Composite USB Devices

[Darrel Taylor]

Your drive has it's own Host controller.
But you can't connect that to the main USB bus. Only external Slave devices.

Anyhow, the original question from Kamikaze47 was about composite USB devices, such as shown in microchip's TB057. Although they call it "Combination devices".

http://www.microchip.com/stellent/id...pnote=en011986

Which is possible with PBP, but not directly supported.
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[skimask]

Your drive has it's own Host controller.
But you can't connect that to the main USB bus. Only external Slave devices.

Yes, true, and that's what I thought was meant by 'composite USB', able to Host and Slave in the same box, but not at the same time.
And yes, I can connect the box's internal hard drive to the PC thru the USB (thumbdrive port is dead, hard drive is slave)...and I can connect the thumbdrive to the PC thru the USB connections (hard drive port must act as a signal pass thru to the thumbdrive port or something, not sure)...and I can connect the thumbdrive to the hard drive by plugging it in (the PC port is dead, hard drive is master, thumbdrive port is slave).
I just can't do any combination of any of the three at any one time.

[PJALM]

I think he still doesn't understand what a composite device is. Composite devices are slave only but are multiple slaves, for example, an HID mouse and keyboard in the same device like the USB to PS/2 converters or even maybe 2 PS/2 ports, a joystick port and a serial port in same device.

[skimask]

I think he still doesn't understand what a composite device is.

You're right...
I don't have a clue about the difference between master, slave, and composite devices...

[PJALM]

Sorry didn't mean no disrespect, just trying to help