Demos/Device/ClassDriver/DualCDC/DualCDC.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 DualCDC demo. This file contains the main tasks of
  34  *  the demo and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "DualCDC.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. This is for the first CDC interface,
  42  *  which sends strings to the host for each joystick movement.
  43  */
  44 USB_ClassInfo_CDC_Device_t VirtualSerial1_CDC_Interface =
  45         {
  46                 .Config =
  47                         {
  48                                 .ControlInterfaceNumber     = 0,
  49
  50                                 .DataINEndpointNumber       = CDC1_TX_EPNUM,
  51                                 .DataINEndpointSize         = CDC_TXRX_EPSIZE,
  52
  53                                 .DataOUTEndpointNumber      = CDC1_RX_EPNUM,
  54                                 .DataOUTEndpointSize        = CDC_TXRX_EPSIZE,
  55
  56                                 .NotificationEndpointNumber = CDC1_NOTIFICATION_EPNUM,
  57                                 .NotificationEndpointSize   = CDC_NOTIFICATION_EPSIZE,
  58                         },
  59
  60                 .State =
  61                         {
  62                                 // Leave all state values to their defaults
  63                         }
  64         };
  65
  66 /** LUFA CDC Class driver interface configuration and state information. This structure is
  67  *  passed to all CDC Class driver functions, so that multiple instances of the same class
  68  *  within a device can be differentiated from one another. This is for the second CDC interface,
  69  *  which echos back all received data from the host.
  70  */
  71 USB_ClassInfo_CDC_Device_t VirtualSerial2_CDC_Interface =
  72         {
  73                 .Config =
  74                         {
  75                                 .ControlInterfaceNumber     = 2,
  76
  77                                 .DataINEndpointNumber       = CDC2_TX_EPNUM,
  78                                 .DataINEndpointSize         = CDC_TXRX_EPSIZE,
  79
  80                                 .DataOUTEndpointNumber      = CDC2_RX_EPNUM,
  81                                 .DataOUTEndpointSize        = CDC_TXRX_EPSIZE,
  82
  83                                 .NotificationEndpointNumber = CDC2_NOTIFICATION_EPNUM,
  84                                 .NotificationEndpointSize   = CDC_NOTIFICATION_EPSIZE,
  85                         },
  86
  87                 .State =
  88                         {
  89                                 // Leave all state values to their defaults
  90                         }
  91         };
  92
  93 /** Main program entry point. This routine contains the overall program flow, including initial
  94  *  setup of all components and the main program loop.
  95  */
  96 int main(void)
  97 {
  98         SetupHardware();
  99
 100         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 101
 102         for (;;)
 103         {
 104                 CheckJoystickMovement();
 105
 106                 /* Discard all received data on the first CDC interface */
 107                 uint16_t BytesToDiscard = CDC_Device_BytesReceived(&VirtualSerial1_CDC_Interface);
 108                 while (BytesToDiscard--)
 109                   CDC_Device_ReceiveByte(&VirtualSerial1_CDC_Interface);
 110
 111                 /* Echo all received data on the second CDC interface */
 112                 uint16_t BytesToEcho = CDC_Device_BytesReceived(&VirtualSerial2_CDC_Interface);
 113                 while (BytesToEcho--)
 114                   CDC_Device_SendByte(&VirtualSerial2_CDC_Interface, CDC_Device_ReceiveByte(&VirtualSerial2_CDC_Interface));
 115
 116                 CDC_Device_USBTask(&VirtualSerial1_CDC_Interface);
 117                 CDC_Device_USBTask(&VirtualSerial2_CDC_Interface);
 118                 USB_USBTask();
 119         }
 120 }
 121
 122 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 123 void SetupHardware(void)
 124 {
 125         /* Disable watchdog if enabled by bootloader/fuses */
 126         MCUSR &= ~(1 << WDRF);
 127         wdt_disable();
 128
 129         /* Disable clock division */
 130         clock_prescale_set(clock_div_1);
 131
 132         /* Hardware Initialization */
 133         Joystick_Init();
 134         LEDs_Init();
 135         USB_Init();
 136 }
 137
 138 /** Checks for changes in the position of the board joystick, sending strings to the host upon each change
 139  *  through the first of the CDC interfaces.
 140  */
 141 void CheckJoystickMovement(void)
 142 {
 143         uint8_t     JoyStatus_LCL = Joystick_GetStatus();
 144         char*       ReportString  = NULL;
 145         static bool ActionSent = false;
 146
 147         char* JoystickStrings[] =
 148                 {
 149                         "Joystick Up\r\n",
 150                         "Joystick Down\r\n",
 151                         "Joystick Left\r\n",
 152                         "Joystick Right\r\n",
 153                         "Joystick Pressed\r\n",
 154                 };
 155
 156         if (JoyStatus_LCL & JOY_UP)
 157           ReportString = JoystickStrings[0];
 158         else if (JoyStatus_LCL & JOY_DOWN)
 159           ReportString = JoystickStrings[1];
 160         else if (JoyStatus_LCL & JOY_LEFT)
 161           ReportString = JoystickStrings[2];
 162         else if (JoyStatus_LCL & JOY_RIGHT)
 163           ReportString = JoystickStrings[3];
 164         else if (JoyStatus_LCL & JOY_PRESS)
 165           ReportString = JoystickStrings[4];
 166         else
 167           ActionSent = false;
 168
 169         if ((ReportString != NULL) && (ActionSent == false))
 170         {
 171                 ActionSent = true;
 172
 173                 CDC_Device_SendString(&VirtualSerial1_CDC_Interface, ReportString, strlen(ReportString));
 174         }
 175 }
 176
 177 /** Event handler for the library USB Connection event. */
 178 void EVENT_USB_Connect(void)
 179 {
 180         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 181 }
 182
 183 /** Event handler for the library USB Disconnection event. */
 184 void EVENT_USB_Disconnect(void)
 185 {
 186         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 187 }
 188
 189 /** Event handler for the library USB Configuration Changed event. */
 190 void EVENT_USB_ConfigurationChanged(void)
 191 {
 192         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 193
 194         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial1_CDC_Interface)))
 195           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 196
 197         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial2_CDC_Interface)))
 198           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 199 }
 200
 201 /** Event handler for the library USB Unhandled Control Packet event. */
 202 void EVENT_USB_UnhandledControlPacket(void)
 203 {
 204         CDC_Device_ProcessControlPacket(&VirtualSerial1_CDC_Interface);
 205         CDC_Device_ProcessControlPacket(&VirtualSerial2_CDC_Interface);
 206 }