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                 while (CDC_Device_BytesReceived(&VirtualSerial1_CDC_Interface))
 103                   CDC_Device_ReceiveByte(&VirtualSerial1_CDC_Interface);
 104
 105                 /* Echo all received data on the second CDC interface */
 106                 while (CDC_Device_BytesReceived(&VirtualSerial2_CDC_Interface))
 107                   CDC_Device_SendByte(&VirtualSerial2_CDC_Interface, CDC_Device_ReceiveByte(&VirtualSerial2_CDC_Interface));
 108
 109                 CDC_Device_USBTask(&VirtualSerial1_CDC_Interface);
 110                 CDC_Device_USBTask(&VirtualSerial2_CDC_Interface);
 111                 USB_USBTask();
 112         }
 113 }
 114
 115 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 116 void SetupHardware(void)
 117 {
 118         /* Disable watchdog if enabled by bootloader/fuses */
 119         MCUSR &= ~(1 << WDRF);
 120         wdt_disable();
 121
 122         /* Disable clock division */
 123         clock_prescale_set(clock_div_1);
 124
 125         /* Hardware Initialization */
 126         Joystick_Init();
 127         LEDs_Init();
 128         USB_Init();
 129 }
 130
 131 /** Checks for changes in the position of the board joystick, sending strings to the host upon each change
 132  *  through the first of the CDC interfaces.
 133  */
 134 void CheckJoystickMovement(void)
 135 {
 136         uint8_t     JoyStatus_LCL = Joystick_GetStatus();
 137         char*       ReportString  = NULL;
 138         static bool ActionSent = false;
 139
 140         char* const JoystickStrings[] =
 141                 {
 142                         "Joystick Up\r\n",
 143                         "Joystick Down\r\n",
 144                         "Joystick Left\r\n",
 145                         "Joystick Right\r\n",
 146                         "Joystick Pressed\r\n",
 147                 };
 148
 149         if (JoyStatus_LCL & JOY_UP)
 150           ReportString = JoystickStrings[0];
 151         else if (JoyStatus_LCL & JOY_DOWN)
 152           ReportString = JoystickStrings[1];
 153         else if (JoyStatus_LCL & JOY_LEFT)
 154           ReportString = JoystickStrings[2];
 155         else if (JoyStatus_LCL & JOY_RIGHT)
 156           ReportString = JoystickStrings[3];
 157         else if (JoyStatus_LCL & JOY_PRESS)
 158           ReportString = JoystickStrings[4];
 159         else
 160           ActionSent = false;
 161
 162         if ((ReportString != NULL) && (ActionSent == false))
 163         {
 164                 ActionSent = true;
 165
 166                 CDC_Device_SendString(&VirtualSerial1_CDC_Interface, ReportString, strlen(ReportString));
 167         }
 168 }
 169
 170 /** Event handler for the library USB Connection event. */
 171 void EVENT_USB_Connect(void)
 172 {
 173         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 174 }
 175
 176 /** Event handler for the library USB Disconnection event. */
 177 void EVENT_USB_Disconnect(void)
 178 {
 179         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 180 }
 181
 182 /** Event handler for the library USB Configuration Changed event. */
 183 void EVENT_USB_ConfigurationChanged(void)
 184 {
 185         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 186
 187         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial1_CDC_Interface)))
 188           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 189
 190         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial2_CDC_Interface)))
 191           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 192 }
 193
 194 /** Event handler for the library USB Unhandled Control Packet event. */
 195 void EVENT_USB_UnhandledControlPacket(void)
 196 {
 197         CDC_Device_ProcessControlPacket(&VirtualSerial1_CDC_Interface);
 198         CDC_Device_ProcessControlPacket(&VirtualSerial2_CDC_Interface);
 199 }