About Daul Bank DFU using uart

RE: About Daul Bank DFU using uart

Vidar Berg — Wed, 12 Jan 2022 09:57:12 GMT

Hi,

nrf_bootloader_flash_protect() uses the ACL — Access control lists module to change the read/write permissions for a given flash region. And as noted in the documentation, once protection is enabled, the only way to disable it again is through a reset.

RE: About Daul Bank DFU using uart

helen — Wed, 12 Jan 2022 09:45:38 GMT

1、I use keil to download app failed after I call nrf_bootloader_flash_protect（）to protect app area.Is there a function to unprotect the flash area?

2、Can the flash protected area be read and written through API or SWD after the flash area is protected?

RE: About Daul Bank DFU using uart

Vidar Berg — Mon, 13 Dec 2021 08:30:26 GMT

Hi,

The easiest approach is generally to perform DFU within the bootloader even with custom DFU transports. This also enables updates of the Softdevice and the bootloader itself.

We do have support for background DFU of the application (i.e. receiving the FW image while running the main app), but we do not have any official examples for it, only the demo sample I uploaded in this post: https://devzone.nordicsemi.com/f/nordic-q-a/46994/background-dfu-application-source-code/187534#187534

RE: About Daul Bank DFU using uart

helen — Fri, 10 Dec 2021 10:47:49 GMT

Due to the requirements of customer's protocol，The customer wants to use uart to receive the new firmware of .bin file in the ble_app_hrs_freertos, and then this .bin file is written to bank1.Is it feasible to implement dual bank dfu in this way?Is there such a sample?

RE: About Daul Bank DFU using uart

Vidar Berg — Thu, 02 Dec 2021 12:56:18 GMT

Hi,

You can enable the NRF_DFU_FORCE_DUAL_BANK_APP_UPDATES setting in your sdk_config header to make the bootloader only accept dual bank updates.

Best regards,

Vidar