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                 /* Must throw away unused bytes from the host, or it will lock up while waiting for the device */
  96                 while (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface))
  97                   CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
  98
  99                 CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
 100                 USB_USBTask();
 101         }
 102 }
 103
 104 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 105 void SetupHardware(void)
 106 {
 107         /* Disable watchdog if enabled by bootloader/fuses */
 108         MCUSR &= ~(1 << WDRF);
 109         wdt_disable();
 110
 111         /* Disable clock division */
 112         clock_prescale_set(clock_div_1);
 113
 114         /* Hardware Initialization */
 115         Joystick_Init();
 116         LEDs_Init();
 117         USB_Init();
 118 }
 119
 120 /** Checks for changes in the position of the board joystick, sending strings to the host upon each change. */
 121 void CheckJoystickMovement(void)
 122 {
 123         uint8_t     JoyStatus_LCL = Joystick_GetStatus();
 124         char*       ReportString  = NULL;
 125         static bool ActionSent    = false;
 126
 127         char* const JoystickStrings[] =
 128                 {
 129                         "Joystick Up\r\n",
 130                         "Joystick Down\r\n",
 131                         "Joystick Left\r\n",
 132                         "Joystick Right\r\n",
 133                         "Joystick Pressed\r\n",
 134                 };
 135
 136         if (JoyStatus_LCL & JOY_UP)
 137           ReportString = JoystickStrings[0];
 138         else if (JoyStatus_LCL & JOY_DOWN)
 139           ReportString = JoystickStrings[1];
 140         else if (JoyStatus_LCL & JOY_LEFT)
 141           ReportString = JoystickStrings[2];
 142         else if (JoyStatus_LCL & JOY_RIGHT)
 143           ReportString = JoystickStrings[3];
 144         else if (JoyStatus_LCL & JOY_PRESS)
 145           ReportString = JoystickStrings[4];
 146         else
 147           ActionSent = false;
 148
 149         if ((ReportString != NULL) && (ActionSent == false))
 150         {
 151                 ActionSent = true;
 152
 153                 CDC_Device_SendString(&VirtualSerial_CDC_Interface, ReportString, strlen(ReportString));
 154         }
 155 }
 156
 157 /** Event handler for the library USB Connection event. */
 158 void EVENT_USB_Device_Connect(void)
 159 {
 160         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 161 }
 162
 163 /** Event handler for the library USB Disconnection event. */
 164 void EVENT_USB_Device_Disconnect(void)
 165 {
 166         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 167 }
 168
 169 /** Event handler for the library USB Configuration Changed event. */
 170 void EVENT_USB_Device_ConfigurationChanged(void)
 171 {
 172         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 173
 174         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface)))
 175           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 176 }
 177
 178 /** Event handler for the library USB Unhandled Control Request event. */
 179 void EVENT_USB_Device_UnhandledControlRequest(void)
 180 {
 181         CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
 182 }