USB HID Composite Example

This example uses the USB HID class modules . See the documentation of these modules for links to relevant specification documents.

This example shows how to use two HID classes as one composite device. A development kit connected to the host computer will enumerate as two independent HID classes:

• HID mouse
• HID keyboard

Note

You can reduce the functionality of this composite example to a single mouse or a single keyboard. To do that, modify the definitions of CONFIG_HAS_MOUSE and CONFIG_HAS_KBD.

Setup

You can find the source code and the project file of the example in the following folder: <InstallFolder>\examples\peripheral\usbd_hid_composite

LED assignments:

• LED 1 shows the USB bus state:
  • ON: State RESUME
  • OFF: State SUSPEND
• LED 2 shows the USB device library status:
  • ON: USB library STARTED
  • OFF: USB library STOPPED
• LED 3 shows that a USB HID report IN has been sent:
  • TOGGLE - Report sent
• LED 4 shows that a USB HID report OUT has been received:
  • TOGGLE - Report received

Button assignments:

• Button 1 moves the HID mouse cursor.
• Button 2 presses the HID mouse left button.
• Button 3 presses the HID keyboard Shift key.
• Button 4 presses the HID keyboard "g" letter.

Testing

Test the USB HID Composite Example application by performing the following steps:

1. Compile and program the application.
2. Connect the development kit to the host computer.
3. The device will enumerate as a HID mouse and a HID keyboard class.
4. Press the buttons on the development kit and observe the results on the host computer and on the LEDs.