DFU on nrf52832

[Moh]

Hi, I am having problem making DFU work on nrf52832 using nrf connect sdk 2.6.0.  Below is my mcuboot.conf under child_image and prj.conf. Please guide me where I am wrong. Also when I set CONFIG_SINGLE_APPLICATION_SLOT, it builds fine but when I disables it, it doesn't build due to size issue.

&flash0 {

partitions {

compatible = "fixed-partitions";

#address-cells = <1>;

#size-cells = <1>;

boot_partition: partition@0 {

label = "mcuboot";

reg = <0x00000000 0xC000>;

};

slot0_partition: partition@C000 {

label = "image-0";

reg = <0x0000C000 0x2C000>;

};

slot1_partition: partition@38000 {

label = "image-1";

reg = <0x00038000 0x2C000>;

};

storage_partition: partition@64000 {

label = "storage";

reg = <0x00064000 0x4000>;

};

};

};

# Logging

CONFIG_LOG=y

CONFIG_MCUBOOT_LOG_LEVEL_WRN=y

# CONFIG_PM_PARTITION_SIZE_MCUBOOT=0x15000

CONFIG_SINGLE_APPLICATION_SLOT=y

and prj.conf

#

# Copyright (C) 2024 Walk With Path Corp. All Rights Reserved.

# Project Configuration File

#

# This file contains configuration settings for Bluetooth, logging, peripherals,

# memory optimization, DFU support, and other key features for Zephyr-based applications.

#

# ==============================

# General Debugging and Logging

# ==============================

CONFIG_LOG=y # Enable logging framework

CONFIG_LOG_BACKEND_UART=y # Use UART backend for logs

CONFIG_LOG_PRINTK=y # Allow printk for logs

CONFIG_CBPRINTF_FP_SUPPORT=y # Enable floating-point support in logs

# Enable console for debug purposes

CONFIG_CONSOLE=y

CONFIG_UART_CONSOLE=y

CONFIG_DEBUG=y # Enable debugging

CONFIG_PRINTK=y # Enable printk debugging

CONFIG_SHELL=n # Enable Zephyr Shell for debugging

CONFIG_SHELL_LOG_BACKEND=y

CONFIG_SHELL_CMD_BUFF_SIZE=128

# Enable RTT (Real-Time Transfer) for logs (alternative to UART)

CONFIG_USE_SEGGER_RTT=y

CONFIG_LOG_BACKEND_RTT=y

CONFIG_RTT_CONSOLE=y

CONFIG_UART_CONSOLE=y # Disable UART console if RTT is enabled

CONFIG_SEGGER_RTT_BUFFER_SIZE_UP=512

CONFIG_SEGGER_RTT_MODE_BLOCK_IF_FIFO_FULL=y

CONFIG_LOG_BLOCK_IN_THREAD=y

CONFIG_LOG_BUFFER_SIZE=256

CONFIG_DEBUG=y # Enable debugging

CONFIG_DEBUG_INFO=y

CONFIG_DEBUG_THREAD_INFO=y

# CONFIG_NCS_BOOT_BANNER=y # Enable NCS boot banner

CONFIG_BOOT_BANNER=y

CONFIG_PRINTK=y

# Enable UART support

CONFIG_SERIAL=y

# ==============================

# Peripheral and Sensor Drivers

# ==============================

CONFIG_I2C=y # Enable I2C interface

CONFIG_SPI=y # Enable SPI interface

CONFIG_ADC=y # Enable ADC driver

CONFIG_SENSOR=y # Enable generic sensor support

CONFIG_TMP116=y # Enable TMP116 temperature sensor

CONFIG_BMI270=y # Enable BMI270 accelerometer

CONFIG_BMI270_TRIGGER_GLOBAL_THREAD=y

CONFIG_WATCHDOG=y # Enable watchdog timer

CONFIG_WDT_LOG_LEVEL_DBG=y

CONFIG_WDT_DISABLE_AT_BOOT=n

# Enable LED and regulator drivers

CONFIG_LED=y

CONFIG_REGULATOR=y

# Enable power management IC (NPMX)

# CONFIG_NPMX=y

# CONFIG_NPMX_DEVICE_NPM1300=y

# Enable Nordic Fuel Gauge and BMI270 (Accelerometer and Gyroscope)

CONFIG_NRF_FUEL_GAUGE=y

