USB issues when combining 2 classes (generic Bulk and MSC) using the composite class method

TIguru

Other Parts Discussed in Thread: AM3352

Hi,

We are currently developing the USB firmware/software for our system using Starterware as a reference. We are running into some trouble when combining 2 classes (generic Bulk and MSC) using the composite class method described in the wiki:

Ideally, we don’t want to create a new windows driver for the composite device combining the 2 classes. Is creating a custom composite driver necessary? If so, can we have the source code for the ‘usb_dev_bulk’ windows driver?

over 9 years ago

0 Lalindra Jayatilleke over 9 years ago

TI__Mastermind 30365 points

TIguru,

What device is this? Which Starterware release are you on?

Lali

0 TIguru over 9 years ago in reply to Lalindra Jayatilleke

Expert 1430 points

Hi Lali,
We are using version v2.00.01.01 . CPU is AM3352.

0 Thanh H Tran over 9 years ago in reply to TIguru

TI__Intellectual 760 points

We have couple of questions:

+ How have you tested the usb_dev_bulk? Do you already have the Windows side driver for it?

+ Do you have separate end point numbers for MSC and for the usb_dev_bulk interfaces?

We think you don't need new driver for the composite device as long as your VID/PID matches with the driver of the dev_bulk device.

As for the window side source code, you can get the usb_dev_bulk Window side example source from here:

http://www.ti.com/tool/sw-ek-lm4f232

The example code is in: ti\StellarisWare\tools\usb_bulk_example

Best regards

-Thanh

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USB issues when combining 2 classes (generic Bulk and MSC) using the composite class method