how to achieve the ble shift between keyboard and different ble host in ncs sdk?

[pipixia_1_1]

hello 

dear nordic team,im use the nrf5284 develop a keyboard by nrf desktop sdk ,but i dont konw how to chang the ble status in ncs sdk .i hope my keyboard can connect different ble host at certain time，for example,my keyboard be connected by host A,and than i change the mac id in ble adv,it is connected by host B.even i want change the connect between host A and B by key press.for example now it is connected by host A,then i want it disconnect to host A,and connect to host B.but i dont kown how to operate.i see the ble_bond.c code，but i cant gusse the meaning of enum. 

[Edvin]

Hello,

In general, there are several approaches to do what you describe. One way is to use whitelisting (filter accept list), where you can add and remove devices from that list. If you only keep one device in the list at all times, only the device that is currently on the list will be able to connect.

Another way is, as you say, to change the nRF's identity. You can pretend to be a new device, so that only Device A or B will recognize it at the time. 

Since you are looking at the nrf_desktop sample application, I suggest you check out the documentation on the Bluetooth LE bond module used in this sample:

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/applications/nrf_desktop/doc/ble_bond.html

It looks like this sample is using the latter method. Setting up a separate identity for each connected peer. 

Did you test this module (By setting CONFIG_DESKTOP_BLE_PEER_SELECT=y in prj.conf)? Were you able to switch between different peers?

Best regards,

Edvin

[pipixia_1_1]

thanks for your reply,i ctry to test the ble_bond.c .i modify the kconfig in the nrRF Konfig GUI with ACTION in vs code .

and than save it to prj_keyboard.conf

and than build it ,but it report erro:

[Edvin]

Hello,

Can you please copy/save the entire build log and upload it here?

And what did prj_keyboard.conf look like before, and after you saved your changes?

Best regards,

Edvin

[pipixia_1_1]

mybe the methond of save(minimal) is not right,i change my oprateion.as fllow steps：

1.create a  application by copy nrf_desktop project,and build it ,work well.

2.change the kconfig by nrRF Konfig GUI  ,and save it to file prj_keyboard.conf

3.build it ,report erro.

the prj_keyboard.conf before modify kconfig like this 

4111.prj_keyboard.conf

the prj_keyboard.conf after modify kconfig like this 

4111.prj_keyboard.conf

and the buld log is so big that i cant upload it .i paste it as fllow,and you can aslo repeat  the operation in your vs code,i believe it will occur.

* Executing task: nRF Connect: Build [pristine]: nrf_desktop_1/build (active)

Building nrf_desktop_1
C:\windows\system32\cmd.exe /d /s /c "west build --build-dir d:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build d:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1 --pristine --board nrf52840dk_nrf52840 --no-sysbuild -- -DNCS_TOOLCHAIN_VERSION=NONE -DCONFIG_CORTEX_M_DEBUG_MONITOR_HOOK=y -DCONFIG_DEBUG_OPTIMIZATIONS=y -DCONFIG_DEBUG_THREAD_INFO=y -DCONFIG_SEGGER_DEBUGMON=y -Db0_CONF_FILE=D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/configuration/nrf52840dk_nrf52840/child_image/b0/prj_keyboard.conf -Db0_OVERLAY_CONFIG=D:/NCS/V2.6/v2.6.0/nrf/subsys/partition_manager/partition_manager_enabled.conf -Ds1_image_OVERLAY_CONFIG=D:/NCS/V2.6/v2.6.0/nrf/subsys/partition_manager/partition_manager_enabled.conf -DCACHED_CONF_FILE=d:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/configuration/nrf52840dk_nrf52840/prj_keyboard.conf -DDTC_OVERLAY_FILE=d:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/configuration/nrf52840dk_nrf52840/app.overlay"

