nrf5340 - netcore and cpuapp build and upload issue

[Sunil vignesh]

Hi, I am trying to get start nRF5340 and projects. In NCS 1.5.0 

i am following this link https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/ug_nrf5340.html

There i have seen

cpuapp

cpuappns

cpunetcore

I can't able to understand about secure and non-secure CPU

and I have get start the nRF5340DK with nrf_blinky so. I used cpuapp nrf5340dk

and created the netcore but while download the netcore hex. from SES but showing the error no input file

[Simonr]

Hi Sunil

Yes, nrfjprog and west are command line tools. 

There are examples for Flash storage and TWI in the Zephyr project, please check them out here.

Best regards,

Simon

[Sunil vignesh]

Hi Simonr, Still i am getting the same error on uploading  hci_rpmsg_nrf5340_netcore

I added the line CONFIG_BT_RPMSG_NRF53=y in prj.conf of peripheral_lbs

#
# Copyright (c) 2018 Nordic Semiconductor
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#
CONFIG_NCS_SAMPLES_DEFAULTS=y

CONFIG_BT=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEVICE_NAME="Nordic_Blinky"

CONFIG_BT_RPMSG_NRF53=y

# Enable the LBS service
CONFIG_BT_LBS=y
CONFIG_BT_LBS_POLL_BUTTON=y
CONFIG_DK_LIBRARY=y

CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

Step I have followed

1. I have selected peripheral_lbs project and board nrf5340dk_nrf5340_cpuapp

2. Build the project. (without doing dfu setup - the build hex is creating merged.hex) why its creating merged.hex only for peripheral_lbs

3. I found merged_CPUNET.hex in

D:\nRF5xx\NCS\v1.5.0\nrf\samples\bluetooth\peripheral_lbs\build_nrf5340dk_nrf5340_cpuapp\hci_rpmsg\zephyr

4. I have created hci_rpmsg_nrf5340_netcore project file inside the current peripheral_lbs solution from this link https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/ug_nrf5340.html

5. loaded the path $(ProjectDir)/hci_rpmsg/zephyr/merged_CPUNET.hex as like same link

6. merged_CPUNET.hex file is uploading only by doing with nrfconnect desktop

after that i upload the zephyr/merged.hex from the segger and the project working in the nrf5340 board

My questions are.

1.why its creating merged.hex only for peripheral_lbs project?

2. Is merged_CPUNET.hex is different for different projects ?

3. nrf5340 DK creating 3 comports what are they?