nrf52832 SDK12 RTT Logger Module Issue

RE: nrf52832 SDK12 RTT Logger Module Issue

Tom — Fri, 25 Nov 2016 16:52:18 GMT

Looking at the source of SEGGER_RTT_printf.c, it seems to do what I want (it looks like it would print strings using the %s specifier properly) I'm not sure how to make it use SEGGER_RTT_printf though.

This tutorial: devzone.nordicsemi.com/.../ suggests that this should work without MicroLib (it says: uncheck "Use MicroLIB" and add SEGGER_RTT_printf.c).

I seem to be able to compile and run the project without even including SEGGER_RTT_printf.c with no difference at all. Placing breakpoints show that SEGGER_RTT_printf doesn't get called.

RE: nrf52832 SDK12 RTT Logger Module Issue

Petter Myhre — Fri, 25 Nov 2016 11:20:41 GMT

It does not work if MicroLib is disabled, so I guess this is a limitation of the standard library which is used when MicroLib is not used. No, I don't think SEGGER_RTT_printf.c is being used.

RE: nrf52832 SDK12 RTT Logger Module Issue

Tom — Fri, 25 Nov 2016 00:05:26 GMT

Thank you for your response and sorry for the delay in my reply.

I notice that MicroLib is enabled in ble_app_hrs. Does it still work for you if MicroLib is disabled? I get the same result as you if MicroLib is enabled (it works) but it stops working when I disable it.

This suggests to me that the SEGGER_RTT_printf.c isnt being used. I cannot use MicroLib in my project for various reasons (and I was under the impression I wouldnt need to use it)

RE: nrf52832 SDK12 RTT Logger Module Issue

Petter Myhre — Fri, 28 Oct 2016 12:09:30 GMT

It seems to be working here. I just took ble_app_hrs, set NRF_LOG_ENABLED 1 and NRF_LOG_BACKEND_SERIAL_USES_RTT 1 and put

char string_on_stack[] = "stack";
//nrf_log_push() copies the string into the logger buffer and returns address from the logger buffer
NRF_LOG_INFO("%s",nrf_log_push(string_on_stack));

in main(). Then I get:

 0> SDH:INFO:sd_ble_enable: RAM START at 0x20002128
 0> APP:INFO:Heart Rate Sensor Start!
 0> APP:INFO:Fast Adverstising
 0> APP:INFO:stack