All the notable changes included in the nRF Connect SDK v2.1.0 release are documented in this section.
Support for the nRF21540 GPIO & SPI front-end module. SPI is used to set Tx gain of the nRF21540 in runtime. Support for this mode of operation for nRF21540 with Bluetooth LE is experimental.
Support for adding an optional external model used to split the requested transmit power into components. This is then used by
An experimental version of a built-in nRF21540 GPIO & SPI front-end module compensation model.
nrf_802154_fal_tx_power_get()function that is not used anymore by nRF 802.15.4 Radio Driver. (KRKNWK-14336)
mpsl_fem_tx_power_split()function so the
mpsl_tx_power_split_t.radio_tx_powerfield contains a value supported by the RADIO peripheral. Previously the value needed to be adjusted before applying to the RADIO peripheral. (KRKNWK-14323)
Added production support for the 1-wire coexistence interface on the Nordic nRF52 Series. (DRGN-16439)
mpsl_clock_hfclk_latency_set()which may be used to communicate the true high-frequency oscillator ramp-up time to MPSL. When not used, MPSL will make a worst-case assumption. (DRGN-13559)
mpsl_tx_power_radio_supported_power_adjust()which lets users adjust the TX power to a value supported by the radio peripheral. (KRKNWK-14770)
mpsl_fem_tx_power_split()so that the returned front-end module gain component is a structure containing the gain in dB and a front-end module implementation specific private setting. Changed
mpsl_fem_pa_gain_set()to accept this structure and apply the settings that it stores.
mpsl_fem_tx_power_split()to return the real achieved output power.
All the notable changes included in the nRF Connect SDK v2.0.0 release are documented in this section.
Support for changing PA gain during runtime through MODE pin switching for the nRF21540 GPIO front-end module.
Removed support for running MPSL on the nRF5340 PDK (DRGN-15174).
Timeslot API values
MPSL_TIMESLOT_EARLIEST_TIMEOUT_MAX_USincreased to 256 seconds (DRGN-16800).
Fixed an issue where
mpsl_uninit()would not disable the PPI channels used by MPSL (DRGN-16515).
Fixed an issue where
mpsl_init()would reject a certain clock configuration for no longer applicable legacy reasons (DRGN-16884).
Fixed an issue where MPSL could assert when radio notifications on ACTIVE (
MPSL_RADIO_NOTIFICATION_TYPE_INT_ON_BOTH) were used (DRGN-16642).
Fixed an issue where
mpsl_uninit()would hang indefinitely when the RC oscillator was used as the Low Frequency Clock source (DRGN-16515).
Fixed an issue where the High Frequency Clock would stay active if it was turned on between timing events. This could occur during Low Frequency Clock calibration when using the RC oscillator as the Low Frequency Clock source (DRGN-17014).
All the notable changes included in the nRF Connect SDK v1.9.0 release are documented in this section.
Added a new header file
mpsl_dppi_protocol_api.hwhich exposes DPPI channels that have a fixed configuration during the lifetime of a radio event (DRGN-16308). This will facilitate debugging of protocol implementations. Currently these channels are guaranteed to be applied correctly for Bluetooth only.
All the notable changes included in the nRF Connect SDK v1.8.0 release are documented in this section.
Added support for the Simple GPIO Front-End Module implementation on the nRF53 Series.
Added support and separate documentation for Bluetooth External Radio Coexistence on the nRF52 Series (DRGN-11849).
Added experimental support for the 1-wire coexistence interface on the nRF52 Series (DRGN-16439).
References to Bluetooth support were moved away from
projects/mpsl/doc/public/doc/cx.rst. Its scope is now limited to IEEE 802.15.4 External Radio Coexistence.
Fixed an issue where the current consumption in some cases was high after the end of a timeslot when using
MPSL_TIMESLOT_HFCLK_CFG_NO_GUARANTEE. Now the time from the request with type
MPSL_TIMESLOT_REQ_TYPE_EARLIESTuntil the event starts is in some cases increased (DRGN-16506).
All the notable changes included in the nRF Connect SDK v1.7.0 release are documented in this section.
Added support for nRF21540 GPIO Front-End Module for nRF53 Series.
