Programm Sniffer Firmware to nRF51822

[Roger314]

Dear Developer Zone

I have searched now a lot in the Internet, mostly the say it's possible to reprogramm the Firmware of the nRF51822. I have such a chip and a JLink Debugger. Is it possible to download the sniffer .hex File via the JLink Debugger in the nRF51822? Which Software can do this? Are there any tutorials or how to's?

Thanks in Advance for Answers!

[MartinBL]

Hi

Yes, that should be possible. You can use nRFgo Studio (found here). Then you can download necessary .hex-files and user guides here and Wireshark here.

[Roger314]

Thanks for your answers. Now I just need to know where to connect which programming pin. As I have seen in the MDBT40 Datasheet, the Reset and SWDIO are connected together? Have you remapped the Reset Pin on your board? Do I Need to connect the TDI and TDO Pins?

Thanks a Lot in Advance!

[MartinBL]

I'm looking at this picture. It is pretty simple. The nRF51 has a shared nRESET/SWDIO pin as you can see in the Product Specification. So just connect SWDIO to SWDIO and SWDCLK to SWDCLK. Finally you need to connect VTref (aka VTG) on your debugger to Vdd on the MDBT40. This pin is measuring the voltage on your kit to determine if it is present or not. The pin is not meant to power your board. That's it. No need to connect TDI or TDO.

[Roger314]

Ah okay thanks. I could connect it now like this and programm the soft device. I just was really confused by the TDI and TDO Pins, but it works without. Thanks a lot and sorry for the stupid question.

[MartinBL]

Just happy to help! Please accept and close the case if you don't have more related questions.