Configuring RTT for Nordic thingy 52 connected to nrf5340's debug out

[muditsharmaa]

Hi,

I am current working with nrf connect SDK, nrf5340dk and 2 Nordic thingy 52s. I am trying to implement BLE mesh sensor client and server model on both the Thingys respectively and programming them via the nrf5340dk's debug out. I wish to look at the output of the mesh sensor client via RTT but I'm unable to do so.

I have added the following configuration parameters in the prj.conf file for enabling RTT:

ONFIG_UART_CONSOLE=n
CONFIG_HAS_SEGGER_RTT=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_RTT_CONSOLE=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_STRDUP_BUF_COUNT=20
CONFIG_LOG_STRDUP_MAX_STRING=8
CONFIG_LOG_DEFAULT_LEVEL=4

Can someone please help me configure RTT for nordic thingy 52?

Thank you!

[Carl Richard]

Hi!

Could you try to add "CONFIG_LOG=y" as well? I used the following prj.conf to successfully log over RTT via the nRF5340DK OB Debugger:

# Config logger
CONFIG_LOG=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_BACKEND_UART=n
CONFIG_RTT_CONSOLE=y

Best regards,
Carl Richard

[muditsharmaa]

Hi Carl,

thanks for the reply.

I also have the following config parameters in the prj.conf file. Still cant see the RTT output.

# General configuration

CONFIG_MAIN_STACK_SIZE=4096

CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096

CONFIG_FLASH=y

CONFIG_FLASH_MAP=y

CONFIG_NVS=y

CONFIG_SETTINGS=y

CONFIG_HWINFO=y

CONFIG_ASSERT=y

CONFIG_ASSERT_LEVEL=2

CONFIG_LOG=y

CONFIG_LOG_PRINTK=y

Can you please tell me how did you setup the jlink RTT viewer? Do you need to enable/disable VCOM via the jlink configurator? 

best regards,

Mudit Sharma

[Carl Richard]

Hi!

I only used the following settings:


Could you share your full prj.conf, so that I can see if there are any potential conflicts?

Best regards,
Carl Richard

[muditsharmaa]

Hey, 

Here is my proj.conf file.

# General configuration
CONFIG_MAIN_STACK_SIZE=4096
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096
CONFIG_FLASH=y
CONFIG_FLASH_MAP=y
CONFIG_NVS=y
CONFIG_SETTINGS=y
CONFIG_HWINFO=y
CONFIG_ASSERT=y
CONFIG_ASSERT_LEVEL=2
CONFIG_LOG=y
CONFIG_LOG_PRINTK=y

CONFIG_DK_LIBRARY=y
CONFIG_BT_MESH_DK_PROV=y

# Bluetooth configuration
CONFIG_BT=y
CONFIG_BT_COMPANY_ID=0x0059
CONFIG_BT_DEVICE_NAME="Mesh Sensor Client"
CONFIG_BT_L2CAP_RX_MTU=69
CONFIG_BT_L2CAP_TX_MTU=69
CONFIG_BT_L2CAP_TX_BUF_COUNT=32
CONFIG_BT_LL_SW_SPLIT=y
CONFIG_BT_OBSERVER=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_SETTINGS=y

# Disable unused Bluetooth features
CONFIG_BT_CTLR_DUP_FILTER_LEN=0
CONFIG_BT_CTLR_LE_ENC=n
CONFIG_BT_DATA_LEN_UPDATE=n
CONFIG_BT_PHY_UPDATE=n
CONFIG_BT_CTLR_CHAN_SEL_2=n
CONFIG_BT_CTLR_MIN_USED_CHAN=n
CONFIG_BT_CTLR_PRIVACY=n

# Bluetooth Mesh configuration
CONFIG_BT_MESH=y
CONFIG_BT_MESH_RELAY=y
CONFIG_BT_MESH_FRIEND=y
CONFIG_BT_MESH_ADV_BUF_COUNT=64
CONFIG_BT_MESH_TX_SEG_MAX=32
CONFIG_BT_MESH_RX_SEG_MAX=16
CONFIG_BT_MESH_PB_GATT=y
CONFIG_BT_MESH_GATT_PROXY=y

# Bluetooth Mesh models
CONFIG_BT_MESH_SENSOR_CLI=y

CONFIG_UART_CONSOLE=n
CONFIG_HAS_SEGGER_RTT=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_RTT_CONSOLE=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_STRDUP_BUF_COUNT=20
CONFIG_LOG_STRDUP_MAX_STRING=8

CONFIG_LOG_DEFAULT_LEVEL=4

I'm using the same configuration on the RTT viewer. 

Best regards,

Mudit Sharma

[Carl Richard]

Hi again!

I get a build error when trying your prj.conf dure to "CONFIG_HAS_SEGGER_RTT=y". Could you try to remove this, as well as building with a "Clean build folder" (SES) or "pristine" (command line).

Best regards,
Carl Richard

[muditsharmaa]

Hi Carl,

I followed your suggestion and I see output on the RTT viewer but I'm not seeing the printk() messages. 

On the RTT viewer I see the following output:

Can you kindly suggest what could be causing this and how to fix this?

thank you.