How does one connect Segger J-Link Base to nordic nrf52840

RE: How does one connect Segger J-Link Base to nordic nrf52840

bjorn-spockeli — Mon, 14 May 2018 06:49:54 GMT

LuckyGinger: Yes, the adapter and the cable from Adafruit will work just as well as the adapter from Segger.

You set the Optimization Level by right-clicking the Project in the Project Explorer, then select Edit Options. This will open the Options Window, where you can set the settings for either the Release build or the Debug build, or you can alter the Common settings that are inherited by the Release and Debug build configurations. You'll find the Optimization Level under Code -> Code Generation -> Optimization Level

RE: How does one connect Segger J-Link Base to nordic nrf52840

LuckyGinger — Wed, 09 May 2018 14:45:40 GMT

I am currently using Segger Embedded Studio. I haven't found where to disable code optimization quite yet but I am still looking.

6 HW breakpoints would be loads better than two, especially if I can view the local variables.

Not to sound cheap, but do you know if together these two options will work?

https://www.adafruit.com/product/2094

https://www.adafruit.com/product/1675

Thank you for your help!

RE: How does one connect Segger J-Link Base to nordic nrf52840

bjorn-spockeli — Wed, 09 May 2018 10:33:02 GMT

Which IDE are you using? Segger Embedded Studio or Keil uVision? Have you disabled code optimization when you're debugging, otherwise you might not be able to view all the local variables when halting the CPU.

As far as I know the nRF52840 has 6 HW breakpoints.

There is an extensive Logging module in our SDK that supports multiple backends, RTT, UART and a Command-Line Interface(CLI).

You need a J-Link 9-Pin Cortex-M Adapter, available here from Segger or here from Digikey. The 9-pin 0.05'' Samtec FTSH connector can then be connected to the Debug In header(P18) on the nRF52840 DK