-- west build: generating a build system
Loading Zephyr default modules (Zephyr base).
-- Application: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1
-- CMake version: 3.21.0
-- Found Python3: D:/NCS/V2.6/toolchains/cf2149caf2/opt/bin/python.exe (found suitable version "3.9.13", minimum required is "3.8") found components: Interpreter
-- Cache files will be written to: D:/NCS/V2.6/v2.6.0/zephyr/.cache
-- Zephyr version: 3.5.99 (D:/NCS/V2.6/v2.6.0/zephyr)
-- Found west (found suitable version "1.2.0", minimum required is "0.14.0")
-- Board: nrf52840dk_nrf52840
-- Found host-tools: zephyr 0.16.5 (D:/NCS/V2.6/toolchains/cf2149caf2/opt/zephyr-sdk)
-- Found toolchain: zephyr 0.16.5 (D:/NCS/V2.6/toolchains/cf2149caf2/opt/zephyr-sdk)
-- Found Dtc: D:/NCS/V2.6/toolchains/cf2149caf2/opt/bin/dtc.exe (found suitable version "1.4.7", minimum required is "1.4.6")
-- Found BOARD.dts: D:/NCS/V2.6/v2.6.0/zephyr/boards/arm/nrf52840dk_nrf52840/nrf52840dk_nrf52840.dts
-- Found devicetree overlay: d:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/configuration/nrf52840dk_nrf52840/app.overlay
-- Generated zephyr.dts: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/zephyr/zephyr.dts
-- Generated devicetree_generated.h: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/zephyr/include/generated/devicetree_generated.h
-- Including generated dts.cmake file: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/zephyr/dts.cmake
Parsing D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/Kconfig
Loaded configuration 'D:/NCS/V2.6/v2.6.0/zephyr/boards/arm/nrf52840dk_nrf52840/nrf52840dk_nrf52840_defconfig'
Merged configuration 'd:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/configuration/nrf52840dk_nrf52840/prj_keyboard.conf'
Merged configuration 'D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/zephyr/misc/generated/extra_kconfig_options.conf'
Configuration saved to 'D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/zephyr/.config'
Kconfig header saved to 'D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/zephyr/include/generated/autoconf.h'
-- Found GnuLd: d:/ncs/v2.6/toolchains/cf2149caf2/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd.exe (found version "2.38")
-- The C compiler identification is GNU 12.2.0
-- The CXX compiler identification is GNU 12.2.0
-- The ASM compiler identification is GNU
-- Found assembler: D:/NCS/V2.6/toolchains/cf2149caf2/opt/zephyr-sdk/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc.exe

=== child image b0 - begin ===
loading initial cache file D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/b0/child_image_preload.cmake
Loading Zephyr default modules (Zephyr base).
-- Application: D:/NCS/V2.6/v2.6.0/nrf/samples/bootloader
-- CMake version: 3.21.0
-- Found Python3: D:/NCS/V2.6/toolchains/cf2149caf2/opt/bin/python.exe (found suitable version "3.9.13", minimum required is "3.8") found components: Interpreter
-- Cache files will be written to: D:/NCS/V2.6/v2.6.0/zephyr/.cache
-- Zephyr version: 3.5.99 (D:/NCS/V2.6/v2.6.0/zephyr)
-- Found west (found suitable version "1.2.0", minimum required is "0.14.0")
-- Board: nrf52840dk_nrf52840
-- Found host-tools: zephyr 0.16.5 (D:/NCS/V2.6/toolchains/cf2149caf2/opt/zephyr-sdk)
-- Found toolchain: zephyr 0.16.5 (D:/NCS/V2.6/toolchains/cf2149caf2/opt/zephyr-sdk)
-- Found Dtc: D:/NCS/V2.6/toolchains/cf2149caf2/opt/bin/dtc.exe (found suitable version "1.4.7", minimum required is "1.4.6")
-- Found BOARD.dts: D:/NCS/V2.6/v2.6.0/zephyr/boards/arm/nrf52840dk_nrf52840/nrf52840dk_nrf52840.dts
-- Generated zephyr.dts: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/b0/zephyr/zephyr.dts
-- Generated devicetree_generated.h: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/b0/zephyr/include/generated/devicetree_generated.h
-- Including generated dts.cmake file: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/b0/zephyr/dts.cmake

warning: HW_STACK_PROTECTION (defined at arch/Kconfig:259) was assigned the value 'y' but got the
value 'n'. Check these unsatisfied dependencies: ARCH_HAS_STACK_PROTECTION (=n). See
docs.zephyrproject.org/.../kconfig.html and/or look up
HW_STACK_PROTECTION in the menuconfig/guiconfig interface. The Application Development Primer,
Setting Configuration Values, and Kconfig - Tips and Best Practices sections of the manual might be
helpful too.

