LPC MicrocontrollersのトピックRe: LPC55x with 2x USB CDC's, one to each core

LPC55x with 2x USB CDC's, one to each core

dav1 — Mon, 08 Aug 2022 07:39:10 GMT

Hi,

I'd like to run two different applications on the LPC55S6x, both needing its own USB CDC connection.
It needs to be the same physical USB PHY (HS/480mbit)

What would be the easiest and most efficient way to achieve this?

In AN12335 it briefly mentions Inter-CPU Mailbox and that shared resource can be claimed by both cores. But I can't find how to define so that one USB endpoint is tied to core0 vs another endpoint is tied to core1

Thanks

Re: LPC55x with 2x USB CDC's, one to each core

Alice_Yang — Thu, 11 Aug 2022 09:49:05 GMT

Hello,

I think you can consider it as two separate projects, each with its own space and endpoint to config USB CDC .

Re: LPC55x with 2x USB CDC's, one to each core

dav1 — Thu, 11 Aug 2022 11:38:53 GMT

can you please provide an example how you would configure two cores, both getting data from the same usb-phy (usb1). i.e. two cdc's one to each m33

Re: LPC55x with 2x USB CDC's, one to each core

Alice_Yang — Mon, 15 Aug 2022 09:01:31 GMT

Hello Dav,

Sorry I haven't find this example, there is demo Composite CDC_VCOM_CDC_VCOM under SDK.

Alice

Re: LPC55x with 2x USB CDC's, one to each core

dav1 — Mon, 15 Aug 2022 09:28:43 GMT

that demo seem to run on a single core

my question is how to assign different usb endpoints to different arm core's