How to generate init file(*Dat) for secure DFU OTA update?

[Nilesh Bhavsar]

Hi;

I am trying to secure DFU OTA. For that, i am using SDK12.2.0 and done with example file.

Now how to generate this .dat file itself.

Also explain each parameter of init file and how to set it.

[Nilesh Bhavsar]

Hello Sir,

Thank you for your valuable response.

As per your suggestion, i am trying to update hex file of ble_app_blinky_c program with SDK11. And I have done successfully OTA update file in my nRF51 Board.

But as of Now, every time i need to upload softdevice & bootloader file using nrfgo studio then after its updates hex file.

So, Is it possible bootloader and hex file using keil? Any additional changes required into the program?

Thanks

[Hung Bui]

You can use KEIL to flash the bootloader, just make sure nrfjprog was used in Keil for programming.

If you want to flash the application without doing OTA DFU, you can flash it directly with Keil, but since the bootloader will check a bootloader setting to know if there is a valid application is available. We need to overwrite the bootloader setting. Please have a look at section E in this FAQ.

[Nilesh Bhavsar]

Hello Sir,

Thank you for your quick response.

Can you explain me how to set nrfjprog in keil for programming?

[Hung Bui]

@Nilesh: please open the unmodified DFU bootloader in SDK v11, look for Project Option -> Utilities-> Use externalTool for Flash Programming. You can find it.

[Nilesh Bhavsar]

Hello Sir,

Greetings of the day!!

Thanks for your valueble suggestion in OTA now i am trying interface another device with UART of my nRF51 Dk board. For that i connect it with p9 and p11 (rx & tx pins).

Now how can i UART0 for communication?