I want to insert a DFU module through BLE in my old ble project to upgrade my nrf5340 image

[zhouhaifang]

    i have look for many DFU examples in NCS1.5.0 , but samples are Abstract ，and can not to start . a ble test  app in phone have a menu that  can  send file to nrf5340 through ble ,  when ble of nrf5340 receive this file  ,file can as  a new image.

[zhouhaifang]

Simon,thank you very much!

1. I have tried to merge peripheral_uart example and smp_svr example in one project , a ble service would do some ordinary work ,the other ble service will do DFU work , but failed .

2. I have saw a DFU method of nrf52832 through ble . when nrf52832 receive a DFU command from a connected app in phone , nrf52832 first write 0x01 in flash (address is  0 ), then reset . in the reset period ,app in phone send a DFU file , nrf52832 automatically DFU.  program  in nrf52832 have no code about DFU,  only only only write 0x01 in address 0 flash ,  then reset .i am confusing this for sereral days  , and  just asked former engineer ,he said a DFU code have loaded in bootloader of nrf52832 . i do not know the process of this DFU and how to operate .DOES NCS1.5.0 have this method DFU nrf5340 like this?

3.maybe can use a ble device name to register  two  ble services,  each service has it's own service connect node , it's own receive event handler, it's own send data function. but i am not skill to do this . example smp-svr own a ble service ,and example peripheral_uart own a ble service, and merge two example into one project .

[Simon]

Can you test the following patch with NCS v1.5.1: 

https://github.com/nrfconnect/sdk-nrf/compare/v1.5.1...simon-iversen:peripheral_uart_dfu

https://github.com/nrfconnect/sdk-nrf/compare/v1.5.1...simon-iversen:peripheral_uart_dfu.patch

It will make it possible to perform BLE DFU with the peripheral_uart sample. At least it worked for me:

*** Booting Zephyr OS build v2.4.99-ncs2  ***
I: Starting bootloader
I: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
I: Secondary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
I: Boot source: none
I: Swap type: none
I: Bootloader chainload address offset: 0xc000
*** Booting Zephyr OS build v2.4.99-ncs2  ***
Application version 1.0.0
Starting Nordic UART service example
*** Booting Zephyr OS build v2.4.99-ncs2  ***
I: Starting bootloader
I: Primary image: magic=unset, swap_type=0x1, copy_done=0x3, image_ok=0x3
I: Secondary image: magic=good, swap_type=0x2, copy_done=0x3, image_ok=0x3
I: Boot source: none
I: Swap type: test
I: Bootloader chainload address offset: 0xc000
*** Booting Zephyr OS build v2.4.99-ncs2  ***
Application version 2.0.0
Starting Nordic UART service example

Best regards,

Simon