Undefined reference to SEGGER_RTT_printf

[Gabe]

I am trying to use SEGGER_RTT_printf with SDK12 in eclipse.

I have added the appropriate lines to the makefile and SEGGER_RTT_WriteString works fine.

My Makefile lines:

SRC_FILES += \
  $(SDK_ROOT)/external/segger_rtt/RTT_Syscalls_GCC.c \
  $(SDK_ROOT)/external/segger_rtt/SEGGER_RTT.c \
  $(SDK_ROOT)/external/segger_rtt/SEGGER_RTT_printf.c \

INC_FOLDERS += \
  $(SDK_ROOT)/external/segger_rtt \

Thanks in advance for any help on this.

[Jørgen Holmefjord]

Hi,

You need to define NRF_LOG_USES_RTT = 1. If you look at the source code of SEGGER_RTT_printf.c, you can see that that code is embedded inside:

#if defined(NRF_LOG_USES_RTT) && NRF_LOG_USES_RTT == 1
      //Code
#endif /* NRF_LOG_USES_RTT == 1 */

Here is a similar thread.

Best regards,

Jørgen

[Gabe]

Thanks! I am not sure how I missed that.