# Zephyr Bluetooth Controller configuration options # Copyright (c) 2020 Nordic Semiconductor ASA # SPDX-License-Identifier: Apache-2.0 config BT_CTLR_DF_SUPPORT bool depends on !BT_CTLR_TIFS_HW select BT_CTLR_DF_CTE_TX_SUPPORT select BT_CTLR_DF_ANT_SWITCH_2US_SUPPORT select BT_CTLR_DF_ANT_SWITCH_1US_SUPPORT select BT_CTLR_DF_CTE_RX_SUPPORT select BT_CTLR_DF_CTE_RX_SAMPLE_1US_SUPPORT config BT_CTLR_DF_CTE_TX_SUPPORT bool config BT_CTLR_DF_CTE_RX_SUPPORT bool config BT_CTLR_DF_CTE_RX_SAMPLE_1US_SUPPORT bool config BT_CTLR_DF_ANT_SWITCH_2US_SUPPORT bool config BT_CTLR_DF_ANT_SWITCH_1US_SUPPORT bool config BT_CTLR_CTEINLINE_SUPPORT bool menuconfig BT_CTLR_DF bool "LE Direction Finding [EXPERIMENTAL]" depends on BT_CTLR_DF_SUPPORT select EXPERIMENTAL help Enable support for Bluetooth 5.1 Direction Finding if BT_CTLR_DF # Basic controller functionalities required for implementation of # Bluetooth v5.1 Direction Finding config BT_CTLR_DF_CTE_TX bool "Transmission of Constant Tone Extension" depends on BT_CTLR_DF_CTE_TX_SUPPORT default y help Enable support for transmission of Constant Tone Extension in controller. config BT_CTLR_DF_CTE_RX_SAMPLE_1US bool "Reception of CTE with 1us sampling slots" depends on BT_CTLR_DF_CTE_RX_SAMPLE_1US_SUPPORT default y help Enable reception of Constant Tone Extension. Process IQ sampling during CTE reception with 1us sampling slots. This sampling mode is optional for Direction Finding according to Bluetooth v5.1. config BT_CTLR_DF_ANT_SWITCH_1US bool "Support for 1us antenna switch slots" depends on BT_CTLR_DF_ANT_SWITCH_1US_SUPPORT default y help Enable support for 1us antenna switching slots. This antenna switching mode is optional for Direction Finding according to Bluetooth v5.1. # Features related with Direction Finding # BT Core spec 5.1, Vol 6, Part B, sec. 4.6 Feature Support config BT_CTLR_DF_ANT_SWITCH_TX bool "Antenna switching during CTE transmission (AoD) feature" depends on BT_CTLR_DF_CTE_TX && BT_CTLR_DF_ANT_SWITCH_2US_SUPPORT default y help Enable support for antenna switching during CTE transmission. Also known as Angle of Departure mode. config BT_CTLR_DF_ANT_SWITCH_RX bool "Antenna switching during CTE reception (AoA) feature" depends on BT_CTLR_DF_CTE_RX && BT_CTLR_DF_ANT_SWITCH_2US_SUPPORT default y help Enable support for antenna switching during CTE reception. Also known as Angle of Arrival mode. config BT_CTLR_DF_CTE_RX bool "Reception of Constant Tone Extension feature" depends on BT_CTLR_DF_CTE_RX_SUPPORT select BT_CTLR_CONN_RSSI if BT_CONN default y help Enable support for reception of Constant Tone Extension in controller. config BT_CTLR_DF_CONN_CTE_REQ bool "Connection CTE Request feature" depends on BT_CTLR_DF_CONN_CTE_RX help Enable support for Bluetooth v5.1 Connection CTE Request feature in controller. config BT_CTLR_DF_CONN_CTE_RSP bool "Connection CTE Response feature" depends on BT_CTLR_DF_CONN_CTE_TX help Enable support for Bluetooth v5.1 Connection CTE Response feature in controller. config BT_CTLR_DF_ADV_CTE_TX bool "Connectionless CTE Transmitter feature" depends on BT_CTLR_DF_CTE_TX && BT_CTLR_ADV_PERIODIC select BT_CTLR_ADV_EXT_PDU_EXTRA_DATA_MEMORY default y help Enable support for Bluetooth v5.1 Connectionless CTE Transmitter feature in controller. config BT_CTLR_DF_SCAN_CTE_RX bool "Connectionless CTE Receiver" depends on BT_CTLR_DF_CTE_RX && BT_CTLR_SYNC_PERIODIC default y help Enable support for Bluetooth v5.1 connectionless CTE reception in controller. config BT_CTLR_DF_CONN_CTE_TX bool "Connection based CTE Transmitter" depends on BT_CTLR_DF_CTE_TX && BT_CONN default y help Enable transmission of Constant Tone Extension in direction finding connected mode. config BT_CTLR_DF_CONN_CTE_RX bool "Connection based CTE Receiver" depends on BT_CTLR_DF_CTE_RX && BT_CONN default y help Enable reception and sampling of Constant Tone Extension in direction finding connected mode. config BT_CTLR_DF_SAMPLE_CTE_FOR_PDU_WITH_BAD_CRC bool "Sampling of CTE for PDUs with bad CRC" depends on BT_CTLR_DF_SCAN_CTE_RX default y help Enable support for sampling of CTE for PDUs that have bad CRC. # Customization setting to manage memory usage footprint config BT_CTLR_DF_MAX_ANT_SW_PATTERN_LEN int "Maximum length of antenna switch pattern" range 3 39 if SOC_COMPATIBLE_NRF range 2 75 if !SOC_COMPATIBLE_NRF default 12 help Defines maximum length of antenna switch pattern that controller is able to store. For