Programming SoftDevice with Ulink-me

[Dani]

Good morning, I have designed a prototype based on nRF51822 device. Now, I want to program it with a demo software and I have the Ulink-me tool instead of Segger. From Keil, it is possible to program any application on the device by using the specified tool, but I do not know how to flash the Softevice, because nRFGo does not support this tool. Any suggestion? Best regards.

[Håkon Alseth]

Hi,

If you follow the steps in this link: www.keil.com/.../uv4_fl_hexdownload.htm

And input the softdevice hex file as the "name of executable", you should be able to flash the SoftDevice using any debugger that supports SWD. Note that you also need to setup the debugger with the "nRF51xxx External Connectivity Board" flash algorithm in "debugger settings" and check "Erase Full Chip".

A limitation by using a non-segger based debugger is that you do not have access to writing to UICR. UICR is used for DFU-based applications.

Cheers, Håkon

[Dani]

I tried already this operation but I always get "Error:Flash Download failed - Cortex-M0". Nevertheless, if I try to program another application (the one is in nAN-36), I have no problems. I suppose there should be anything more...

[Håkon Alseth]

Try choosing "nRF51xxx external connectivity board" as flash-algorithm, and also check "Erase Full Chip". The "normal" flash algorithm will not erase the chip if a SoftDevice has previously been loaded. I will update my original post to include this information.

[Dani]

Thank you so much! Now it is working!! Cheers, Dani.

[Stefan Birnir Sverrisson]

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