Bootloaders/Incomplete/MassStorage/BootloaderMassStorage.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2013.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2013  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 Mass Storage class bootloader. This file contains the complete bootloader logic.
  34  */
  35
  36 #include "BootloaderMassStorage.h"
  37
  38 /** LUFA Mass Storage Class driver interface configuration and state information. This structure is
  39  *  passed to all Mass Storage Class driver functions, so that multiple instances of the same class
  40  *  within a device can be differentiated from one another.
  41  */
  42 USB_ClassInfo_MS_Device_t Disk_MS_Interface =
  43         {
  44                 .Config =
  45                         {
  46                                 .InterfaceNumber           = 0,
  47                                 .DataINEndpoint            =
  48                                         {
  49                                                 .Address           = MASS_STORAGE_IN_EPADDR,
  50                                                 .Size              = MASS_STORAGE_IO_EPSIZE,
  51                                                 .Banks             = 1,
  52                                         },
  53                                 .DataOUTEndpoint           =
  54                                         {
  55                                                 .Address           = MASS_STORAGE_OUT_EPADDR,
  56                                                 .Size              = MASS_STORAGE_IO_EPSIZE,
  57                                                 .Banks             = 1,
  58                                         },
  59                                 .TotalLUNs                 = 1,
  60                         },
  61         };
  62
  63
  64 /** Main program entry point. This routine contains the overall program flow, including initial
  65  *  setup of all components and the main program loop.
  66  */
  67 int main(void)
  68 {
  69         SetupHardware();
  70
  71         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  72         GlobalInterruptEnable();
  73
  74         for (;;)
  75         {
  76                 MS_Device_USBTask(&Disk_MS_Interface);
  77                 USB_USBTask();
  78         }
  79 }
  80
  81 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  82 void SetupHardware(void)
  83 {
  84         /* Disable watchdog if enabled by bootloader/fuses */
  85         MCUSR &= ~(1 << WDRF);
  86         wdt_disable();
  87
  88         /* Disable clock division */
  89         clock_prescale_set(clock_div_1);
  90
  91         /* Relocate the interrupt vector table to the bootloader section */
  92         MCUCR = (1 << IVCE);
  93         MCUCR = (1 << IVSEL);
  94
  95         /* Hardware Initialization */
  96         LEDs_Init();
  97         USB_Init();
  98
  99         /* Bootloader active LED toggle timer initialization */
 100         TIMSK1 = (1 << TOIE1);
 101         TCCR1B = ((1 << CS11) | (1 << CS10));
 102 }
 103
 104 /** ISR to periodically toggle the LEDs on the board to indicate that the bootloader is active. */
 105 ISR(TIMER1_OVF_vect, ISR_BLOCK)
 106 {
 107         LEDs_ToggleLEDs(LEDS_LED1 | LEDS_LED2);
 108 }
 109
 110 /** Event handler for the library USB Connection event. */
 111 void EVENT_USB_Device_Connect(void)
 112 {
 113         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 114 }
 115
 116 /** Event handler for the library USB Disconnection event. */
 117 void EVENT_USB_Device_Disconnect(void)
 118 {
 119         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 120 }
 121
 122 /** Event handler for the library USB Configuration Changed event. */
 123 void EVENT_USB_Device_ConfigurationChanged(void)
 124 {
 125         bool ConfigSuccess = true;
 126
 127         ConfigSuccess &= MS_Device_ConfigureEndpoints(&Disk_MS_Interface);
 128
 129         LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 130 }
 131
 132 /** Event handler for the library USB Control Request reception event. */
 133 void EVENT_USB_Device_ControlRequest(void)
 134 {
 135         MS_Device_ProcessControlRequest(&Disk_MS_Interface);
 136 }
 137
 138 /** Mass Storage class driver callback function the reception of SCSI commands from the host, which must be processed.
 139  *
 140  *  \param[in] MSInterfaceInfo  Pointer to the Mass Storage class interface configuration structure being referenced
 141  */
 142 bool CALLBACK_MS_Device_SCSICommandReceived(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
 143 {
 144         bool CommandSuccess;
 145
 146         LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 147         CommandSuccess = SCSI_DecodeSCSICommand(MSInterfaceInfo);
 148         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 149
 150         return CommandSuccess;
 151 }
 152