USB Composite device application development using MQX 3.4 USB device stack

siddu — Fri, 29 Jan 2010 11:46:14 GMT

We have sample code for Serial over USB and MSD class using MQX 3.4 USB device stack.

My requirement is I have to design composite device application which supports CDC+MSD.

I started working on enumeration portion.

I am using virtual comport sample code as base code.

I modified usb_descriptor.c and usb_descriptor.h file for composite device support.

For Virtual comport application sample code USB_Class_CDC_Init() function.

To add mass stoarge support I referred MSC sample code and I defien required variables and passed that information to USB_Class_MSC_Init() function.

When I call USB_Class_MSC_Init() which initialize the mass storage device driver with call back functions,device enumeration is failing.

What are all the thing sI have to take care for the composite device application development?

Regards,Subhashini

Re: USB Composite device application development using MQX 3.4 USB device stack

frrescaleDevelo — Wed, 04 Apr 2012 05:20:54 GMT

Hey did you ever get anywhere with what you wanted to do?