How to make app_valid_setting_apply.hex

[c cook]

I want to create a single hex file that I can use to program the SD, DFU, and my application. I know I can use mergehex.exe to merge these files. To make it so that the bootloader knows that there is a valid application, according to this thread, I also need to include a 4th hex the thread named "app_valid_setting_apply.hex" which tells the DFU that there is a valid application.

How do I create this 4th file, and make sure the addresses and data are correct?

Thanks, Clint

[Stefan Birnir Sverrisson]

Hi

As the thread you mention states, you can directly use the "app_valid_setting_apply.hex" file by merging it with your softdevice+bootloader+application hex file and that should make your application valid.

If you want to figure out how to create it manually, then you would need to look at the basics of the intel hex format. If you open the "app_valid_setting_apply.hex" file in notepad you can see it contains only three lines of code.

Additionally, this thread explains something about what the "app_valid_setting_apply.hex" file actually does in order make the application valid.

[c cook]

I understand what the app_valid_setting_apply.hex file is doing. I also understand the intel hex format. My question is - How to can I confirm or learn the address of the app valid bit or the address of the CRC check? I want to know how to find their addresses, so if the DFU changes (and the address for these two parameters change) I can generate my on app_valid file.