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?

[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

[Hamada888]

hello

i am trying to do the same (uart between nrf9160 and nrf52840 on thingy 91)

I started with coping lpuart-code to asset tracket code on nrf9160ns

i added this changes to prj file:

CONFIG_UART_ASYNC_API=y
CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_UART_1_ASYNC=y
CONFIG_UART_1_INTERRUPT_DRIVEN=y

my overlay file is:

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>;
};

in my main.c:

err = uart_callback_set(uart0_dev, uart_callback, (void *)uart0_dev);

__ASSERT(err == 0, "Failed to set callback");

void main(void)
{
LOG_INF("Asset tracker started");


const struct device *uart0_dev;

k_msleep(1000);
uart0_dev = device_get_binding("UART_1");
//lpuart = device_get_binding("LPUART");
__ASSERT(uart0_dev, "Failed to get the device");

if (IS_ENABLED(CONFIG_NRF_SW_LPUART_INT_DRIVEN)) {
interrupt_driven(uart0_dev);
} else {
async(uart0_dev);
}

I get Failed to set callback, can you help me to fix it?