nRF5x-based controllers, the hardware imposes the value is within range 3 to 40, where last value is maximum. For general use cases Bluetooth Core 5.1 spec. required the value to be within range 2 up to 75. config BT_CTLR_DF_INIT_ANT_SEL_GPIOS bool "Initialization of GPIOs responsible for antenna switching" depends on BT_CTLR_DF_ANT_SWITCH_TX || BT_CTLR_DF_ANT_SWITCH_RX default y help Enable implicit initialization of GPIOs responsible for antenna switching during Radio initialization. If this feature is not enabled, the Radio initialization procedure will not initialize GPIOs pins selected to drive antenna switching. In such case application is responsible for appropriate GPIOs initialization. config BT_CTLR_DF_PER_ADV_CTE_NUM_MAX int "Maximum number of transmitted PDUs with Constant Tone Extension in connectionless mode" depends on BT_CTLR_DF_ADV_CTE_TX && BT_CTLR_ADV_PDU_LINK range 1 16 default 1 help Maximum supported number of PDUs, that have Constant Tone Extension, transmitted in single periodic advertising chain. The range is taken from BT Core spec 5.1, Vol 4 Part E section 7.8.82 HCI_LE_Set_Connectionless_IQ_Sampling_Enable Max_Sampled_CTEs parameter. config BT_CTLR_DF_PER_SCAN_CTE_NUM_MAX int "Maximum number of received PDUs with Constant Tone Extension in connectionless mode" depends on BT_CTLR_DF_SCAN_CTE_RX range 1 16 default 16 help Maximum supported number of PDUs, that have Constant Tone Extension, received in single periodic advertising chain. The range is taken from BT Core spec 5.1, Vol 4 Part E section 7.8.82 HCI_LE_Set_Connectionless_IQ_Sampling_Enable Max_Sampled_CTEs parameter. config BT_CTLR_DF_SWITCH_OFFSET int "Antenna switch offset relative to end of CRC" depends on SOC_COMPATIBLE_NRF range -2048 2047 default 0 help Offset of start of antenna switching after end of the CRC. It is a signed value in number of 16M cycles. Decreasing the offset value beyond the trigger of the AoA/AoD procedure will have no effect. config BT_CTLR_DF_SAMPLE_OFFSET_PHY_1M_SAMPLING_1US int "CTE sampling offset relative for PHY 1M and 1US samples spacing" depends on SOC_COMPATIBLE_NRF range -2048 2047 default 1 help Offset of sampling start from beginning of sampling slot. The value is a signed number of 16M cycles relative. It is used when PHY is set to PHY 1M and sampling slot duarion is 1 us. Decreasing the offset beyond the trigger of the AoA/AoD procedure will have no effect. config BT_CTLR_DF_SAMPLE_OFFSET_PHY_2M_SAMPLING_1US int "CTE sampling offset relative for PHY 1M and 1US samples spacing" depends on SOC_COMPATIBLE_NRF range -2048 2047 default 15 help Offset of sampling start from beginning of sampling slot. The value is a signed number of 16M cycles relative. It is used when PHY is set to PHY 1M and sampling slot duarion is 1 us. Decreasing the offset beyond the trigger of the AoA/AoD procedure will have no effect. config BT_CTLR_DF_SAMPLE_OFFSET_PHY_1M_SAMPLING_2US int "CTE sampling offset relative for PHY 1M and 2US samples spacing" depends on SOC_COMPATIBLE_NRF range -2048 2047 default 6 help Offset of sampling start from beginning of sampling slot. The value is a signed number of 16M cycles relative. It is used when PHY is set to PHY 1M and sampling slot duarion is 2 us. Decreasing the offset beyond the trigger of the AoA/AoD procedure will have no effect. config BT_CTLR_DF_SAMPLE_OFFSET_PHY_2M_SAMPLING_2US int "CTE sampling offset relative for PHY 1M and 2US samples spacing" depends on SOC_COMPATIBLE_NRF range -2048 2047 default 20 help Offset of sampling start from beginning of sampling slot. The value is a signed number of 16M cycles relative. It is used when PHY is set to PHY 1M and sampling slot duarion is 2 us. Decreasing the offset beyond the trigger of the AoA/AoD procedure will have no effect. config BT_CTLR_DF_DEBUG_ENABLE bool "Bluetooth Direction Finding debug support enable" help This option enables debug support for the Direction Finding implementation in controller. config BT_CTLR_DF_PHYEND_OFFSET_COMPENSATION_ENABLE bool depends on BT_CTLR_DF_CTE_RX && BT_CONN && (SOC_NRF52811 || SOC_NRF52820 || SOC_NRF52833 || SOC_NRF5340_CPUNET) default y help SOCs nRF52811, nRF52820, nRF52833, nRF5340 generate PHYEND event delayed when CTEINLINECTRLEN is enabled and received PDU does not have CTEInfo field. The option enables workaround for the delay to maintain inter frame spacing (IFS) for connection events. endif # BT_CTLR_DF