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_Device_t VirtualSerial_CDC_Interface =
  44         {
  45                 .Config =
  46                         {
  47                                 .ControlInterfaceNumber     = 0,
  48
  49                                 .DataINEndpointNumber       = CDC_TX_EPNUM,
  50                                 .DataINEndpointSize         = CDC_TXRX_EPSIZE,
  51
  52                                 .DataOUTEndpointNumber      = CDC_RX_EPNUM,
  53                                 .DataOUTEndpointSize        = CDC_TXRX_EPSIZE,
  54
  55                                 .NotificationEndpointNumber = CDC_NOTIFICATION_EPNUM,
  56                                 .NotificationEndpointSize   = CDC_NOTIFICATION_EPSIZE,
  57                         },
  58
  59                 .State =
  60                         {
  61                                 // Leave all state values to their defaults
  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
  74         for (;;)
  75         {
  76                 CheckJoystickMovement();
  77
  78                 uint16_t BytesToDiscard = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface);
  79                 while (BytesToDiscard--)
  80                   CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
  81
  82                 CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
  83                 USB_USBTask();
  84         }
  85 }
  86
  87 /** Configures the board hardware and chip peripherals for the demo's functionality. */
  88 void SetupHardware(void)
  89 {
  90         /* Disable watchdog if enabled by bootloader/fuses */
  91         MCUSR &= ~(1 << WDRF);
  92         wdt_disable();
  93
  94         /* Disable clock division */
  95         clock_prescale_set(clock_div_1);
  96
  97         /* Hardware Initialization */
  98         Joystick_Init();
  99         LEDs_Init();
 100         USB_Init();
 101 }
 102
 103 /** Checks for changes in the position of the board joystick, sending strings to the host upon each change. */
 104 void CheckJoystickMovement(void)
 105 {
 106         uint8_t     JoyStatus_LCL = Joystick_GetStatus();
 107         char*       ReportString  = NULL;
 108         static bool ActionSent    = false;
 109
 110         char* JoystickStrings[] =
 111                 {
 112                         "Joystick Up\r\n",
 113                         "Joystick Down\r\n",
 114                         "Joystick Left\r\n",
 115                         "Joystick Right\r\n",
 116                         "Joystick Pressed\r\n",
 117                 };
 118
 119         if (JoyStatus_LCL & JOY_UP)
 120           ReportString = JoystickStrings[0];
 121         else if (JoyStatus_LCL & JOY_DOWN)
 122           ReportString = JoystickStrings[1];
 123         else if (JoyStatus_LCL & JOY_LEFT)
 124           ReportString = JoystickStrings[2];
 125         else if (JoyStatus_LCL & JOY_RIGHT)
 126           ReportString = JoystickStrings[3];
 127         else if (JoyStatus_LCL & JOY_PRESS)
 128           ReportString = JoystickStrings[4];
 129         else
 130           ActionSent = false;
 131
 132         if ((ReportString != NULL) && (ActionSent == false))
 133         {
 134                 ActionSent = true;
 135
 136                 CDC_Device_SendString(&VirtualSerial_CDC_Interface, ReportString, strlen(ReportString));
 137         }
 138 }
 139
 140 /** Event handler for the library USB Connection event. */
 141 void EVENT_USB_Connect(void)
 142 {
 143         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 144 }
 145
 146 /** Event handler for the library USB Disconnection event. */
 147 void EVENT_USB_Disconnect(void)
 148 {
 149         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 150 }
 151
 152 /** Event handler for the library USB Configuration Changed event. */
 153 void EVENT_USB_ConfigurationChanged(void)
 154 {
 155         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 156
 157         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))
 158           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 159 }
 160
 161 /** Event handler for the library USB Unhandled Control Packet event. */
 162 void EVENT_USB_UnhandledControlPacket(void)
 163 {
 164         CDC_Device_ProcessControlPacket(&VirtualSerial_CDC_Interface);
 165 }