USB CDC ACM different PIDs

RE: USB CDC ACM different PIDs

Kenneth — Tue, 03 Dec 2024 11:59:31 GMT

Not sure I understand the question, but there are a few USB examples that have usbd_next_prj.conf that you can apply when building the project to use usb next. In general if you find inconsistencies it's not always that the project was made at the same time, and sometimes things have evolved without the example being updated.

Kenneth

RE: USB CDC ACM different PIDs

Rantanplan — Tue, 03 Dec 2024 11:17:38 GMT

Hi Kenneth,

OK, I think I got it.

https://github.com/zephyrproject-rtos/zephyr/blob/main/samples/subsys/usb/common/sample_usbd_init.c

is more like a template code, which I should copy to my application. There I can change the CONFIG_ZEPHYR_PROJECT_USB_VID definition.

But I'm a bit wondering, why the USB_STACK_NEXT sample is not using:

https://github.com/zephyrproject-rtos/zephyr/blob/main/subsys/usb/device_next/usbd_device.c

Kind regards,

Christian

RE: USB CDC ACM different PIDs

Kenneth — Mon, 02 Dec 2024 16:44:27 GMT

Find where you have the USBD_DEVICE_DEFINE() macro, it's the third parameter.

Kenneth

RE: USB CDC ACM different PIDs

Rantanplan — Sun, 01 Dec 2024 16:51:34 GMT

Hello,

many thanks for the answer.

I'm able to set the PID using CONFIG_SAMPLE_USBD_PID.

But I did not find an option to define the VID.

In https://github.com/zephyrproject-rtos/zephyr/blob/main/samples/subsys/usb/common/sample_usbd_init.c

CONFIG_ZEPHYR_PROJECT_USB_VID is defined, but cannot be overwritten using prj.conf.

Many thanks for your answers in advance.

Kind regards,

Christian

RE: USB CDC ACM different PIDs

Turbo J — Sun, 24 Nov 2024 09:55:14 GMT

Vid and Pid can be set as a config option. Check build/zephyr/.config file (where all of those are collected together) but you should put these in prj.conf for the build.

An USB device can have one VID:PID.