Added a public interface for the radio coexistence protocol API (KRKNWK-7490). This public interface can be used to replace the example implementation of the radio coexistence with other implementations compliant with other Packet Traffic Arbitration (PTA) interfaces.
mpsl_fem_protocol_api.hwas moved from the
includedirectory to the
The start signal jitter for the timeslot API (
MPSL_TIMESLOT_START_JITTER_US) has been reduced to 1us. (DRGN-15842).
All the notable changes included in the nRF Connect SDK v1.6.0 release are documented in this section.
Added an API to set and get a flag that determines whether to apply the DEVICE-CONFIG-254. The API user shall set the flag to desired value with
mpsl_fem_device_config_254_shall_apply_set(). The protocol stacks’ responsibility is to check the flag value using
mpsl_fem_device_config_254_shall_apply_get()and apply the configuration when the flag value is true.
Added support for the nRF5340 device, which was previously only supported for evaluation purposes (DRGN-8639).
Added a function to the FEM protocol API to disable FEM when no radio activity is expected. This function is intended to reduce power consumption (KRKNWK-8842).
Reserved TIMER1 for use by MPSL on nRF5340 (DRGN-15721).
Fixed an issue where the clock configuration option
mpsl_clock_lfclk_cfg_t.skip_wait_lfclk_starteddid not work as expected with nRF5340 devices (DRGN-15223).
All the notable changes included in the nRF Connect SDK v1.5.0 release are documented in this section.
Added a new signal to the MPSL timeslot:
MPSL_TIMESLOT_SIGNAL_OVERSTAYED. This signal is given to the application when a timeslot session is closed too late (DRGN-14677).
Added a new clock configuration option
mpsl_clock_lfclk_cfg_t, which does not wait for the start of the low-frequency clock (DRGN-14204).
Added macro MPSL_RESERVED_PPI_CHANNELS for a bit mask of (D)PPI channels reserved by MPSL (DRGN-13356).
Fixed an issue where the low-frequency clock was configured incorrectly when the source configuration signal was set to either External Full swing or External Low swing (DRGN-15064).
Fixed an issue where MPSL waited for the low-frequency clock to start even though it was configured not to wait for it (DRGN-15176).
All the notable changes included in the nRF Connect SDK v1.4.0 release are documented in this section.
Changed the timeslot implementation to support up to 8 concurrent sessions (DRGN-13952). It is now necessary to supply a timeslot context configuration using
mpsl_timeslot_session_count_set(). All timeslot APIs now take a
session_idas input. The session id is retrieved from
Added an API to use Front-End Modules, like the nRF21540 GPIO or a simple GPIO, with the protocols and an API to configure them using the application. Only the nRF52 Series is supported.
Fixed an issue where both the high-frequency clock and
TIMER0were not turned off during idle periods shorter than 9 ms (DRGN-14152). This increased the average power consumption. Such a case could occur when running a Bluetooth LE connection with a connection interval of 7.5 ms.
See the Known issues page in nRF Connect SDK for the list of known issues and limitations for this release.
All the notable changes included in the nRF Connect SDK v1.3.0 release are documented in this section.
Added API for fetching build revision information.
Added API to set a TX Power envelope. Protocols using MPSL will limit their TX power to a value equal to, or lower than, the provided value.
Added support for using a low-swing and full-swing LF clock.
The support for integrating an 802.15.4 driver is now improved.
MPSL_RADIO_NOTIFICATION_DISTANCE_425USand replaced it by
On nRF53, the fix for Errata 16 is now applied.
The scheduling overhead of a timeslot event is reduced.
Fixed an issue on nRF53 where an assert could occur when using a timeslot.
All the notable changes included in the nRF Connect SDK v1.2.0 release are documented in this section.
Added a library version with preliminary support for the nRF5340 device. The feature set is the same as in the MPSL library for nRF52. The following library has been added:
_nrf52from the MPSL library file names.
Version numbers have been removed from the libraries.
It is no longer allowed to call
mpsl_init()if MPSL is already initialized.
Clock accuracy must be specified in parts per million (ppm).
Renamed the MPSL clock API for the high-frequency and low-frequency clocks.
Added the following MPSL library build variants: