Sideshow.c 4.55 KB
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/*
             LUFA Library
     Copyright (C) Dean Camera, 2010.
              
  dean [at] fourwalledcubicle [dot] com
      www.fourwalledcubicle.com
*/

/*
  Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)

  Permission to use, copy, modify, distribute, and sell this 
  software and its documentation for any purpose is hereby granted
  without fee, provided that the above copyright notice appear in 
  all copies and that both that the copyright notice and this
  permission notice and warranty disclaimer appear in supporting 
  documentation, and that the name of the author not be used in 
  advertising or publicity pertaining to distribution of the 
  software without specific, written prior permission.

  The author disclaim all warranties with regard to this
  software, including all implied warranties of merchantability
  and fitness.  In no event shall the author be liable for any
  special, indirect or consequential damages or any damages
  whatsoever resulting from loss of use, data or profits, whether
  in an action of contract, negligence or other tortious action,
  arising out of or in connection with the use or performance of
  this software.
*/

/*
	SideShow Class demonstration application. This give a reference
	for implementing Microsoft SideShow compatible devices in an
	embedded environment. SideShow allows for gadget data displayed
	on a Windows Vista or later machine to also be displayed on an
	externally connected interactive display. Upon enumeration, this will
	appear as a new SideShow device which can have gadgets loaded onto
	it.
	
	Note that while the incoming content is buffered in packet struct
	form, the data is not actually displayed. It is left to the user to
	write sufficient code to read out the packed data for display to a
	screen.
	
	Installed gadgets can be accessed through the InstalledApplications
	array, with entries that have their InUse flag set being active. As
	only the active content is displayed on the device due to memory
	constraints, new content can be requested as needed.
*/

#include "Sideshow.h"

/** Main program entry point. This routine contains the overall program flow, including initial
 *  setup of all components and the main program loop.
 */
int main(void)
{
	SetupHardware();

	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
	sei();
	
	for (;;)
	{
		SideShow_Task();
		USB_USBTask();
	}
}

/** Configures the board hardware and chip peripherals for the demo's functionality. */
void SetupHardware(void)
{
	/* Disable watchdog if enabled by bootloader/fuses */
	MCUSR &= ~(1 << WDRF);
	wdt_disable();

	/* Disable clock division */
	clock_prescale_set(clock_div_1);
	
	/* Hardware Initialization */
	LEDs_Init();
	USB_Init();
	SerialStream_Init(9600, false);
}

void EVENT_USB_Device_Connect(void)
{
	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
}

void EVENT_USB_Device_Disconnect(void)
{
	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
}

void EVENT_USB_Device_ConfigurationChanged(void)
{
	LEDs_SetAllLEDs(LEDMASK_USB_READY);

	/* Setup Sideshow In and Out Endpoints */
	if (!(Endpoint_ConfigureEndpoint(SIDESHOW_IN_EPNUM, EP_TYPE_BULK,
		                             ENDPOINT_DIR_IN, SIDESHOW_IO_EPSIZE,
	                                 ENDPOINT_BANK_SINGLE)))
	{
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
	}

	if (!(Endpoint_ConfigureEndpoint(SIDESHOW_OUT_EPNUM, EP_TYPE_BULK,
		                             ENDPOINT_DIR_OUT, SIDESHOW_IO_EPSIZE,
	                                 ENDPOINT_BANK_SINGLE)))
	{
		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
	}
}

void EVENT_USB_Device_UnhandledControlRequest(void)
{
	switch (USB_ControlRequest.bRequest)
	{
		case REQ_GetOSFeatureDescriptor:
			if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_VENDOR | REQREC_DEVICE))
			{
				void*    DescriptorPointer;
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				uint16_t DescriptorSize = USB_GetOSFeatureDescriptor(USB_ControlRequest.wValue, USB_ControlRequest.wIndex,
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				                                                     &DescriptorPointer);
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				if (DescriptorSize == NO_DESCRIPTOR)
				  return;
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				Endpoint_ClearSETUP();
				
				Endpoint_Write_Control_PStream_LE(DescriptorPointer, DescriptorSize);
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				Endpoint_ClearOUT();
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			}

			break;
	}
}
	
void SideShow_Task(void)
{
	/* Device must be connected and configured for the task to run */
	if (USB_DeviceState != DEVICE_STATE_Configured)
	  return;

	/* Select the SideShow data out endpoint */
	Endpoint_SelectEndpoint(SIDESHOW_OUT_EPNUM);
	
	/* Check to see if a new SideShow message has been received */
	if (Endpoint_IsReadWriteAllowed())
	{
		/* Process the received SideShow message */
		Sideshow_ProcessCommandPacket();
	}
}