protocol/lufa/LUFA-git/Demos/Device/ClassDriver/MassStorage/MassStorage.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 MassStorage demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "MassStorage.h"
  38
  39 /** LUFA Mass Storage Class driver interface configuration and state information. This structure is
  40  *  passed to all Mass Storage Class driver functions, so that multiple instances of the same class
  41  *  within a device can be differentiated from one another.
  42  */
  43 USB_ClassInfo_MS_Device_t Disk_MS_Interface =
  44         {
  45                 .Config =
  46                         {
  47                                 .InterfaceNumber           = INTERFACE_ID_MassStorage,
  48                                 .DataINEndpoint            =
  49                                         {
  50                                                 .Address           = MASS_STORAGE_IN_EPADDR,
  51                                                 .Size              = MASS_STORAGE_IO_EPSIZE,
  52                                                 .Banks             = 1,
  53                                         },
  54                                 .DataOUTEndpoint           =
  55                                         {
  56                                                 .Address           = MASS_STORAGE_OUT_EPADDR,
  57                                                 .Size              = MASS_STORAGE_IO_EPSIZE,
  58                                                 .Banks             = 1,
  59                                         },
  60                                 .TotalLUNs                 = TOTAL_LUNS,
  61                         },
  62         };
  63
  64
  65 /** Main program entry point. This routine contains the overall program flow, including initial
  66  *  setup of all components and the main program loop.
  67  */
  68 int main(void)
  69 {
  70         SetupHardware();
  71
  72         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  73         GlobalInterruptEnable();
  74
  75         for (;;)
  76         {
  77                 MS_Device_USBTask(&Disk_MS_Interface);
  78                 USB_USBTask();
  79         }
  80 }
  81
  82 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  83 void SetupHardware(void)
  84 {
  85 #if (ARCH == ARCH_AVR8)
  86         /* Disable watchdog if enabled by bootloader/fuses */
  87         MCUSR &= ~(1 << WDRF);
  88         wdt_disable();
  89
  90         /* Disable clock division */
  91         clock_prescale_set(clock_div_1);
  92 #elif (ARCH == ARCH_XMEGA)
  93         /* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */
  94         XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU);
  95         XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL);
  96
  97         /* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */
  98         XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
  99         XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB);
 100
 101         PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm;
 102 #endif
 103
 104         /* Hardware Initialization */
 105         LEDs_Init();
 106         Dataflash_Init();
 107         USB_Init();
 108
 109         /* Check if the Dataflash is working, abort if not */
 110         if (!(DataflashManager_CheckDataflashOperation()))
 111         {
 112                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 113                 for(;;);
 114         }
 115
 116         /* Clear Dataflash sector protections, if enabled */
 117         DataflashManager_ResetDataflashProtections();
 118 }
 119
 120 /** Event handler for the library USB Connection event. */
 121 void EVENT_USB_Device_Connect(void)
 122 {
 123         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 124 }
 125
 126 /** Event handler for the library USB Disconnection event. */
 127 void EVENT_USB_Device_Disconnect(void)
 128 {
 129         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 130 }
 131
 132 /** Event handler for the library USB Configuration Changed event. */
 133 void EVENT_USB_Device_ConfigurationChanged(void)
 134 {
 135         bool ConfigSuccess = true;
 136
 137         ConfigSuccess &= MS_Device_ConfigureEndpoints(&Disk_MS_Interface);
 138
 139         LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 140 }
 141
 142 /** Event handler for the library USB Control Request reception event. */
 143 void EVENT_USB_Device_ControlRequest(void)
 144 {
 145         MS_Device_ProcessControlRequest(&Disk_MS_Interface);
 146 }
 147
 148 /** Mass Storage class driver callback function the reception of SCSI commands from the host, which must be processed.
 149  *
 150  *  \param[in] MSInterfaceInfo  Pointer to the Mass Storage class interface configuration structure being referenced
 151  */
 152 bool CALLBACK_MS_Device_SCSICommandReceived(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
 153 {
 154         bool CommandSuccess;
 155
 156         LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 157         CommandSuccess = SCSI_DecodeSCSICommand(MSInterfaceInfo);
 158         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 159
 160         return CommandSuccess;
 161 }
 162