NRF9160 DK failed to add another UART to BLE NUS example

RE: NRF9160 DK failed to add another UART to BLE NUS example

V1incentC — Fri, 16 Feb 2024 15:02:32 GMT

This was it. Now it's working. Thank you!

RE: NRF9160 DK failed to add another UART to BLE NUS example

Håkon Alseth — Fri, 16 Feb 2024 14:53:27 GMT

Hi,

Looks like CONFIG_UART_3_ASYNC is being n-selected as CONFIG_UART_3_INTERRUPT_DRIVEN is y-selected.

Can you explicitly set CONFIG_UART_3_INTERRUPT_DRIVEN=n as well?

Kind regards,

Håkon

RE: NRF9160 DK failed to add another UART to BLE NUS example

V1incentC — Fri, 16 Feb 2024 14:41:29 GMT

I tried setting CONFIG_UART_3_ASYNC too...
I appended the config file.

devzone.nordicsemi.com/.../full_5F00_config.txt

RE: NRF9160 DK failed to add another UART to BLE NUS example

Håkon Alseth — Fri, 16 Feb 2024 13:33:44 GMT

Hi,

If we look at the failing function in detail, ie. uart.h:

https://github.com/nrfconnect/sdk-zephyr/blob/v3.4.99-ncs1-2/include/zephyr/drivers/uart.h#L1246

It does require certain settings for UART3, like "CONFIG_UART_3_ASYNC" is set. Could you share the full .config file from build-folder/zephyr/.config ? You can rename it to .txt if you have problems uploading it here.

Kind regards,

Håkon

RE: NRF9160 DK failed to add another UART to BLE NUS example

V1incentC — Fri, 16 Feb 2024 13:17:54 GMT

I added the uart3 node to the dts file but the problem still persists.

The uart3 is compiled as okay in the build/zephyr directory:

uart3: uart@b000 {
				compatible = "nordic,nrf-uarte";
				reg = < 0xb000 0x1000 >;
				interrupts = < 0xb 0x1 >;
				status = "okay";
				current-speed = < 0x1c200 >;
				pinctrl-0 = < &uart3_default_alt >;
				pinctrl-1 = < &uart3_sleep_alt >;
				pinctrl-names = "default", "sleep";
			};

Is it possible that the problem is caused by the use of lpuart/uart2 for HCI?
Because I can enable uart3 and register a callback in a different project that does not use BLE.

RE: NRF9160 DK failed to add another UART to BLE NUS example

Håkon Alseth — Fri, 16 Feb 2024 13:02:08 GMT

Hi,

In the compiled down zephyr.dts, uart3 is listed as disabled:

			uart3: uart@b000 {
				compatible = "nordic,nrf-uarte";
				reg = < 0xb000 0x1000 >;
				interrupts = < 0xb 0x1 >;
				status = "disabled";
			};

Could you try to restructure your device tree node? Something like this?

&uart3 {
    status = "okay";
	current-speed = <115200>;
	pinctrl-0 = <&uart3_default_alt>;
	pinctrl-1 = <&uart3_sleep_alt>;
	pinctrl-names = "default", "sleep";
};

Kind regards,

Håkon

RE: NRF9160 DK failed to add another UART to BLE NUS example

V1incentC — Fri, 16 Feb 2024 12:41:18 GMT

I have added the spi3 disable to my overlay but the problem still persists.

devzone.nordicsemi.com/.../8206.nrf9160dk_5F00_nrf9160_5F00_ns.conf devzone.nordicsemi.com/.../4087.prj.conf devzone.nordicsemi.com/.../7776.zephyr.dts

RE: NRF9160 DK failed to add another UART to BLE NUS example

Håkon Alseth — Fri, 16 Feb 2024 12:24:43 GMT

Hi,

Could you share your build/zephyr/zephyr.dts and .config? By default, spi3 is enabled, which will create a conflict with enabling uart3.

If that is the case, you can disable spi3:

&spi3 {
	status = "disabled";
};

Kind regards,

Håkon