Demos/Device/CDC/CDC.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   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 disclaim 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 #include "CDC.h"
  32
  33 USB_ClassInfo_CDC_t VirtualSerial_CDC_Interface =
  34         {
  35                 .ControlInterfaceNumber     = 0,
  36
  37                 .DataINEndpointNumber       = CDC_TX_EPNUM,
  38                 .DataINEndpointSize         = CDC_TXRX_EPSIZE,
  39
  40                 .DataOUTEndpointNumber      = CDC_RX_EPNUM,
  41                 .DataOUTEndpointSize        = CDC_TXRX_EPSIZE,
  42
  43                 .NotificationEndpointNumber = CDC_NOTIFICATION_EPNUM,
  44                 .NotificationEndpointSize   = CDC_NOTIFICATION_EPSIZE,
  45         };
  46
  47 int main(void)
  48 {
  49         SetupHardware();
  50
  51         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  52
  53         for (;;)
  54         {
  55                 CheckJoystickMovement();
  56
  57                 uint16_t BytesToDiscard = USB_CDC_BytesReceived(&VirtualSerial_CDC_Interface);
  58                 while (BytesToDiscard--)
  59                   USB_CDC_ReceiveByte(&VirtualSerial_CDC_Interface);
  60
  61                 USB_CDC_USBTask(&VirtualSerial_CDC_Interface);
  62                 USB_USBTask();
  63         }
  64 }
  65
  66 void SetupHardware(void)
  67 {
  68         /* Disable watchdog if enabled by bootloader/fuses */
  69         MCUSR &= ~(1 << WDRF);
  70         wdt_disable();
  71
  72         /* Disable clock division */
  73         clock_prescale_set(clock_div_1);
  74
  75         /* Hardware Initialization */
  76         Joystick_Init();
  77         LEDs_Init();
  78         USB_Init();
  79 }
  80
  81 void CheckJoystickMovement(void)
  82 {
  83         uint8_t     JoyStatus_LCL = Joystick_GetStatus();
  84         char*       ReportString  = NULL;
  85         static bool ActionSent = false;
  86
  87         char* JoystickStrings[] =
  88                 {
  89                         "Joystick Up\r\n",
  90                         "Joystick Down\r\n",
  91                         "Joystick Left\r\n",
  92                         "Joystick Right\r\n",
  93                         "Joystick Pressed\r\n",
  94                 };
  95
  96         if (JoyStatus_LCL & JOY_UP)
  97           ReportString = JoystickStrings[0];
  98         else if (JoyStatus_LCL & JOY_DOWN)
  99           ReportString = JoystickStrings[1];
 100         else if (JoyStatus_LCL & JOY_LEFT)
 101           ReportString = JoystickStrings[2];
 102         else if (JoyStatus_LCL & JOY_RIGHT)
 103           ReportString = JoystickStrings[3];
 104         else if (JoyStatus_LCL & JOY_PRESS)
 105           ReportString = JoystickStrings[4];
 106         else
 107           ActionSent = false;
 108
 109         if ((ReportString != NULL) && (ActionSent == false))
 110         {
 111                 ActionSent = true;
 112
 113                 USB_CDC_SendString(&VirtualSerial_CDC_Interface, ReportString, strlen(ReportString));
 114         }
 115 }
 116
 117 void EVENT_USB_Connect(void)
 118 {
 119         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 120 }
 121
 122 void EVENT_USB_Disconnect(void)
 123 {
 124         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 125 }
 126
 127 void EVENT_USB_ConfigurationChanged(void)
 128 {
 129         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 130
 131         if (!(USB_CDC_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))
 132           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 133 }
 134
 135 void EVENT_USB_UnhandledControlPacket(void)
 136 {
 137         USB_CDC_ProcessControlPacket(&VirtualSerial_CDC_Interface);
 138 }