lib/lufa/Demos/Device/ClassDriver/VirtualSerialMassStorage/VirtualSerialMassStorage.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2017.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2017  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 VirtualSerialMassStorage demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "VirtualSerialMassStorage.h"
  38
  39 /** LUFA CDC Class driver interface configuration and state information. This structure is
  40  *  passed to all CDC 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_CDC_Device_t VirtualSerial_CDC_Interface =
  44         {
  45                 .Config =
  46                         {
  47                                 .ControlInterfaceNumber         = INTERFACE_ID_CDC_CCI,
  48                                 .DataINEndpoint                 =
  49                                         {
  50                                                 .Address                = CDC_TX_EPADDR,
  51                                                 .Size                   = CDC_TXRX_EPSIZE,
  52                                                 .Banks                  = 1,
  53                                         },
  54                                 .DataOUTEndpoint                =
  55                                         {
  56                                                 .Address                = CDC_RX_EPADDR,
  57                                                 .Size                   = CDC_TXRX_EPSIZE,
  58                                                 .Banks                  = 1,
  59                                         },
  60                                 .NotificationEndpoint           =
  61                                         {
  62                                                 .Address                = CDC_NOTIFICATION_EPADDR,
  63                                                 .Size                   = CDC_NOTIFICATION_EPSIZE,
  64                                                 .Banks                  = 1,
  65                                         },
  66                         },
  67         };
  68
  69 /** LUFA Mass Storage Class driver interface configuration and state information. This structure is
  70  *  passed to all Mass Storage Class driver functions, so that multiple instances of the same class
  71  *  within a device can be differentiated from one another.
  72  */
  73 USB_ClassInfo_MS_Device_t Disk_MS_Interface =
  74         {
  75                 .Config =
  76                         {
  77                                 .InterfaceNumber                = INTERFACE_ID_MassStorage,
  78                                 .DataINEndpoint                 =
  79                                         {
  80                                                 .Address                = MASS_STORAGE_IN_EPADDR,
  81                                                 .Size                   = MASS_STORAGE_IO_EPSIZE,
  82                                                 .Banks                  = 1,
  83                                         },
  84                                 .DataOUTEndpoint                =
  85                                         {
  86                                                 .Address                = MASS_STORAGE_OUT_EPADDR,
  87                                                 .Size                   = MASS_STORAGE_IO_EPSIZE,
  88                                                 .Banks                  = 1,
  89                                         },
  90                                 .TotalLUNs                      = TOTAL_LUNS,
  91                         },
  92         };
  93
  94 /** Standard file stream for the CDC interface when set up, so that the virtual CDC COM port can be
  95  *  used like any regular character stream in the C APIs.
  96  */
  97 static FILE USBSerialStream;
  98
  99
 100 /** Main program entry point. This routine contains the overall program flow, including initial
 101  *  setup of all components and the main program loop.
 102  */
 103 int main(void)
 104 {
 105         SetupHardware();
 106
 107         /* Create a regular character stream for the interface so that it can be used with the stdio.h functions */
 108         CDC_Device_CreateStream(&VirtualSerial_CDC_Interface, &USBSerialStream);
 109
 110         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 111         GlobalInterruptEnable();
 112
 113         for (;;)
 114         {
 115                 CheckJoystickMovement();
 116
 117                 /* Must throw away unused bytes from the host, or it will lock up while waiting for the device */
 118                 CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
 119
 120                 CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
 121                 MS_Device_USBTask(&Disk_MS_Interface);
 122                 USB_USBTask();
 123         }
 124 }
 125
 126 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 127 void SetupHardware(void)
 128 {
 129 #if (ARCH == ARCH_AVR8)
 130         /* Disable watchdog if enabled by bootloader/fuses */
 131         MCUSR &= ~(1 << WDRF);
 132         wdt_disable();
