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 /** Main program entry point. This routine configures the hardware required by the application, then
  65  *  enters a loop to run the application tasks in sequence.
  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 static 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 USB_Connect event. This indicates that the device is enumerating via the status LEDs. */
 111 void EVENT_USB_Device_Connect(void)
 112 {
 113         /* Indicate USB enumerating */
 114         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 115 }
 116
 117 /** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
 118  *  the status LEDs and stops the Mass Storage management task.
 119  */
 120 void EVENT_USB_Device_Disconnect(void)
 121 {
 122         /* Indicate USB not ready */
 123         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 124 }
 125
 126 /** Event handler for the library USB Configuration Changed event. */
 127 void EVENT_USB_Device_ConfigurationChanged(void)
 128 {
 129         bool ConfigSuccess = true;
 130
 131         /* Setup Mass Storage Data Endpoints */
 132         ConfigSuccess &= MS_Device_ConfigureEndpoints(&Disk_MS_Interface);
 133
 134         /* Indicate endpoint configuration success or failure */
 135         LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 136 }
 137
 138 /** Event handler for the library USB Control Request reception event. */
 139 void EVENT_USB_Device_ControlRequest(void)
 140 {
 141         MS_Device_ProcessControlRequest(&Disk_MS_Interface);
 142 }
 143
 144 /** Mass Storage class driver callback function the reception of SCSI commands from the host, which must be processed.
 145  *
 146  *  \param[in] MSInterfaceInfo  Pointer to the Mass Storage class interface configuration structure being referenced
 147  */
 148 bool CALLBACK_MS_Device_SCSICommandReceived(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
 149 {
 150         bool CommandSuccess;
 151
 152         LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 153         CommandSuccess = SCSI_DecodeSCSICommand(MSInterfaceInfo);
 154         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 155
 156         return CommandSuccess;
 157 }