DFU

RE: DFU

tesc — Fri, 24 Aug 2018 15:45:32 GMT

Hi,

This turns out to be a known bug in nRF5 SDK v12.2.0, where the (experimental) buttonless DFU hex file contains a register in the UICR. It was fixed for nRF5 SDK v13.0.0, as part of other changes where nrf_dfu_settings.c was no longer needed. However in the buttonless DFU example in SDK 12.2.0 some of the functionality in nrf_dfu_settings.c is still needed.

A manual fix for the hex files is to remove the following two lines from the application hex file:

:020000041000EA
:0410180000E00700ED

(But keep them in the bootloader hex file!)

There is also a permanent fix. The register is set lines 69 through 89 in nrf_dfu_settings.c. (Starting with a brief stating "This variable makes the linker script write the mbr parameters page address to the UICR register(...)" This code must be included when building the bootloader. The code must be excluded when building the buttonless DFU application. I propose that you set a define BOOTLOADER in the bootloader project, and surround the mentioned code lines with "#ifdef BOOTLOADER" / "#endif".

I also recommend you to read through release notes for later SDKs up to the point where the buttonless DFU example is no longer experimental, and see if there are other bugs or issues that are relevant for you.

Regards,
Terje

RE: DFU

zwf — Fri, 24 Aug 2018 10:20:36 GMT

Can I not use the nrf_dfu_settings.c ？ not use the struct nrf_dfu_settings_t ？

RE: DFU

zwf — Fri, 24 Aug 2018 09:55:49 GMT

Hi,

(1) : I try to merge bootloader.hex and app.hex only ,and i still get the same error.

(2) : Yes , i add buttonless DFU example code in my project

RE: DFU

tesc — Thu, 23 Aug 2018 16:58:06 GMT

Hi,

Basically the error means that the two hex files contain data for the same memory location. In this case the conflict seems to be with bootloader.hex and app.hex. In order to confirm and investigate further, can you check that if you try to merge those two files only you still get the same error? (I.e. try "mergehex --merge bootloader.hex app.hex --output test.hex")

In order to investigate further, I would like to have a look at the files themselves. If you cannot share them here on the public forum then please create a private ticket and refer to this case. You can also let me know here and I will find the new (private) case in our systems.

If I understand things correctly you have based your application on the buttonless DFU example from 12.2. Is that correct? Please note that that example was experimental in SDK 12.2.

Regards,
Terje

RE: DFU

zwf — Tue, 21 Aug 2018 03:20:19 GMT

CMD ：

nrfutil settings generate --family NRF52 --application app.hex --application-version 1 --bootloader-version 1 --bl-settings-version 1 bootloader_settings.hex
mergehex --merge bootloader.hex softdevice.hex --output production_final1.hex
mergehex --merge production_final1.hex app.hex --output production_final2.hex
mergehex --merge production_final2.hex bootloader_settings.hex --output final.hex

LOGO ：

nrfutil settings generate --family NRF52 --application C003S_nRF52_PG000.hex --application-version 1 --bootloader-version 1 --bl-settings-version 1 bootloader_settings.hex

Generated Bootloader DFU settings .hex file and stored it in: bootloader_settings.hex

Bootloader DFU Settings:
* File:                 bootloader_settings.hex
* Family:               nRF52
* CRC:                  0xA74D6B78
* Settings Version:     0x00000001 (1)
* App Version:          0x00000001 (1)
* Bootloader Version:   0x00000001 (1)
* Bank Layout:          0x00000000
* Current Bank:         0x00000000
* Application Size:     0x00018264 (98916 bytes)
* Application CRC:      0xB07BABE6
* Bank0 Bank Code:      0x00000001

mergehex --merge bootloader.hex softdevice.hex --output production_final1.hex
Parsing input hex files.
Merging files.
Storing merged file.

mergehex --merge production_final1.hex app.hex --output production_final2.hex
Parsing input hex files.
Merging files.
ERROR: The hex files cannot be merged since there are conflicts.

mergehex --merge production_final2.hex bootloader_settings.hex --output C003S_NOBTN_DFU_PG000_V0.0.0.hex
Parsing input hex files.
ERROR: One of the files to merge cannot be found.

RE: DFU

tesc — Mon, 20 Aug 2018 15:43:54 GMT

Hi,

nrf_dfu_settings.c is part of the bootloader, and it is needed for the bootloader to function correctly.

What hex files are you merging?

Regards,
Terje