Using flash_img.h in Zephyr boot

[lorao]

I want to include  #include <zephyr/dfu/flash_img.h> in boot/zephyr/main.c  (path: C:\ncs\v2.4.0\bootloader\mcuboot\boot\zephyr\main.c)
And header file path (C:\ncs\v2.4.0\zephyr\include\zephyr\dfu\flash_img.h).

But after adding flash_img.h I get a linker error: collect2.exe: error: ld returned 1 exit status

Also tried by adding path in CmakeList.txt file as "zephyr_include_directories(${ZEPHYR_BASE}/include/zephyr/dfu)"
Still does not solve the issue.

Please can you suggest what else needs to be done in order to use this header?

PS: using nRF52840dk

Thankyou

[Naeem Maroof]

Hello

What you are trying to do ?

Bootloader, or Mcuboot are not the sample codes.

You typically start with the sample code and then add your changes into it.

So, what you are trying to build actually? are you using some example code and want to include the bootloader?

If I search for mcuboot in the NCS VS Code extension, then I can see NSIB sample, also note that all samples are either in the nrf/samples or zephyr/samples.

Please let me know what project / sample you want to build and then what changes you to incorporate.

BR,

Naeem

[lorao]

Naeem Maroof I am trying to implement some changes in the MCUboot, where I can send image file over UART and then the files are written in the specified partition.

In that case I want to use flash_img.h, where I can specify the slot where the image needs to be flashed.

[Naeem Maroof]

Hello,

I tried to build an application with the mcuboot, and then applied the change which you wanted to do (that is adding flash_img header in the source code of mcuboot).

I was able to see that the build was unsuccessful, and it mentioned the error "FATAL ERROR: command exited with status 1:"

However, the reason of the failure was that a symbol "CONFIG_IMG_BLOCK_BUF_SIZE" in undefined.

This symbol is used in the FLASH_IMG.H file, and it is not defined there.

I tried to configure this symbol but it was giving the same error (maybe I was not able to satisfy all its dependencies, or even further 2nd level dependencies).

As the default value of symbol is 512 Bytes, I replaced the symbol in the file with 512, and it was able to compile correctly.

BR,

Naeem

[lorao]

 Naeem Maroof Thank you for the information. 

I had done the changes already

 

It works fine, when just flash_img.h is included.

But, when I try to use flash_img_init_id and flash_img_buffered_write which is defined in flash_img.h shows an linker error. Also tried to add this in CmakeList.txt, but still shows an linker error:

Error:

Thank you

[lorao]

 Naeem Maroof Any comment for the above issue
Thanks!

[Naeem Maroof]

Please try by adding following (for flash_img) in the /bootloader/mcuboot/boot/zephyr/CMakeLists.txt

zephyr_library_sources(
  ${ZEPHYR_BASE}/subsys/dfu/img_util/flash_img.c
  )

[lorao]

Naeem Maroof 

I am trying to implement a logic on nRF52840, to send image file over UART in bootloader mode.
Please can you suggest what needs to be taken care for this.

Note: I dont want to use dependencies like mcumgr.

Thank you

[Naeem Maroof]

Hello,

Thank you for your patience.

My colleague has informed that this should be handled through configs and not the cmake.

He has suggested to add FLASH_MAP config that would include flash_map.c, and would also resolve other dependencies including img-block-size.

I have updated the proj.conf of the mcuboot accordingly by appending following:

CONFIG_FLASH_MAP=y
CONFIG_STREAM_FLASH=y
CONFIG_IMG_MANAGER=y

And correspondingly BOOTLOADER_MCUBOOT is enabled in the main project conf.

I can now use the function that you have mentioned, and project compiles successfully.

BR, Naeem