How to pass bootloader version from bootloader to main application

[Juba Belgaid]

Hi all,

I'd like to pass bootloader version (2bytes) from bootloader_util_reset function (bootloader) to the main of application. can help me to acheive that?

Thank you for your help in advance.

[shibshab]

You could use the retention registers, each of which is one byte.

#import "nrf_power.h"
...
NRF_POWER->GPREGRET  = bootloader_version && 0xff;
NRF_POWER->GPREGRET2 =bootloader_version >> 8 && 0xff; 
...

These are retained when performing a standard soft reset NVIC_SystemReset.

[Juba Belgaid]

hi shibshab , thank you for your reply.