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
  60 #if 0
  61 /* NOTE: Here you can set up a standard stream using the created virtual serial port, so that the standard stream functions in
  62  *       <stdio.h> can be used on the virtual serial port (e.g. fprintf(&USBSerial, "Test"); to print a string).
  63  */
  64
  65 static int CDC_putchar(char c, FILE *stream)
  66 {
  67         CDC_Device_SendByte(&VirtualSerial_CDC_Interface, c);
  68         return 0;
  69 }
  70
  71 static int CDC_getchar(FILE *stream)
  72 {
  73         if (!(CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface)))
  74           return -1;
  75
  76         return CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
  77 }
  78
  79 static FILE USBSerial = FDEV_SETUP_STREAM(CDC_putchar, CDC_getchar, _FDEV_SETUP_RW);
  80 #endif
  81
  82 /** Main program entry point. This routine contains the overall program flow, including initial
  83  *  setup of all components and the main program loop.
  84  */
  85 int main(void)
  86 {
  87         SetupHardware();
  88
  89         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  90
  91         for (;;)
  92         {
  93                 CheckJoystickMovement();
  94
  95                 while (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface))
  96                   CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
  97
  98                 CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
  99                 USB_USBTask();
 100         }
 101 }
 102
 103 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 104 void SetupHardware(void)
 105 {
 106         /* Disable watchdog if enabled by bootloader/fuses */
 107         MCUSR &= ~(1 << WDRF);
 108         wdt_disable();
 109
 110         /* Disable clock division */
 111         clock_prescale_set(clock_div_1);
 112
 113         /* Hardware Initialization */
 114         Joystick_Init();
 115         LEDs_Init();
 116         USB_Init();
 117 }
 118
 119 /** Checks for changes in the position of the board joystick, sending strings to the host upon each change. */
 120 void CheckJoystickMovement(void)
 121 {
 122         uint8_t     JoyStatus_LCL = Joystick_GetStatus();
 123         char*       ReportString  = NULL;
 124         static bool ActionSent    = false;
 125
 126         char* const JoystickStrings[] =
 127                 {
 128                         "Joystick Up\r\n",
 129                         "Joystick Down\r\n",
 130                         "Joystick Left\r\n",
 131                         "Joystick Right\r\n",
 132                         "Joystick Pressed\r\n",
 133                 };
 134
 135         if (JoyStatus_LCL & JOY_UP)
 136           ReportString = JoystickStrings[0];
 137         else if (JoyStatus_LCL & JOY_DOWN)
 138           ReportString = JoystickStrings[1];
 139         else if (JoyStatus_LCL & JOY_LEFT)
 140           ReportString = JoystickStrings[2];
 141         else if (JoyStatus_LCL & JOY_RIGHT)
 142           ReportString = JoystickStrings[3];
 143         else if (JoyStatus_LCL & JOY_PRESS)
 144           ReportString = JoystickStrings[4];
 145         else
 146           ActionSent = false;
 147
 148         if ((ReportString != NULL) && (ActionSent == false))
 149         {
 150                 ActionSent = true;
 151
 152                 CDC_Device_SendString(&VirtualSerial_CDC_Interface, ReportString, strlen(ReportString));
 153         }
 154 }
 155
 156 /** Event handler for the library USB Connection event. */
 157 void EVENT_USB_Connect(void)
 158 {
 159         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 160 }
 161
 162 /** Event handler for the library USB Disconnection event. */
 163 void EVENT_USB_Disconnect(void)
 164 {
 165         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 166 }
 167
 168 /** Event handler for the library USB Configuration Changed event. */
 169 void EVENT_USB_ConfigurationChanged(void)
 170 {
 171         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 172
 173         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))
 174           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 175 }
 176
 177 /** Event handler for the library USB Unhandled Control Packet event. */
 178 void EVENT_USB_UnhandledControlPacket(void)
 179 {
 180         CDC_Device_ProcessControlPacket(&VirtualSerial_CDC_Interface);
 181 }