Bootloaders/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 void Application_Jump_Check(void)
  65 {
  66         bool JumpToApplication = false;
  67
  68         #if (BOARD == BOARD_LEONARDO)
  69                 /* Enable pull-up on the IO13 pin so we can use it to select the mode */
  70                 PORTC |=  (1 << 7);
  71                 Delay_MS(10);
  72                 JumpToApplication |= ((PINC & (1 << 7)) != 0);
  73                 PORTC &= ~(1 << 7);
  74         #endif
  75
  76         if (JumpToApplication)
  77         {
  78                 // cppcheck-suppress constStatement
  79                 ((void (*)(void))0x0000)();
  80         }
  81 }
  82
  83 /** Main program entry point. This routine configures the hardware required by the application, then
  84  *  enters a loop to run the application tasks in sequence.
  85  */
  86 int main(void)
  87 {
  88         SetupHardware();
  89
  90         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  91         GlobalInterruptEnable();
  92
  93         for (;;)
  94         {
  95                 MS_Device_USBTask(&Disk_MS_Interface);
  96                 USB_USBTask();
  97         }
  98 }
  99
 100 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 101 static void SetupHardware(void)
 102 {
 103         /* Disable watchdog if enabled by bootloader/fuses */
 104         MCUSR &= ~(1 << WDRF);
 105         wdt_disable();
 106
 107         /* Disable clock division */
 108         clock_prescale_set(clock_div_1);
 109
 110         /* Relocate the interrupt vector table to the bootloader section */
 111         MCUCR = (1 << IVCE);
 112         MCUCR = (1 << IVSEL);
 113
 114         /* Hardware Initialization */
 115         LEDs_Init();
 116         USB_Init();
 117
 118         /* Bootloader active LED toggle timer initialization */
 119         TIMSK1 = (1 << TOIE1);
 120         TCCR1B = ((1 << CS11) | (1 << CS10));
 121 }
 122
 123 /** ISR to periodically toggle the LEDs on the board to indicate that the bootloader is active. */
 124 ISR(TIMER1_OVF_vect, ISR_BLOCK)
 125 {
 126         LEDs_ToggleLEDs(LEDS_LED1 | LEDS_LED2);
 127 }
 128
 129 /** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs. */
 130 void EVENT_USB_Device_Connect(void)
 131 {
 132         /* Indicate USB enumerating */
 133         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 134 }
 135
 136 /** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
 137  *  the status LEDs and stops the Mass Storage management task.
 138  */
 139 void EVENT_USB_Device_Disconnect(void)
 140 {
 141         /* Indicate USB not ready */
 142         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 143 }
 144
 145 /** Event handler for the library USB Configuration Changed event. */
 146 void EVENT_USB_Device_ConfigurationChanged(void)
 147 {
 148         bool ConfigSuccess = true;
 149
 150         /* Setup Mass Storage Data Endpoints */
 151         ConfigSuccess &= MS_Device_ConfigureEndpoints(&Disk_MS_Interface);
 152
 153         /* Indicate endpoint configuration success or failure */
 154         LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 155 }
 156
 157 /** Event handler for the library USB Control Request reception event. */
 158 void EVENT_USB_Device_ControlRequest(void)
 159 {
 160         MS_Device_ProcessControlRequest(&Disk_MS_Interface);
 161 }
 162
 163 /** Mass Storage class driver callback function the reception of SCSI commands from the host, which must be processed.
 164  *
 165  *  \param[in] MSInterfaceInfo  Pointer to the Mass Storage class interface configuration structure being referenced
 166  */
 167 bool CALLBACK_MS_Device_SCSICommandReceived(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
 168 {
 169         bool CommandSuccess;
 170
 171         LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 172         CommandSuccess = SCSI_DecodeSCSICommand(MSInterfaceInfo);
 173         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 174
 175         return CommandSuccess;
 176 }