# Disable SPI NOR flash driver (if not used)

CONFIG_SPI_NOR=n

# ==============================

# Power and Memory Optimizations

# ==============================

# Power management configuration

CONFIG_PM_DEVICE=y

CONFIG_PM_DEVICE_RUNTIME=y

# ==============================

# Memory Optimizations

# ==============================

# Configure memory pool and stack sizes

CONFIG_MAIN_STACK_SIZE=2048

CONFIG_HEAP_MEM_POOL_SIZE=1024

# ==============================

# Flash Configuration

# ==============================

CONFIG_FLASH=y # Enable flash memory support

CONFIG_FLASH_PAGE_LAYOUT=y

CONFIG_FLASH_MAP=y

CONFIG_MPU_ALLOW_FLASH_WRITE=y

CONFIG_BT_SETTINGS=y # Enable Bluetooth settings

CONFIG_SETTINGS=y # Enable settings subsystem

CONFIG_NVS=y # Enable Non-Volatile Storage

CONFIG_NVS_LOG_LEVEL_DBG=y

# ==============================

# Bluetooth Settings

# ==============================

CONFIG_NCS_SAMPLES_DEFAULTS=y

# Enable Bluetooth and controller settings

CONFIG_BT=y

CONFIG_BT_HCI=y

CONFIG_BT_CTLR=y

CONFIG_BT_PERIPHERAL=y

CONFIG_BT_BROADCASTER=n

CONFIG_BT_SMP=y

CONFIG_BT_BONDABLE=y

CONFIG_BT_CTLR_ADV_EXT=n

CONFIG_BT_DEVICE_APPEARANCE=1345

CONFIG_BT_DEVICE_NAME_DYNAMIC=y

CONFIG_BT_GATT_CLIENT=y

# Bluetooth security and bonding settings

CONFIG_BT_KEYS_OVERWRITE_OLDEST=y

CONFIG_BT_SMP_ALLOW_UNAUTH_OVERWRITE=y

CONFIG_BT_ID_UNPAIR_MATCHING_BONDS=y

CONFIG_BT_PRIVACY=n

CONFIG_BT_TINYCRYPT_ECC=y

CONFIG_BT_CTLR_PHY_2M=y

CONFIG_BT_USER_PHY_UPDATE=y

# Bluetooth buffer and connection settings

CONFIG_BT_BUF_ACL_RX_SIZE=247

CONFIG_BT_ATT_PREPARE_COUNT=2

CONFIG_BT_BUF_ACL_TX_SIZE=256

CONFIG_BT_BUF_ACL_TX_COUNT=10

CONFIG_BT_L2CAP_TX_MTU=247

CONFIG_BT_L2CAP_TX_BUF_COUNT=10

CONFIG_BT_L2CAP_DYNAMIC_CHANNEL=y

CONFIG_BT_CTLR_DATA_LENGTH_MAX=247

CONFIG_BT_CTLR_RX_BUFFERS=2

CONFIG_BT_CONN_TX_MAX=10

CONFIG_BT_GAP_AUTO_UPDATE_CONN_PARAMS=n

CONFIG_BT_GATT_DM=y

# Allow only LESC pairing

# CONFIG_BT_SMP_SC_PAIR_ONLY=y

# Configure Bluetooth connection settings

CONFIG_BT_CTLR_TX_PWR_0=y

CONFIG_BT_MAX_CONN=1

CONFIG_BT_MAX_PAIRED=1

# Enable PHY updates

CONFIG_BT_USER_PHY_UPDATE=y

CONFIG_BT_USER_DATA_LEN_UPDATE=y

# Enable Bluetooth shell for debugging

CONFIG_BT_SHELL=n

# Enable BT NUS (Nordic UART Service) shell for testing

# CONFIG_SHELL_BT_NUS=y

# Enable Battery Service (BAS) for battery level reporting

CONFIG_BT_BAS=y

# ==============================

# Cryptography

# ==============================

CONFIG_TINYCRYPT=y # Enable TinyCrypt for secure operations

CONFIG_BT_TINYCRYPT_ECC=y

# ==============================

# Reboot and Misc Settings

# ==============================

CONFIG_REBOOT=y # Enable reboot functionality

# ==============================

# DFU Support and Bootloader

# ==============================

# Enable mcumgr.

CONFIG_MCUMGR=y

# Enable MCUboot and FOTA

CONFIG_BOOTLOADER_MCUBOOT=y

# CONFIG_MCUBOOT_SIGNATURE_KEY_FILE="bootloader/mcuboot/root-rsa-2048.pem"

CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU=y

CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU_SPEEDUP=y

# Enable image management

CONFIG_MCUMGR_TRANSPORT_BT=y

CONFIG_MCUMGR_TRANSPORT_BT_AUTHEN=n

CONFIG_MCUMGR_TRANSPORT_BT_CONN_PARAM_CONTROL=y

CONFIG_IMG_MANAGER=n

CONFIG_MCUBOOT_IMG_MANAGER=y

CONFIG_IMG_ERASE_PROGRESSIVELY=y

# Enable logging for mcumgr (DFU)

CONFIG_MCUMGR_LOG_LEVEL_DBG=y

CONFIG_MCUMGR_LOG_LEVEL_INF=y

# Enable logging for image management subsystem

CONFIG_IMG_MANAGER_LOG_LEVEL_DBG=y

CONFIG_IMG_MANAGER_LOG_LEVEL_INF=y

# # Enable mcumgr DFU in application

# # Enable MCUMGR

# # Enable MCUMGR management for both OS and Images

# CONFIG_MCUMGR_GRP_OS=y

# CONFIG_MCUMGR_GRP_IMG=y

# Support for taskstat command

CONFIG_MCUMGR_GRP_OS_TASKSTAT=y

# Enable statistics and statistic names.

CONFIG_STATS=y

CONFIG_STATS_NAMES=y

# Enable most core commands.

CONFIG_MCUMGR_GRP_IMG=y

CONFIG_MCUMGR_GRP_OS=y

CONFIG_MCUMGR_GRP_STAT=y

[AHaug]

Hi,

I recommend you to have a look at this lesson in the intermediate course about bootloaders and DFU https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-bootloaders-and-dfu-fota/ 

In short what happens when you don't use CONFIG_SINGLE_APPLICATION_SLOT is that you're using a dual bank DFU, meaning that you cut your available application space in half since you have two application slots. On the first slot, you have your running application, while on the second slot you will temporary store the update image whenever you perform an update.

This is explained in closer detail in the theory sections before the exercises.

Let me know if this answers your questions.

Kind regards,
Andreas

[Moh]

Can I have CONFIG_SINGLE_APPLICATION_SLOT DFU over BLE? 

[AHaug]

Hi

Moh said:

Any chance to have a live session? Thanks Moh

Unfortunately we typically don't do live sessions and when we do they have to be arranged through your regional sales manager.

Moh said:

If I don't include at25xe321d in overlay, mcuboot builds fine and eventually the app

Ok, this is good since we now have isolated that the issue is with configuring the external flash and presumably that everything else works as it should. Could you post the build log with errors for the unsuccessful build with the external flash (for the setup without using CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU)? I still see in the latest 1581.prj_release.conf that you're using this configuration

Kind regards,
Andreas

[Moh]

Hi Andreas,

Please find the log attached. I have also attached the prj_release file. As you can see, I have commented out  CONFIG_NCS_SAMPLE_MCUMGR_BT_OTA_DFU. I have also attached log from devicetree.generated.h for undefined __device_dts_ord_105

/* Node's dependency ordinal: */

#define DT_N_S_soc_S_i2c_40004000_ORD 105

#define DT_N_S_soc_S_i2c_40004000_ORD_STR_SORTABLE 00105

0005.prj_release.conf

-- west build: building application
[1/349] Preparing syscall dependency handling

[9/349] Generating include/generated/version.h
-- Zephyr version: 3.5.99 (/opt/nordic/ncs/v2.6.0/zephyr), build: v3.5.99-ncs1
[1/271] Preparing syscall dependency handling

