How to enable nrf USB port as both bluetooth controller and as a serial port in nrf5340 dk board through flashing of hci_usb application

[Dileep Kumar]

Hi

 I am using nrf5340 dk board for my application development.  I want to configure the nrfUSB port as bluetooth controller and serial port

case 1:

 when iam trying to flash the bluetooth/hci usb application,then nrf USB port acting as a bluetooth controller by showing it as extra bluetooth controller through bluetoothctl command and it is not showing as serial port when iam checking with ls /dev command

case 2:

when i am trying to do flash the smp server with usb_cdc enabled hci_usb application ,then  nrf USB port it is not showing as bluetooth controller,but the serial port is enabled where the new images can uploaded through mcumgr.

I need a mechanism such that nrf USB connector in nrf5340 dk board should acts as a bluetooth controller and also acts as a serial port to upload the new images through smp server (mcumgr)

[Øivind]

Hi,

Could you try adding this to the application devicetree overlay:

/ {

    chosen {

        zephyr,console = &cdc_acm_uart0;

        };

};

 

&zephyr_udc0 {

    cdc_acm_uart0 {

        compatible = "zephyr,cdc-acm-uart";

    };

};

[Dileep Kumar]

Already from smp server- usb.overlay file copied in bluetooth hci-usb application and build the file using using usb.overlay file.

/ {
    chosen {
        zephyr,uart-mcumgr = &cdc_acm_uart0;
    };
};

&zephyr_udc0 {
    cdc_acm_uart0: cdc_acm_uart0 {
        compatible = "zephyr,cdc-acm-uart";
    };
};

[Øivind]

Could you try adding this line in the chosen node as well? For the main application. The cdc_acm_uart0 can be chosen for both uart-mcumgr and console.

/ {

    chosen {

        zephyr,console = &cdc_acm_uart0;

        };

};

If that doesn't help, please let me see your prj.conf and build/zephyr/.config files

[Dileep Kumar]

 I am not able to show another bluetooth controller in bluetoothctl after modifying it as you told.

prj.conf file is shown below

CONFIG_STDOUT_CONSOLE=y
CONFIG_GPIO=y
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_USB_DEVICE_INITIALIZE_AT_BOOT=n

CONFIG_BT=y
CONFIG_BT_HCI_RAW=y

CONFIG_USB_DEVICE_STACK=y
CONFIG_USB_DEVICE_PID=0x000B
CONFIG_USB_DEVICE_BLUETOOTH=y
CONFIG_USB_DEVICE_BLUETOOTH_VS_H4=n

# Workaround: Unable to allocate command buffer when using K_NO_WAIT since
# Host number of completed commands does not follow normal flow control.
CONFIG_BT_BUF_CMD_TX_COUNT=10

# Enable MCUmgr and dependencies.
CONFIG_NET_BUF=y
CONFIG_ZCBOR=y
CONFIG_CRC=y
CONFIG_MCUMGR=y
CONFIG_STREAM_FLASH=y
CONFIG_FLASH_MAP=y

# Some command handlers require a large stack.
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2304
CONFIG_MAIN_STACK_SIZE=2048

# Ensure an MCUboot-compatible binary is generated.
CONFIG_BOOTLOADER_MCUBOOT=y

# Enable flash operations.
CONFIG_FLASH=y

# Required by the `taskstat` command.
CONFIG_THREAD_MONITOR=y

# Support for taskstat command
CONFIG_MCUMGR_GRP_OS_TASKSTAT=y

# Enable statistics and statistic names.
CONFIG_STATS=y
CONFIG_STATS_NAMES=y

# Enable most core commands.
CONFIG_FLASH=y
CONFIG_IMG_MANAGER=y
CONFIG_MCUMGR_GRP_IMG=y
CONFIG_MCUMGR_GRP_OS=y
CONFIG_MCUMGR_GRP_STAT=y

# Enable logging
CONFIG_LOG=y
CONFIG_MCUBOOT_UTIL_LOG_LEVEL_WRN=y

# Disable debug logging
CONFIG_LOG_MAX_LEVEL=3

usbchanged.overlay

/*
 * Copyright (c) 2021 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: Apache-2.0
 */



/ {
    chosen {
        zephyr,uart-mcumgr = &cdc_acm_uart0;
    };
};

&zephyr_udc0 {
    cdc_acm_uart0: cdc_acm_uart0 {
        compatible = "zephyr,cdc-acm-uart";
    };
};

/ {

    chosen {

        zephyr,console = &cdc_acm_uart0;

        };

};

Build command used-

test@MUTSL03530:~/ncs/v2.4.2/zephyr/samples/bluetooth/hci_usb1$ west build -b nrf5340dk_nrf5340_cpuapp --pristine -- -DOVERLAY_CONFIG=overlay-cdc.conf -DDTC_OVERLAY_FILE=usbchanged.overlay -DCONFIG_MCUBOOT_SIGNATURE_KEY_FILE=\"/home/test/ncs/v2.4.2/bootloader/mcuboot/root-rsa-2048.pem\"