Can't get nRF52811 based sample projects to display on Segger J-Link RTT Viewer

[keegretupmoc]

Hi,

I am working on an FCC cert of our product which is nRF52811 based.  We are currently on SDK 2.0.0.  I have copied from the nrf samples bluetooth area the projects peripheral_uart and direct_test_mode and have been trying (in vain) to get them to send LOG_INF output to the RTT display.  Our main FW on nRF52811 sends the data fine but for some reason I can't get the other two test projects to do that.

I really need the direct_test_mode project to work that so I can test out the 52811 before we go to the RF Lab to check it out.  The peripheral_uart sample seems to be where our current pre-production FW originated from, so I have been trying to use that one to get the RTT display working.  I had to basically lobotomize it as far as BT is concerned since the 52811 is such a small SOC.

Here's the proj.conf from peripheral_uart:

#

# Copyright (c) 2018 Nordic Semiconductor

#

# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause

#

# Enable the UART driver

CONFIG_UART_ASYNC_API=y

CONFIG_NRFX_UARTE0=y

CONFIG_SERIAL=y

CONFIG_GPIO=y

# Make sure printk is printing to the UART console

CONFIG_CONSOLE=y

CONFIG_UART_CONSOLE=n

CONFIG_HEAP_MEM_POOL_SIZE=2048

#CONFIG_BT=y

#CONFIG_BT_PERIPHERAL=y

#CONFIG_BT_DEVICE_NAME="Nordic_UART_Service"

#CONFIG_BT_DEVICE_APPEARANCE=833

#CONFIG_BT_MAX_CONN=1

#CONFIG_BT_MAX_PAIRED=1

# Enable the NUS service

#CONFIG_BT_NUS=y

# Enable bonding

#CONFIG_BT_SETTINGS=y

#CONFIG_FLASH=y

#CONFIG_FLASH_PAGE_LAYOUT=y

#CONFIG_FLASH_MAP=y

#CONFIG_NVS=y

#CONFIG_SETTINGS=y

# Enable DK LED and Buttons library

#CONFIG_DK_LIBRARY=y

# This example requires more workqueue stack

CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

# Config logger

CONFIG_LOG=y

CONFIG_USE_SEGGER_RTT=y

CONFIG_LOG_BACKEND_RTT=y

CONFIG_LOG_BACKEND_UART=n

CONFIG_ASSERT=y

# hml extra stuff:

CONFIG_BT_NUS_SECURITY_ENABLED=n

CONFIG_LOG_MODE_IMMEDIATE=n

CONFIG_RTT_CONSOLE=y

The main configs that seem to be important for RTT display appear to be CONFIG_SERIAL, CONFIG_LOG, and CONFIG_USE_SEGGER_RTT.

I have the log.h setup in my main.c and have the other setups.  Here's a partial in main:

#define LOG_MODULE_NAME peripheral_uart

LOG_MODULE_REGISTER(LOG_MODULE_NAME, LOG_LEVEL_INF);

void main(void)

{

while(true) {

k_msleep(1000);

LOG_INF("EXECUTING MAIN AFTER WAITING 5 SECONDS");

};

Any help would be appreciated.

h.

[keegretupmoc]

Hi Kazi,

Yes, it's very perplexing.  I finally just gutted my working project (RTT displays) and put the direct_test_mode code in it and kind of got it working.  Hopefully well enough.

It seems to be the SOC setup we have I guess.  Something in my project that is needed for even the simple projects to work on.

Since I am past that with my workaround you can close out the ticket.

Thanks,

h.