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