Access to internal flash for erasing/writing from the code, runs from other page of the flash

[Mikhail P]

Hi!

I've try to made bootloader/recovery application that should to replace existing run-time application of the device. The F/W file for replacement placed in external flash memory.

The question: is it possible to burn few pages of internal flash from code that runs from other page of same flash?

[Vidar Berg]

Hi,

You can erase a flash page as long as you are not running your code from the same page in flash. E.g, you can erase page at address 0x7F000 if your code is running from address 0x0. You may use our bootloader as reference. nrf_bootloader_fw_activation.c::image_copy for instance. 

[Mikhail P]

Thank you!