Setting system to internal RC oscillator

[Sachin]

Hi,

 I am using nRF connect SDK  V2.0.2 chipset 52832 built using VS code.

 Need to move the setup from an external clock to an internal RC oscillator.

 When I disable "Hardware Clock Controller Support" in KConfig I get errors. Not able to select any option in the "32Khz" clock source. Image attached. Please suggest how to enable the internal oscillator 

[Susheel Nuguru]

32KHz clock source have direct dependency on CLOCK_CONTROL that you are trying to disable.

32KHz clock source
No description available.
Direct Dependencies: (=y)
CLOCK_CONTROL_NRF (=y)
&& CLOCK_CONTROL (=y)

You need to enable CLOCK_CONTROL and CLOCK_CONTROL_NRF  to have this option available, else they are greyed out.

[Sachin]

Hi Susheel,

     I am not able to find these options under KConfig. Copying the KConfig file from the build. Can you please let me know which option I should change?

menu "nrf (C:/Users/Sachin/ncs/v2.0.2/nrf)"
osource "C:/Users/Sachin/ncs/v2.0.2/nrf/Kconfig.nrf"
config ZEPHYR_NRF_MODULE
	bool
	default y
endmenu
menu "mcuboot (C:/Users/Sachin/ncs/v2.0.2/bootloader/mcuboot)"
osource "$(ZEPHYR_MCUBOOT_KCONFIG)"
config ZEPHYR_MCUBOOT_MODULE
	bool
	default y
endmenu
menu "mbedtls (C:/Users/Sachin/ncs/v2.0.2/modules/crypto/mbedtls)"
osource "$(ZEPHYR_MBEDTLS_KCONFIG)"
config ZEPHYR_MBEDTLS_MODULE
	bool
	default y
endmenu
menu "trusted-firmware-m (C:/Users/Sachin/ncs/v2.0.2/modules/tee/tf-m/trusted-firmware-m)"
osource "$(ZEPHYR_TRUSTED_FIRMWARE_M_KCONFIG)"
config ZEPHYR_TRUSTED_FIRMWARE_M_MODULE
	bool
	default y
endmenu
menu "cjson (C:/Users/Sachin/ncs/v2.0.2/modules/lib/cjson)"
osource "$(ZEPHYR_CJSON_KCONFIG)"
config ZEPHYR_CJSON_MODULE
	bool
	default y
endmenu
menu "zcbor (C:/Users/Sachin/ncs/v2.0.2/modules/lib/zcbor)"
osource "$(ZEPHYR_ZCBOR_KCONFIG)"
config ZEPHYR_ZCBOR_MODULE
	bool
	default y
endmenu
menu "memfault-firmware-sdk (C:/Users/Sachin/ncs/v2.0.2/modules/lib/memfault-firmware-sdk)"
osource "C:/Users/Sachin/ncs/v2.0.2/modules/lib/memfault-firmware-sdk/ports/zephyr/Kconfig"
config ZEPHYR_MEMFAULT_FIRMWARE_SDK_MODULE
	bool
	default y
endmenu
menu "canopennode (C:/Users/Sachin/ncs/v2.0.2/modules/lib/canopennode)"
osource "$(ZEPHYR_CANOPENNODE_KCONFIG)"
config ZEPHYR_CANOPENNODE_MODULE
	bool
	default y
endmenu
menu "chre (C:/Users/Sachin/ncs/v2.0.2/modules/lib/chre)"
osource "C:/Users/Sachin/ncs/v2.0.2/modules/lib/chre/platform/zephyr/Kconfig"
config ZEPHYR_CHRE_MODULE
	bool
	default y
endmenu
menu "hal_nordic (C:/Users/Sachin/ncs/v2.0.2/modules/hal/nordic)"
osource "$(ZEPHYR_HAL_NORDIC_KCONFIG)"
config ZEPHYR_HAL_NORDIC_MODULE
	bool
	default y
endmenu
menu "liblc3codec (C:/Users/Sachin/ncs/v2.0.2/modules/lib/liblc3codec)"
osource "$(ZEPHYR_LIBLC3CODEC_KCONFIG)"
config ZEPHYR_LIBLC3CODEC_MODULE
	bool
	default y
endmenu
menu "littlefs (C:/Users/Sachin/ncs/v2.0.2/modules/fs/littlefs)"
osource "$(ZEPHYR_LITTLEFS_KCONFIG)"
config ZEPHYR_LITTLEFS_MODULE
	bool
	default y
endmenu
menu "loramac-node (C:/Users/Sachin/ncs/v2.0.2/modules/lib/loramac-node)"
osource "$(ZEPHYR_LORAMAC_NODE_KCONFIG)"
config ZEPHYR_LORAMAC_NODE_MODULE
	bool
	default y
endmenu
menu "lvgl (C:/Users/Sachin/ncs/v2.0.2/modules/lib/gui/lvgl)"
osource "C:/Users/Sachin/ncs/v2.0.2/modules/lib/gui/lvgl/zephyr/Kconfig"
config ZEPHYR_LVGL_MODULE
	bool
	default y
endmenu
menu "lz4 (C:/Users/Sachin/ncs/v2.0.2/modules/lib/lz4)"
osource "$(ZEPHYR_LZ4_KCONFIG)"
config ZEPHYR_LZ4_MODULE
	bool
	default y
endmenu
menu "nanopb (C:/Users/Sachin/ncs/v2.0.2/modules/lib/nanopb)"
osource "$(ZEPHYR_NANOPB_KCONFIG)"
config ZEPHYR_NANOPB_MODULE
	bool
	default y
endmenu
menu "TraceRecorder (C:/Users/Sachin/ncs/v2.0.2/modules/debug/TraceRecorder)"
osource "C:/Users/Sachin/ncs/v2.0.2/modules/debug/TraceRecorder/kernelports/Zephyr/Kconfig"
config ZEPHYR_TRACERECORDER_MODULE
	bool
	default y
endmenu
menu "zscilib (C:/Users/Sachin/ncs/v2.0.2/modules/lib/zscilib)"
osource "C:/Users/Sachin/ncs/v2.0.2/modules/lib/zscilib/Kconfig.zscilib"
config ZEPHYR_ZSCILIB_MODULE
	bool
	default y
endmenu
menu "nrfxlib (C:/Users/Sachin/ncs/v2.0.2/nrfxlib)"
osource "C:/Users/Sachin/ncs/v2.0.2/nrfxlib/Kconfig.nrfxlib"
config ZEPHYR_NRFXLIB_MODULE
	bool
	default y
endmenu
menu "connectedhomeip (C:/Users/Sachin/ncs/v2.0.2/modules/lib/matter)"
osource "C:/Users/Sachin/ncs/v2.0.2/modules/lib/matter/config/nrfconnect/chip-module/Kconfig"
config ZEPHYR_CONNECTEDHOMEIP_MODULE
	bool
	default y
endmenu

