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