placement of observer, initiator and central
roles in timespace. Uses window offset in connection updates and uses
connection parameter request in peripheral role to negotiate
non-overlapping placement with active central roles to avoid peripheral
roles drifting into active central roles in the local controller.
This feature maximizes the average data transmission amongst active
concurrent central and peripheral connections while other observer,
initiator, central or peripheral roles are active in the local controller.
Disabling this feature will lead to overlapping role in timespace
leading to skipped events amongst active roles.
config BT_CTLR_CENTRAL_SPACING
int "Central Connection Spacing"
depends on BT_CTLR_SCHED_ADVANCED
default 0
range 0 65535
help
The preferred connection spacing between multiple simultaneous central
roles in microseconds. The Controller will calculate the required time
reservation using the data length and PHY currently in use. The
greater of the preferred spacing and the calculated time reservation
will be used.
The precision is determined by the resolution of the platform
dependent ticker clock.
The upper range is a ceil value permitting any tuning of Controller's
radio handling overheads and to allow Coded PHY S8 coding scheme PDU
time, i.e. radio event overheads + 17040 (PDU Tx) + 150 (tIFS) + 4
(active clock jitter) + 17040 (PDU rx) = (radio event overheads +
34234) microseconds.
config BT_CTLR_CENTRAL_RESERVE_MAX
bool "Use maximum data PDU size time reservation for Central"
depends on BT_CENTRAL
default y
help
Use the maximum data PDU size time reservation considering the Data
length could be updated from default 27 bytes to maximum support size.
If maximum time reservation is disabled then time reservation
corresponding to the default data length at the time of the
start/enable of Central role is used.
Note, currently this value is only used to space multiple central
connections and not for actual ticker time reservations.
config BT_CTLR_SLOT_RESERVATION_UPDATE
bool "Update event length reservation after PHY or DLE update"
depends on !BT_LL_SW_LLCP_LEGACY && (BT_CTLR_DATA_LENGTH || BT_CTLR_PHY)
default y
help
Updates the event length reservation after a completed Data Length Update
and/or PHY Update procedure to avoid overlap of radio events
config BT_CTLR_LLL_PRIO
int "Lower Link Layer (Radio) IRQ priority" if (BT_CTLR_ULL_LLL_PRIO_SUPPORT && !BT_CTLR_ZLI)
range 0 3 if SOC_SERIES_NRF51X
range 0 6 if (SOC_SERIES_NRF52X || SOC_SERIES_NRF53X)
default 0
help
The interrupt priority for event preparation and radio IRQ.
config BT_CTLR_ULL_HIGH_PRIO
int "Upper Link Layer High IRQ priority" if BT_CTLR_ULL_LLL_PRIO_SUPPORT
range BT_CTLR_LLL_PRIO 3 if SOC_SERIES_NRF51X
range BT_CTLR_LLL_PRIO 6 if (SOC_SERIES_NRF52X || SOC_SERIES_NRF53X)
default BT_CTLR_LLL_PRIO if (!BT_CTLR_ULL_LLL_PRIO_SUPPORT || BT_CTLR_ZLI || BT_CTLR_LOW_LAT)
default 1
help
The interrupt priority for Ticker's Worker IRQ and Upper Link Layer
higher priority functions.
config BT_CTLR_ULL_LOW_PRIO
int "Upper Link Layer Low IRQ priority" if BT_CTLR_ULL_LLL_PRIO_SUPPORT
range BT_CTLR_ULL_HIGH_PRIO 3 if SOC_SERIES_NRF51X
range BT_CTLR_ULL_HIGH_PRIO 6 if (SOC_SERIES_NRF52X || SOC_SERIES_NRF53X)
default BT_CTLR_ULL_HIGH_PRIO
help
The interrupt priority for Ticker's Job IRQ and Upper Link Layer
lower priority functions.
config BT_CTLR_LOW_LAT
bool "Low latency non-negotiating event preemption"
select BT_CTLR_LOW_LAT_ULL_DONE
default y if SOC_SERIES_NRF51X
help
Use low latency non-negotiating event preemption. This reduces
Radio ISR latencies by the controller event scheduling framework.
