DFU of softdevice or softdevice+bootloader makes iOS app crash

[peterh]

sdonly.zipsoftdevice.zipCustom board with a nRF51422, SD 310 rev 2.0.0, nRF Toolbox rev 2.4, iOS 8.4

When trying to use the DFU app to update my softdevice and/or the combined package with softdevice+bootloader the application crashes/quits without errormessage, warnings or anything.

I can update the application or the bootloader successfully, but as soon as the SD is involved I get nowhere in a hurry.

Any good ideas as to what goes wrong?

The zip file is generated from s310_nrf51422_2.0.0_softdevice.hex and my own bootloader.hex, by peeling of lines as described in the howto, running hex2bin, combining them with copy /b and thus obtaining the crc using crc.exe. Finally my shot at a .dat is zipped together with the original .hex files.

[Hung Bui]

Could you explain why you set sq_req of 79 (0x4F) and 90 (0x5A) ? The S310 v2.0.1 has ID of 93 (0x5D).

When you are not so sure about the softdevice version, you should use 0xfffe. This allows all softdevice version.

I attached here the .zip file I used and tested with the bootloader from SDK v7.2

softdeviceS310v201.zip

[peterh]

What if I want to update the bootloader only. Can that be done, or do I have to bundle the operation with the softdevice update (and therefore wait for your solution)?

Problem is that I need to make own bootloader in order to keep application data in flash across firmware updates, and that it will take me at least a couple of hours pr device to access them by jtag. OTA would be so much nicer ;-)