ncs1.6.0 ota problem b0 or (immutable MCUboot)

[Август]

Hello 

I want to test ncs ota function. b0 module following this link.

ncs1.6.0 

borad:nrf52840dk_nrf52840

projece: ncs/zephyr/samples/hello_world

1. b0 + spm test.

prj.conf

# nothing here
CONFIG_SECURE_BOOT=y

CONFIG_MCUMGR=y
CONFIG_MCUMGR_CMD_OS_MGMT=y
CONFIG_MCUMGR_CMD_IMG_MGMT=y

CONFIG_MCUMGR_SMP_BT=y
CONFIG_MCUMGR_SMP_BT_AUTHEN=n

copy ncs/zephyr/samples/subsys/mgmt/mcumgr/smp_svr/src/bluetooth.c to  ncs/zephyr/samples/hello_world/src

copy ncs/zephyr/samples/subsys/mgmt/mcumgr/smp_svr/src/common.h to  ncs/zephyr/samples/hello_world/src

Change CMakeLists.txt

# SPDX-License-Identifier: Apache-2.0

cmake_minimum_required(VERSION 3.13.1)

find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})

project(hello_world)

target_sources(app PRIVATE src/main.c)

target_sources(app PRIVATE src/bluetooth.c )

Change main.c

/*
 * Copyright (c) 2012-2014 Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr.h>
#include <sys/printk.h>

#include "os_mgmt/os_mgmt.h"
#include "img_mgmt/img_mgmt.h"
#include "mgmt/mcumgr/smp_bt.h"

#include "common.h"

void main(void)
{
	os_mgmt_register_group();
	img_mgmt_register_group();
	smp_bt_register();
	start_smp_bluetooth();
	printk("Hello World! %s\n", CONFIG_BOARD);
}

I can't build it without problems.

I notised that  CONFIG_BOOTLOADER_MCUBOOT=y need configed but I don't want to test MCUBoot, so I go to the next step adding MCUboot as an immutable bootloader.

2.adding MCUboot as an immutable bootloader

Change the first step prj.conf 

# nothing here
CONFIG_BOOTLOADER_MCUBOOT=y

CONFIG_MCUMGR=y
CONFIG_MCUMGR_CMD_OS_MGMT=y
CONFIG_MCUMGR_CMD_IMG_MGMT=y

CONFIG_MCUMGR_SMP_BT=y
CONFIG_MCUMGR_SMP_BT_AUTHEN=n

Copy ncs/zephyr/samples/hello_world/build/zephyr/app_update.bin to android app nRF Connect,But I can't update it below is the video.

Thank you.

[Einar Thorsrud]

Hi,

I do not immediately spot the problem. Can you share the log from the nRF side? Also, can yo upload your project (so not just description of changes, but all .c files, prj.conf, CMakeLists.txt and any other files within your application folder?

[Август]

Hi,

I want test b0 + app and update app.

mcuboot + app I have solved this problem.

I have used smp_bt_register(); twice.

Thank you.

[Einar Thorsrud]

If you want to do this, then you can refer to the nRF Desktop projects that use B0 only to see how that is done. You need to adjust your prj.conf as well as your main.c. It is also covered briefly in this tutorial.

Specifically, for B0 you need the following configuration (adapt key path):

CONFIG_SECURE_BOOT=y
CONFIG_BUILD_S1_VARIANT=y
CONFIG_FW_INFO=y
CONFIG_FW_INFO_FIRMWARE_VERSION=1
CONFIG_SB_SIGNING_KEY_FILE="path/to/key.pem"

However, you would also need to remove the mcumgr related code and add something similar to what is in nrf\applications\nrf_desktop\src\modules\dfu.c (which is added to the nRF Desktop projects by the Kconfig CONFIG_DESKTOP_CONFIG_CHANNEL_DFU_ENABLE configuration to handle the DFU process.

[Август]

Thank you

I will try to do this. How to enter dfu mode?

[Einar Thorsrud]

For OTA updates you would have to implement something yourself as the Immutable bootloader does not support SMP updates. If you need that, it makes sense to use MCUBoot as the second stage bootloader (or only bootloader if you do not need secure boot). See Bootloaders and Device Firmware Updates for an overview.