How to pass bootloader version from bootloader to main application

RE: How to pass bootloader version from bootloader to main application

Aurele — Sun, 21 Jul 2019 10:19:20 GMT

I think it is better to link in both project a dedicated section in RAM that will be shared by app and bootloader

RE: How to pass bootloader version from bootloader to main application

Aurele — Sun, 21 Jul 2019 09:58:45 GMT

Hi,

I also want to pass information from my bootloader to my application. Since i know i cannot use UICR register i wanted to use these retention registers. But they are also used to pass information from app to the DFU (to start a DFU update for example). Is it safe enough to use it as you proposed ? Isn't there another solution to pass the bootloader version to my main application ?

Best regards,

Aurélien

RE: How to pass bootloader version from bootloader to main application

Juba Belgaid — Thu, 05 Oct 2017 09:54:17 GMT

hi shibshab , thank you for your reply.

RE: How to pass bootloader version from bootloader to main application

shibshab — Thu, 05 Oct 2017 06:49:04 GMT

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.

RE: How to pass bootloader version from bootloader to main application

Juba Belgaid — Wed, 04 Oct 2017 13:18:55 GMT

Custom bootloader (inspired from bootloader legacy sdk 9).

RE: How to pass bootloader version from bootloader to main application

Stian Røed Hafskjold — Wed, 04 Oct 2017 12:21:42 GMT

Which bootloader version are you using?

RE: How to pass bootloader version from bootloader to main application

Juba Belgaid — Tue, 03 Oct 2017 13:49:52 GMT

I'd like to passe bootloder version as argument for main function (int main(int argc, char *argv[])