CONFIG_USB_CDC_ACM was assigned the value y, but got the value n. Missing dependencies: DT_HAS_ZEPHYR_CDC_ACM_UART_ENABLED

[iRowBoats8]

Hello,

As the subject says, I am working on a project that when I try to enable the CONFIG_USB_CDC_ACM in my prj.conf I see this error post-build. It seems to not matter what I change in the .conf file, nor the devicetree. I also checked the post-build zephyr.dts file that is created, however that also contains the cdc_acm_uart0 node you'd expect to see. It almost seems that this may be an error, but I can't tell. Any help would be greatly appreciated, or if I can provide any files to help. I am currently using NRF Connect SDK v2.5.0.

Thanks.

[Vidar Berg]

Hello,

This symbol can only be enabled via the devicetree. When you checked the generated zephyr.dts, did the CDC node have its compatible property set to "zephyr,cdc-acm-uart", and had the parent USB controller node the status set to "okay" ?

For example, this is what I get when building a for the nrf52840dongle which has usb cdc enabled by default:

		usbd: zephyr_udc0: usbd@40027000 {
			compatible = "nordic,nrf-usbd";
			reg = < 0x40027000 0x1000 >;
			interrupts = < 0x27 0x1 >;
			num-bidir-endpoints = < 0x1 >;
			num-in-endpoints = < 0x7 >;
			num-out-endpoints = < 0x7 >;
			num-isoin-endpoints = < 0x1 >;
			num-isoout-endpoints = < 0x1 >;
			status = "okay";
			cdc_acm_uart: cdc_acm_uart {
				compatible = "zephyr,cdc-acm-uart";
			};
		};

Best regards,

Vidar

[iRowBoats8]

Hey Vidar,

Thanks for responding. I have attached a code snippet of the zephyr.dts in my build folder. It seems to almost exactly match yours.

usbd: zephyr_udc0: usbd@36000 {
	compatible = "nordic,nrf-usbd";
	reg = < 0x36000 0x1000 >;
	interrupts = < 0x36 0x1 >;
	num-bidir-endpoints = < 0x1 >;
	num-in-endpoints = < 0x7 >;
	num-out-endpoints = < 0x7 >;
	num-isoin-endpoints = < 0x1 >;
	num-isoout-endpoints = < 0x1 >;
	status = "okay";
	cdc_acm_uart0: cdc_acm_uart0 {
		compatible = "zephyr,cdc-acm-uart";
	};
};

[Vidar Berg]

Thanks fort sharing this. Unfortunately, I'm not able to spot any errors in your *.dts snippet either. Is your project a multi image build? I'm wondering if there is a chance the error is reported for a child image such as MCUBoot or similar.

Does your generated config include the "CONFIG_DT_HAS_NORDIC_NRF_USBD_ENABLED=y" line as here:

?

Thanks,