 133
 134         /* Disable clock division */
 135         clock_prescale_set(clock_div_1);
 136 #elif (ARCH == ARCH_XMEGA)
 137         /* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */
 138         XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU);
 139         XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL);
 140
 141         /* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */
 142         XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
 143         XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB);
 144
 145         PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm;
 146 #endif
 147
 148         /* Hardware Initialization */
 149         LEDs_Init();
 150         Joystick_Init();
 151         Dataflash_Init();
 152         USB_Init();
 153
 154         /* Check if the Dataflash is working, abort if not */
 155         if (!(DataflashManager_CheckDataflashOperation()))
 156         {
 157                 LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 158                 for(;;);
 159         }
 160
 161         /* Clear Dataflash sector protections, if enabled */
 162         DataflashManager_ResetDataflashProtections();
 163 }
 164
 165 /** Checks for changes in the position of the board joystick, sending strings to the host upon each change. */
 166 void CheckJoystickMovement(void)
 167 {
 168         uint8_t     JoyStatus_LCL = Joystick_GetStatus();
 169         char*       ReportString  = NULL;
 170         static bool ActionSent    = false;
 171
 172         if (JoyStatus_LCL & JOY_UP)
 173           ReportString = "Joystick Up\r\n";
 174         else if (JoyStatus_LCL & JOY_DOWN)
 175           ReportString = "Joystick Down\r\n";
 176         else if (JoyStatus_LCL & JOY_LEFT)
 177           ReportString = "Joystick Left\r\n";
 178         else if (JoyStatus_LCL & JOY_RIGHT)
 179           ReportString = "Joystick Right\r\n";
 180         else if (JoyStatus_LCL & JOY_PRESS)
 181           ReportString = "Joystick Pressed\r\n";
 182         else
 183           ActionSent = false;
 184
 185         if ((ReportString != NULL) && (ActionSent == false))
 186         {
 187                 ActionSent = true;
 188
 189                 /* Write the string to the virtual COM port via the created character stream */
 190                 fputs(ReportString, &USBSerialStream);
 191
 192                 /* Alternatively, without the stream: */
 193                 // CDC_Device_SendString(&VirtualSerial_CDC_Interface, ReportString);
 194         }
 195 }
 196
 197 /** Event handler for the library USB Connection event. */
 198 void EVENT_USB_Device_Connect(void)
 199 {
 200         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 201 }
 202
 203 /** Event handler for the library USB Disconnection event. */
 204 void EVENT_USB_Device_Disconnect(void)
 205 {
 206         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 207 }
 208
 209 /** Event handler for the library USB Configuration Changed event. */
 210 void EVENT_USB_Device_ConfigurationChanged(void)
 211 {
 212         bool ConfigSuccess = true;
 213
 214         ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
 215         ConfigSuccess &= MS_Device_ConfigureEndpoints(&Disk_MS_Interface);
 216
 217         LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
 218 }
 219
 220 /** Event handler for the library USB Control Request reception event. */
 221 void EVENT_USB_Device_ControlRequest(void)
 222 {
 223         CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
 224         MS_Device_ProcessControlRequest(&Disk_MS_Interface);
 225 }
 226
 227 /** CDC class driver callback function the processing of changes to the virtual
 228  *  control lines sent from the host..
 229  *
 230  *  \param[in] CDCInterfaceInfo  Pointer to the CDC class interface configuration structure being referenced
 231  */
 232 void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t *const CDCInterfaceInfo)
 233 {
 234         /* You can get changes to the virtual CDC lines in this callback; a common
 235            use-case is to use the Data Terminal Ready (DTR) flag to enable and
 236            disable CDC communications in your application when set to avoid the
 237            application blocking while waiting for a host to become ready and read
 238            in the pending data from the USB endpoints.
 239         */
 240         bool HostReady = (CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR) != 0;
 241 }
 242
 243 /** Mass Storage class driver callback function the reception of SCSI commands from the host, which must be processed.
 244  *
 245  *  \param[in] MSInterfaceInfo  Pointer to the Mass Storage class interface configuration structure being referenced
 246  */
 247 bool CALLBACK_MS_Device_SCSICommandReceived(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo)
 248 {
 249         bool CommandSuccess;
 250
 251         LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 252         CommandSuccess = SCSI_DecodeSCSICommand(MSInterfaceInfo);
 253         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 254
 255         return CommandSuccess;
 256 }
 257