Issue with merge file when uploaded over BLE dfu

[BIPIN]

Hi,

I have developed two different application on nRF51822 with two different location. One is start from 0x1D000 with max size of 16 KB and another start from 0x21000 with max size of 60 KB. I have merge two hex file generated from these two application using mergehex. my first application jump on second application depending on some condition.

When i download this merge file using nRFgo studio then it works fine. Application 1 jump on application2 successfully.

But When i upload this merge file over BLE DFU using nRF Toolbox, then only Application 1 work ok but it doesn't jump on Application 2.

when I have checked from keil memory window during debug then i found that nRF Toolbox has uploaded merge file without filling gap by 0xFF in between hex file1 and 2.

Is any solution is available to fill used space by 0xFF for hex file with max size?

Thanks Bipin Patel

[Wojtek]

So, do i understand correctly? you have one hex file that starts with (just for example) 0x0000 and size 0x1000, and other one that starts on 0x2000 with size 0x1000. So in bin file there should be: 0x0000-0x1000(app1), 0x1000-0x2000 (0xFFs), 0x2000-0x1000 (app2) but you have bin that looks like 0-0x1000(app1), 0x1000-0x2000 (app2) which is wrong, right?

Have you tried generating bin file in nrfutils? Maybe try preparing .bin file manually? (just add proper amount of 0xFFs in some hex editor?) I think it is problem with your .bin file generator, not nrf toolbox itself. There may also be (i don't know - haven't checked that) bug in nrfutils if you are using it to generate .bin. When generating file for use with bootloader, it cuts out part of bin which is responsible for UICR register which is quite far in memory, just after lots of 0xFFs. I think this feature MAY be problem here.