device_get_binding device name of the device changes

[MakotoKoike]

What I want to do is do UART communication (UART_1) between nRF52840 and nRF9160.

From the nRF52840 side, uart_poll_out is OK,
From the nRF9160 side, uart_poll_out examined because it was not.

Binding is performed on both:
uart_dev = device_get_binding("UART_1");

z_impl_device_get_binding the device name of the device is stopped with a matching for statement,
On the nRF52840 side UART_1 remains intact.
On the nRF9160 side, UART_0 possible.

On the nRF 52840 side, if it continues, it becomes RNG.
Continuing on the nRF9160 side I2C_2 operation.

Is prj.conf set up wrong?

[MakotoKoike]

Add additional information.

NCS V1.4.2
Thingy91 1.4.0
Board name thingy91_nrf52840
thingy91_nrf9160ns

[Carl Richard]

Hi!

Thanks for reaching out. Are you getting any error messages from device_get_binding("UART_1") on the nRF9160? In addition to configuring the UART in prj.conf you must also enable it in thingy91_nrf9160ns.overlay file. You can see an example on how this is done in the boards folder lte_ble_gateway sample.

Best regards,
Carl Richard

[MakotoKoike]

Lte_ble_gateway the following six line to prj.conf, referring to the sample

UART_2 -> UART_1 changed to 4 locations

CONFIG_NRF_SW_LPUART=y
CONFIG_NRF_SW_LPUART_INT_DRIVEN=y
CONFIG_UART_1_ASYNC=y
CONFIG_UART_1_INTERRUPT_DRIVEN=n
CONFIG_UART_1_NRF_HW_ASYNC=y
CONFIG_UART_1_NRF_HW_ASYNC_TIMER=2

thingy91_nrf9160ns.overlay files in at_client folder and moved them.

uart2 -> uart1
Changed 4 pin numbers.

/ {
chosen {
zephyr,bt-uart=&lpuart;
};
};

&uart1 {
current-speed = <1000000>;
status = "okay";
tx-pin = <22>;
rx-pin = <23>;
/delete-property/ rts-pin;
/delete-property/ cts-pin;
/delete-property/ hw-flow-control;

lpuart: nrf-sw-lpuart {
compatible = "nordic,nrf-sw-lpuart";
status = "okay";
label = "LPUART";
req-pin = <24>;
rdy-pin = <25>;
};
};

As a result of moving, the system went down.

What's wrong with that?

[MakotoKoike]

UART moved on the nRF9160 side.

prj.conf:
CONFIG_UART_ASYNC_API=y
CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_UART_1_ASYNC=y
CONFIG_UART_1_INTERRUPT_DRIVEN=y

thingy91_nrf9160ns.overlay
/ {
chosen {
zephyr,console = &uart0;
zephyr,shell-uart = &uart0;
zephyr,uart-mcumgr = &uart0;
};
};

&uart1 {
current-speed = <1000000>;
status = "okay";
tx-pin = <22>;
rx-pin = <23>;
rts-pin = <24>;
cts-pin = <25>;
};

Thank you very much.

[Carl Richard]

Hi again!

Apologies for the delayed answer. Does it work now or are you still facing issues? I'll do some testing myself.

Best regards,
Carl Richard