Trying to add the capability of USB DFU (buttonless, because I forgot to have a button for it) to my custom board (nrf52840, MS88SF31 module). Reading about this process from different places gives different answers and I can't quite wrap my head around it. I have made a custom board and managed to program a LED to blink. For programming I used openocd and ST-link 2.
If anyone can lead me in the right direction, help would be appreciated. I have read the academy course on it, and some documentation as well but a lot of the terminology is lost on me.
Biggest questions I have with it are:
1. Where do I get the MCUBoot? I have managed to build one through visual studio code with my application, but it didn't seem to work, I don't really know how to test it other than connect the board through USB and look at NRF Connect for Desktop, Programmer. I have also seen a lot of mentions of pca10040 pca10100 etc., but I don't understand what am I suppose to do with the stuff in those folders. All the file types are completly different from the ones that I have seen before.
2. If I manage to get the USB DFU to work, can I program my board through NRF Connect for Desktop, Programmer or do I need something else?
3. How much, if at all, do I need to change the bootloader? As I understand, I need to add a few lines to make the DFU USB work, but is there something else I need to do aswell? I have read about mcumgr, which I don't really understand the purpose of I this context.
Thanks in advance!