Parsing D:/NCS/V2.6/v2.6.0/zephyr/Kconfig
Loaded configuration 'D:/NCS/V2.6/v2.6.0/zephyr/boards/arm/nrf52840dk_nrf52840/nrf52840dk_nrf52840_defconfig'
Merged configuration 'D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/configuration/nrf52840dk_nrf52840/child_image/b0/prj_keyboard.conf'
Merged configuration 'D:/NCS/V2.6/v2.6.0/nrf/subsys/partition_manager/partition_manager_enabled.conf'
Configuration saved to 'D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/b0/zephyr/.config'
Kconfig header saved to 'D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/b0/zephyr/include/generated/autoconf.h'
-- Found GnuLd: d:/ncs/v2.6/toolchains/cf2149caf2/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd.exe (found version "2.38")
-- The C compiler identification is GNU 12.2.0
-- The CXX compiler identification is GNU 12.2.0
-- The ASM compiler identification is GNU
-- Found assembler: D:/NCS/V2.6/toolchains/cf2149caf2/opt/zephyr-sdk/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc.exe
CMake Warning at D:/NCS/V2.6/v2.6.0/nrf/lib/flash_patch/CMakeLists.txt:8 (message):

----------------------------------------------------------
--- WARNING: To maintain the integrity of secure boot, ---
--- enable CONFIG_DISABLE_FLASH_PATCH in production. ---
----------------------------------------------------------

-- Configuring done
-- Generating done
-- Build files have been written to: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/b0
=== child image b0 - end ===

=== child image s1_image - begin ===
loading initial cache file D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/image_preload.cmake
Loading Zephyr default modules (Zephyr base).
-- Application: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1
-- CMake version: 3.21.0
-- Found Python3: D:/NCS/V2.6/toolchains/cf2149caf2/opt/bin/python.exe (found suitable version "3.9.13", minimum required is "3.8") found components: Interpreter
-- Cache files will be written to: D:/NCS/V2.6/v2.6.0/zephyr/.cache
-- Zephyr version: 3.5.99 (D:/NCS/V2.6/v2.6.0/zephyr)
-- Found west (found suitable version "1.2.0", minimum required is "0.14.0")
-- Board: nrf52840dk_nrf52840
-- Found host-tools: zephyr 0.16.5 (D:/NCS/V2.6/toolchains/cf2149caf2/opt/zephyr-sdk)
-- Found toolchain: zephyr 0.16.5 (D:/NCS/V2.6/toolchains/cf2149caf2/opt/zephyr-sdk)
-- Found Dtc: D:/NCS/V2.6/toolchains/cf2149caf2/opt/bin/dtc.exe (found suitable version "1.4.7", minimum required is "1.4.6")
-- Found BOARD.dts: D:/NCS/V2.6/v2.6.0/zephyr/boards/arm/nrf52840dk_nrf52840/nrf52840dk_nrf52840.dts
-- Found devicetree overlay: d:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/configuration/nrf52840dk_nrf52840/app.overlay
-- Generated zephyr.dts: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/s1_image/zephyr/zephyr.dts
-- Generated devicetree_generated.h: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/s1_image/zephyr/include/generated/devicetree_generated.h
-- Including generated dts.cmake file: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/s1_image/zephyr/dts.cmake
-- Found GnuLd: d:/ncs/v2.6/toolchains/cf2149caf2/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd.exe (found version "2.38")
-- The C compiler identification is GNU 12.2.0
-- The CXX compiler identification is GNU 12.2.0
-- The ASM compiler identification is GNU
-- Found assembler: D:/NCS/V2.6/toolchains/cf2149caf2/opt/zephyr-sdk/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc.exe
CMake Warning at D:/NCS/V2.6/v2.6.0/zephyr/CMakeLists.txt:862 (message):
No SOURCES given to Zephyr library: drivers__console

Excluding target from build.

CMake Warning at D:/NCS/V2.6/v2.6.0/zephyr/CMakeLists.txt:1957 (message):
__ASSERT() statements are globally ENABLED

-- Found partition manager static configuration: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/configuration/nrf52840dk_nrf52840/pm_static.yml
-- Configuring done
-- Generating done
-- Build files have been written to: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/s1_image
=== child image s1_image - end ===

CMake Warning at D:/NCS/V2.6/v2.6.0/zephyr/CMakeLists.txt:862 (message):
No SOURCES given to Zephyr library: drivers__console

Excluding target from build.

CMake Warning at D:/NCS/V2.6/v2.6.0/zephyr/CMakeLists.txt:1957 (message):
__ASSERT() statements are globally ENABLED