Consequently, this reduces on-air radio utilization due to redundant
radio state switches.
config BT_CTLR_LOW_LAT_ULL
prompt "Low latency ULL"
bool
depends on BT_CTLR_LOW_LAT
default y
help
Low latency ULL implementation that uses tailchaining instead of while
loop to demux rx messages from LLL.
config BT_CTLR_LOW_LAT_ULL_DONE
prompt "Low latency ULL prepare dequeue"
bool
help
Done events be processed and dequeued in ULL context.
config BT_CTLR_CONN_META
prompt "Connection meta data extension"
bool
help
Enables vendor specific per-connection meta data as part of the
LLL connection object.
config BT_CTLR_RX_PDU_META
prompt "RX pdu meta data"
bool
config BT_CTLR_RADIO_ENABLE_FAST
bool "Use tTXEN/RXEN,FAST ramp-up"
depends on SOC_COMPATIBLE_NRF52X || SOC_SERIES_NRF53X
default y
help
Enable use of fast radio ramp-up mode.
config BT_CTLR_TIFS_HW
bool "H/w Accelerated tIFS Trx switching"
depends on !BT_CTLR_RADIO_ENABLE_FAST && BT_CTLR_TIFS_HW_SUPPORT
default y
help
Enable use of hardware accelerated tIFS Trx switching.
config BT_CTLR_SW_SWITCH_SINGLE_TIMER
bool "Single TIMER tIFS Trx SW switching"
depends on (!BT_CTLR_TIFS_HW) && (SOC_COMPATIBLE_NRF52X || SOC_SERIES_NRF53X)
help
Implement the tIFS Trx SW switch with the same TIMER
instance, as the one used for BLE event timing. Requires
SW switching be enabled. Using a single TIMER:
(+) frees up one TIMER instance
(+) removes jitter for HCTO implementation
(-) introduces drifting to the absolute time inside BLE
events, that increases linearly with the number of
packets exchanged in the event
(-) makes it impossible to use most of the pre-programmed
PPI channels for the controller, resulting in 4 channels
less left for other uses
config BT_CTLR_PARAM_CHECK
bool "HCI Command Parameter checking"
default y if BT_HCI_RAW
help
Enable code checking HCI Command Parameters. This is not needed in
combined host plus controller builds, saving some code space.
if BT_CONN
config BT_CTLR_FAST_ENC
bool "Fast Encryption Setup"
depends on BT_CTLR_LE_ENC
default y if BT_HCI_RAW
help
Enable connection encryption setup in 4 connection events.
Peripheral will respond to Encryption Request with Encryption Response
in the next connection event, and will transmit Start Encryption
Request PDU in the same connection event, hence completing encryption
setup in 4 connection events. Encrypted data would be transmitted as
fast as in 4th connection event from Encryption Request.
config BT_CTLR_LLCP_CONN
int "Number of connections with worst-case overlapping procedures"
default BT_MAX_CONN
range 1 BT_MAX_CONN
help
Set the number connections for which worst-case buffer requirements
for LLCP procedures must be met. Executing LLCP procedures on
more than this number of connections simultaneously may cause
instabilities.
if !BT_LL_SW_LLCP_LEGACY
config BT_CTLR_LLCP_TX_PER_CONN_TX_CTRL_BUF_NUM_MAX
int
default 4
help
The theoretical maximum number of tx ctrl buffers needed for any connection, is 4.
two for active encryption procedure plus one for rejecting a remote request
and one for a local terminate
config BT_CTLR_LLCP_PER_CONN_TX_CTRL_BUF_NUM
int "Number of tx control buffers to be reserved per connection"
default BT_CTLR_LLCP_TX_PER_CONN_TX_CTRL_BUF_NUM_MAX
range 0 BT_CTLR_LLCP_TX_PER_CONN_TX_CTRL_BUF_NUM_MAX
help
Set the number control buffers that is to be pre allocated per connection
This defines the minimum number of buffers available for any connection
Setting this to non zero will ensure a connection will always have access
to buffer(s) for control procedure TX
config BT_CTLR_LLCP_COMMON_TX_CTRL_BUF_NUM
int "Number of tx control buffers to be available across all connections"
default 0
range 0 255
help
Set the number control buffers that is to be available for tx.
