LUFA/CodeTemplates/HostTemplate/HostApplication.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2014.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2014  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 disclaims 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 /** \file
  32  *
  33  *  Main source file for the USB host application. This file contains the
  34  *  main tasks of the application and is responsible for the initial
  35  *  application hardware configuration.
  36  */
  37
  38 #include "HostApplication.h"
  39
  40 /** Main program entry point. This routine configures the hardware required by the application, then
  41  *  enters a loop to run the application tasks in sequence.
  42  */
  43 int main(void)
  44 {
  45         SetupHardware();
  46
  47         GlobalInterruptEnable();
  48
  49         for (;;)
  50         {
  51                 USB_USBTask();
  52         }
  53 }
  54
  55 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  56 void SetupHardware(void)
  57 {
  58         /* Disable watchdog if enabled by bootloader/fuses */
  59         MCUSR &= ~(1 << WDRF);
  60         wdt_disable();
  61
  62         /* Disable clock division */
  63         clock_prescale_set(clock_div_1);
  64
  65         /* Hardware Initialization */
  66         USB_Init(USB_MODE_Host, USB_DEVICE_OPT_FULLSPEED | USB_OPT_AUTO_PLL);
  67 }
  68
  69 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
  70  *  starts the library USB task to begin the enumeration and USB management process.
  71  */
  72 void EVENT_USB_Host_DeviceAttached(void)
  73 {
  74
  75 }
  76
  77 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
  78  *  stops the library USB task management process.
  79  */
  80 void EVENT_USB_Host_DeviceUnattached(void)
  81 {
  82
  83 }
  84
  85 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
  86  *  enumerated by the host and is now ready to be used by the application.
  87  */
  88 void EVENT_USB_Host_DeviceEnumerationComplete(void)
  89 {
  90         uint16_t ConfigDescriptorSize;
  91         uint8_t  ConfigDescriptorData[512];
  92
  93         if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
  94                                                sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
  95         {
  96                 return;
  97         }
  98
  99         if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
 100         {
 101                 return;
 102         }
 103 }
 104
 105 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 106 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 107 {
 108         USB_Disable();
 109         for(;;);
 110 }
 111
 112 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 113  *  enumerating an attached USB device.
 114  */
 115 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
 116                                             const uint8_t SubErrorCode)
 117 {
 118
 119 }
 120
 121 /* Required callback for retrieving descriptors from a LUFA device - unless the USB_HOST_ONLY configuration
 122  * option is set, this is still required even in an application that uses host mode only.
 123  */
 124 uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
 125                 const uint8_t wIndex,
 126                 const void** const DescriptorAddress
 127 #if defined(HAS_MULTIPLE_DESCRIPTOR_ADDRESS_SPACES)
 128                 , uint8_t* const DescriptorMemorySpace
 129 #endif
 130 )
 131 {
 132         return 0;
 133 }