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
  83 /** Main program entry point. This routine contains the overall program flow, including initial
  84  *  setup of all components and the main program loop.
  85  */
  86 int main(void)
  87 {
  88         SetupHardware();
  89
  90         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  91
  92         for (;;)
  93         {
  94                 CheckJoystickMovement();
  95
  96                 /* Discard all received data on the first CDC interface */
  97                 while (CDC_Device_BytesReceived(&VirtualSerial1_CDC_Interface))
  98                   CDC_Device_ReceiveByte(&VirtualSerial1_CDC_Interface);
  99
 100                 /* Echo all received data on the second CDC interface */
 101                 while (CDC_Device_BytesReceived(&VirtualSerial2_CDC_Interface))
 102                   CDC_Device_SendByte(&VirtualSerial2_CDC_Interface, CDC_Device_ReceiveByte(&VirtualSerial2_CDC_Interface));
 103
 104                 CDC_Device_USBTask(&VirtualSerial1_CDC_Interface);
 105                 CDC_Device_USBTask(&VirtualSerial2_CDC_Interface);
 106                 USB_USBTask();
 107         }
 108 }
 109
 110 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 111 void SetupHardware(void)
 112 {
 113         /* Disable watchdog if enabled by bootloader/fuses */
 114         MCUSR &= ~(1 << WDRF);
 115         wdt_disable();
 116
 117         /* Disable clock division */
 118         clock_prescale_set(clock_div_1);
 119
 120         /* Hardware Initialization */
 121         Joystick_Init();
 122         LEDs_Init();
 123         USB_Init();
 124 }
 125
 126 /** Checks for changes in the position of the board joystick, sending strings to the host upon each change
 127  *  through the first of the CDC interfaces.
 128  */
 129 void CheckJoystickMovement(void)
 130 {
 131         uint8_t     JoyStatus_LCL = Joystick_GetStatus();
 132         char*       ReportString  = NULL;
 133         static bool ActionSent = false;
 134
 135         char* const JoystickStrings[] =
 136                 {
 137                         "Joystick Up\r\n",
 138                         "Joystick Down\r\n",
 139                         "Joystick Left\r\n",
 140                         "Joystick Right\r\n",
 141                         "Joystick Pressed\r\n",
 142                 };
 143
 144         if (JoyStatus_LCL & JOY_UP)
 145           ReportString = JoystickStrings[0];
 146         else if (JoyStatus_LCL & JOY_DOWN)
 147           ReportString = JoystickStrings[1];
 148         else if (JoyStatus_LCL & JOY_LEFT)
 149           ReportString = JoystickStrings[2];
 150         else if (JoyStatus_LCL & JOY_RIGHT)
 151           ReportString = JoystickStrings[3];
 152         else if (JoyStatus_LCL & JOY_PRESS)
 153           ReportString = JoystickStrings[4];
 154         else
 155           ActionSent = false;
 156
 157         if ((ReportString != NULL) && (ActionSent == false))
 158         {
 159                 ActionSent = true;
 160
 161                 CDC_Device_SendString(&VirtualSerial1_CDC_Interface, ReportString, strlen(ReportString));
 162         }
 163 }
 164
 165 /** Event handler for the library USB Connection event. */
 166 void EVENT_USB_Connect(void)
 167 {
 168         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 169 }
 170
 171 /** Event handler for the library USB Disconnection event. */
 172 void EVENT_USB_Disconnect(void)
 173 {
 174         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 175 }
 176
 177 /** Event handler for the library USB Configuration Changed event. */
 178 void EVENT_USB_ConfigurationChanged(void)
 179 {
 180         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 181
 182         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial1_CDC_Interface)))
 183           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 184
 185         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial2_CDC_Interface)))
 186           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 187 }
 188
 189 /** Event handler for the library USB Unhandled Control Packet event. */
 190 void EVENT_USB_UnhandledControlPacket(void)
 191 {
 192         CDC_Device_ProcessControlPacket(&VirtualSerial1_CDC_Interface);
 193         CDC_Device_ProcessControlPacket(&VirtualSerial2_CDC_Interface);
 194 }