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         if (JoyStatus_LCL & JOY_UP)
 136           ReportString = "Joystick Up\r\n";
 137         else if (JoyStatus_LCL & JOY_DOWN)
 138           ReportString = "Joystick Down\r\n";
 139         else if (JoyStatus_LCL & JOY_LEFT)
 140           ReportString = "Joystick Left\r\n";
 141         else if (JoyStatus_LCL & JOY_RIGHT)
 142           ReportString = "Joystick Right\r\n";
 143         else if (JoyStatus_LCL & JOY_PRESS)
 144           ReportString = "Joystick Pressed\r\n";
 145         else
 146           ActionSent = false;
 147
 148         if ((ReportString != NULL) && (ActionSent == false))
 149         {
 150                 ActionSent = true;
 151
 152                 CDC_Device_SendString(&VirtualSerial1_CDC_Interface, ReportString, strlen(ReportString));
 153         }
 154 }
 155
 156 /** Event handler for the library USB Connection event. */
 157 void EVENT_USB_Device_Connect(void)
 158 {
 159         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 160 }
 161
 162 /** Event handler for the library USB Disconnection event. */
 163 void EVENT_USB_Device_Disconnect(void)
 164 {
 165         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 166 }
 167
 168 /** Event handler for the library USB Configuration Changed event. */
 169 void EVENT_USB_Device_ConfigurationChanged(void)
 170 {
 171         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 172
 173         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial1_CDC_Interface)))
 174           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 175
 176         if (!(CDC_Device_ConfigureEndpoints(&VirtualSerial2_CDC_Interface)))
 177           LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 178 }
 179
 180 /** Event handler for the library USB Unhandled Control Request event. */
 181 void EVENT_USB_Device_UnhandledControlRequest(void)
 182 {
 183         CDC_Device_ProcessControlRequest(&VirtualSerial1_CDC_Interface);
 184         CDC_Device_ProcessControlRequest(&VirtualSerial2_CDC_Interface);
 185 }