Create HID Applications

Create HID Applications explain how to program a USB Human Interface Device using the RL-USB Library. HID applications control keyboards, mice, and other I/O devices.

Include into the project and configure the following RL-USB Device Source Files:

1. The library that matches the device core:
   USB_CM1.lib - for Cortex-M1 devices.
   USB_CM3.lib - for Cortex-M3 devices.
   USB_ARM_L.lib - for ARM7 or ARM9 devices.
2. usb_config.c - to configure the USB system.
3. usbd_device family.c(.h) - to configure the device hardware layer.
4. usbd_user_hid.c - to adapt the code to the application needs.
5. USBD_Demo.c - to initialize and connect the USB Device from main().

   ..
   usbd_init();                         // USB Initialization
   usbd_connect(__TRUE);                // USB Connect
   ..
   

Applications can be created using existing µVision HID projects.

1. Copy all files from any folder \ARM\Boards\Vendor\BoardName\RL\USB\Device\HID to a new folder and open the project *.uvproj with µVision. RTX projects are using the RTX-RTOS, whereas simple HID projects work without an RTOS. However, the USB configuration does not differ.
2. Open the file usb_config.c and configure the USB device with the Configuration Wizard.
3. Enable USB Device and set the device characteristics.

   

4. Enable Class Support and Human Interface (HID) and set the characteristics.

   

5. Optionally, adapt the source file usbd_device family.c that contains hardware dependent code.
6. Modify the file usbd_user_hid.c to adapt the code to the application needs.

Note

• The options are explained in Human Interface Device (HID) Options.
• Use the Test HID Client application for testing the HID applications that interact with the LEDs and push buttons of the board.