JLink hangs after reset from nrfjprog v10.10+

RE: JLink hangs after reset from nrfjprog v10.10+

user102720 — Fri, 07 Jan 2022 15:24:29 GMT

Nice!
I can confirm that resetting in jlink commander works.

Thank you!

RE: JLink hangs after reset from nrfjprog v10.10+

user4240 — Fri, 07 Jan 2022 12:38:17 GMT

I see the same now when testing here. That is, I stop getting RTT messages as soon as I peform the --debugreset. It does however work when I instead perform a softreset from Jlink commander (JLinkExe). Can you try the same?

Resetting in jlink commander:

> r /* reset and halt */

> g /* Start execution */

I will report this issue internally in the meantime.

RE: JLink hangs after reset from nrfjprog v10.10+

user102720 — Thu, 06 Jan 2022 13:05:51 GMT

Thanks for the answer, Vidar.

I've tested with --debugreset now and also with --hardreset (although this one should not work based on your info on power precautions) on v10.15.1 with JLink 7.50a, 7.58b and 7.60b, and it didn't worked either.

RE: JLink hangs after reset from nrfjprog v10.10+

user4240 — Thu, 06 Jan 2022 10:00:10 GMT

Hi,

Have you tried to use --debugreset instead? nrfjprog is actually supposed to make the chip exit debug interface mode after a --reset to avoid excessive power consumption after programming (base current in debug mode is ̃around 3 mA). There was however a bug in nrfjprog 10.9 that prevented it from powering down the debug interface, so that would explain why RTT kept working after reset earlier.

Best regards,

Vidar