This version of this document is no longer maintained. For the latest documentation, see http://www.qnx.com/developers/docs.

Before You Begin

• System requirements
• USB devices supported
• Known limitations

System requirements

This USB SDK is designed to work with both QNX Neutrino 6 and with QNX 4.

For QNX Neutrino 6.3

You'll need the following:

• QNX Neutrino 6.3
• GNU GCC 2.952
• USB EHCI, OHCI or UHCI controller, version 1.1 and 2.0 compliant

For QNX 4

You'll need the following:

• QNX 4.25, patch D or later
• Watcom 10.6, patch B or later
• USB EHCI, OHCI or UHCI controller, version 1.1 and 2.0 compliant

USB devices supported

Known limitations

EHCI

Isochronous and split isochronous transfers are unsupported at this time.

Retrieving 'Other Speed Descriptor' has not been implemented.

Photon and text mode

If you're using Photon as well as text mode, you won't be able to switch between them and use a USB keyboard once the USB stack has been started.

From a cold boot, you'll be able to use a USB keyboard in text mode before the USB stack has been started. As soon as you start the USB stack, you can't use a USB keyboard in text mode.

Make sure that the command line for devi-hirun (or Input) includes the option to not reset the keyboard controller. For example: devi-hirun kbd -R fd -d/dev/usbkbd0 & Or with QNX 4: Input kbd -R fd -d/dev/usbkbd0 & If you don't use the -R option, then the keyboard controller will be reset whenever you switch between Photon and text mode, and the machine may hang.