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