topic Re: SerialManager and composite cdc vcom in MCX Microcontrollers

SerialManager and composite cdc vcom

Peter19 — Sun, 07 Dec 2025 18:45:25 GMT

I have setup usb_device_descriptor for composite as per frdmmcxn947_dev_composite_cdc_vcom_cdc_vcom_freertos_cm33_core0. Now I want to apply that to frdmmcxn947_hello_world_virtual_com_cm33_core0 that uses SerialManager.

I don't know how init SerialManager for the second vcom.

Both vcom enumerates fine though.

Re: SerialManager and composite cdc vcom

Alice_Yang — Wed, 10 Dec 2025 02:31:28 GMT

Hello @Peter19

Do you mean you want both VCOMs to use SerialManager for input and output? If so, you need to create two SerialManager instances, each linked to its corresponding CDC ACM (VCOM0 and VCOM1).

Or you want to change from VCOM0 TO VCOM1?

Alice

Re: SerialManager and composite cdc vcom

Peter19 — Wed, 10 Dec 2025 07:02:19 GMT

Hi @Alice_Yang

I am talking about two SerialManager instances, linked to VCOM0 and VCOM1.

Re: SerialManager and composite cdc vcom

Alice_Yang — Thu, 11 Dec 2025 03:25:11 GMT

Hello @Peter19

Please create another SerialManager instance by referring to the hello_world_virtual demo.

If you encounter any questions during development, please feel free to contact us.

Thank you.

Alice

Re: SerialManager and composite cdc vcom

Peter19 — Thu, 11 Dec 2025 06:45:07 GMT

Hello @Alice_Yang

That is why I contacted you.
Please suggest how to init SerialManager and reference different endpoints. Today only which usb controller is used is passed.

If you have a working example of this, please share / direct me to it.

Regards /P

Re: SerialManager and composite cdc vcom

Alice_Yang — Fri, 12 Dec 2025 03:30:38 GMT

Hello @Peter19

I'm sorry, I don't have an example at the moment. I will need a few more days to work on the development when I have time.

Alice