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