The process of ble ota is a bit long

RE: The process of ble ota is a bit long

666 — Wed, 18 Dec 2024 07:38:34 GMT

I succeeded, thank you very much

RE: The process of ble ota is a bit long

Vidar Berg — Wed, 18 Dec 2024 07:30:09 GMT

The mcuboot.conf file (Kconfig fragment) must be placed in a folder named 'sysbuild' for it to be detected by the build system.

Edit: Here is the project I used for test:

devzone.nordicsemi.com/.../7776.peripheral_5F00_lbs_5F00_dfu.zip

RE: The process of ble ota is a bit long

666 — Wed, 18 Dec 2024 07:26:29 GMT

I first created file mcuboot.conf, then clicked pristine build,I didn't add new Kconfig or DT overlays .I don't know why it didn't set up successfully. Do you have any suggestions

RE: The process of ble ota is a bit long

Vidar Berg — Wed, 18 Dec 2024 06:49:36 GMT

Please check if the CONFIG_NRF_RRAM_WRITE_BUFFER_SIZE symbol got set to '32' in your build by checking the configuration file generated for the mcuboot build:

Note that you must perform a pristine build after adding new Kconfig or DT overlays for it to be applied to the build.

[quote user="666"]2.How long is normal for ble ota in NRF54L15?[/quote]

I tested this change, and the copy process was reduced from around 80 seconds as in your case, to just 6 seconds.

RE: The process of ble ota is a bit long

666 — Wed, 18 Dec 2024 02:01:34 GMT

1.It seems to have no effect. I created a 'mcuboot.conf' file based on my previous work and included the following content.

However, the device runs very slowly and takes over 70 seconds to operate.

Then I changed "CONFIG_MAIN_STACK_SIZE=1152" to "CONFIG_MAIN_STACK_SIZE=4096" and it will run normally, but the effect was the same as before and had no effect

2.How long is normal for ble ota in NRF54L15?

Looking forwad to your reply!

RE: The process of ble ota is a bit long

Vidar Berg — Tue, 17 Dec 2024 13:47:16 GMT

Hi,

It seems like MCUBoot builds do not enable the RRAM write buffer by default. As a result, the routine that copies the updated image from the secondary slot to the primary slot becomes very slow.

Please try to add this line to your mcuboot configuration:

# Increase log level in bootloader
CONFIG_LOG_DEFAULT_LEVEL=4
CONFIG_MCUBOOT_LOG_LEVEL_DBG=y
# Enable write buffer for faster writes to RRAM
CONFIG_NRF_RRAM_WRITE_BUFFER_SIZE=32

<PROJ_DIR>/sysbuild
└── mcuboot.conf

Best regards,

Vidar