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                                 .DataINEndpointDoubleBank       = false,
  52
  53                                 .DataOUTEndpointNumber          = CDC_RX_EPNUM,
  54                                 .DataOUTEndpointSize            = CDC_TXRX_EPSIZE,
  55                                 .DataOUTEndpointDoubleBank      = false,
  56
  57                                 .NotificationEndpointNumber     = CDC_NOTIFICATION_EPNUM,
  58                                 .NotificationEndpointSize       = CDC_NOTIFICATION_EPSIZE,
  59                                 .NotificationEndpointDoubleBank = false,
  60                         },
  61         };
  62
  63 #if 0
  64 /* NOTE: Here you can set up a standard stream using the created virtual serial port, so that the standard stream functions in
  65  *       <stdio.h> can be used on the virtual serial port (e.g. fprintf(&USBSerial, "Test"); to print a string).
  66  */
  67
  68 static int CDC_putchar(char c, FILE *stream)
  69 {
  70         CDC_Device_SendByte(&VirtualSerial_CDC_Interface, c);
  71         return 0;
  72 }
  73
  74 static int CDC_getchar(FILE *stream)
  75 {
  76         if (!(CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface)))
  77           return -1;
  78
  79         return CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
  80 }
  81
  82 static FILE USBSerial = FDEV_SETUP_STREAM(CDC_putchar, CDC_getchar, _FDEV_SETUP_RW);
  83 #endif
  84
  85 /** Main program entry point. This routine contains the overall program flow, including initial
  86  *  setup of all components and the main program loop.
  87  */
  88 int main(void)
  89 {
  90         SetupHardware();
  91
  92         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  93
  94         for (;;)
  95         {
  96                 CheckJoystickMovement();
  97
  98                 /* Must throw away unused bytes from the host, or it will lock up while waiting for the device */
  99                 while (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface))
 100                   CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
 101
 102                 CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
 103                 USB_USBTask();
 104         }
 105 }
 106
 107 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 108 void SetupHardware(void)
 109 {
 110         /* Disable watchdog if enabled by bootloader/fuses */
 111         MCUSR &= ~(1 << WDRF);
 112         wdt_disable();
 113
 114         /* Disable clock division */
 115         clock_prescale_set(clock_div_1);
 116
 117         /* Hardware Initialization */
 118         Joystick_Init();
 119         LEDs_Init();
 120         USB_Init();
 121 }
 122
 123 /** Checks for changes in the position of the board joystick, sending strings to the host upon each change. */
 124 void CheckJoystickMovement(void)
 125 {
 126         uint8_t     JoyStatus_LCL = Joystick_GetStatus();
 127         char*       ReportString  = NULL;
 128         static bool ActionSent    = false;
 129
 130         if (JoyStatus_LCL & JOY_UP)
 131           ReportString = "Joystick Up\r\n";
 132         else if (JoyStatus_LCL & JOY_DOWN)
 133           ReportString = "Joystick Down\r\n";
 134         else if (JoyStatus_LCL & JOY_LEFT)
 135           ReportString = "Joystick Left\r\n";
 136         else if (JoyStatus_LCL & JOY_RIGHT)
 137           ReportString = "Joystick Right\r\n";
 138         else if (JoyStatus_LCL & JOY_PRESS)
 139           ReportString = "Joystick Pressed\r\n";
 140         else
 141           ActionSent = false;
 142
 143         if ((ReportString != NULL) && (ActionSent == false))
 144         {
 145                 ActionSent = true;
 146
 147                 CDC_Device_SendString(&VirtualSerial_CDC_Interface, ReportString, strlen(ReportString));
 148         }
 149 }
 150
 151 /** Event handler for the library USB Connection event. */
 152 void EVENT_USB_Device_Connect(void)
 153 {
 154         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 155 }
 156
 157 /** Event handler for the library USB Disconnection event. */
 158 void EVENT_USB_Device_Disconnect(void)
 159 {
 160         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 161 }
 162
 163 /** Event handler for the library USB Configuration Changed event. */
 164 void EVENT_USB_Device_ConfigurationChanged(void)
 165 {
 166         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 167
 168         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))
 169           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 170 }
 171
 172 /** Event handler for the library USB Unhandled Control Request event. */
 173 void EVENT_USB_Device_UnhandledControlRequest(void)
 174 {
 175         CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
 176 }