How do I add RTT debugging to blinky example in Embedded Studio

RE: How do I add RTT debugging to blinky example in Embedded Studio

Eric Navarrete — Fri, 03 Apr 2020 19:36:57 GMT

Thank you very much Karl, that has helped me get it working!

I will need to keep reading through all the infocenter pages on the logger module to really understand it, but this is a good first step.

I will modify the code to use UART now for some practice.

Thanks again

-Eric

RE: How do I add RTT debugging to blinky example in Embedded Studio

Karl Ylvisaker — Fri, 03 Apr 2020 11:33:21 GMT

Hi Eric,

I took your code, reverted to the original blinky sdk_config.h(so you could see exactly what needs to be added), and added the following:

#ifndef NRF_LOG_ENABLED
#define NRF_LOG_ENABLED 1
#endif

#ifndef NRF_LOG_DEFERRED
#define NRF_LOG_DEFERRED 0
#endif

#ifndef NRF_LOG_BACKEND_RTT_ENABLED
#define NRF_LOG_BACKEND_RTT_ENABLED 1
#endif

#ifndef NRF_LOG_BACKEND_RTT_TEMP_BUFFER_SIZE
#define NRF_LOG_BACKEND_RTT_TEMP_BUFFER_SIZE 64
#endif

#ifndef NRF_LOG_BACKEND_RTT_TX_RETRY_DELAY_MS
#define NRF_LOG_BACKEND_RTT_TX_RETRY_DELAY_MS 1
#endif

#ifndef NRF_LOG_BACKEND_RTT_TX_RETRY_CNT
#define NRF_LOG_BACKEND_RTT_TX_RETRY_CNT 3
#endif

#ifndef SEGGER_RTT_CONFIG_BUFFER_SIZE_UP
#define SEGGER_RTT_CONFIG_BUFFER_SIZE_UP 512
#endif

#ifndef SEGGER_RTT_CONFIG_MAX_NUM_UP_BUFFERS
#define SEGGER_RTT_CONFIG_MAX_NUM_UP_BUFFERS 2
#endif

#ifndef SEGGER_RTT_CONFIG_BUFFER_SIZE_DOWN
#define SEGGER_RTT_CONFIG_BUFFER_SIZE_DOWN 16
#endif

#ifndef SEGGER_RTT_CONFIG_MAX_NUM_DOWN_BUFFERS
#define SEGGER_RTT_CONFIG_MAX_NUM_DOWN_BUFFERS 2
#endif

#ifndef SEGGER_RTT_CONFIG_DEFAULT_MODE
#define SEGGER_RTT_CONFIG_DEFAULT_MODE 0
#endif

I also included the source files nrf_log_backend_rtt, nrf_log_default_backend and nrf_log_backend_serial from components/libraries/log/src, as well as the segger_rtt files from external/segger_rtt(along with adding its include path ../../../../../../external/segger_rtt to the end of the project included directories - options->preprocessor->User Included Directories). You can find this setting by right clicking on the project name, at the top of your project directory and selecting options.

These files seem to be included in your project in your screenshots, but not when I opened the project files you sent earlier.

The result from this is "Invert!" being printed in the RTT terminal along with the leds toggling like in the blinky example, the RTT output is seen in the included image.

I recommend that you use the program "J-link RTT Viewer" for viewing RTT messages, instead of the built in SES debug window. I find the debug window often behaves unexpectedly. Mind you that you may not have J-link RTT Viewer open at the same time as the debug terminal in SES, that will not work.

If you would like to use the UART backend instead, take a look at an example using this, and see if you can change the code to use UART instead - I recommend this exercise!

I'll include the modified code in its entirety also, so that you may take a look.
devzone.nordicsemi.com/.../my_5F00_code.zip

Sorry for my late reply by the way, I had some issues with my network this morning.

Hope you have a great weekend Eric, and please let me know if you should have any more questions and issues in the future! :)

Best regards,
Karl

RE: How do I add RTT debugging to blinky example in Embedded Studio

Eric Navarrete — Thu, 02 Apr 2020 02:53:59 GMT

Thanks for your help again.

I am using Nrf5 SDK 16.0.0. and Segger embedded studio V4.52

I tried adding NRF_LOG_INIT(NULL) to the start of main() but still nothing shows in debug window or RTT viewer. I have tried using UART instead of RTT, so I have:

-Added nrf_drv_uart.c, nrfx_uart.c, nrfx_uarte.c to the project in embedded studio.

