Create USB Host HID Applications

Create USB Host HID Applications shows how to program a USB Host to support USB human interface devices using the RL-USB Library.

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

1. The USB 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. usbh_ohci_device family.c - to configure the device hardware layer (for devices with OHCI host controllers).
3. usb_config.c - to configure the USB system.
4. main file.c - to initialize the USB Host from main().

   ..
   usbh_init(0);                                            // initialize USB Host Controller 0
   while(1) {
     ..
     usbh_engine(0);                                        // check for new devices
     ..
   }
   

Several µVision USB Host HID projects can be used as a template for creating new USB Host HID applications. The files can be edited directly or using the µVision Configuration Wizard.

1. Copy all files from any folder \ARM\Boards\Vendor\Board\RL\USB\Host\HID_Kbd to a new folder and open the *.uvproj project with µVision.
2. Open the file usb_config.c and set USB Host.

For USB Host devices that support OHCI:

3. Enable the option USB Host x and select OHCI for Controller Interface.
   
4. In the Class Configuration section, enable Human Interface Device Class (HID).
5. Open the file usbh_ohci_device family.c and set the USB Host OHCI Settings.
   

For USB Host devices that support a Custom USB Host Controller:

3. Enable the option USB Host x and select Custom for Controller Interface.
   
4. In the Class Configuration section, enable Human Interface Device Class (HID).
5. Open the file usbh_device family.c and set the Custom USB Host Controller Settings.
   

Note

• The configuration options are explained in RL-USB Host Configuration.