This defines the size of the pool of tx buffers available
for control procedure tx. This pool is shared across all
procedures/connections with allocation through a fifo queue.
Configure between 0 and (4 - BT_CTLR_LLCP_PER_CONN_TX_CTRL_BUF_NUM) * BT_CTLR_LLCP_CONN
config BT_CTLR_LLCP_LOCAL_PROC_CTX_BUF_NUM
int "Number of local control procedure contexts to be available across all connections"
default 6 if (BT_AUTO_PHY_UPDATE=y || BT_AUTO_DATA_LEN_UPDATE=y) && BT_CTLR_LLCP_CONN < 4
default 2 if BT_CTLR_LLCP_CONN = 1
default BT_CTLR_LLCP_CONN if BT_CTLR_LLCP_CONN > 1
range 2 255
help
Set the number control procedure contexts that is to be available.
This defines the size of the pool of control procedure contexts available
for handling local initiated control procedures.
This pool is shared across all connections, with allocation through a queue.
config BT_CTLR_LLCP_REMOTE_PROC_CTX_BUF_NUM
int "Number of remote control procedure contexts to be available across all connections"
default BT_CTLR_LLCP_CONN
range 1 255
help
Set the number control procedure contexts that is to be available.
This defines the size of the pool of control procedure contexts available
for handling remote initiated control procedures.
This pool is shared across all connections, with allocation through a queue.
endif #!BT_LL_SW_LLCP_LEGACY
config BT_CTLR_LLID_DATA_START_EMPTY
bool "Handle zero length L2CAP start frame"
default y if BT_HCI_RAW
help
Handle zero length L2CAP start frame.
config BT_CTLR_RX_ENQUEUE_HOLD
bool "Procedure Complete after on-air instant"
depends on BT_LL_SW_LLCP_LEGACY
default y if BT_HCI_RAW
help
Hold enqueue of Procedure Complete events with instant until after the
on-air instant is reached.
config BT_CTLR_TX_RETRY_DISABLE
bool "Disable Tx Retry"
help
Avoid retransmission of a PDU if peer device Nack-ed a transmission
in the current connection event, close the connection event so as to
save current consumption on retries (in case peer has no buffers to
receive new PDUs).
Enabling this will lower power consumption, but increase transmission
latencies by one connection interval as the next attempt to send a PDU
would happen in the next connection event instead of repeated retries
in the current connection event.
config BT_CTLR_THROUGHPUT
bool "Measure incoming Tx throughput"
help
Measure incoming Tx throughput and log the results.
config BT_CTLR_FORCE_MD_COUNT
int "Forced MD bit count" if !BT_CTLR_FORCE_MD_AUTO
depends on !BT_CTLR_LOW_LAT_ULL
range 0 255
default 1 if BT_CTLR_FORCE_MD_AUTO
default 0
help
No. of times to force MD bit to be set in Tx PDU after a successful
transmission of non-empty PDU.
This will prolong the connection event to from being closed in cases
where applications want to send data in same connection event but are
slow in providing new Tx data.
config BT_CTLR_FORCE_MD_AUTO
bool "Forced MD bit automatic calculation"
depends on !BT_CTLR_LOW_LAT_ULL
select BT_CTLR_THROUGHPUT
default y if BT_HCI_RAW
help
Force MD bit in transmitted PDU based on runtime incoming transmit
data throughput.
config BT_CTLR_CONN_RANDOM_FORCE
bool "Random forced scheduling for peripheral on missed anchor point"
depends on BT_PERIPHERAL
default y
help
When enabled, controller will have legacy behavior and randomly force
priority at next ticker scheduling for peripheral role, if anchor point is
missed.
Two or more connections with similar interval on a device connected
to a peer device having two or more connections at its end with same
interval could lock to a round robin pattern where in neither of the central
nor peripheral event would be in sync at either end. Randomness allows
to break this locked round robin pattern permitting an anchor point sync.
config BT_CTLR_CONN_RSSI_EVENT
bool "Connection RSSI event"
depends on BT_CTLR_CONN_RSSI
help
Generate events for connection RSSI measurement.
config BT_CTLR_ALLOW_SAME_PEER_CONN
bool "Allow connection requests from same peer"
depends on BT_MAX_CONN > 1
help
Allow connection requests from the same peer. While the
Bluetooth specification does not allow multiple connections
with the same peer, allowing such connections is useful
while debugging multiple connections.