[4/271] Generating include/generated/version.h
-- Zephyr version: 3.5.99 (/opt/nordic/ncs/v2.6.0/zephyr), build: v3.5.99-ncs1
[266/271] Linking C executable zephyr/zephyr_pre0.elf
FAILED: zephyr/zephyr_pre0.elf zephyr/zephyr_pre0.map /Users/mohsin/path-feel-zephyr-fw/app/build_release/mcuboot/zephyr/zephyr_pre0.map 
: && ccache /opt/nordic/ncs/toolchains/580e4ef81c/opt/zephyr-sdk/arm-zephyr-eabi/bin/arm-zephyr-eabi-gcc  -gdwarf-4 zephyr/CMakeFiles/zephyr_pre0.dir/misc/empty_file.c.obj -o zephyr/zephyr_pre0.elf  zephyr/CMakeFiles/offsets.dir/./arch/arm/core/offsets/offsets.c.obj  -fuse-ld=bfd  -T  zephyr/linker_zephyr_pre0.cmd  -Wl,-Map=/Users/mohsin/path-feel-zephyr-fw/app/build_release/mcuboot/zephyr/zephyr_pre0.map  -Wl,--whole-archive  app/libapp.a  zephyr/libzephyr.a  zephyr/arch/common/libarch__common.a  zephyr/arch/arch/arm/core/libarch__arm__core.a  zephyr/arch/arch/arm/core/cortex_m/libarch__arm__core__cortex_m.a  zephyr/arch/arch/arm/core/mpu/libarch__arm__core__mpu.a  zephyr/lib/libc/minimal/liblib__libc__minimal.a  zephyr/lib/libc/common/liblib__libc__common.a  zephyr/soc/soc/arm/nordic_nrf/libsoc__arm__nordic_nrf.a  zephyr/drivers/clock_control/libdrivers__clock_control.a  zephyr/drivers/console/libdrivers__console.a  zephyr/drivers/flash/libdrivers__flash.a  zephyr/drivers/gpio/libdrivers__gpio.a  zephyr/drivers/pinctrl/libdrivers__pinctrl.a  zephyr/drivers/serial/libdrivers__serial.a  zephyr/drivers/timer/libdrivers__timer.a  modules/nrf/lib/fprotect/lib..__nrf__lib__fprotect.a  modules/nrf/lib/fatal_error/lib..__nrf__lib__fatal_error.a  modules/mcuboot/boot/bootutil/zephyr/libmcuboot_util.a  modules/mbedtls/libmbedTLSBase.a  modules/mbedtls/libmbedTLSCrypto.a  modules/mbedtls/libmbedTLSX509.a  modules/mbedtls/libmodules__mbedtls.a  modules/hal_nordic/nrfx/libmodules__hal_nordic__nrfx.a  modules/segger/libmodules__segger.a  -Wl,--no-whole-archive  zephyr/kernel/libkernel.a  -L"/opt/nordic/ncs/toolchains/580e4ef81c/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/thumb/v7e-m/nofp"  -L/Users/mohsin/path-feel-zephyr-fw/app/build_release/mcuboot/zephyr  -lgcc  zephyr/arch/common/libisr_tables.a  modules/mbedtls/libmbedTLSBase.a  modules/mbedtls/libmbedTLSCrypto.a  modules/mbedtls/libmbedTLSX509.a  -mcpu=cortex-m4  -mthumb  -mabi=aapcs  -mfp16-format=ieee  -Wl,--gc-sections  -Wl,--build-id=none  -Wl,--sort-common=descending  -Wl,--sort-section=alignment  -Wl,-u,_OffsetAbsSyms  -Wl,-u,_ConfigAbsSyms  -nostdlib  -static  -Wl,-X  -Wl,-N  -Wl,--orphan-handling=warn  -Wl,-no-pie && cd /Users/mohsin/path-feel-zephyr-fw/app/build_release/mcuboot/zephyr && /opt/nordic/ncs/toolchains/580e4ef81c/Cellar/cmake/3.21.0/bin/cmake -E true
/opt/nordic/ncs/toolchains/580e4ef81c/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd: zephyr/drivers/flash/libdrivers__flash.a(spi_nor.c.obj): in function `k_sleep':
/Users/mohsin/path-feel-zephyr-fw/app/build_release/mcuboot/zephyr/include/generated/syscalls/kernel.h:135: undefined reference to `z_impl_k_sleep'
/opt/nordic/ncs/toolchains/580e4ef81c/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd: /Users/mohsin/path-feel-zephyr-fw/app/build_release/mcuboot/zephyr/include/generated/syscalls/kernel.h:135: undefined reference to `z_impl_k_sleep'
/opt/nordic/ncs/toolchains/580e4ef81c/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd: zephyr/drivers/flash/libdrivers__flash.a(spi_nor.c.obj):(.rodata.spi_nor_config_0+0x0): undefined reference to `__device_dts_ord_105'
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

[AHaug]

Moh said:

Please find the log attached. I have also attached the prj_release file. As you can see, I have commented out 

My bad, I didn't spot the #.

