topic Re: USB IAD Problem rndis + vcom on LPCxpresso54s018M in LPC Microcontrollers

USB IAD Problem rndis + vcom on LPCxpresso54s018M

rijn — Sat, 20 May 2023 11:26:24 GMT

Hi there, i am attempting to run USB IAD, first device : rndis device, second device : usb vcom

i am able to make windows detect both device, usb rndis + usb vcom,

usb vcom is working , but usb rndis is not receiving or sending anything to me.

Can someone please check ?

Re: USB IAD Problem rndis + vcom on LPCxpresso54s018M

ZhangJennie — Mon, 22 May 2023 06:48:31 GMT

Hi rijn

How does usb rndis work if you disable USB vcom?

Thanks,

Jun Zhang

Re: USB IAD Problem rndis + vcom on LPCxpresso54s018M

rijn — Mon, 22 May 2023 10:22:34 GMT

no it does not work.

rndis does not work even if i disable vcom

Re: USB IAD Problem rndis + vcom on LPCxpresso54s018M

ZhangJennie — Mon, 22 May 2023 14:26:20 GMT

Could you please test SDK demo usb_device_cdc_vnic? The purpose of this demo is to show
how to build a device of USB CDC class to implement RNDIS protocol and to provide a simple project for further development.

Thanks,

Jun Zhang

Re: USB IAD Problem rndis + vcom on LPCxpresso54s018M

rijn — Tue, 23 May 2023 07:02:21 GMT

Please check demo and see if you understand my question .

i am trying to run IAD.

and RNDIS+Vcom both on one interface.

Re: USB IAD Problem rndis + vcom on LPCxpresso54s018M

shaozhongliangs — Wed, 24 May 2023 13:17:17 GMT

@rijn

The attached project is a simple demonstration program based on LPC54018/SDK/usb_examples/usb_device_composite_cdc_vcom_cdc_vcom.
It is enumerated as one RNDIS network port and one virtual COM.
This demo is to show how to build a composite USB device and to provide a
simple example for further development.

I tested the demo on WIN10. It works fine.

IDE: KEIL

HW:LPC54018 EVK + FS USB port