Is the MBR params page necessary?

RE: Is the MBR params page necessary?

Palmer Huang — Mon, 28 Mar 2022 09:34:42 GMT

For now I'm keeping DFU bootloader support and trying to change settings.c

Thank you for your reply.

RE: Is the MBR params page necessary?

Vidar Berg — Mon, 28 Mar 2022 08:08:24 GMT

Hello,

I don't think it should be a problem to move the settings page. But to achieve this you would have to change the nrf_dfu_setting.c file to make it read and write data to and from the external flash, and that may force you to allocate an extra flash page to the bootloader.

Would it be sufficient to only remove the mbr params page? You only need this page if you need to support DFU of the bootloader itself.

RE: Is the MBR params page necessary?

Palmer Huang — Mon, 28 Mar 2022 07:09:29 GMT

Hello, Vidar

Can I put the settings page in external memory? I want to save some memory.

RE: Is the MBR params page necessary?

Vidar Berg — Mon, 28 Mar 2022 07:05:29 GMT

Hi,

The MBR cannot be relocated. It has to start at address 0x0 flash to become the first entry point after reset. The MBR params page must also be located in internal flash somewhere as the MBR cannot access external memory.

Best regards,

Vidar