Could you check with this sample (and your external flash) if you're able to get the external flash device running? https://docs.zephyrproject.org/latest/samples/drivers/spi_flash/README.html

You might need to run https://docs.zephyrproject.org/latest/samples/drivers/jesd216/README.html if the parameters in &spi2 is wrong

&spi2 {
    compatible = "nordic,nrf-spi";
    status = "okay";
    pinctrl-0 = <&spi2_default>;
    pinctrl-1 = <&spi2_sleep>;
    pinctrl-names = "default", "sleep";
    cs-gpios = <&gpio0 16 GPIO_ACTIVE_LOW>;

    at25xe321d: at25xe321d@0 {
        #address-cells = <1>;
        #size-cells = <1>;
		partitions {
			compatible = "fixed-partitions";
			#address-cells = <1>;
			#size-cells = <1>;

			slot1_partition: partition@0 {
				label = "image-1";
				reg = <0x0000000 DT_SIZE_K(472)>;
			};
			/* to be used in firmware */
			store_partition: partition@100000 {
				label = "store";
				reg = <0x00100000 0x00400000>;
			};
		};
		compatible = "jedec,spi-nor";
        reg = <0>; // Chip select 0
        spi-max-frequency = <100000000>;
        jedec-id = [1F 47 0C];
        // size = <0x400000>;  // 4 MB
		size = <DT_SIZE_M(4)>;
		has-dpd;
		t-enter-dpd = < 3000 >;
		t-exit-dpd = < 1200000 >;
    };
};

Kind regards,
Andreas

[Moh]

Hi Andreas, When I try to build the sample (without mcuboot) with above attached spi2 dts configurations, I got similar error

/opt/nordic/ncs/toolchains/580e4ef81c/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd: zephyr/libzephyr.a(flash_map_default.c.obj):(.rodata.default_flash_map+0x4c): undefined reference to `__device_dts_ord_122'
/opt/nordic/ncs/toolchains/580e4ef81c/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/12.2.0/../../../../arm-zephyr-eabi/bin/ld.bfd: zephyr/libzephyr.a(flash_map_default.c.obj):(.rodata.default_flash_map+0x5c): undefined reference to `__device_dts_ord_122'

but when I build with without partitions defined, It builds and runs fine.

&spi2 {
    compatible = "nordic,nrf-spi";
    status = "okay";
    pinctrl-0 = <&spi2_default>;
    pinctrl-1 = <&spi2_sleep>;
    pinctrl-names = "default", "sleep";
    cs-gpios = <&gpio0 16 GPIO_ACTIVE_LOW>;
	at25xe321d: at25xe321d@0 {
        #address-cells = <1>;
        #size-cells = <1>;
		compatible = "jedec,spi-nor";
        reg = <0>; // Chip select 0
        spi-max-frequency = <100000000>;
        jedec-id = [1F 47 0C];
        // size = <0x400000>;  // 4 MB
		size = <DT_SIZE_M(4)>;
		has-dpd;
		t-enter-dpd = < 3000 >;
		t-exit-dpd = < 1200000 >;
    };
};

[AHaug]

Do you also get the expected output from the sample, i.e are you able to run it?

Kind regards,
Andreas

[Moh]

Hi Andreas, I have managed to build and run the sample with that dts spi2 configurations. I don't know why my application doesn't build.

