printk via RTT will not work, but printf does

[Pamela Keiles]

Hello there,

I have looked through all of the various other related questions, but still cannot resolve this issue. I am trying to use RTT versus a UART for the console. I have confirmed that the printf operation works, but not printk. I have looked at all the various configuration settings and stepped through the code, and the call branches to "log_printk" versus "vprintk". 

I have the following config statements defined in the project file:

CONFIG_CONSOLE=y

CONFIG_USE_SEGGER_RTT=y

CONFIG_RTT_CONSOLE=y

CONFIG_UART_CONSOLE=n

CONFIG_PRINTK=y

CONFIG_LOG_PRINTK=n

However in the output config file, the parameter CONFIG_LOG_PRINTK is always set as "y". Can you tell me why I cannot change this printk log parameter, it appears that this is stopping me from using printk to the RTT console.

Thanks,

Pam

[ovrebekk]

Hi Pam

Could you try to add the following config as well?

CONFIG_UART_RTT=y

This should fix the issue. 

Best regards
Torbjørn