Is the MBR params page necessary?

[Palmer Huang]

Hi,

I want to move the MBR params page to the external flash, is it feasible?

I saw in this that if you use the MBR command to move the bootloaders, you must keep the MBR parameter page?

If MBR  params page is required, can I put the settings page in external flash?

Note: I used the secure_bootloader of SDK17.1.0

[Vidar Berg]

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

[Palmer Huang]

Hello, Vidar

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

[Vidar Berg]

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.

[Palmer Huang]

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

Thank you for your reply.