NRF_ERROR_NO_MEM with SD_MBR_COMMAND_COPY_BL

[Cyril]

Hello,

I'm having an issue when trying to update the bootloader itself: NRF_UICR->NRFFW[1] returns 0xFFFFFFFF, which means I can't use the MBR command to swap bootloaders (see doc).

So I have a few questions: Why is this address not set by the bootloader provided in the SDK (at least the BLE one, I found some stuff done for the ANT bootloader)?

I guess I can reproduce the method used to set NRF_UICR->NRFFW[0] (bootloader address) to set this value when programming the MCU. But can I set NRF_UICR->NRFFW[1] from the bootloader or application code?

Thanks in advance

EDIT: I found some documentation to write UICR registers here. I'll start to work on it and write about a solution here.

EDIT 2: the BOOTLOADER_MBR_PARAMS_PAGE_ADDRESS is actually defined and used in bootloader_settings.c. Two sections called mbrParamsPage and uicrMbrParamsPageAddress are used to link some space to the right address. Then my issue comes from the link script...

[Cyril]

These lines were not in the linker script:

MEMORY
{
  [...]

  /** Location of mbr params page in flash. */
  MBR_PARAMS_PAGE (rw) : ORIGIN = 0x0007E000, LENGTH = 0x1000
  
  /** Location in UICR where mbr params page address is stored. */
  UICR_MBR_PARAM_PAGE(r) : ORIGIN = 0x10001018, LENGTH = 0x04
}

SECTIONS
{
  [...]
   
  /* Place the mbr params page in flash. */
    .mbrParamsPage(NOLOAD) :
  {
    
  } > MBR_PARAMS_PAGE
  
  /* Write the bootloader address in UICR. */
  .uicrMbrParamsPageAddress :
  {
    KEEP(*(.uicrMbrParamsPageAddress))
  } > UICR_MBR_PARAM_PAGE
}