/** Function to manage HID report generation and transmission to the host. */
void HID_Task(void)
{
	/* Device must be connected and configured for the task to run */
	if (USB_DeviceState != DEVICE_STATE_Configured)
	  return;

	/* Select the Joystick Report Endpoint */
	Endpoint_SelectEndpoint(JOYSTICK_EPADDR);

	/* Check to see if the host is ready for another packet */
	if (Endpoint_IsINReady())
	{
		USB_JoystickReport_Data_t JoystickReportData;

		/* Create the next HID report to send to the host */
		GetNextReport(&JoystickReportData);

		/* Write Joystick Report Data */
		Endpoint_Write_Stream_LE(&JoystickReportData, sizeof(JoystickReportData), NULL);

		/* Finalize the stream transfer to send the last packet */
		Endpoint_ClearIN();

		/* Clear the report data afterwards */
		memset(&JoystickReportData, 0, sizeof(JoystickReportData));
	}
}
Exemplo n.º 2
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/** Event handler for the USB_UnhandledControlPacket event. This is used to catch standard and class specific
 *  control requests that are not handled internally by the USB library (including the HID commands, which are
 *  all issued via the control endpoint), so that they can be handled appropriately for the application.
 */
void EVENT_USB_UnhandledControlPacket(void)
{
	/* Handle HID Class specific requests */
	switch (USB_ControlRequest.bRequest)
	{
		case REQ_GetReport:
			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
			{
				USB_JoystickReport_Data_t JoystickReportData;
				
				Endpoint_ClearSETUP();

				/* Create the next HID report to send to the host */				
				GetNextReport(&JoystickReportData);
					
				/* Write the report data to the control endpoint */
				Endpoint_Write_Control_Stream_LE(&JoystickReportData, sizeof(JoystickReportData));
				
				/* Finalize the stream transfer to send the last packet or clear the host abort */
				Endpoint_ClearOUT();
			}
		
			break;
	}
}