RTT Output fails

[John]

I am using SDK V1.8 and have noticed that RTT output will run for a short time then stop.

Debug is still running because breakpoints can be set, just no printk output or other log data, it is happening regardless of which processor I am using say nRF9160 and nRF52840

RTT has been initiated withing prj.conf using : 

CONFIG_UART_CONSOLE=n
CONFIG_RTT_CONSOLE=y
CONFIG_USE_SEGGER_RTT=y

Any help would be vey much appreciated

[Hakon]

Hello,

do you have CONFIG_LOG_IMMEDIATE=y enabled in the prj.conf?

[John]

No it wasn't enabled and when I did enable it, I received the above error.

[John]

To try and help explain what I'm seeing, here is some log output.

It will start to drop messages and then give up sending any data to RTT.

Clock Pulse : 087F035BE5EE, 190
Relaying MAC : DFACE4DF75F9
TTL : 2
RSSI : 59
Turning RGB's Magenta:
Turning off RGB's :
Advert Status : Created
Actual Tx Power : 8
Advert Status : Set
Advert Status : Coded PHY
Advert Status : Started
Advert Status : Stopped
Turning RGB's Green:
Turning off RGB's :
Clock Pulse : 087F035BE5EE, 191
--- 1 messages dropped ---
Relaying MAC : DFACE4DF75F9
TTL : 2
RSSI : 62
Turning RGB's Magenta:
Turning off RGB's :
Advert Status : Created
Advert Status : Set
Advert Status : Coded PHY
Advert Status : Started
Advert Status : Stopped
Turning RGB's Green:
Turning off RGB's :
Duplicate Clock found, ignoring it :
______________________________________
Clock Pulse : 8C056CA1CACB, 191
Relaying MAC : DFACE4DF75F9
TTL : 2
RSSI : 58
Turning RGB's Magenta:
Advert Status : Started
--- 4 messages dropped ---
Advert Status : Stopped
Turning RGB's Green:
Turning off RGB's :
______________________________________
Clock Pulse : 5E5E92D906DD, 191
Relaying MAC : 52487E0E2DE3
TTL : 2
RSSI : 71
Turning RGB's Magenta:
Turning off RGB's :
Advert Status : Created
Advert Status : Set
Advert Status : Coded PHY
Advert Status : Started
Advert Status : Stopped
--- 28 messages dropped ---
Turning RGB's Green:
Turning off RGB's :
______________________________________
Clock Pulse : DFACE4DF75F9, 190
Relaying MAC : 8C056CA1CACB
TTL : 1
RSSI : 55
Turning RGB's Magenta:
Turning off RGB's :
Advert Status : Created
Advert Status : Set
Advert Status : Coded PHY
Advert Status : Started
Advert Status : Stopped

[John]

5025.prj.conf

prj.conf

[John]

I tried changing some values in log_backend_rtt.c and it improved things a bit, as in it failed a bit later than it usulayy did. However I'm most certainmly not comfortable trying to modify any part of the SDK.