-Enabled NRF_LOG_BACKEND_UART_ENABLED in sdk_config.h

-Disabled NRF_LOG_BACKEND_RTT_ENABLED in sdk_config.h

Unfortunately after those steps, the project doesn't build. The error is:

Building ‘blinky_pca10056_mbr’ from solution ‘blinky_pca10056_mbr’ in configuration ‘Release’
1> Compiling ‘nrf_log_str_formatter.c’
2> Compiling ‘nrf_log_frontend.c’
3> Compiling ‘nrf_log_backend_rtt.c’
4> Compiling ‘nrf_log_backend_serial.c’
5> Compiling ‘nrf_log_backend_uart.c’
6> Compiling ‘nrf_log_default_backends.c’
7> Compiling ‘boards.c’
8> Compiling ‘app_error_weak.c’
9> Compiling ‘app_error_handler_gcc.c’
10> Compiling ‘nrf_atomic.c’
11> Compiling ‘nrf_fprintf.c’
12> Compiling ‘nrf_balloc.c’
13> Compiling ‘nrf_fprintf_format.c’
14> Compiling ‘nrf_memobj.c’
15> Compiling ‘nrf_ringbuf.c’
5> C:\Nordic\nRF5_SDK_16.0.0_98a08e2\components\libraries\log\src\nrf_log_backend_uart.c:45:10: fatal error: nrf_drv_uart.h: No such file or directory
5> compilation terminated.
16> Compiling ‘nrf_strerror.c’
17> Compiling ‘nrfx_atomic.c’
Build failed

I checked C:\Nordic\nRF5_SDK_16.0.0_98a08e2\components\libraries\log\src and indeed there is no nrf_drv_uart.h file there. That file is actually located at C:\Nordic\nRF5_SDK_16.0.0_98a08e2\integration\nrfx\legacy

So I'm not quite sure how to fix that error

Thanks

-Eric

RE: How do I add RTT debugging to blinky example in Embedded Studio

Karl Ylvisaker — Wed, 01 Apr 2020 14:44:39 GMT

Hello,

Sorry, I did not see this in when initially reading your ticket. I misunderstood your question.

[quote user=""] I apologise for this very basic question[/quote]

No problem at all, you do not need to apologize. I am happy to help!

Which SDK version are you working with?

From you code, I immediately notice that you do not call NRF_LOG_INIT(NULL), could you add this to the beginning of your main function, and see if this resolves your issue?
Your includes and added project source files looks correct.

If this does not solve your problem, I will build your code tomorrow and take a look!

If you would like to read more about the Logger module you could do so here, and its API reference can be found here. Here can see how to use different logger debug levels to see different output during your development - such as using NRF_LOG_DEBUG printouts, which are not even compiled on the lower NRF_LOG_LEVELs.
You could also use the non-RTT options, such as UART(then you can see it using a serial monitor), by enabling them instead of RTT :)

Best regards,
Karl

RE: How do I add RTT debugging to blinky example in Embedded Studio

Eric Navarrete — Tue, 31 Mar 2020 01:32:55 GMT

Thank you for your response, I have seen that tutorial, however I am using Segger embedded studio. The tutorial only mentions Keil, also the RTT files it says to download don't include syscalls for Segger embedded studio, so I thought it wouldn't work. As for what I have done myself, I have tried using the SES built in debug window, Segger RTT viewer, and a Serial monitor, but nothing shows. The code builds fine in SES. Thanks

RE: How do I add RTT debugging to blinky example in Embedded Studio

Karl Ylvisaker — Mon, 30 Mar 2020 08:39:40 GMT

Hello,

Thank you for including your code.
Have you seen the Debugging with RTT tutorial?
If you have not, I highly recommend taking a look at it first. Be advised that since SDK v12.0.0 RTT is built into the NRF_LOG module.

If you have seen the tutorial, and made sure you've followed the steps, please let me know where it does not perform as expected. You say nothing shows in your debug terminal - have you checked with a serial monitor as well?

Best regards,
Karl

RE: How do I add RTT debugging to blinky example in Embedded Studio

Eric Navarrete — Sun, 29 Mar 2020 14:15:43 GMT

devzone.nordicsemi.com/.../my_5F00_code.zip

I forgot to add my code, so here it is if that helps at all