-- Found partition manager static configuration: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/configuration/nrf52840dk_nrf52840/pm_static.yml
Partition 'b0_container' is not included in the dynamic resolving since it is statically defined.
Partition 'b0' is not included in the dynamic resolving since it is statically defined.
Partition 'provision' is not included in the dynamic resolving since it is statically defined.
Partition 's0' is not included in the dynamic resolving since it is statically defined.
Partition 's0_image' is not included in the dynamic resolving since it is statically defined.
Partition 's1' is not included in the dynamic resolving since it is statically defined.
Partition 's1_image' is not included in the dynamic resolving since it is statically defined.
Partition 'settings_storage' is not included in the dynamic resolving since it is statically defined.
Dropping partition 's1_pad' since its size is 0.
Dropping partition 's0_pad' since its size is 0.
-- Configuring done
-- Generating done
-- Build files have been written to: D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build
-- west build: building application
[6/351] Generating include/generated/version.h
-- Zephyr version: 3.5.99 (D:/NCS/V2.6/v2.6.0/zephyr), build: v3.5.99-ncs1
[2/134] Generating include/generated/version.h
-- Zephyr version: 3.5.99 (D:/NCS/V2.6/v2.6.0/zephyr), build: v3.5.99-ncs1
[134/134] Linking C executable zephyr\zephyr.elf
Memory region Used Size Region Size %age Used
FLASH: 12612 B 20 KB 61.58%
RAM: 38288 B 256 KB 14.61%
IDT_LIST: 0 GB 32 KB 0.00%
[106/351] Building C object zephyr/CMakeFiles/zephyr.dir/misc/generated/configs.c.obj
FAILED: zephyr/CMakeFiles/zephyr.dir/misc/generated/configs.c.obj
D:\NCS\V2.6\toolchains\cf2149caf2\opt\zephyr-sdk\arm-zephyr-eabi\bin\arm-zephyr-eabi-gcc.exe -DEXT_API_MAGIC=0x281ee6de,0xb845acea,13314 -DFIRMWARE_INFO_MAGIC=0x281ee6de,0x8fcebb4c,13314 -DKERNEL -DNRF52840_XXAA -DUSE_PARTITION_MANAGER=1 -DVALIDATION_INFO_MAGIC=0x281ee6de,0x86518483,78850 -DVALIDATION_POINTER_MAGIC=0x281ee6de,0x6919b47e,78850 -D__PROGRAM_START -D__ZEPHYR__=1 -ID:/NCS/V2.6/v2.6.0/zephyr/kernel/include -ID:/NCS/V2.6/v2.6.0/zephyr/arch/arm/include -ID:/NCS/V2.6/v2.6.0/nrf/drivers/mpsl/clock_control -ID:/NCS/V2.6/v2.6.0/zephyr/include -ID:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/zephyr/include/generated -ID:/NCS/V2.6/v2.6.0/zephyr/soc/arm/nordic_nrf/nrf52 -ID:/NCS/V2.6/v2.6.0/zephyr/soc/common/nordic_nrf/. -ID:/NCS/V2.6/v2.6.0/zephyr/soc/arm/nordic_nrf/common/. -ID:/NCS/V2.6/v2.6.0/zephyr/subsys/usb/device -ID:/NCS/V2.6/v2.6.0/zephyr/subsys/bluetooth -ID:/NCS/V2.6/v2.6.0/zephyr/subsys/settings/include -ID:/NCS/V2.6/v2.6.0/zephyr/drivers/usb/common/nrf_usbd_common/. -ID:/NCS/V2.6/v2.6.0/nrf/include -ID:/NCS/V2.6/v2.6.0/nrf/lib/multithreading_lock/. -ID:/NCS/V2.6/v2.6.0/nrf/subsys/bluetooth/controller/. -ID:/NCS/V2.6/v2.6.0/nrf/subsys/app_event_manager/. -ID:/NCS/V2.6/v2.6.0/nrf/subsys/app_event_manager_profiler_tracer/. -ID:/NCS/V2.6/v2.6.0/zephyr/drivers/flash -ID:/NCS/V2.6/v2.6.0/nrf/tests/include -ID:/NCS/V2.6/v2.6.0/modules/hal/cmsis/CMSIS/Core/Include -ID:/NCS/V2.6/v2.6.0/zephyr/modules/cmsis/. -ID:/NCS/V2.6/v2.6.0/modules/hal/nordic/nrfx -ID:/NCS/V2.6/v2.6.0/modules/hal/nordic/nrfx/drivers/include -ID:/NCS/V2.6/v2.6.0/modules/hal/nordic/nrfx/mdk -ID:/NCS/V2.6/v2.6.0/zephyr/modules/hal_nordic/nrfx/. -ID:/NCS/V2.6/v2.6.0/modules/debug/segger/SEGGER -ID:/NCS/V2.6/v2.6.0/modules/debug/segger/Config -ID:/NCS/V2.6/v2.6.0/modules/debug/segger/SEGGER/DebugMon/include -ID:/NCS/V2.6/v2.6.0/modules/crypto/tinycrypt/lib/include -ID:/NCS/V2.6/v2.6.0/nrfxlib/mpsl/fem/common/include -ID:/NCS/V2.6/v2.6.0/nrfxlib/mpsl/fem/nrf21540_gpio/include -ID:/NCS/V2.6/v2.6.0/nrfxlib/mpsl/fem/nrf21540_gpio_spi/include -ID:/NCS/V2.6/v2.6.0/nrfxlib/mpsl/fem/simple_gpio/include -ID:/NCS/V2.6/v2.6.0/nrfxlib/mpsl/fem/include -ID:/NCS/V2.6/v2.6.0/nrfxlib/mpsl/fem/include/protocol -ID:/NCS/V2.6/v2.6.0/nrfxlib/mpsl/include -ID:/NCS/V2.6/v2.6.0/nrfxlib/mpsl/include/protocol -ID:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/configuration/common -ID:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/configuration/nrf52840dk_nrf52840 -ID:/NCS/V2.6/v2.6.0/nrfxlib/softdevice_controller/include -isystem D:/NCS/V2.6/v2.6.0/zephyr/lib/libc/minimal/include -isystem D:/NCS/V2.6/v2.6.0/zephyr/lib/libc/common/include -isystem d:/ncs/v2.6/toolchains/cf2149caf2/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/include -isystem d:/ncs/v2.6/toolchains/cf2149caf2/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/include-fixed -isystem D:/NCS/V2.6/v2.6.0/nrfxlib/crypto/nrf_cc310_platform/include -fno-strict-aliasing -Og -imacros D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/zephyr/include/generated/autoconf.h -ffreestanding -fno-common -g -gdwarf-4 -fdiagnostics-color=always -mcpu=cortex-m4 -mthumb -mabi=aapcs -mfp16-format=ieee --sysroot=D:/NCS/V2.6/toolchains/cf2149caf2/opt/zephyr-sdk/arm-zephyr-eabi/arm-zephyr-eabi -imacros D:/NCS/V2.6/v2.6.0/zephyr/include/zephyr/toolchain/zephyr_stdint.h -Wall -Wformat -Wformat-security -Wno-format-zero-length -Wno-pointer-sign -Wpointer-arith -Wexpansion-to-defined -Wno-unused-but-set-variable -Werror=implicit-int -fno-pic -fno-pie -fno-asynchronous-unwind-tables -fno-reorder-functions --param=min-pagesize=0 -fno-defer-pop -fmacro-prefix-map=D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1=CMAKE_SOURCE_DIR -fmacro-prefix-map=D:/NCS/V2.6/v2.6.0/zephyr=ZEPHYR_BASE -fmacro-prefix-map=D:/NCS/V2.6/v2.6.0=WEST_TOPDIR -ffunction-sections -fdata-sections -std=c99 -nostdinc -MD -MT zephyr/CMakeFiles/zephyr.dir/misc/generated/configs.c.obj -MF zephyr\CMakeFiles\zephyr.dir\misc\generated\configs.c.obj.d -o zephyr/CMakeFiles/zephyr.dir/misc/generated/configs.c.obj -c D:/NCS/V2.6/v2.6.0/nrf/applications/nrf_desktop_1/build/zephyr/misc/generated/configs.c
C:\Users\ADMINI~1\AppData\Local\Temp\ccXk5IcT.s: Assembler messages:

C:\Users\ADMINI~1\AppData\Local\Temp\ccXk5IcT.s:745: Error: missing expression

[118/351] Building C object zephyr/subsys/bluetooth/host/CMakeFiles/subsys__bluetooth__host.dir/hci_core.c.obj
ninja: build stopped: subcommand failed.
FATAL ERROR: command exited with status 1: 'D:\NCS\V2.6\toolchains\cf2149caf2\opt\bin\cmake.EXE' --build 'd:\NCS\V2.6\v2.6.0\nrf\applications\nrf_desktop_1\build'

* The terminal process terminated with exit code: 1.
* Terminal will be reused by tasks, press any key to close it.

[pipixia_1_1]

I have discovered a phenomenon that the config has been modifed when i open the  nrf Kconfig GUI with do nothing.i dont konw why it will be modifed,because i have do nothing .

[pipixia_1_1]

if now i click the button "Save to file" then build it ,it will report erro.

[Edvin]

Hi. If you take a couple of steps back, and add this to your build configuration:

Does that help?

[Edvin]

To be clear, select "Use build system default" under the "Configuration" tab, and add the prj_keyboard.conf using the -DEXTRA_CONF_FILE option. Remember to click OK before you click build. 

[pipixia_1_1]

i build it fllow your instruction,and build ok .but i want test the funcation of  peer select and erase .if modify the config by Kconfig GUI ,it also report erro.

you can test in your sdkl