RE: Questions about nrf5340 dfu.

Amanda Hsieh — Fri, 30 Jul 2021 06:58:09 GMT

It's currently being distinguished by the reset vector in the vector table. As the offset of the reset vector of the network core is offset by 0x01000000.

-Amanda H.

RE: Questions about nrf5340 dfu.

Jim — Thu, 29 Jul 2021 09:15:38 GMT

All upgrade packages are placed in the same area, how to distinguish between net core and app core upgrade packages?

RE: Questions about nrf5340 dfu.

Amanda Hsieh — Thu, 29 Jul 2021 07:26:00 GMT

Hi,

[quote user=""]1、Does nrf5340's application core and network core support external flash for firmware upgrade?[/quote]

nRF5340 can support DFU over external flash memory. See the similar case.

[quote user=""]2、When the application core is upgrading, what is the network core doing? On the contrary, when the network core is upgrading, what is the application core doing?[/quote]

When the application core is upgrading the network core is offline. When the network core is upgrading the application core is coordinating the update. (default behavior).

[quote user=""]3、The upgraded firmware of the application core is received in the B1 area of the application core. Where is the upgraded firmware of the network core located?[/quote]

The update of the application core is stored in the MCUBoot secondary slot.

The update of the network core is stored in the same slot as the application core update.

The implication of this is that you can only update 1 core at the time.

-Amanda H.