Demos/Device/Incomplete/Sideshow/Sideshow.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /*
  32         SideShow Class demonstration application. This give a reference
  33         for implementing Microsoft SideShow compatible devices in an
  34         embedded environment. SideShow allows for gadget data displayed
  35         on a Windows Vista or later machine to also be displayed on an
  36         externally connected interactive display. Upon enumeration, this will
  37         appear as a new SideShow device which can have gadgets loaded onto
  38         it.
  39
  40         Note that while the incoming content is buffered in packet struct
  41         form, the data is not actually displayed. It is left to the user to
  42         write sufficient code to read out the packed data for display to a
  43         screen.
  44
  45         Installed gadgets can be accessed through the InstalledApplications
  46         array, with entries that have their InUse flag set being active. As
  47         only the active content is displayed on the device due to memory
  48         constraints, new content can be requested as needed.
  49 */
  50
  51 #include "Sideshow.h"
  52
  53 /** Main program entry point. This routine contains the overall program flow, including initial
  54  *  setup of all components and the main program loop.
  55  */
  56 int main(void)
  57 {
  58         SetupHardware();
  59
  60         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  61         sei();
  62
  63         for (;;)
  64         {
  65                 SideShow_Task();
  66                 USB_USBTask();
  67         }
  68 }
  69
  70 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  71 void SetupHardware(void)
  72 {
  73         /* Disable watchdog if enabled by bootloader/fuses */
  74         MCUSR &= ~(1 << WDRF);
  75         wdt_disable();
  76
  77         /* Disable clock division */
  78         clock_prescale_set(clock_div_1);
  79
  80         /* Hardware Initialization */
  81         LEDs_Init();
  82         USB_Init();
  83         Serial_Init(9600, false);
  84
  85         /* Create a stdio stream for the serial port for stdin and stdout */
  86         Serial_CreateStream(NULL);
  87 }
  88
  89 void EVENT_USB_Device_Connect(void)
  90 {
  91         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  92 }
  93
  94 void EVENT_USB_Device_Disconnect(void)
  95 {
  96         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  97 }
  98
  99 void EVENT_USB_Device_ConfigurationChanged(void)
 100 {
 101         bool ConfigSuccess = true;
 102
 103         /* Setup Sideshow Data Endpoints */
 104         ConfigSuccess &= Endpoint_ConfigureEndpoint(SIDESHOW_IN_EPNUM,  EP_TYPE_BULK, ENDPOINT_DIR_IN,
 105                                                     SIDESHOW_IO_EPSIZE, ENDPOINT_BANK_SINGLE);
 106         ConfigSuccess &= Endpoint_ConfigureEndpoint(SIDESHOW_OUT_EPNUM, EP_TYPE_BULK, ENDPOINT_DIR_OUT,
 107                                                     SIDESHOW_IO_EPSIZE, ENDPOINT_BANK_SINGLE);
 108
 109         /* Indicate endpoint configuration success or failure */
 110         LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 111 }
 112
 113 void EVENT_USB_Device_ControlRequest(void)
 114 {
 115         switch (USB_ControlRequest.bRequest)
 116         {
 117                 case REQ_GetOSFeatureDescriptor:
 118                         if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_VENDOR | REQREC_DEVICE))
 119                         {
 120                                 const void* DescriptorPointer;
 121                                 uint16_t    DescriptorSize = USB_GetOSFeatureDescriptor(USB_ControlRequest.wValue,
 122                                                                                         USB_ControlRequest.wIndex,
 123                                                                                         &DescriptorPointer);
 124
 125                                 if (DescriptorSize == NO_DESCRIPTOR)
 126                                   return;
 127
 128                                 Endpoint_ClearSETUP();
 129
 130                                 Endpoint_Write_Control_PStream_LE(DescriptorPointer, DescriptorSize);
 131                                 Endpoint_ClearOUT();
 132                         }
 133
 134                         break;
 135         }
 136 }
 137
 138 void SideShow_Task(void)
 139 {
 140         /* Device must be connected and configured for the task to run */
 141         if (USB_DeviceState != DEVICE_STATE_Configured)
 142           return;
 143
 144         /* Select the SideShow data out endpoint */
 145         Endpoint_SelectEndpoint(SIDESHOW_OUT_EPNUM);
 146
 147         /* Check to see if a new SideShow message has been received */
 148         if (Endpoint_IsReadWriteAllowed())
 149         {
 150                 /* Process the received SideShow message */
 151                 Sideshow_ProcessCommandPacket();
 152         }
 153 }
 154