[Susheel Nuguru]

This is defined in zephyr\drivers\clock_control\Kconfig.nrf but you might not see this if you have disabled the clock control (CLOCK_CONTROL ) in your proj.conf

[Sachin]

Hi Susheel,

     I don't seem to reference CLOCK_CONTROL in pro.conf. The same has been attached below We have a release planned. Can you please suggest how we should go about it?

#
# Copyright (c) 2018 Nordic Semiconductor
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

# Enable the UART driver
CONFIG_UART_ASYNC_API=y
CONFIG_NRFX_UARTE0=y
CONFIG_SERIAL=y

CONFIG_GPIO=y

# Make sure printk is printing to the UART console
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y

CONFIG_HEAP_MEM_POOL_SIZE=2048

CONFIG_BT=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEVICE_NAME="Nordic_UART_Service1"
CONFIG_BT_DEVICE_APPEARANCE=833
CONFIG_BT_MAX_CONN=1
CONFIG_BT_MAX_PAIRED=1

# Enable the NUS service
#CONFIG_BT_NUS=y

# Enable bonding
CONFIG_BT_SETTINGS=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y
CONFIG_NVS=y
CONFIG_SETTINGS=y

# Enable DK LED and Buttons library
CONFIG_DK_LIBRARY=y

# This example requires more workqueue stack
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

# Config logger
CONFIG_LOG=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_BACKEND_UART=n

CONFIG_ASSERT=y

CONFIG_BT_BUF_ACL_TX_SIZE=257
CONFIG_DEBUG_THREAD_INFO=y
CONFIG_DEBUG_OPTIMIZATIONS=y
CONFIG_BT_L2CAP_TX_MTU=247
CONFIG_BT_BUF_ACL_RX_SIZE=251
CONFIG_BT_NUS_UART_BUFFER_SIZE=200

[Susheel Nuguru]

I am sorry, I read this wrong. We need to have CONFIG_CLOCK_CONTROL enabled (and by default it is enabled).

You just need to add this line to your proj.conf

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

and I get this in the final .conf file

[Sachin]

Thanks this worked for me