Detecting JTAG (SWDIO/SWDCLK) Connection

[jprofit]

Is there a way for firmware running on the nRF52 to detect the presence of a SEGGER (or other) SWD capable device? I've looked through all the nRF registers but couldn't find anything appropriate.

[RK]

( ( CoreDebug->DHCSR & CoreDebug_DHCSR_C_DEBUGEN_Msk ) != 0 )

ought to do the trick.

[jprofit]

Wow. Thanks very much. I am not up to speed on all that CMSIS offers. Guess I better seek out a tutuorial. There appears to be a ton of stuff there that the Nordic API docs don't discuss.

[awneil]

Stuff like this is purely in the domain of the ARM Cortex-M core and has nothing, really, to do with Nordic.

The best references are ARM's own materials:

http://infocentre.arm.com

https://community.arm.com/

And the excellent "Definitive Guide" books by Joseph Yiu:

store.elsevier.com/.../

store.elsevier.com/.../

[awneil]

Specifically, for the question at hand:

• infocenter.arm.com/.../index.jsp

• infocenter.arm.com/.../index.jsp

[FI]

Good stuff