&spi2 {
    compatible = "nordic,nrf-spi";
    status = "okay";
    pinctrl-0 = <&spi2_default>;
    pinctrl-1 = <&spi2_sleep>;
    pinctrl-names = "default", "sleep";
    cs-gpios = <&gpio0 16 GPIO_ACTIVE_LOW>;
	at25xe321d: at25xe321d@0 {
        #address-cells = <1>;
        #size-cells = <1>;
		partitions {
			compatible = "fixed-partitions";
			#address-cells = <1>;
			#size-cells = <1>;

			slot1_partition: partition@0 {
				label = "image-1";
				reg = <0x0000000 DT_SIZE_K(472)>;
			};
			/* to be used in firmware */
			store_partition: partition@100000 {
				label = "store";
				reg = <0x00100000 0x00400000>;
			};
		};
		compatible = "jedec,spi-nor";
        reg = <0>; // Chip select 0
        spi-max-frequency = <100000000>;
        jedec-id = [1F 47 0C];
        // size = <0x400000>;  // 4 MB
		size = <DT_SIZE_M(4)>;
		has-dpd;
		t-enter-dpd = < 3000 >;
		t-exit-dpd = < 1200000 >;
    };
};

[Moh]

Hi Andreas, I have managed to build the application (without mcuboot) with above spi2 dts configuration if I comment out bt_enable(NULL); from my application. I have no idea why it's causing that.

[Moh]

Hi Andreas, do you have any update? Thanks Moh

[AHaug]

Hi,

Some times it takes longer than a day to get back for a reply, which is why I didn't get back to you before now. In these unfortunate cases, here are some resources for you to use to spend more time debugging while waiting for a reply: https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-2-debugging/ and https://docs.nordicsemi.com/bundle/ncs-latest/page/zephyr/develop/west/build-flash-debug.html#permanent_cmake_arguments 

The https://github.com/aHaugl/samples_for_NCS/blob/main/bootloader/spi/smp_ble_feat_spi/child_image sample should've also been enough to use for comparison together with the two zephyr samples I sent in my previous reply

Moh said:

I have managed to build and run the sample with that dts spi2 configurations.

Which of the two samples are you referring to here? And great! Did you see the expected output when hooking the device up to a terminal? If you ran the JESD216 sample as well, which output did you get?

Next after getting these two samples up and running, which means that if you got the correct output, then the external flash would've been correctly configured, I intended for you to compare those two samples with https://github.com/aHaugl/samples_for_NCS/tree/main/bootloader/spi/smp_ble_feat_spi and replace the mx25 flash I've used here with your at25x flash. One difference I can spot immedeatly is the difference between the mcuboot.overlay in the smp_ble_feat_spi sample with your application and your mcuboot.overlay is that you're missing to add the spi device into mcuboot.overlay (which you've done in your board file. MCUboot also needs to be aware of the external flash for it to use it.

Try to get https://github.com/aHaugl/samples_for_NCS/blob/main/bootloader/spi/smp_ble_feat_spi/child_image up and running with your external flash and compare the setup there with your application

I hope that you're successful in this and please feel free to ask follow up questions regarding the configuration and samples if needed

Kind regards,
Andreas

[Moh]

Hi Andreas, I have managed to build https://docs.zephyrproject.org/latest/samples/drivers/spi_flash/README.html with below dts

&spi2 {
    compatible = "nordic,nrf-spi";
    status = "okay";
    pinctrl-0 = <&spi2_default>;
    pinctrl-1 = <&spi2_sleep>;
    pinctrl-names = "default", "sleep";
    cs-gpios = <&gpio0 16 GPIO_ACTIVE_LOW>;
	at25xe321d: at25xe321d@0 {
        #address-cells = <1>;
        #size-cells = <1>;
		partitions {
			compatible = "fixed-partitions";
			#address-cells = <1>;
			#size-cells = <1>;

			slot1_partition: partition@0 {
				label = "image-1";
				reg = <0x0000000 DT_SIZE_K(472)>;
			};
			/* to be used in firmware */
			store_partition: partition@100000 {
				label = "store";
				reg = <0x00100000 0x00400000>;
			};
		};
		compatible = "jedec,spi-nor";
        reg = <0>; // Chip select 0
        spi-max-frequency = <100000000>;
        jedec-id = [1F 47 0C];
        // size = <0x400000>;  // 4 MB
		size = <DT_SIZE_M(4)>;
		has-dpd;
		t-enter-dpd = < 3000 >;
		t-exit-dpd = < 1200000 >;
    };
};

When I try to build my application without mciboot/DFU, it doesn't build. When I commented out 

bt_enable(NULL); from my code base, it builds. I am figuring out why this is the case as I need BLE enabled in my application.