WARNING: This option enables behavior that violates the Bluetooth
specification.
endif # BT_CONN
config BT_CTLR_ADV_INDICATION
bool "Advertisement indications"
depends on BT_BROADCASTER
help
Generate events indicating on air advertisement events.
config BT_CTLR_SCAN_REQ_NOTIFY
bool "Scan Request Notifications"
depends on BT_BROADCASTER
help
Generate events notifying the on air scan requests received.
config BT_CTLR_SCAN_REQ_RSSI
bool "Measure Scan Request RSSI"
depends on BT_CTLR_SCAN_REQ_NOTIFY
help
Measure RSSI of the on air scan requests received.
config BT_CTLR_SCAN_INDICATION
bool "Scanner indications"
depends on BT_OBSERVER
help
Generate events indicating on air scanner events.
config BT_CTLR_SCAN_UNRESERVED
bool "Unreserved scan window"
depends on BT_OBSERVER && !BT_CTLR_LOW_LAT
default y if BT_MESH
help
Scanner will not use time space reservation for scan window when in
continuous scan mode.
config BT_MAYFLY_YIELD_AFTER_CALL
bool "Yield from mayfly thread after first call"
default y
help
Only process one mayfly callback per invocation (legacy behavior).
If set to 'n', all pending mayflies for callee are executed before
yielding
config BT_TICKER_LOW_LAT
bool "Ticker low latency mode"
default y if SOC_SERIES_NRF51X
help
This option enables legacy ticker scheduling which defers overlapping
ticker node timeouts and thereby prevents ticker interrupts during
radio RX/TX. Enabling this option disables the ticker priority- and
'must expire' features.
config BT_TICKER_UPDATE
bool "Ticker Update"
help
This option enables Ticker Update interface.
config BT_TICKER_JOB_IDLE_GET
bool "Ticker Job Idle Get"
default y if BT_TICKER_LOW_LAT
help
This option enables the ticker interface to query the idle state of
the Ticker Job execution context. This interface is used to disable
Ticker Job execution once in idle state, no operations pending for the
Ticker Job to process.
config BT_TICKER_NEXT_SLOT_GET
bool "Ticker Next Slot Get"
default y if BT_CENTRAL
help
This option enables ticker interface to iterate through active
ticker nodes, returning tick to expire.
config BT_TICKER_REMAINDER_GET
bool "Ticker Next Slot Get with Remainder"
depends on BT_TICKER_NEXT_SLOT_GET
help
This option enables ticker interface to iterate through active
ticker nodes, returning tick to expire and remainder from a reference
tick.
config BT_TICKER_LAZY_GET
bool "Ticker Next Slot Get with Lazy"
depends on BT_TICKER_NEXT_SLOT_GET
help
This option enables ticker interface to iterate through active
ticker nodes, returning tick to expire and lazy count from a reference
tick.
config BT_TICKER_NEXT_SLOT_GET_MATCH
bool "Ticker Next Slot Get with match callback"
depends on BT_TICKER_NEXT_SLOT_GET
default y if BT_TICKER_SLOT_AGNOSTIC
help
This option enables ticker interface to iterate through active
ticker nodes with a callback for every found ticker node. When
returning true in the callback, iteration will stop and the normal
operation callback invoked.
config BT_TICKER_EXT
bool "Ticker extensions"
depends on !BT_TICKER_LOW_LAT && !BT_TICKER_SLOT_AGNOSTIC
default y if BT_BROADCASTER
help
This option enables ticker extensions such as re-scheduling of
ticker nodes with slot_window set to non-zero. Ticker extensions
are invoked by using available '_ext' versions of ticker interface
functions.
config BT_TICKER_EXT_SLOT_WINDOW_YIELD
bool "Tickers with slot window always yields"
depends on BT_TICKER_EXT
default y if BT_CTLR_ADV_ISO
help
This options forces tickers with slot window extensions to yield to
normal tickers and be placed at the end of their slot window.
config BT_TICKER_PRIORITY_SET
bool "Tickers with priority based collision resolution"
depends on BT_TICKER_EXT
help
This option provide tickers with persistent priority value that will
be used in resolving collisions.
