Twim controller error when connected to JLink.

[Yida]

Platfom:
- nRF52840-DK
- Ubuntu 20.04
- Zephyr Ncs Vscode
Application:
- Read register data from ICM42605(i2c mode)
Problem:
When connected to JLinkRTTViewer and output the log,i2c_nrfx_twim seems dont work as support.
[00163515] <err> i2c_nrfx_twim: Error 0x0BAE0001 occurred for message 3.
It's a NACK error, but from the logic wave, controller send a stop flag before an ACK(see picture for details).

When disconnected to JLinkRTTViewer,everything goes well.
Thanks for any help.

[Jared]

Hi,

Could you share the trace from the logical analyzer when the J-link is disconnected so I could compare the two? I don't see any immediate reasons of why you're getting errors when the J-link is connected versus when it's disconnected.

regards

Jared 

[Yida]

Thanks for your reply.
I post the trace with with annotation below.The data can be read normally within a short period of time after the JLink-connection, but an error will occur immediately.

[Jared]

Hi,

Seems like the issue might be caused by the reset setting the slave to the wrong state? Some users have reported similar issues here. 

regards

Jared