Demos/Device/ClassDriver/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 /** \file
  32  *
  33  *  Main source file for the CDC demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "CDC.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_t VirtualSerial_CDC_Interface =
  44         {
  45                 .ControlInterfaceNumber     = 0,
  46
  47                 .DataINEndpointNumber       = CDC_TX_EPNUM,
  48                 .DataINEndpointSize         = CDC_TXRX_EPSIZE,
  49
  50                 .DataOUTEndpointNumber      = CDC_RX_EPNUM,
  51                 .DataOUTEndpointSize        = CDC_TXRX_EPSIZE,
  52
  53                 .NotificationEndpointNumber = CDC_NOTIFICATION_EPNUM,
  54                 .NotificationEndpointSize   = CDC_NOTIFICATION_EPSIZE,
  55         };
  56
  57 /** Main program entry point. This routine contains the overall program flow, including initial
  58  *  setup of all components and the main program loop.
  59  */
  60 int main(void)
  61 {
  62         SetupHardware();
  63
  64         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  65
  66         for (;;)
  67         {
  68                 CheckJoystickMovement();
  69
  70                 uint16_t BytesToDiscard = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface);
  71                 while (BytesToDiscard--)
  72                   CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
  73
  74                 CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
  75                 USB_USBTask();
  76         }
  77 }
  78
  79 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  80 void SetupHardware(void)
  81 {
  82         /* Disable watchdog if enabled by bootloader/fuses */
  83         MCUSR &= ~(1 << WDRF);
  84         wdt_disable();
  85
  86         /* Disable clock division */
  87         clock_prescale_set(clock_div_1);
  88
  89         /* Hardware Initialization */
  90         Joystick_Init();
  91         LEDs_Init();
  92         USB_Init();
  93 }
  94
  95 /** Checks for changes in the position of the board joystick, sending strings to the host upon each change. */
  96 void CheckJoystickMovement(void)
  97 {
  98         uint8_t     JoyStatus_LCL = Joystick_GetStatus();
  99         char*       ReportString  = NULL;
 100         static bool ActionSent    = false;
 101
 102         char* JoystickStrings[] =
 103                 {
 104                         "Joystick Up\r\n",
 105                         "Joystick Down\r\n",
 106                         "Joystick Left\r\n",
 107                         "Joystick Right\r\n",
 108                         "Joystick Pressed\r\n",
 109                 };
 110
 111         if (JoyStatus_LCL & JOY_UP)
 112           ReportString = JoystickStrings[0];
 113         else if (JoyStatus_LCL & JOY_DOWN)
 114           ReportString = JoystickStrings[1];
 115         else if (JoyStatus_LCL & JOY_LEFT)
 116           ReportString = JoystickStrings[2];
 117         else if (JoyStatus_LCL & JOY_RIGHT)
 118           ReportString = JoystickStrings[3];
 119         else if (JoyStatus_LCL & JOY_PRESS)
 120           ReportString = JoystickStrings[4];
 121         else
 122           ActionSent = false;
 123
 124         if ((ReportString != NULL) && (ActionSent == false))
 125         {
 126                 ActionSent = true;
 127
 128                 CDC_Device_SendString(&VirtualSerial_CDC_Interface, ReportString, strlen(ReportString));
 129         }
 130 }
 131
 132 /** Event handler for the library USB Connection event. */
 133 void EVENT_USB_Connect(void)
 134 {
 135         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 136 }
 137
 138 /** Event handler for the library USB Disconnection event. */
 139 void EVENT_USB_Disconnect(void)
 140 {
 141         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 142 }
 143
 144 /** Event handler for the library USB Configuration Changed event. */
 145 void EVENT_USB_ConfigurationChanged(void)
 146 {
 147         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 148
 149         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))
 150           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 151 }
 152
 153 /** Event handler for the library USB Unhandled Control Packet event. */
 154 void EVENT_USB_UnhandledControlPacket(void)
 155 {
 156         CDC_Device_ProcessControlPacket(&VirtualSerial_CDC_Interface);
 157 }