The priority feature if enabled then a custom ULL is needed by vendors
to avoid repeated skipping of overlapping events as next_has_priority
check uses lazy value that would be always lazy_next > lazy_current as
currently skipped event becomes the next event with lazy value
incremented by 1. This repeated skip happens when all the time
between the event intervals are occupied continuously by overlapping
tickers.
config BT_TICKER_SLOT_AGNOSTIC
bool "Slot agnostic ticker mode"
help
This option enables slot agnostic ticker mode, which ignores slot
reservations and collision handling, and operates as a simple
multi-instance programmable timer.
config BT_CTLR_JIT_SCHEDULING
bool "Just-in-Time Scheduling"
select BT_TICKER_SLOT_AGNOSTIC
help
This option enables the experimental 'Next Generation' scheduling
feature, which eliminates priorities and collision resolving in the
ticker, and instead relies on just-in-time ("lazy") resolution in
the link layer.
config BT_CTLR_PERIPHERAL_ISO_EARLY_CIG_START
bool "Early start of peripheral CIG event"
depends on BT_CTLR_PERIPHERAL_ISO
help
Start scheduling the Peripheral ISO CIG events one event in advance
and hence adjust CIG offset and reference point ahead one interval.
config BT_CTLR_USER_EXT
prompt "Proprietary extensions in Controller"
bool
help
Catch-all for enabling proprietary event types in Controller behavior.
config BT_CTLR_USER_EVT_RANGE
int "Range of event constants reserved for proprietary event types"
depends on BT_CTLR_USER_EXT
default 5
range 0 10
help
Number of event types reserved for proprietary use. The range
is typically used when BT_CTLR_USER_EXT is in use.
config BT_CTLR_USER_TICKER_ID_RANGE
int "Range of ticker id constants reserved for proprietary ticker nodes"
depends on BT_CTLR_USER_EXT
default 0
range 0 10
help
Number of ticker ids reserved for proprietary use. The range
is typically used when BT_CTLR_USER_EXT is in use.
config BT_RX_USER_PDU_LEN
int "Maximum supported proprietary PDU buffer length"
depends on BT_CTLR_USER_EXT
default 2
range 2 255
help
Maximum data size for each proprietary PDU. This size includes link layer
header and payload. It does not account for HCI event headers as these
PDUs are assumed to not go across HCI.
config BT_CTLR_USER_CPR_INTERVAL_MIN
bool "Proprietary Connection Parameter Request minimum interval"
depends on BT_CTLR_USER_EXT
help
When enabled, controller will accept Connection Parameter Request
intervals down to a proprietary minimum value.
config BT_CTLR_USER_CPR_ANCHOR_POINT_MOVE
bool "Proprietary handling of anchor point movement"
depends on BT_CTLR_USER_EXT && BT_CTLR_CONN_PARAM_REQ && BT_PERIPHERAL
help
When enabled, defer accept/reject of Connection Parameter Request with only
anchor point movement to proprietary logic.
Only applicable for peripheral.
endmenu
comment "BLE Controller debug configuration"
config BT_CTLR_PROFILE_ISR
bool "Profile radio ISR"
help
Turn on measurement of radio ISR latency, CPU usage and generation of
controller event with these profiling data. The controller event
contains current, minimum and maximum ISR entry latencies; and
current, minimum and maximum ISR CPU use in micro-seconds.
config BT_CTLR_DEBUG_PINS
bool "Bluetooth Controller Debug Pins"
depends on BOARD_NRF51DK_NRF51422 || BOARD_NRF52DK_NRF52832 || BOARD_NRF52DK_NRF52810 || BOARD_NRF52840DK_NRF52840 || BOARD_NRF52833DK_NRF52833 || BOARD_NRF5340DK_NRF5340_CPUNET || BOARD_RV32M1_VEGA
help
Turn on debug GPIO toggling for the BLE Controller. This is useful
when debugging with a logic analyzer or profiling certain sections of
the code.
endif # BT_LL_SW_SPLIT