How to stream accelerometer to Jlink VCOMport?

[Jason]

My accelerometer readings appear in my segger embedded studio "Debug Terminal" window.

It looks like this.

I want to stream the data via COM port to this "serial oscilloscope" https://x-io.co.uk/serial-oscilloscope/

I have enabled VCOM in the J-LINK configurator. It's connected with SWD. I have connected pins 5 and 17 on the jlink port to loop back TX and RX.

My VCOM shows as COM5  in my device Manager

How do I send text to the COM port?

I've tried using  

  printf("LIS3DH_SaveSample new_sample = %d, %d, %d\n", new_X, new_Y, new_Z);
NRF_LOG_INFO("LIS3DH_SaveSample new_sample = %d, %d, %d\n", new_X, new_Y, new_Z);

but nothing appears at the COM port. I only see the output in the debug Terminal

[Sigurd]

Hi,

Are you using NRF_LOG?

Try setting UART_CONFIG_LOG_ENABLED to 1 in sdk_config.h

[Jason]

Hi Thanks for your help,

OK I have now set UART_CONFIG_LOG_ENABLED to 1 and I try to log using  

NRF_LOG_ERROR("%d, %d, %d\n", new_X, new_Y, new_Z);

But I dont see anything in the COM port 

I have attached my sdk_config.h to try to save time.

7455.sdk_config.h

[Sigurd]

Jason said:

I have attached my sdk_config.h to try to save time.

Jason said:

OK I have now set UART_CONFIG_LOG_ENABLED to 1 and I try to log using  

 I see now that the correct config was NRF_LOG_BACKEND_UART_ENABLED, so change NRF_LOG_BACKEND_UART_ENABLED to 1, and set NRF_LOG_BACKEND_UART_TX_PIN to the pin your using for UART TX

Snippet:

// <e> NRF_LOG_BACKEND_UART_ENABLED - nrf_log_backend_uart - Log UART backend

//==========================================================

#ifndef NRF_LOG_BACKEND_UART_ENABLED

#define NRF_LOG_BACKEND_UART_ENABLED 1

#endif

// <o> NRF_LOG_BACKEND_UART_TX_PIN - UART TX pin 

#ifndef NRF_LOG_BACKEND_UART_TX_PIN

#define NRF_LOG_BACKEND_UART_TX_PIN 31

#endif

 

[Jason]

It's a custom board without UART pins. I only have SWDIO and SWDCLK. I debug and program using SWD via JLink. My debug statement appear in the Segger Embedded studio debug terminal but I wanted to reroute these to the VCOM. 

Is this not possible?

[Jason]

I think I misunderstood what this is for. I thought I could send text via SWD to VCOM

https://wiki.segger.com/J-Link_Virtual_COM_Port#VCOM_on_J-Link

Sorry to waste your time. Thanks for your help