DFU without a transport layer

[Rob Philip]

I have a system that will have multiple ways of doing DFU. BLE, as normal, UART under special circumstances, and a "no transport" way. In the latter I will have transported the .dat and .bin files to the target using a legacy protocol.

With the files available on NOR flash, I'm trying to figure out how to go about using the DFU procedure to write them to program flash and start executing. 

I'm using SDK version 15.0 (or soon 15.2)

This has been mentioned peripherally in other devzone issues, but only with hints about using the "block" functions and NRF_DFU_OP_OBJECT_EXECUTE but without any more explicit hints about how to go about doing this.

Any help would be welcome. 

[Rob Philip]

I resolved this issue and this ticket can be closed.

[brooksp]

Hey Rob, I think I'm trying to do something similar to your original post. Did you find out how to send blocking NRF DFU requests, or did you go a different route?

Thanks!

[Rob Philip]

I ended up reverse engineering what happens with the serial DFU, and then emulated that. My image was on a file system and so I'd read a block, send it to the DFU interface, wait until I got a response and then read & send another block.

I don't work for that company any more and don't have the code available to me, unfortunately, or I'd be more specific. 

[brooksp]

Thanks for replying, Rob. I totally understand, and I'll look into reverse engineering some more. I'm specifically trying to figure out the "Wait until I get a response" part.