Hi there,

 

On the board acting as a Host (i.e. the one that is running the app, not the on running hci_uart) you need to add a chosen node for  zephyr,bt-uart, like here:

 

https://github.com/zephyrproject-rtos/zephyr/blob/main/boards/arm/hexiwear_k64/hexiwear_k64.dts#L29

 

More about zephyr chosen nodes here:

 

https://docs.zephyrproject.org/latest/reference/devicetree/api.html#id2

 

Carles

 

 

From: users@... <users@...> On Behalf Of Anis via lists.zephyrproject.org
Sent: 29 March 2022 23:04
To: users@...
Subject: [Zephyr-users] help with BLE HCI dual chip setup

 

Hello,
I am testing the dual chip configuration of the BLE.
I am using two nrf52dk boards and I would like to setup one as host and one as controller.
I am following the "96Boards Carbon nRF51" sample as a reference.
my goal is to use a uart for the connection between the two boards.
I was able to build the controller part of the code but failed on the host.
I am testing with the peripheral sample project.
in the boards folder I added a .conf and .overlay files for the nrf52dk.
my nrf52dk_nrf52832.overlay file is as follows

&uart0 {
    compatible = "nordic,nrf-uart";
    current-speed = <1000000>;
    status = "okay";
    hw-flow-control;
    tx-pin = <5>;
    rx-pin = <4>;
    rts-pin = <7>;
    cts-pin = <6>;
};

my nrf52dk_nrf52832.conf file is as follows

CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n

 

CONFIG_SERIAL=y

CONFIG_UART_CONSOLE=n

CONFIG_USE_SEGGER_RTT=y

CONFIG_RTT_CONSOLE=y

CONFIG_LOG=y

CONFIG_LOG_DEFAULT_LEVEL=4

CONFIG_SPI_LOG_LEVEL_DBG=y

CONFIG_LOG_BACKEND_RTT=y

I added the following to prj.conf

# Incresed stack due to settings API usage

CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

 

CONFIG_BT=y

CONFIG_BT_DEBUG_LOG=y

CONFIG_BT_SMP=y

CONFIG_BT_SIGNING=y

CONFIG_BT_PERIPHERAL=y

CONFIG_BT_DIS=y

CONFIG_BT_ATT_PREPARE_COUNT=5

CONFIG_BT_BAS=y

CONFIG_BT_HRS=y

CONFIG_BT_PRIVACY=y

CONFIG_BT_DEVICE_NAME="Zephyr Peripheral Sample Long Name"

CONFIG_BT_DEVICE_APPEARANCE=833

CONFIG_BT_DEVICE_NAME_DYNAMIC=y

CONFIG_BT_DEVICE_NAME_MAX=65

 

CONFIG_BT_KEYS_OVERWRITE_OLDEST=y

CONFIG_BT_SETTINGS=y

CONFIG_FLASH=y

CONFIG_FLASH_PAGE_LAYOUT=y

CONFIG_FLASH_MAP=y

CONFIG_NVS=y

CONFIG_SETTINGS=y

 

# added these to enable the BLE HCI config

CONFIG_GPIO=y

CONFIG_SERIAL=y

CONFIG_UART_INTERRUPT_DRIVEN=y

CONFIG_BT_HCI=y

CONFIG_BT_CTLR=n

the project doesn't build. it gives the following error

error: '__device_dts_ord_DT_CHOSEN_zephyr_bt_uart_ORD' undeclared (first use in this function)

 

any advice on how to fix this or how to get get a dual chip setup to work would be very appreciated.

Thanks